Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2011 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com> |
| 3 | * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved. |
| 4 | * |
| 5 | * Authors: |
| 6 | * Paul Mackerras <paulus@au1.ibm.com> |
| 7 | * Alexander Graf <agraf@suse.de> |
| 8 | * Kevin Wolf <mail@kevin-wolf.de> |
| 9 | * |
| 10 | * Description: KVM functions specific to running on Book 3S |
| 11 | * processors in hypervisor mode (specifically POWER7 and later). |
| 12 | * |
| 13 | * This file is derived from arch/powerpc/kvm/book3s.c, |
| 14 | * by Alexander Graf <agraf@suse.de>. |
| 15 | * |
| 16 | * This program is free software; you can redistribute it and/or modify |
| 17 | * it under the terms of the GNU General Public License, version 2, as |
| 18 | * published by the Free Software Foundation. |
| 19 | */ |
| 20 | |
| 21 | #include <linux/kvm_host.h> |
Thomas Meyer | 4bb817ed | 2017-09-03 14:19:31 +0200 | [diff] [blame] | 22 | #include <linux/kernel.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 23 | #include <linux/err.h> |
| 24 | #include <linux/slab.h> |
| 25 | #include <linux/preempt.h> |
Ingo Molnar | 174cd4b | 2017-02-02 19:15:33 +0100 | [diff] [blame] | 26 | #include <linux/sched/signal.h> |
Ingo Molnar | 03441a3 | 2017-02-08 18:51:35 +0100 | [diff] [blame] | 27 | #include <linux/sched/stat.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 28 | #include <linux/delay.h> |
Paul Gortmaker | 66b15db | 2011-05-27 10:46:24 -0400 | [diff] [blame] | 29 | #include <linux/export.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 30 | #include <linux/fs.h> |
| 31 | #include <linux/anon_inodes.h> |
Gavin Shan | 07f8ab25 | 2016-05-11 11:15:55 +1000 | [diff] [blame] | 32 | #include <linux/cpu.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 33 | #include <linux/cpumask.h> |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 34 | #include <linux/spinlock.h> |
| 35 | #include <linux/page-flags.h> |
Paul Mackerras | 2c9097e | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 36 | #include <linux/srcu.h> |
Alexander Graf | 398a76c | 2013-12-09 13:53:42 +0100 | [diff] [blame] | 37 | #include <linux/miscdevice.h> |
Paul Mackerras | e23a808 | 2015-03-28 14:21:01 +1100 | [diff] [blame] | 38 | #include <linux/debugfs.h> |
Benjamin Herrenschmidt | d398914 | 2017-04-05 17:54:51 +1000 | [diff] [blame] | 39 | #include <linux/gfp.h> |
| 40 | #include <linux/vmalloc.h> |
| 41 | #include <linux/highmem.h> |
| 42 | #include <linux/hugetlb.h> |
| 43 | #include <linux/kvm_irqfd.h> |
| 44 | #include <linux/irqbypass.h> |
| 45 | #include <linux/module.h> |
| 46 | #include <linux/compiler.h> |
| 47 | #include <linux/of.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 48 | |
| 49 | #include <asm/reg.h> |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 50 | #include <asm/ppc-opcode.h> |
Nicholas Piggin | 6de6638 | 2017-11-05 23:33:55 +1100 | [diff] [blame] | 51 | #include <asm/asm-prototypes.h> |
Nicholas Piggin | e303c08 | 2018-04-01 15:50:35 +1000 | [diff] [blame] | 52 | #include <asm/debug.h> |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 53 | #include <asm/disassemble.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 54 | #include <asm/cputable.h> |
| 55 | #include <asm/cacheflush.h> |
| 56 | #include <asm/tlbflush.h> |
Linus Torvalds | 7c0f6ba | 2016-12-24 11:46:01 -0800 | [diff] [blame] | 57 | #include <linux/uaccess.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 58 | #include <asm/io.h> |
| 59 | #include <asm/kvm_ppc.h> |
| 60 | #include <asm/kvm_book3s.h> |
| 61 | #include <asm/mmu_context.h> |
| 62 | #include <asm/lppaca.h> |
| 63 | #include <asm/processor.h> |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 64 | #include <asm/cputhreads.h> |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 65 | #include <asm/page.h> |
Michael Neuling | de1d924 | 2011-11-09 20:39:49 +0000 | [diff] [blame] | 66 | #include <asm/hvcall.h> |
David Howells | ae3a197 | 2012-03-28 18:30:02 +0100 | [diff] [blame] | 67 | #include <asm/switch_to.h> |
Paul Mackerras | 512691d | 2012-10-15 01:15:41 +0000 | [diff] [blame] | 68 | #include <asm/smp.h> |
Paul Mackerras | 66feed6 | 2015-03-28 14:21:12 +1100 | [diff] [blame] | 69 | #include <asm/dbell.h> |
Mahesh Salgaonkar | fd7bacb | 2016-05-15 09:44:26 +0530 | [diff] [blame] | 70 | #include <asm/hmi.h> |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 71 | #include <asm/pnv-pci.h> |
Paul Mackerras | 7a84084 | 2016-11-16 22:25:20 +1100 | [diff] [blame] | 72 | #include <asm/mmu.h> |
Paul Mackerras | f725758 | 2016-11-18 09:02:08 +1100 | [diff] [blame] | 73 | #include <asm/opal.h> |
| 74 | #include <asm/xics.h> |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 75 | #include <asm/xive.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 76 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 77 | #include "book3s.h" |
| 78 | |
Suresh E. Warrier | 3c78f78 | 2014-12-03 18:48:10 -0600 | [diff] [blame] | 79 | #define CREATE_TRACE_POINTS |
| 80 | #include "trace_hv.h" |
| 81 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 82 | /* #define EXIT_DEBUG */ |
| 83 | /* #define EXIT_DEBUG_SIMPLE */ |
| 84 | /* #define EXIT_DEBUG_INT */ |
| 85 | |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 86 | /* Used to indicate that a guest page fault needs to be handled */ |
| 87 | #define RESUME_PAGE_FAULT (RESUME_GUEST | RESUME_FLAG_ARCH1) |
Suresh Warrier | f7af520 | 2016-08-19 15:35:52 +1000 | [diff] [blame] | 88 | /* Used to indicate that a guest passthrough interrupt needs to be handled */ |
| 89 | #define RESUME_PASSTHROUGH (RESUME_GUEST | RESUME_FLAG_ARCH2) |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 90 | |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 91 | /* Used as a "null" value for timebase values */ |
| 92 | #define TB_NIL (~(u64)0) |
| 93 | |
Paul Mackerras | 699a0ea | 2014-06-02 11:02:59 +1000 | [diff] [blame] | 94 | static DECLARE_BITMAP(default_enabled_hcalls, MAX_HCALL_OPCODE/4 + 1); |
| 95 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 96 | static int dynamic_mt_modes = 6; |
Russell Currey | 57ad583f | 2017-01-12 14:54:13 +1100 | [diff] [blame] | 97 | module_param(dynamic_mt_modes, int, 0644); |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 98 | MODULE_PARM_DESC(dynamic_mt_modes, "Set of allowed dynamic micro-threading modes: 0 (= none), 2, 4, or 6 (= 2 or 4)"); |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 99 | static int target_smt_mode; |
Russell Currey | 57ad583f | 2017-01-12 14:54:13 +1100 | [diff] [blame] | 100 | module_param(target_smt_mode, int, 0644); |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 101 | MODULE_PARM_DESC(target_smt_mode, "Target threads per core (0 = max)"); |
Stewart Smith | 9678cda | 2014-07-18 14:18:43 +1000 | [diff] [blame] | 102 | |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 103 | static bool indep_threads_mode = true; |
| 104 | module_param(indep_threads_mode, bool, S_IRUGO | S_IWUSR); |
| 105 | MODULE_PARM_DESC(indep_threads_mode, "Independent-threads mode (only on POWER9)"); |
| 106 | |
Suresh E. Warrier | 520fe9c | 2015-12-21 16:33:57 -0600 | [diff] [blame] | 107 | #ifdef CONFIG_KVM_XICS |
| 108 | static struct kernel_param_ops module_param_ops = { |
| 109 | .set = param_set_int, |
| 110 | .get = param_get_int, |
| 111 | }; |
| 112 | |
Russell Currey | 57ad583f | 2017-01-12 14:54:13 +1100 | [diff] [blame] | 113 | module_param_cb(kvm_irq_bypass, &module_param_ops, &kvm_irq_bypass, 0644); |
Suresh Warrier | 644abbb | 2016-08-19 15:35:54 +1000 | [diff] [blame] | 114 | MODULE_PARM_DESC(kvm_irq_bypass, "Bypass passthrough interrupt optimization"); |
| 115 | |
Russell Currey | 57ad583f | 2017-01-12 14:54:13 +1100 | [diff] [blame] | 116 | module_param_cb(h_ipi_redirect, &module_param_ops, &h_ipi_redirect, 0644); |
Suresh E. Warrier | 520fe9c | 2015-12-21 16:33:57 -0600 | [diff] [blame] | 117 | MODULE_PARM_DESC(h_ipi_redirect, "Redirect H_IPI wakeup to a free host core"); |
| 118 | #endif |
| 119 | |
Paul Mackerras | 00608e1 | 2018-01-11 16:54:26 +1100 | [diff] [blame] | 120 | /* If set, the threads on each CPU core have to be in the same MMU mode */ |
| 121 | static bool no_mixing_hpt_and_radix; |
| 122 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 123 | static void kvmppc_end_cede(struct kvm_vcpu *vcpu); |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 124 | static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 125 | |
Paul Mackerras | 7aa1584 | 2018-04-20 19:53:22 +1000 | [diff] [blame] | 126 | /* |
| 127 | * RWMR values for POWER8. These control the rate at which PURR |
| 128 | * and SPURR count and should be set according to the number of |
| 129 | * online threads in the vcore being run. |
| 130 | */ |
| 131 | #define RWMR_RPA_P8_1THREAD 0x164520C62609AECA |
| 132 | #define RWMR_RPA_P8_2THREAD 0x7FFF2908450D8DA9 |
| 133 | #define RWMR_RPA_P8_3THREAD 0x164520C62609AECA |
| 134 | #define RWMR_RPA_P8_4THREAD 0x199A421245058DA9 |
| 135 | #define RWMR_RPA_P8_5THREAD 0x164520C62609AECA |
| 136 | #define RWMR_RPA_P8_6THREAD 0x164520C62609AECA |
| 137 | #define RWMR_RPA_P8_7THREAD 0x164520C62609AECA |
| 138 | #define RWMR_RPA_P8_8THREAD 0x164520C62609AECA |
| 139 | |
| 140 | static unsigned long p8_rwmr_values[MAX_SMT_THREADS + 1] = { |
| 141 | RWMR_RPA_P8_1THREAD, |
| 142 | RWMR_RPA_P8_1THREAD, |
| 143 | RWMR_RPA_P8_2THREAD, |
| 144 | RWMR_RPA_P8_3THREAD, |
| 145 | RWMR_RPA_P8_4THREAD, |
| 146 | RWMR_RPA_P8_5THREAD, |
| 147 | RWMR_RPA_P8_6THREAD, |
| 148 | RWMR_RPA_P8_7THREAD, |
| 149 | RWMR_RPA_P8_8THREAD, |
| 150 | }; |
| 151 | |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 152 | static inline struct kvm_vcpu *next_runnable_thread(struct kvmppc_vcore *vc, |
| 153 | int *ip) |
| 154 | { |
| 155 | int i = *ip; |
| 156 | struct kvm_vcpu *vcpu; |
| 157 | |
| 158 | while (++i < MAX_SMT_THREADS) { |
| 159 | vcpu = READ_ONCE(vc->runnable_threads[i]); |
| 160 | if (vcpu) { |
| 161 | *ip = i; |
| 162 | return vcpu; |
| 163 | } |
| 164 | } |
| 165 | return NULL; |
| 166 | } |
| 167 | |
| 168 | /* Used to traverse the list of runnable threads for a given vcore */ |
| 169 | #define for_each_runnable_thread(i, vcpu, vc) \ |
| 170 | for (i = -1; (vcpu = next_runnable_thread(vc, &i)); ) |
| 171 | |
Paul Mackerras | 66feed6 | 2015-03-28 14:21:12 +1100 | [diff] [blame] | 172 | static bool kvmppc_ipi_thread(int cpu) |
| 173 | { |
Paul Mackerras | 1704a81 | 2016-11-18 08:47:08 +1100 | [diff] [blame] | 174 | unsigned long msg = PPC_DBELL_TYPE(PPC_DBELL_SERVER); |
| 175 | |
| 176 | /* On POWER9 we can use msgsnd to IPI any cpu */ |
| 177 | if (cpu_has_feature(CPU_FTR_ARCH_300)) { |
| 178 | msg |= get_hard_smp_processor_id(cpu); |
| 179 | smp_mb(); |
| 180 | __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg)); |
| 181 | return true; |
| 182 | } |
| 183 | |
Paul Mackerras | 66feed6 | 2015-03-28 14:21:12 +1100 | [diff] [blame] | 184 | /* On POWER8 for IPIs to threads in the same core, use msgsnd */ |
| 185 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) { |
| 186 | preempt_disable(); |
| 187 | if (cpu_first_thread_sibling(cpu) == |
| 188 | cpu_first_thread_sibling(smp_processor_id())) { |
Paul Mackerras | 66feed6 | 2015-03-28 14:21:12 +1100 | [diff] [blame] | 189 | msg |= cpu_thread_in_core(cpu); |
| 190 | smp_mb(); |
| 191 | __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg)); |
| 192 | preempt_enable(); |
| 193 | return true; |
| 194 | } |
| 195 | preempt_enable(); |
| 196 | } |
| 197 | |
| 198 | #if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP) |
Paul Mackerras | f725758 | 2016-11-18 09:02:08 +1100 | [diff] [blame] | 199 | if (cpu >= 0 && cpu < nr_cpu_ids) { |
Nicholas Piggin | d2e6007 | 2018-02-14 01:08:12 +1000 | [diff] [blame] | 200 | if (paca_ptrs[cpu]->kvm_hstate.xics_phys) { |
Paul Mackerras | f725758 | 2016-11-18 09:02:08 +1100 | [diff] [blame] | 201 | xics_wake_cpu(cpu); |
| 202 | return true; |
| 203 | } |
| 204 | opal_int_set_mfrr(get_hard_smp_processor_id(cpu), IPI_PRIORITY); |
Paul Mackerras | 66feed6 | 2015-03-28 14:21:12 +1100 | [diff] [blame] | 205 | return true; |
| 206 | } |
| 207 | #endif |
| 208 | |
| 209 | return false; |
| 210 | } |
| 211 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 212 | static void kvmppc_fast_vcpu_kick_hv(struct kvm_vcpu *vcpu) |
Benjamin Herrenschmidt | 54695c3 | 2013-04-17 20:30:50 +0000 | [diff] [blame] | 213 | { |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 214 | int cpu; |
Marcelo Tosatti | 8577370 | 2016-02-19 09:46:39 +0100 | [diff] [blame] | 215 | struct swait_queue_head *wqp; |
Benjamin Herrenschmidt | 54695c3 | 2013-04-17 20:30:50 +0000 | [diff] [blame] | 216 | |
| 217 | wqp = kvm_arch_vcpu_wq(vcpu); |
Davidlohr Bueso | 267ad7b | 2017-09-13 13:08:23 -0700 | [diff] [blame] | 218 | if (swq_has_sleeper(wqp)) { |
Marcelo Tosatti | 8577370 | 2016-02-19 09:46:39 +0100 | [diff] [blame] | 219 | swake_up(wqp); |
Benjamin Herrenschmidt | 54695c3 | 2013-04-17 20:30:50 +0000 | [diff] [blame] | 220 | ++vcpu->stat.halt_wakeup; |
| 221 | } |
| 222 | |
Paul Mackerras | 3deda5e | 2016-12-20 14:02:29 +1100 | [diff] [blame] | 223 | cpu = READ_ONCE(vcpu->arch.thread_cpu); |
| 224 | if (cpu >= 0 && kvmppc_ipi_thread(cpu)) |
Paul Mackerras | 66feed6 | 2015-03-28 14:21:12 +1100 | [diff] [blame] | 225 | return; |
Benjamin Herrenschmidt | 54695c3 | 2013-04-17 20:30:50 +0000 | [diff] [blame] | 226 | |
| 227 | /* CPU points to the first thread of the core */ |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 228 | cpu = vcpu->cpu; |
Paul Mackerras | 66feed6 | 2015-03-28 14:21:12 +1100 | [diff] [blame] | 229 | if (cpu >= 0 && cpu < nr_cpu_ids && cpu_online(cpu)) |
| 230 | smp_send_reschedule(cpu); |
Benjamin Herrenschmidt | 54695c3 | 2013-04-17 20:30:50 +0000 | [diff] [blame] | 231 | } |
| 232 | |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 233 | /* |
| 234 | * We use the vcpu_load/put functions to measure stolen time. |
| 235 | * Stolen time is counted as time when either the vcpu is able to |
| 236 | * run as part of a virtual core, but the task running the vcore |
| 237 | * is preempted or sleeping, or when the vcpu needs something done |
| 238 | * in the kernel by the task running the vcpu, but that task is |
| 239 | * preempted or sleeping. Those two things have to be counted |
| 240 | * separately, since one of the vcpu tasks will take on the job |
| 241 | * of running the core, and the other vcpu tasks in the vcore will |
| 242 | * sleep waiting for it to do that, but that sleep shouldn't count |
| 243 | * as stolen time. |
| 244 | * |
| 245 | * Hence we accumulate stolen time when the vcpu can run as part of |
| 246 | * a vcore using vc->stolen_tb, and the stolen time when the vcpu |
| 247 | * needs its task to do other things in the kernel (for example, |
| 248 | * service a page fault) in busy_stolen. We don't accumulate |
| 249 | * stolen time for a vcore when it is inactive, or for a vcpu |
| 250 | * when it is in state RUNNING or NOTREADY. NOTREADY is a bit of |
| 251 | * a misnomer; it means that the vcpu task is not executing in |
| 252 | * the KVM_VCPU_RUN ioctl, i.e. it is in userspace or elsewhere in |
| 253 | * the kernel. We don't have any way of dividing up that time |
| 254 | * between time that the vcpu is genuinely stopped, time that |
| 255 | * the task is actively working on behalf of the vcpu, and time |
| 256 | * that the task is preempted, so we don't count any of it as |
| 257 | * stolen. |
| 258 | * |
| 259 | * Updates to busy_stolen are protected by arch.tbacct_lock; |
Paul Mackerras | 2711e24 | 2014-12-04 16:43:28 +1100 | [diff] [blame] | 260 | * updates to vc->stolen_tb are protected by the vcore->stoltb_lock |
| 261 | * lock. The stolen times are measured in units of timebase ticks. |
| 262 | * (Note that the != TB_NIL checks below are purely defensive; |
| 263 | * they should never fail.) |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 264 | */ |
| 265 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 266 | static void kvmppc_core_start_stolen(struct kvmppc_vcore *vc) |
| 267 | { |
| 268 | unsigned long flags; |
| 269 | |
| 270 | spin_lock_irqsave(&vc->stoltb_lock, flags); |
| 271 | vc->preempt_tb = mftb(); |
| 272 | spin_unlock_irqrestore(&vc->stoltb_lock, flags); |
| 273 | } |
| 274 | |
| 275 | static void kvmppc_core_end_stolen(struct kvmppc_vcore *vc) |
| 276 | { |
| 277 | unsigned long flags; |
| 278 | |
| 279 | spin_lock_irqsave(&vc->stoltb_lock, flags); |
| 280 | if (vc->preempt_tb != TB_NIL) { |
| 281 | vc->stolen_tb += mftb() - vc->preempt_tb; |
| 282 | vc->preempt_tb = TB_NIL; |
| 283 | } |
| 284 | spin_unlock_irqrestore(&vc->stoltb_lock, flags); |
| 285 | } |
| 286 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 287 | static void kvmppc_core_vcpu_load_hv(struct kvm_vcpu *vcpu, int cpu) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 288 | { |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 289 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
Paul Mackerras | bf3d32e | 2013-11-16 17:46:04 +1100 | [diff] [blame] | 290 | unsigned long flags; |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 291 | |
Paul Mackerras | 2711e24 | 2014-12-04 16:43:28 +1100 | [diff] [blame] | 292 | /* |
| 293 | * We can test vc->runner without taking the vcore lock, |
| 294 | * because only this task ever sets vc->runner to this |
| 295 | * vcpu, and once it is set to this vcpu, only this task |
| 296 | * ever sets it to NULL. |
| 297 | */ |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 298 | if (vc->runner == vcpu && vc->vcore_state >= VCORE_SLEEPING) |
| 299 | kvmppc_core_end_stolen(vc); |
| 300 | |
Paul Mackerras | 2711e24 | 2014-12-04 16:43:28 +1100 | [diff] [blame] | 301 | spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags); |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 302 | if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST && |
| 303 | vcpu->arch.busy_preempt != TB_NIL) { |
| 304 | vcpu->arch.busy_stolen += mftb() - vcpu->arch.busy_preempt; |
| 305 | vcpu->arch.busy_preempt = TB_NIL; |
| 306 | } |
Paul Mackerras | bf3d32e | 2013-11-16 17:46:04 +1100 | [diff] [blame] | 307 | spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 308 | } |
| 309 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 310 | static void kvmppc_core_vcpu_put_hv(struct kvm_vcpu *vcpu) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 311 | { |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 312 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
Paul Mackerras | bf3d32e | 2013-11-16 17:46:04 +1100 | [diff] [blame] | 313 | unsigned long flags; |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 314 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 315 | if (vc->runner == vcpu && vc->vcore_state >= VCORE_SLEEPING) |
| 316 | kvmppc_core_start_stolen(vc); |
| 317 | |
Paul Mackerras | 2711e24 | 2014-12-04 16:43:28 +1100 | [diff] [blame] | 318 | spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags); |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 319 | if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST) |
| 320 | vcpu->arch.busy_preempt = mftb(); |
Paul Mackerras | bf3d32e | 2013-11-16 17:46:04 +1100 | [diff] [blame] | 321 | spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 322 | } |
| 323 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 324 | static void kvmppc_set_msr_hv(struct kvm_vcpu *vcpu, u64 msr) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 325 | { |
Paul Mackerras | c20875a | 2015-11-12 16:43:02 +1100 | [diff] [blame] | 326 | /* |
| 327 | * Check for illegal transactional state bit combination |
| 328 | * and if we find it, force the TS field to a safe state. |
| 329 | */ |
| 330 | if ((msr & MSR_TS_MASK) == MSR_TS_MASK) |
| 331 | msr &= ~MSR_TS_MASK; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 332 | vcpu->arch.shregs.msr = msr; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 333 | kvmppc_end_cede(vcpu); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 334 | } |
| 335 | |
Thomas Huth | 5358a96 | 2015-05-22 09:25:02 +0200 | [diff] [blame] | 336 | static void kvmppc_set_pvr_hv(struct kvm_vcpu *vcpu, u32 pvr) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 337 | { |
| 338 | vcpu->arch.pvr = pvr; |
| 339 | } |
| 340 | |
Suraj Jitindar Singh | 2ee13be3 | 2016-11-14 11:35:08 +1100 | [diff] [blame] | 341 | /* Dummy value used in computing PCR value below */ |
| 342 | #define PCR_ARCH_300 (PCR_ARCH_207 << 1) |
| 343 | |
Thomas Huth | 5358a96 | 2015-05-22 09:25:02 +0200 | [diff] [blame] | 344 | static int kvmppc_set_arch_compat(struct kvm_vcpu *vcpu, u32 arch_compat) |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 345 | { |
Suraj Jitindar Singh | 2ee13be3 | 2016-11-14 11:35:08 +1100 | [diff] [blame] | 346 | unsigned long host_pcr_bit = 0, guest_pcr_bit = 0; |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 347 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
| 348 | |
Suraj Jitindar Singh | 2ee13be3 | 2016-11-14 11:35:08 +1100 | [diff] [blame] | 349 | /* We can (emulate) our own architecture version and anything older */ |
| 350 | if (cpu_has_feature(CPU_FTR_ARCH_300)) |
| 351 | host_pcr_bit = PCR_ARCH_300; |
| 352 | else if (cpu_has_feature(CPU_FTR_ARCH_207S)) |
| 353 | host_pcr_bit = PCR_ARCH_207; |
| 354 | else if (cpu_has_feature(CPU_FTR_ARCH_206)) |
| 355 | host_pcr_bit = PCR_ARCH_206; |
| 356 | else |
| 357 | host_pcr_bit = PCR_ARCH_205; |
| 358 | |
| 359 | /* Determine lowest PCR bit needed to run guest in given PVR level */ |
| 360 | guest_pcr_bit = host_pcr_bit; |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 361 | if (arch_compat) { |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 362 | switch (arch_compat) { |
| 363 | case PVR_ARCH_205: |
Suraj Jitindar Singh | 2ee13be3 | 2016-11-14 11:35:08 +1100 | [diff] [blame] | 364 | guest_pcr_bit = PCR_ARCH_205; |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 365 | break; |
| 366 | case PVR_ARCH_206: |
| 367 | case PVR_ARCH_206p: |
Suraj Jitindar Singh | 2ee13be3 | 2016-11-14 11:35:08 +1100 | [diff] [blame] | 368 | guest_pcr_bit = PCR_ARCH_206; |
Paul Mackerras | 5557ae0 | 2014-01-08 21:25:24 +1100 | [diff] [blame] | 369 | break; |
| 370 | case PVR_ARCH_207: |
Suraj Jitindar Singh | 2ee13be3 | 2016-11-14 11:35:08 +1100 | [diff] [blame] | 371 | guest_pcr_bit = PCR_ARCH_207; |
| 372 | break; |
| 373 | case PVR_ARCH_300: |
| 374 | guest_pcr_bit = PCR_ARCH_300; |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 375 | break; |
| 376 | default: |
| 377 | return -EINVAL; |
| 378 | } |
| 379 | } |
| 380 | |
Suraj Jitindar Singh | 2ee13be3 | 2016-11-14 11:35:08 +1100 | [diff] [blame] | 381 | /* Check requested PCR bits don't exceed our capabilities */ |
| 382 | if (guest_pcr_bit > host_pcr_bit) |
| 383 | return -EINVAL; |
| 384 | |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 385 | spin_lock(&vc->lock); |
| 386 | vc->arch_compat = arch_compat; |
Suraj Jitindar Singh | 2ee13be3 | 2016-11-14 11:35:08 +1100 | [diff] [blame] | 387 | /* Set all PCR bits for which guest_pcr_bit <= bit < host_pcr_bit */ |
| 388 | vc->pcr = host_pcr_bit - guest_pcr_bit; |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 389 | spin_unlock(&vc->lock); |
| 390 | |
| 391 | return 0; |
| 392 | } |
| 393 | |
Thomas Huth | 5358a96 | 2015-05-22 09:25:02 +0200 | [diff] [blame] | 394 | static void kvmppc_dump_regs(struct kvm_vcpu *vcpu) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 395 | { |
| 396 | int r; |
| 397 | |
| 398 | pr_err("vcpu %p (%d):\n", vcpu, vcpu->vcpu_id); |
| 399 | pr_err("pc = %.16lx msr = %.16llx trap = %x\n", |
Simon Guo | 173c520 | 2018-05-07 14:20:08 +0800 | [diff] [blame] | 400 | vcpu->arch.regs.nip, vcpu->arch.shregs.msr, vcpu->arch.trap); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 401 | for (r = 0; r < 16; ++r) |
| 402 | pr_err("r%2d = %.16lx r%d = %.16lx\n", |
| 403 | r, kvmppc_get_gpr(vcpu, r), |
| 404 | r+16, kvmppc_get_gpr(vcpu, r+16)); |
| 405 | pr_err("ctr = %.16lx lr = %.16lx\n", |
Simon Guo | 173c520 | 2018-05-07 14:20:08 +0800 | [diff] [blame] | 406 | vcpu->arch.regs.ctr, vcpu->arch.regs.link); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 407 | pr_err("srr0 = %.16llx srr1 = %.16llx\n", |
| 408 | vcpu->arch.shregs.srr0, vcpu->arch.shregs.srr1); |
| 409 | pr_err("sprg0 = %.16llx sprg1 = %.16llx\n", |
| 410 | vcpu->arch.shregs.sprg0, vcpu->arch.shregs.sprg1); |
| 411 | pr_err("sprg2 = %.16llx sprg3 = %.16llx\n", |
| 412 | vcpu->arch.shregs.sprg2, vcpu->arch.shregs.sprg3); |
| 413 | pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n", |
Simon Guo | 173c520 | 2018-05-07 14:20:08 +0800 | [diff] [blame] | 414 | vcpu->arch.cr, vcpu->arch.regs.xer, vcpu->arch.shregs.dsisr); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 415 | pr_err("dar = %.16llx\n", vcpu->arch.shregs.dar); |
| 416 | pr_err("fault dar = %.16lx dsisr = %.8x\n", |
| 417 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); |
| 418 | pr_err("SLB (%d entries):\n", vcpu->arch.slb_max); |
| 419 | for (r = 0; r < vcpu->arch.slb_max; ++r) |
| 420 | pr_err(" ESID = %.16llx VSID = %.16llx\n", |
| 421 | vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv); |
| 422 | pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n", |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 423 | vcpu->arch.vcore->lpcr, vcpu->kvm->arch.sdr1, |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 424 | vcpu->arch.last_inst); |
| 425 | } |
| 426 | |
Thomas Huth | 5358a96 | 2015-05-22 09:25:02 +0200 | [diff] [blame] | 427 | static struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id) |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 428 | { |
David Hildenbrand | e09fefd | 2015-11-05 09:03:50 +0100 | [diff] [blame] | 429 | struct kvm_vcpu *ret; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 430 | |
| 431 | mutex_lock(&kvm->lock); |
David Hildenbrand | e09fefd | 2015-11-05 09:03:50 +0100 | [diff] [blame] | 432 | ret = kvm_get_vcpu_by_id(kvm, id); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 433 | mutex_unlock(&kvm->lock); |
| 434 | return ret; |
| 435 | } |
| 436 | |
| 437 | static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa) |
| 438 | { |
Anton Blanchard | f13c13a | 2013-08-07 02:01:26 +1000 | [diff] [blame] | 439 | vpa->__old_status |= LPPACA_OLD_SHARED_PROC; |
Alexander Graf | 0240755 | 2014-06-11 10:34:19 +0200 | [diff] [blame] | 440 | vpa->yield_count = cpu_to_be32(1); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 441 | } |
| 442 | |
Paul Mackerras | 55b665b | 2012-09-25 20:33:06 +0000 | [diff] [blame] | 443 | static int set_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *v, |
| 444 | unsigned long addr, unsigned long len) |
| 445 | { |
| 446 | /* check address is cacheline aligned */ |
| 447 | if (addr & (L1_CACHE_BYTES - 1)) |
| 448 | return -EINVAL; |
| 449 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 450 | if (v->next_gpa != addr || v->len != len) { |
| 451 | v->next_gpa = addr; |
| 452 | v->len = addr ? len : 0; |
| 453 | v->update_pending = 1; |
| 454 | } |
| 455 | spin_unlock(&vcpu->arch.vpa_update_lock); |
| 456 | return 0; |
| 457 | } |
| 458 | |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 459 | /* Length for a per-processor buffer is passed in at offset 4 in the buffer */ |
| 460 | struct reg_vpa { |
| 461 | u32 dummy; |
| 462 | union { |
Alexander Graf | 0240755 | 2014-06-11 10:34:19 +0200 | [diff] [blame] | 463 | __be16 hword; |
| 464 | __be32 word; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 465 | } length; |
| 466 | }; |
| 467 | |
| 468 | static int vpa_is_registered(struct kvmppc_vpa *vpap) |
| 469 | { |
| 470 | if (vpap->update_pending) |
| 471 | return vpap->next_gpa != 0; |
| 472 | return vpap->pinned_addr != NULL; |
| 473 | } |
| 474 | |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 475 | static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu, |
| 476 | unsigned long flags, |
| 477 | unsigned long vcpuid, unsigned long vpa) |
| 478 | { |
| 479 | struct kvm *kvm = vcpu->kvm; |
Paul Mackerras | 93e6024 | 2011-12-12 12:28:55 +0000 | [diff] [blame] | 480 | unsigned long len, nb; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 481 | void *va; |
| 482 | struct kvm_vcpu *tvcpu; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 483 | int err; |
| 484 | int subfunc; |
| 485 | struct kvmppc_vpa *vpap; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 486 | |
| 487 | tvcpu = kvmppc_find_vcpu(kvm, vcpuid); |
| 488 | if (!tvcpu) |
| 489 | return H_PARAMETER; |
| 490 | |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 491 | subfunc = (flags >> H_VPA_FUNC_SHIFT) & H_VPA_FUNC_MASK; |
| 492 | if (subfunc == H_VPA_REG_VPA || subfunc == H_VPA_REG_DTL || |
| 493 | subfunc == H_VPA_REG_SLB) { |
| 494 | /* Registering new area - address must be cache-line aligned */ |
| 495 | if ((vpa & (L1_CACHE_BYTES - 1)) || !vpa) |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 496 | return H_PARAMETER; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 497 | |
| 498 | /* convert logical addr to kernel addr and read length */ |
Paul Mackerras | 93e6024 | 2011-12-12 12:28:55 +0000 | [diff] [blame] | 499 | va = kvmppc_pin_guest_page(kvm, vpa, &nb); |
| 500 | if (va == NULL) |
Paul Mackerras | b2b2f16 | 2011-12-12 12:28:21 +0000 | [diff] [blame] | 501 | return H_PARAMETER; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 502 | if (subfunc == H_VPA_REG_VPA) |
Alexander Graf | 0240755 | 2014-06-11 10:34:19 +0200 | [diff] [blame] | 503 | len = be16_to_cpu(((struct reg_vpa *)va)->length.hword); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 504 | else |
Alexander Graf | 0240755 | 2014-06-11 10:34:19 +0200 | [diff] [blame] | 505 | len = be32_to_cpu(((struct reg_vpa *)va)->length.word); |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 506 | kvmppc_unpin_guest_page(kvm, va, vpa, false); |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 507 | |
| 508 | /* Check length */ |
| 509 | if (len > nb || len < sizeof(struct reg_vpa)) |
| 510 | return H_PARAMETER; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 511 | } else { |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 512 | vpa = 0; |
| 513 | len = 0; |
| 514 | } |
| 515 | |
| 516 | err = H_PARAMETER; |
| 517 | vpap = NULL; |
| 518 | spin_lock(&tvcpu->arch.vpa_update_lock); |
| 519 | |
| 520 | switch (subfunc) { |
| 521 | case H_VPA_REG_VPA: /* register VPA */ |
Nicholas Piggin | eaac112e | 2017-08-13 11:33:38 +1000 | [diff] [blame] | 522 | /* |
| 523 | * The size of our lppaca is 1kB because of the way we align |
| 524 | * it for the guest to avoid crossing a 4kB boundary. We only |
| 525 | * use 640 bytes of the structure though, so we should accept |
| 526 | * clients that set a size of 640. |
| 527 | */ |
Nicholas Piggin | 499dcd4 | 2018-02-14 01:08:13 +1000 | [diff] [blame] | 528 | BUILD_BUG_ON(sizeof(struct lppaca) != 640); |
| 529 | if (len < sizeof(struct lppaca)) |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 530 | break; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 531 | vpap = &tvcpu->arch.vpa; |
| 532 | err = 0; |
| 533 | break; |
| 534 | |
| 535 | case H_VPA_REG_DTL: /* register DTL */ |
| 536 | if (len < sizeof(struct dtl_entry)) |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 537 | break; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 538 | len -= len % sizeof(struct dtl_entry); |
| 539 | |
| 540 | /* Check that they have previously registered a VPA */ |
| 541 | err = H_RESOURCE; |
| 542 | if (!vpa_is_registered(&tvcpu->arch.vpa)) |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 543 | break; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 544 | |
| 545 | vpap = &tvcpu->arch.dtl; |
| 546 | err = 0; |
| 547 | break; |
| 548 | |
| 549 | case H_VPA_REG_SLB: /* register SLB shadow buffer */ |
| 550 | /* Check that they have previously registered a VPA */ |
| 551 | err = H_RESOURCE; |
| 552 | if (!vpa_is_registered(&tvcpu->arch.vpa)) |
| 553 | break; |
| 554 | |
| 555 | vpap = &tvcpu->arch.slb_shadow; |
| 556 | err = 0; |
| 557 | break; |
| 558 | |
| 559 | case H_VPA_DEREG_VPA: /* deregister VPA */ |
| 560 | /* Check they don't still have a DTL or SLB buf registered */ |
| 561 | err = H_RESOURCE; |
| 562 | if (vpa_is_registered(&tvcpu->arch.dtl) || |
| 563 | vpa_is_registered(&tvcpu->arch.slb_shadow)) |
| 564 | break; |
| 565 | |
| 566 | vpap = &tvcpu->arch.vpa; |
| 567 | err = 0; |
| 568 | break; |
| 569 | |
| 570 | case H_VPA_DEREG_DTL: /* deregister DTL */ |
| 571 | vpap = &tvcpu->arch.dtl; |
| 572 | err = 0; |
| 573 | break; |
| 574 | |
| 575 | case H_VPA_DEREG_SLB: /* deregister SLB shadow buffer */ |
| 576 | vpap = &tvcpu->arch.slb_shadow; |
| 577 | err = 0; |
| 578 | break; |
| 579 | } |
| 580 | |
| 581 | if (vpap) { |
| 582 | vpap->next_gpa = vpa; |
| 583 | vpap->len = len; |
| 584 | vpap->update_pending = 1; |
| 585 | } |
| 586 | |
| 587 | spin_unlock(&tvcpu->arch.vpa_update_lock); |
| 588 | |
| 589 | return err; |
| 590 | } |
| 591 | |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 592 | static void kvmppc_update_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *vpap) |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 593 | { |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 594 | struct kvm *kvm = vcpu->kvm; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 595 | void *va; |
| 596 | unsigned long nb; |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 597 | unsigned long gpa; |
| 598 | |
| 599 | /* |
| 600 | * We need to pin the page pointed to by vpap->next_gpa, |
| 601 | * but we can't call kvmppc_pin_guest_page under the lock |
| 602 | * as it does get_user_pages() and down_read(). So we |
| 603 | * have to drop the lock, pin the page, then get the lock |
| 604 | * again and check that a new area didn't get registered |
| 605 | * in the meantime. |
| 606 | */ |
| 607 | for (;;) { |
| 608 | gpa = vpap->next_gpa; |
| 609 | spin_unlock(&vcpu->arch.vpa_update_lock); |
| 610 | va = NULL; |
| 611 | nb = 0; |
| 612 | if (gpa) |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 613 | va = kvmppc_pin_guest_page(kvm, gpa, &nb); |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 614 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 615 | if (gpa == vpap->next_gpa) |
| 616 | break; |
| 617 | /* sigh... unpin that one and try again */ |
| 618 | if (va) |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 619 | kvmppc_unpin_guest_page(kvm, va, gpa, false); |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 620 | } |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 621 | |
| 622 | vpap->update_pending = 0; |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 623 | if (va && nb < vpap->len) { |
| 624 | /* |
| 625 | * If it's now too short, it must be that userspace |
| 626 | * has changed the mappings underlying guest memory, |
| 627 | * so unregister the region. |
| 628 | */ |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 629 | kvmppc_unpin_guest_page(kvm, va, gpa, false); |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 630 | va = NULL; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 631 | } |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 632 | if (vpap->pinned_addr) |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 633 | kvmppc_unpin_guest_page(kvm, vpap->pinned_addr, vpap->gpa, |
| 634 | vpap->dirty); |
| 635 | vpap->gpa = gpa; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 636 | vpap->pinned_addr = va; |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 637 | vpap->dirty = false; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 638 | if (va) |
| 639 | vpap->pinned_end = va + vpap->len; |
| 640 | } |
Paul Mackerras | 93e6024 | 2011-12-12 12:28:55 +0000 | [diff] [blame] | 641 | |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 642 | static void kvmppc_update_vpas(struct kvm_vcpu *vcpu) |
| 643 | { |
Paul Mackerras | 2f12f03 | 2012-10-15 01:17:17 +0000 | [diff] [blame] | 644 | if (!(vcpu->arch.vpa.update_pending || |
| 645 | vcpu->arch.slb_shadow.update_pending || |
| 646 | vcpu->arch.dtl.update_pending)) |
| 647 | return; |
| 648 | |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 649 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 650 | if (vcpu->arch.vpa.update_pending) { |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 651 | kvmppc_update_vpa(vcpu, &vcpu->arch.vpa); |
Paul Mackerras | 55b665b | 2012-09-25 20:33:06 +0000 | [diff] [blame] | 652 | if (vcpu->arch.vpa.pinned_addr) |
| 653 | init_vpa(vcpu, vcpu->arch.vpa.pinned_addr); |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 654 | } |
| 655 | if (vcpu->arch.dtl.update_pending) { |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 656 | kvmppc_update_vpa(vcpu, &vcpu->arch.dtl); |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 657 | vcpu->arch.dtl_ptr = vcpu->arch.dtl.pinned_addr; |
| 658 | vcpu->arch.dtl_index = 0; |
| 659 | } |
| 660 | if (vcpu->arch.slb_shadow.update_pending) |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 661 | kvmppc_update_vpa(vcpu, &vcpu->arch.slb_shadow); |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 662 | spin_unlock(&vcpu->arch.vpa_update_lock); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 663 | } |
| 664 | |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 665 | /* |
| 666 | * Return the accumulated stolen time for the vcore up until `now'. |
| 667 | * The caller should hold the vcore lock. |
| 668 | */ |
| 669 | static u64 vcore_stolen_time(struct kvmppc_vcore *vc, u64 now) |
| 670 | { |
| 671 | u64 p; |
Paul Mackerras | 2711e24 | 2014-12-04 16:43:28 +1100 | [diff] [blame] | 672 | unsigned long flags; |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 673 | |
Paul Mackerras | 2711e24 | 2014-12-04 16:43:28 +1100 | [diff] [blame] | 674 | spin_lock_irqsave(&vc->stoltb_lock, flags); |
| 675 | p = vc->stolen_tb; |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 676 | if (vc->vcore_state != VCORE_INACTIVE && |
Paul Mackerras | 2711e24 | 2014-12-04 16:43:28 +1100 | [diff] [blame] | 677 | vc->preempt_tb != TB_NIL) |
| 678 | p += now - vc->preempt_tb; |
| 679 | spin_unlock_irqrestore(&vc->stoltb_lock, flags); |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 680 | return p; |
| 681 | } |
| 682 | |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 683 | static void kvmppc_create_dtl_entry(struct kvm_vcpu *vcpu, |
| 684 | struct kvmppc_vcore *vc) |
| 685 | { |
| 686 | struct dtl_entry *dt; |
| 687 | struct lppaca *vpa; |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 688 | unsigned long stolen; |
| 689 | unsigned long core_stolen; |
| 690 | u64 now; |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 691 | unsigned long flags; |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 692 | |
| 693 | dt = vcpu->arch.dtl_ptr; |
| 694 | vpa = vcpu->arch.vpa.pinned_addr; |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 695 | now = mftb(); |
| 696 | core_stolen = vcore_stolen_time(vc, now); |
| 697 | stolen = core_stolen - vcpu->arch.stolen_logged; |
| 698 | vcpu->arch.stolen_logged = core_stolen; |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 699 | spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags); |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 700 | stolen += vcpu->arch.busy_stolen; |
| 701 | vcpu->arch.busy_stolen = 0; |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 702 | spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags); |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 703 | if (!dt || !vpa) |
| 704 | return; |
| 705 | memset(dt, 0, sizeof(struct dtl_entry)); |
| 706 | dt->dispatch_reason = 7; |
Alexander Graf | 0240755 | 2014-06-11 10:34:19 +0200 | [diff] [blame] | 707 | dt->processor_id = cpu_to_be16(vc->pcpu + vcpu->arch.ptid); |
| 708 | dt->timebase = cpu_to_be64(now + vc->tb_offset); |
| 709 | dt->enqueue_to_dispatch_time = cpu_to_be32(stolen); |
| 710 | dt->srr0 = cpu_to_be64(kvmppc_get_pc(vcpu)); |
| 711 | dt->srr1 = cpu_to_be64(vcpu->arch.shregs.msr); |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 712 | ++dt; |
| 713 | if (dt == vcpu->arch.dtl.pinned_end) |
| 714 | dt = vcpu->arch.dtl.pinned_addr; |
| 715 | vcpu->arch.dtl_ptr = dt; |
| 716 | /* order writing *dt vs. writing vpa->dtl_idx */ |
| 717 | smp_wmb(); |
Alexander Graf | 0240755 | 2014-06-11 10:34:19 +0200 | [diff] [blame] | 718 | vpa->dtl_idx = cpu_to_be64(++vcpu->arch.dtl_index); |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 719 | vcpu->arch.dtl.dirty = true; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 720 | } |
| 721 | |
Paul Mackerras | 1da4e2f | 2017-05-19 16:26:16 +1000 | [diff] [blame] | 722 | /* See if there is a doorbell interrupt pending for a vcpu */ |
| 723 | static bool kvmppc_doorbell_pending(struct kvm_vcpu *vcpu) |
| 724 | { |
| 725 | int thr; |
| 726 | struct kvmppc_vcore *vc; |
| 727 | |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 728 | if (vcpu->arch.doorbell_request) |
| 729 | return true; |
| 730 | /* |
| 731 | * Ensure that the read of vcore->dpdes comes after the read |
| 732 | * of vcpu->doorbell_request. This barrier matches the |
| 733 | * lwsync in book3s_hv_rmhandlers.S just before the |
| 734 | * fast_guest_return label. |
| 735 | */ |
| 736 | smp_rmb(); |
Paul Mackerras | 1da4e2f | 2017-05-19 16:26:16 +1000 | [diff] [blame] | 737 | vc = vcpu->arch.vcore; |
| 738 | thr = vcpu->vcpu_id - vc->first_vcpuid; |
| 739 | return !!(vc->dpdes & (1 << thr)); |
| 740 | } |
| 741 | |
Michael Neuling | 9642382 | 2014-06-02 11:03:01 +1000 | [diff] [blame] | 742 | static bool kvmppc_power8_compatible(struct kvm_vcpu *vcpu) |
| 743 | { |
| 744 | if (vcpu->arch.vcore->arch_compat >= PVR_ARCH_207) |
| 745 | return true; |
| 746 | if ((!vcpu->arch.vcore->arch_compat) && |
| 747 | cpu_has_feature(CPU_FTR_ARCH_207S)) |
| 748 | return true; |
| 749 | return false; |
| 750 | } |
| 751 | |
| 752 | static int kvmppc_h_set_mode(struct kvm_vcpu *vcpu, unsigned long mflags, |
| 753 | unsigned long resource, unsigned long value1, |
| 754 | unsigned long value2) |
| 755 | { |
| 756 | switch (resource) { |
| 757 | case H_SET_MODE_RESOURCE_SET_CIABR: |
| 758 | if (!kvmppc_power8_compatible(vcpu)) |
| 759 | return H_P2; |
| 760 | if (value2) |
| 761 | return H_P4; |
| 762 | if (mflags) |
| 763 | return H_UNSUPPORTED_FLAG_START; |
| 764 | /* Guests can't breakpoint the hypervisor */ |
| 765 | if ((value1 & CIABR_PRIV) == CIABR_PRIV_HYPER) |
| 766 | return H_P3; |
| 767 | vcpu->arch.ciabr = value1; |
| 768 | return H_SUCCESS; |
| 769 | case H_SET_MODE_RESOURCE_SET_DAWR: |
| 770 | if (!kvmppc_power8_compatible(vcpu)) |
| 771 | return H_P2; |
Michael Neuling | 398e712 | 2018-03-27 15:37:20 +1100 | [diff] [blame] | 772 | if (!ppc_breakpoint_available()) |
| 773 | return H_P2; |
Michael Neuling | 9642382 | 2014-06-02 11:03:01 +1000 | [diff] [blame] | 774 | if (mflags) |
| 775 | return H_UNSUPPORTED_FLAG_START; |
| 776 | if (value2 & DABRX_HYP) |
| 777 | return H_P4; |
| 778 | vcpu->arch.dawr = value1; |
| 779 | vcpu->arch.dawrx = value2; |
| 780 | return H_SUCCESS; |
| 781 | default: |
| 782 | return H_TOO_HARD; |
| 783 | } |
| 784 | } |
| 785 | |
Sam Bobroff | 90fd09f | 2014-12-03 13:30:40 +1100 | [diff] [blame] | 786 | static int kvm_arch_vcpu_yield_to(struct kvm_vcpu *target) |
| 787 | { |
| 788 | struct kvmppc_vcore *vcore = target->arch.vcore; |
| 789 | |
| 790 | /* |
| 791 | * We expect to have been called by the real mode handler |
| 792 | * (kvmppc_rm_h_confer()) which would have directly returned |
| 793 | * H_SUCCESS if the source vcore wasn't idle (e.g. if it may |
| 794 | * have useful work to do and should not confer) so we don't |
| 795 | * recheck that here. |
| 796 | */ |
| 797 | |
| 798 | spin_lock(&vcore->lock); |
| 799 | if (target->arch.state == KVMPPC_VCPU_RUNNABLE && |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 800 | vcore->vcore_state != VCORE_INACTIVE && |
| 801 | vcore->runner) |
Sam Bobroff | 90fd09f | 2014-12-03 13:30:40 +1100 | [diff] [blame] | 802 | target = vcore->runner; |
| 803 | spin_unlock(&vcore->lock); |
| 804 | |
| 805 | return kvm_vcpu_yield_to(target); |
| 806 | } |
| 807 | |
| 808 | static int kvmppc_get_yield_count(struct kvm_vcpu *vcpu) |
| 809 | { |
| 810 | int yield_count = 0; |
| 811 | struct lppaca *lppaca; |
| 812 | |
| 813 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 814 | lppaca = (struct lppaca *)vcpu->arch.vpa.pinned_addr; |
| 815 | if (lppaca) |
Paul Mackerras | ecb6d61 | 2015-03-20 20:39:39 +1100 | [diff] [blame] | 816 | yield_count = be32_to_cpu(lppaca->yield_count); |
Sam Bobroff | 90fd09f | 2014-12-03 13:30:40 +1100 | [diff] [blame] | 817 | spin_unlock(&vcpu->arch.vpa_update_lock); |
| 818 | return yield_count; |
| 819 | } |
| 820 | |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 821 | int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) |
| 822 | { |
| 823 | unsigned long req = kvmppc_get_gpr(vcpu, 3); |
| 824 | unsigned long target, ret = H_SUCCESS; |
Sam Bobroff | 90fd09f | 2014-12-03 13:30:40 +1100 | [diff] [blame] | 825 | int yield_count; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 826 | struct kvm_vcpu *tvcpu; |
Michael Ellerman | 8e591cb | 2013-04-17 20:30:00 +0000 | [diff] [blame] | 827 | int idx, rc; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 828 | |
Paul Mackerras | 699a0ea | 2014-06-02 11:02:59 +1000 | [diff] [blame] | 829 | if (req <= MAX_HCALL_OPCODE && |
| 830 | !test_bit(req/4, vcpu->kvm->arch.enabled_hcalls)) |
| 831 | return RESUME_HOST; |
| 832 | |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 833 | switch (req) { |
| 834 | case H_CEDE: |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 835 | break; |
| 836 | case H_PROD: |
| 837 | target = kvmppc_get_gpr(vcpu, 4); |
| 838 | tvcpu = kvmppc_find_vcpu(vcpu->kvm, target); |
| 839 | if (!tvcpu) { |
| 840 | ret = H_PARAMETER; |
| 841 | break; |
| 842 | } |
| 843 | tvcpu->arch.prodded = 1; |
| 844 | smp_mb(); |
Paul Mackerras | 8464c88 | 2016-12-06 20:42:05 +1100 | [diff] [blame] | 845 | if (tvcpu->arch.ceded) |
| 846 | kvmppc_fast_vcpu_kick_hv(tvcpu); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 847 | break; |
| 848 | case H_CONFER: |
Paul Mackerras | 42d7604 | 2013-09-06 13:23:21 +1000 | [diff] [blame] | 849 | target = kvmppc_get_gpr(vcpu, 4); |
| 850 | if (target == -1) |
| 851 | break; |
| 852 | tvcpu = kvmppc_find_vcpu(vcpu->kvm, target); |
| 853 | if (!tvcpu) { |
| 854 | ret = H_PARAMETER; |
| 855 | break; |
| 856 | } |
Sam Bobroff | 90fd09f | 2014-12-03 13:30:40 +1100 | [diff] [blame] | 857 | yield_count = kvmppc_get_gpr(vcpu, 5); |
| 858 | if (kvmppc_get_yield_count(tvcpu) != yield_count) |
| 859 | break; |
| 860 | kvm_arch_vcpu_yield_to(tvcpu); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 861 | break; |
| 862 | case H_REGISTER_VPA: |
| 863 | ret = do_h_register_vpa(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 864 | kvmppc_get_gpr(vcpu, 5), |
| 865 | kvmppc_get_gpr(vcpu, 6)); |
| 866 | break; |
Michael Ellerman | 8e591cb | 2013-04-17 20:30:00 +0000 | [diff] [blame] | 867 | case H_RTAS: |
| 868 | if (list_empty(&vcpu->kvm->arch.rtas_tokens)) |
| 869 | return RESUME_HOST; |
| 870 | |
Paul Mackerras | c943809 | 2013-11-16 17:46:05 +1100 | [diff] [blame] | 871 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
Michael Ellerman | 8e591cb | 2013-04-17 20:30:00 +0000 | [diff] [blame] | 872 | rc = kvmppc_rtas_hcall(vcpu); |
Paul Mackerras | c943809 | 2013-11-16 17:46:05 +1100 | [diff] [blame] | 873 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
Michael Ellerman | 8e591cb | 2013-04-17 20:30:00 +0000 | [diff] [blame] | 874 | |
| 875 | if (rc == -ENOENT) |
| 876 | return RESUME_HOST; |
| 877 | else if (rc == 0) |
| 878 | break; |
| 879 | |
| 880 | /* Send the error out to userspace via KVM_RUN */ |
| 881 | return rc; |
David Gibson | 99342cf8 | 2015-02-05 11:53:25 +1100 | [diff] [blame] | 882 | case H_LOGICAL_CI_LOAD: |
| 883 | ret = kvmppc_h_logical_ci_load(vcpu); |
| 884 | if (ret == H_TOO_HARD) |
| 885 | return RESUME_HOST; |
| 886 | break; |
| 887 | case H_LOGICAL_CI_STORE: |
| 888 | ret = kvmppc_h_logical_ci_store(vcpu); |
| 889 | if (ret == H_TOO_HARD) |
| 890 | return RESUME_HOST; |
| 891 | break; |
Michael Neuling | 9642382 | 2014-06-02 11:03:01 +1000 | [diff] [blame] | 892 | case H_SET_MODE: |
| 893 | ret = kvmppc_h_set_mode(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 894 | kvmppc_get_gpr(vcpu, 5), |
| 895 | kvmppc_get_gpr(vcpu, 6), |
| 896 | kvmppc_get_gpr(vcpu, 7)); |
| 897 | if (ret == H_TOO_HARD) |
| 898 | return RESUME_HOST; |
| 899 | break; |
Benjamin Herrenschmidt | bc5ad3f | 2013-04-17 20:30:26 +0000 | [diff] [blame] | 900 | case H_XIRR: |
| 901 | case H_CPPR: |
| 902 | case H_EOI: |
| 903 | case H_IPI: |
Paul Mackerras | 8e44ddc | 2013-05-23 15:42:21 +0000 | [diff] [blame] | 904 | case H_IPOLL: |
| 905 | case H_XIRR_X: |
Benjamin Herrenschmidt | bc5ad3f | 2013-04-17 20:30:26 +0000 | [diff] [blame] | 906 | if (kvmppc_xics_enabled(vcpu)) { |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 907 | if (xive_enabled()) { |
| 908 | ret = H_NOT_AVAILABLE; |
| 909 | return RESUME_GUEST; |
| 910 | } |
Benjamin Herrenschmidt | bc5ad3f | 2013-04-17 20:30:26 +0000 | [diff] [blame] | 911 | ret = kvmppc_xics_hcall(vcpu, req); |
| 912 | break; |
Alexey Kardashevskiy | d3695aa | 2016-02-15 12:55:09 +1100 | [diff] [blame] | 913 | } |
| 914 | return RESUME_HOST; |
| 915 | case H_PUT_TCE: |
| 916 | ret = kvmppc_h_put_tce(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 917 | kvmppc_get_gpr(vcpu, 5), |
| 918 | kvmppc_get_gpr(vcpu, 6)); |
| 919 | if (ret == H_TOO_HARD) |
| 920 | return RESUME_HOST; |
| 921 | break; |
| 922 | case H_PUT_TCE_INDIRECT: |
| 923 | ret = kvmppc_h_put_tce_indirect(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 924 | kvmppc_get_gpr(vcpu, 5), |
| 925 | kvmppc_get_gpr(vcpu, 6), |
| 926 | kvmppc_get_gpr(vcpu, 7)); |
| 927 | if (ret == H_TOO_HARD) |
| 928 | return RESUME_HOST; |
| 929 | break; |
| 930 | case H_STUFF_TCE: |
| 931 | ret = kvmppc_h_stuff_tce(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 932 | kvmppc_get_gpr(vcpu, 5), |
| 933 | kvmppc_get_gpr(vcpu, 6), |
| 934 | kvmppc_get_gpr(vcpu, 7)); |
| 935 | if (ret == H_TOO_HARD) |
| 936 | return RESUME_HOST; |
| 937 | break; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 938 | default: |
| 939 | return RESUME_HOST; |
| 940 | } |
| 941 | kvmppc_set_gpr(vcpu, 3, ret); |
| 942 | vcpu->arch.hcall_needed = 0; |
| 943 | return RESUME_GUEST; |
| 944 | } |
| 945 | |
Paul Mackerras | ae2113a | 2014-06-02 11:03:00 +1000 | [diff] [blame] | 946 | static int kvmppc_hcall_impl_hv(unsigned long cmd) |
| 947 | { |
| 948 | switch (cmd) { |
| 949 | case H_CEDE: |
| 950 | case H_PROD: |
| 951 | case H_CONFER: |
| 952 | case H_REGISTER_VPA: |
Michael Neuling | 9642382 | 2014-06-02 11:03:01 +1000 | [diff] [blame] | 953 | case H_SET_MODE: |
David Gibson | 99342cf8 | 2015-02-05 11:53:25 +1100 | [diff] [blame] | 954 | case H_LOGICAL_CI_LOAD: |
| 955 | case H_LOGICAL_CI_STORE: |
Paul Mackerras | ae2113a | 2014-06-02 11:03:00 +1000 | [diff] [blame] | 956 | #ifdef CONFIG_KVM_XICS |
| 957 | case H_XIRR: |
| 958 | case H_CPPR: |
| 959 | case H_EOI: |
| 960 | case H_IPI: |
| 961 | case H_IPOLL: |
| 962 | case H_XIRR_X: |
| 963 | #endif |
| 964 | return 1; |
| 965 | } |
| 966 | |
| 967 | /* See if it's in the real-mode table */ |
| 968 | return kvmppc_hcall_impl_hv_realmode(cmd); |
| 969 | } |
| 970 | |
Madhavan Srinivasan | a59c1d9 | 2014-09-09 22:37:35 +0530 | [diff] [blame] | 971 | static int kvmppc_emulate_debug_inst(struct kvm_run *run, |
| 972 | struct kvm_vcpu *vcpu) |
| 973 | { |
| 974 | u32 last_inst; |
| 975 | |
| 976 | if (kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst) != |
| 977 | EMULATE_DONE) { |
| 978 | /* |
| 979 | * Fetch failed, so return to guest and |
| 980 | * try executing it again. |
| 981 | */ |
| 982 | return RESUME_GUEST; |
| 983 | } |
| 984 | |
| 985 | if (last_inst == KVMPPC_INST_SW_BREAKPOINT) { |
| 986 | run->exit_reason = KVM_EXIT_DEBUG; |
| 987 | run->debug.arch.address = kvmppc_get_pc(vcpu); |
| 988 | return RESUME_HOST; |
| 989 | } else { |
| 990 | kvmppc_core_queue_program(vcpu, SRR1_PROGILL); |
| 991 | return RESUME_GUEST; |
| 992 | } |
| 993 | } |
| 994 | |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 995 | static void do_nothing(void *x) |
| 996 | { |
| 997 | } |
| 998 | |
| 999 | static unsigned long kvmppc_read_dpdes(struct kvm_vcpu *vcpu) |
| 1000 | { |
| 1001 | int thr, cpu, pcpu, nthreads; |
| 1002 | struct kvm_vcpu *v; |
| 1003 | unsigned long dpdes; |
| 1004 | |
| 1005 | nthreads = vcpu->kvm->arch.emul_smt_mode; |
| 1006 | dpdes = 0; |
| 1007 | cpu = vcpu->vcpu_id & ~(nthreads - 1); |
| 1008 | for (thr = 0; thr < nthreads; ++thr, ++cpu) { |
| 1009 | v = kvmppc_find_vcpu(vcpu->kvm, cpu); |
| 1010 | if (!v) |
| 1011 | continue; |
| 1012 | /* |
| 1013 | * If the vcpu is currently running on a physical cpu thread, |
| 1014 | * interrupt it in order to pull it out of the guest briefly, |
| 1015 | * which will update its vcore->dpdes value. |
| 1016 | */ |
| 1017 | pcpu = READ_ONCE(v->cpu); |
| 1018 | if (pcpu >= 0) |
| 1019 | smp_call_function_single(pcpu, do_nothing, NULL, 1); |
| 1020 | if (kvmppc_doorbell_pending(v)) |
| 1021 | dpdes |= 1 << thr; |
| 1022 | } |
| 1023 | return dpdes; |
| 1024 | } |
| 1025 | |
| 1026 | /* |
| 1027 | * On POWER9, emulate doorbell-related instructions in order to |
| 1028 | * give the guest the illusion of running on a multi-threaded core. |
| 1029 | * The instructions emulated are msgsndp, msgclrp, mfspr TIR, |
| 1030 | * and mfspr DPDES. |
| 1031 | */ |
| 1032 | static int kvmppc_emulate_doorbell_instr(struct kvm_vcpu *vcpu) |
| 1033 | { |
| 1034 | u32 inst, rb, thr; |
| 1035 | unsigned long arg; |
| 1036 | struct kvm *kvm = vcpu->kvm; |
| 1037 | struct kvm_vcpu *tvcpu; |
| 1038 | |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 1039 | if (kvmppc_get_last_inst(vcpu, INST_GENERIC, &inst) != EMULATE_DONE) |
| 1040 | return RESUME_GUEST; |
| 1041 | if (get_op(inst) != 31) |
| 1042 | return EMULATE_FAIL; |
| 1043 | rb = get_rb(inst); |
| 1044 | thr = vcpu->vcpu_id & (kvm->arch.emul_smt_mode - 1); |
| 1045 | switch (get_xop(inst)) { |
| 1046 | case OP_31_XOP_MSGSNDP: |
| 1047 | arg = kvmppc_get_gpr(vcpu, rb); |
| 1048 | if (((arg >> 27) & 0xf) != PPC_DBELL_SERVER) |
| 1049 | break; |
| 1050 | arg &= 0x3f; |
| 1051 | if (arg >= kvm->arch.emul_smt_mode) |
| 1052 | break; |
| 1053 | tvcpu = kvmppc_find_vcpu(kvm, vcpu->vcpu_id - thr + arg); |
| 1054 | if (!tvcpu) |
| 1055 | break; |
| 1056 | if (!tvcpu->arch.doorbell_request) { |
| 1057 | tvcpu->arch.doorbell_request = 1; |
| 1058 | kvmppc_fast_vcpu_kick_hv(tvcpu); |
| 1059 | } |
| 1060 | break; |
| 1061 | case OP_31_XOP_MSGCLRP: |
| 1062 | arg = kvmppc_get_gpr(vcpu, rb); |
| 1063 | if (((arg >> 27) & 0xf) != PPC_DBELL_SERVER) |
| 1064 | break; |
| 1065 | vcpu->arch.vcore->dpdes = 0; |
| 1066 | vcpu->arch.doorbell_request = 0; |
| 1067 | break; |
| 1068 | case OP_31_XOP_MFSPR: |
| 1069 | switch (get_sprn(inst)) { |
| 1070 | case SPRN_TIR: |
| 1071 | arg = thr; |
| 1072 | break; |
| 1073 | case SPRN_DPDES: |
| 1074 | arg = kvmppc_read_dpdes(vcpu); |
| 1075 | break; |
| 1076 | default: |
| 1077 | return EMULATE_FAIL; |
| 1078 | } |
| 1079 | kvmppc_set_gpr(vcpu, get_rt(inst), arg); |
| 1080 | break; |
| 1081 | default: |
| 1082 | return EMULATE_FAIL; |
| 1083 | } |
| 1084 | kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) + 4); |
| 1085 | return RESUME_GUEST; |
| 1086 | } |
| 1087 | |
Paul Mackerras | 36ee41d | 2018-01-30 10:51:32 +1100 | [diff] [blame] | 1088 | /* Called with vcpu->arch.vcore->lock held */ |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 1089 | static int kvmppc_handle_exit_hv(struct kvm_run *run, struct kvm_vcpu *vcpu, |
| 1090 | struct task_struct *tsk) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1091 | { |
| 1092 | int r = RESUME_HOST; |
| 1093 | |
| 1094 | vcpu->stat.sum_exits++; |
| 1095 | |
Paul Mackerras | 1c9e3d5 | 2015-11-12 16:43:48 +1100 | [diff] [blame] | 1096 | /* |
| 1097 | * This can happen if an interrupt occurs in the last stages |
| 1098 | * of guest entry or the first stages of guest exit (i.e. after |
| 1099 | * setting paca->kvm_hstate.in_guest to KVM_GUEST_MODE_GUEST_HV |
| 1100 | * and before setting it to KVM_GUEST_MODE_HOST_HV). |
| 1101 | * That can happen due to a bug, or due to a machine check |
| 1102 | * occurring at just the wrong time. |
| 1103 | */ |
| 1104 | if (vcpu->arch.shregs.msr & MSR_HV) { |
| 1105 | printk(KERN_EMERG "KVM trap in HV mode!\n"); |
| 1106 | printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n", |
| 1107 | vcpu->arch.trap, kvmppc_get_pc(vcpu), |
| 1108 | vcpu->arch.shregs.msr); |
| 1109 | kvmppc_dump_regs(vcpu); |
| 1110 | run->exit_reason = KVM_EXIT_INTERNAL_ERROR; |
| 1111 | run->hw.hardware_exit_reason = vcpu->arch.trap; |
| 1112 | return RESUME_HOST; |
| 1113 | } |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1114 | run->exit_reason = KVM_EXIT_UNKNOWN; |
| 1115 | run->ready_for_interrupt_injection = 1; |
| 1116 | switch (vcpu->arch.trap) { |
| 1117 | /* We're good on these - the host merely wanted to get our attention */ |
| 1118 | case BOOK3S_INTERRUPT_HV_DECREMENTER: |
| 1119 | vcpu->stat.dec_exits++; |
| 1120 | r = RESUME_GUEST; |
| 1121 | break; |
| 1122 | case BOOK3S_INTERRUPT_EXTERNAL: |
Paul Mackerras | 5d00f66 | 2014-01-08 21:25:28 +1100 | [diff] [blame] | 1123 | case BOOK3S_INTERRUPT_H_DOORBELL: |
Paul Mackerras | 84f7139 | 2016-11-22 14:30:14 +1100 | [diff] [blame] | 1124 | case BOOK3S_INTERRUPT_H_VIRT: |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1125 | vcpu->stat.ext_intr_exits++; |
| 1126 | r = RESUME_GUEST; |
| 1127 | break; |
Nicholas Piggin | 6de6638 | 2017-11-05 23:33:55 +1100 | [diff] [blame] | 1128 | /* SR/HMI/PMI are HV interrupts that host has handled. Resume guest.*/ |
Mahesh Salgaonkar | dee6f24 | 2014-11-03 15:51:57 +1100 | [diff] [blame] | 1129 | case BOOK3S_INTERRUPT_HMI: |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1130 | case BOOK3S_INTERRUPT_PERFMON: |
Nicholas Piggin | 6de6638 | 2017-11-05 23:33:55 +1100 | [diff] [blame] | 1131 | case BOOK3S_INTERRUPT_SYSTEM_RESET: |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1132 | r = RESUME_GUEST; |
| 1133 | break; |
Paul Mackerras | b4072df | 2012-11-23 22:37:50 +0000 | [diff] [blame] | 1134 | case BOOK3S_INTERRUPT_MACHINE_CHECK: |
Aravinda Prasad | e20bbd3 | 2017-05-11 16:33:37 +0530 | [diff] [blame] | 1135 | /* Exit to guest with KVM_EXIT_NMI as exit reason */ |
| 1136 | run->exit_reason = KVM_EXIT_NMI; |
| 1137 | run->hw.hardware_exit_reason = vcpu->arch.trap; |
| 1138 | /* Clear out the old NMI status from run->flags */ |
| 1139 | run->flags &= ~KVM_RUN_PPC_NMI_DISP_MASK; |
| 1140 | /* Now set the NMI status */ |
| 1141 | if (vcpu->arch.mce_evt.disposition == MCE_DISPOSITION_RECOVERED) |
| 1142 | run->flags |= KVM_RUN_PPC_NMI_DISP_FULLY_RECOV; |
| 1143 | else |
| 1144 | run->flags |= KVM_RUN_PPC_NMI_DISP_NOT_RECOV; |
| 1145 | |
| 1146 | r = RESUME_HOST; |
| 1147 | /* Print the MCE event to host console. */ |
| 1148 | machine_check_print_event_info(&vcpu->arch.mce_evt, false); |
Paul Mackerras | b4072df | 2012-11-23 22:37:50 +0000 | [diff] [blame] | 1149 | break; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1150 | case BOOK3S_INTERRUPT_PROGRAM: |
| 1151 | { |
| 1152 | ulong flags; |
| 1153 | /* |
| 1154 | * Normally program interrupts are delivered directly |
| 1155 | * to the guest by the hardware, but we can get here |
| 1156 | * as a result of a hypervisor emulation interrupt |
| 1157 | * (e40) getting turned into a 700 by BML RTAS. |
| 1158 | */ |
| 1159 | flags = vcpu->arch.shregs.msr & 0x1f0000ull; |
| 1160 | kvmppc_core_queue_program(vcpu, flags); |
| 1161 | r = RESUME_GUEST; |
| 1162 | break; |
| 1163 | } |
| 1164 | case BOOK3S_INTERRUPT_SYSCALL: |
| 1165 | { |
| 1166 | /* hcall - punt to userspace */ |
| 1167 | int i; |
| 1168 | |
Liu Ping Fan | 27025a6 | 2013-11-19 14:12:48 +0800 | [diff] [blame] | 1169 | /* hypercall with MSR_PR has already been handled in rmode, |
| 1170 | * and never reaches here. |
| 1171 | */ |
| 1172 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1173 | run->papr_hcall.nr = kvmppc_get_gpr(vcpu, 3); |
| 1174 | for (i = 0; i < 9; ++i) |
| 1175 | run->papr_hcall.args[i] = kvmppc_get_gpr(vcpu, 4 + i); |
| 1176 | run->exit_reason = KVM_EXIT_PAPR_HCALL; |
| 1177 | vcpu->arch.hcall_needed = 1; |
| 1178 | r = RESUME_HOST; |
| 1179 | break; |
| 1180 | } |
| 1181 | /* |
Paul Mackerras | 342d3db | 2011-12-12 12:38:05 +0000 | [diff] [blame] | 1182 | * We get these next two if the guest accesses a page which it thinks |
| 1183 | * it has mapped but which is not actually present, either because |
| 1184 | * it is for an emulated I/O device or because the corresonding |
| 1185 | * host page has been paged out. Any other HDSI/HISI interrupts |
| 1186 | * have been handled already. |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1187 | */ |
| 1188 | case BOOK3S_INTERRUPT_H_DATA_STORAGE: |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 1189 | r = RESUME_PAGE_FAULT; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1190 | break; |
| 1191 | case BOOK3S_INTERRUPT_H_INST_STORAGE: |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 1192 | vcpu->arch.fault_dar = kvmppc_get_pc(vcpu); |
| 1193 | vcpu->arch.fault_dsisr = 0; |
| 1194 | r = RESUME_PAGE_FAULT; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1195 | break; |
| 1196 | /* |
| 1197 | * This occurs if the guest executes an illegal instruction. |
Madhavan Srinivasan | a59c1d9 | 2014-09-09 22:37:35 +0530 | [diff] [blame] | 1198 | * If the guest debug is disabled, generate a program interrupt |
| 1199 | * to the guest. If guest debug is enabled, we need to check |
| 1200 | * whether the instruction is a software breakpoint instruction. |
| 1201 | * Accordingly return to Guest or Host. |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1202 | */ |
| 1203 | case BOOK3S_INTERRUPT_H_EMUL_ASSIST: |
Paul Mackerras | 4a157d6 | 2014-12-03 13:30:39 +1100 | [diff] [blame] | 1204 | if (vcpu->arch.emul_inst != KVM_INST_FETCH_FAILED) |
| 1205 | vcpu->arch.last_inst = kvmppc_need_byteswap(vcpu) ? |
| 1206 | swab32(vcpu->arch.emul_inst) : |
| 1207 | vcpu->arch.emul_inst; |
Madhavan Srinivasan | a59c1d9 | 2014-09-09 22:37:35 +0530 | [diff] [blame] | 1208 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) { |
Paul Mackerras | 36ee41d | 2018-01-30 10:51:32 +1100 | [diff] [blame] | 1209 | /* Need vcore unlocked to call kvmppc_get_last_inst */ |
| 1210 | spin_unlock(&vcpu->arch.vcore->lock); |
Madhavan Srinivasan | a59c1d9 | 2014-09-09 22:37:35 +0530 | [diff] [blame] | 1211 | r = kvmppc_emulate_debug_inst(run, vcpu); |
Paul Mackerras | 36ee41d | 2018-01-30 10:51:32 +1100 | [diff] [blame] | 1212 | spin_lock(&vcpu->arch.vcore->lock); |
Madhavan Srinivasan | a59c1d9 | 2014-09-09 22:37:35 +0530 | [diff] [blame] | 1213 | } else { |
| 1214 | kvmppc_core_queue_program(vcpu, SRR1_PROGILL); |
| 1215 | r = RESUME_GUEST; |
| 1216 | } |
Michael Ellerman | bd3048b | 2014-01-08 21:25:23 +1100 | [diff] [blame] | 1217 | break; |
| 1218 | /* |
| 1219 | * This occurs if the guest (kernel or userspace), does something that |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 1220 | * is prohibited by HFSCR. |
| 1221 | * On POWER9, this could be a doorbell instruction that we need |
| 1222 | * to emulate. |
| 1223 | * Otherwise, we just generate a program interrupt to the guest. |
Michael Ellerman | bd3048b | 2014-01-08 21:25:23 +1100 | [diff] [blame] | 1224 | */ |
| 1225 | case BOOK3S_INTERRUPT_H_FAC_UNAVAIL: |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 1226 | r = EMULATE_FAIL; |
Paul Mackerras | 36ee41d | 2018-01-30 10:51:32 +1100 | [diff] [blame] | 1227 | if (((vcpu->arch.hfscr >> 56) == FSCR_MSGP_LG) && |
| 1228 | cpu_has_feature(CPU_FTR_ARCH_300)) { |
| 1229 | /* Need vcore unlocked to call kvmppc_get_last_inst */ |
| 1230 | spin_unlock(&vcpu->arch.vcore->lock); |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 1231 | r = kvmppc_emulate_doorbell_instr(vcpu); |
Paul Mackerras | 36ee41d | 2018-01-30 10:51:32 +1100 | [diff] [blame] | 1232 | spin_lock(&vcpu->arch.vcore->lock); |
| 1233 | } |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 1234 | if (r == EMULATE_FAIL) { |
| 1235 | kvmppc_core_queue_program(vcpu, SRR1_PROGILL); |
| 1236 | r = RESUME_GUEST; |
| 1237 | } |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1238 | break; |
Paul Mackerras | 4bb3c7a | 2018-03-21 21:32:01 +1100 | [diff] [blame] | 1239 | |
| 1240 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
| 1241 | case BOOK3S_INTERRUPT_HV_SOFTPATCH: |
| 1242 | /* |
| 1243 | * This occurs for various TM-related instructions that |
| 1244 | * we need to emulate on POWER9 DD2.2. We have already |
| 1245 | * handled the cases where the guest was in real-suspend |
| 1246 | * mode and was transitioning to transactional state. |
| 1247 | */ |
| 1248 | r = kvmhv_p9_tm_emulation(vcpu); |
| 1249 | break; |
| 1250 | #endif |
| 1251 | |
Suresh Warrier | f7af520 | 2016-08-19 15:35:52 +1000 | [diff] [blame] | 1252 | case BOOK3S_INTERRUPT_HV_RM_HARD: |
| 1253 | r = RESUME_PASSTHROUGH; |
| 1254 | break; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1255 | default: |
| 1256 | kvmppc_dump_regs(vcpu); |
| 1257 | printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n", |
| 1258 | vcpu->arch.trap, kvmppc_get_pc(vcpu), |
| 1259 | vcpu->arch.shregs.msr); |
Paul Mackerras | f3271d4 | 2013-09-20 14:52:41 +1000 | [diff] [blame] | 1260 | run->hw.hardware_exit_reason = vcpu->arch.trap; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1261 | r = RESUME_HOST; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1262 | break; |
| 1263 | } |
| 1264 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1265 | return r; |
| 1266 | } |
| 1267 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 1268 | static int kvm_arch_vcpu_ioctl_get_sregs_hv(struct kvm_vcpu *vcpu, |
| 1269 | struct kvm_sregs *sregs) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1270 | { |
| 1271 | int i; |
| 1272 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1273 | memset(sregs, 0, sizeof(struct kvm_sregs)); |
Aneesh Kumar K.V | 8791644 | 2013-08-22 17:08:39 +0530 | [diff] [blame] | 1274 | sregs->pvr = vcpu->arch.pvr; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1275 | for (i = 0; i < vcpu->arch.slb_max; i++) { |
| 1276 | sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige; |
| 1277 | sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv; |
| 1278 | } |
| 1279 | |
| 1280 | return 0; |
| 1281 | } |
| 1282 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 1283 | static int kvm_arch_vcpu_ioctl_set_sregs_hv(struct kvm_vcpu *vcpu, |
| 1284 | struct kvm_sregs *sregs) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1285 | { |
| 1286 | int i, j; |
| 1287 | |
Paul Mackerras | 9333e6c | 2014-09-02 16:14:43 +1000 | [diff] [blame] | 1288 | /* Only accept the same PVR as the host's, since we can't spoof it */ |
| 1289 | if (sregs->pvr != vcpu->arch.pvr) |
| 1290 | return -EINVAL; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1291 | |
| 1292 | j = 0; |
| 1293 | for (i = 0; i < vcpu->arch.slb_nr; i++) { |
| 1294 | if (sregs->u.s.ppc64.slb[i].slbe & SLB_ESID_V) { |
| 1295 | vcpu->arch.slb[j].orige = sregs->u.s.ppc64.slb[i].slbe; |
| 1296 | vcpu->arch.slb[j].origv = sregs->u.s.ppc64.slb[i].slbv; |
| 1297 | ++j; |
| 1298 | } |
| 1299 | } |
| 1300 | vcpu->arch.slb_max = j; |
| 1301 | |
| 1302 | return 0; |
| 1303 | } |
| 1304 | |
Alexey Kardashevskiy | a084024 | 2014-07-19 17:59:34 +1000 | [diff] [blame] | 1305 | static void kvmppc_set_lpcr(struct kvm_vcpu *vcpu, u64 new_lpcr, |
| 1306 | bool preserve_top32) |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 1307 | { |
Paul Mackerras | 8f902b0 | 2015-03-20 20:39:38 +1100 | [diff] [blame] | 1308 | struct kvm *kvm = vcpu->kvm; |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 1309 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
| 1310 | u64 mask; |
| 1311 | |
Paul Mackerras | 8f902b0 | 2015-03-20 20:39:38 +1100 | [diff] [blame] | 1312 | mutex_lock(&kvm->lock); |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 1313 | spin_lock(&vc->lock); |
| 1314 | /* |
Anton Blanchard | d682916 | 2014-01-08 21:25:30 +1100 | [diff] [blame] | 1315 | * If ILE (interrupt little-endian) has changed, update the |
| 1316 | * MSR_LE bit in the intr_msr for each vcpu in this vcore. |
| 1317 | */ |
| 1318 | if ((new_lpcr & LPCR_ILE) != (vc->lpcr & LPCR_ILE)) { |
Anton Blanchard | d682916 | 2014-01-08 21:25:30 +1100 | [diff] [blame] | 1319 | struct kvm_vcpu *vcpu; |
| 1320 | int i; |
| 1321 | |
Anton Blanchard | d682916 | 2014-01-08 21:25:30 +1100 | [diff] [blame] | 1322 | kvm_for_each_vcpu(i, vcpu, kvm) { |
| 1323 | if (vcpu->arch.vcore != vc) |
| 1324 | continue; |
| 1325 | if (new_lpcr & LPCR_ILE) |
| 1326 | vcpu->arch.intr_msr |= MSR_LE; |
| 1327 | else |
| 1328 | vcpu->arch.intr_msr &= ~MSR_LE; |
| 1329 | } |
Anton Blanchard | d682916 | 2014-01-08 21:25:30 +1100 | [diff] [blame] | 1330 | } |
| 1331 | |
| 1332 | /* |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 1333 | * Userspace can only modify DPFD (default prefetch depth), |
| 1334 | * ILE (interrupt little-endian) and TC (translation control). |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 1335 | * On POWER8 and POWER9 userspace can also modify AIL (alt. interrupt loc.). |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 1336 | */ |
| 1337 | mask = LPCR_DPFD | LPCR_ILE | LPCR_TC; |
Paul Mackerras | e0622bd | 2014-01-08 21:25:27 +1100 | [diff] [blame] | 1338 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) |
| 1339 | mask |= LPCR_AIL; |
Paul Mackerras | 1bc3fe8 | 2017-05-22 16:55:16 +1000 | [diff] [blame] | 1340 | /* |
| 1341 | * On POWER9, allow userspace to enable large decrementer for the |
| 1342 | * guest, whether or not the host has it enabled. |
| 1343 | */ |
| 1344 | if (cpu_has_feature(CPU_FTR_ARCH_300)) |
| 1345 | mask |= LPCR_LD; |
Alexey Kardashevskiy | a084024 | 2014-07-19 17:59:34 +1000 | [diff] [blame] | 1346 | |
| 1347 | /* Broken 32-bit version of LPCR must not clear top bits */ |
| 1348 | if (preserve_top32) |
| 1349 | mask &= 0xFFFFFFFF; |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 1350 | vc->lpcr = (vc->lpcr & ~mask) | (new_lpcr & mask); |
| 1351 | spin_unlock(&vc->lock); |
Paul Mackerras | 8f902b0 | 2015-03-20 20:39:38 +1100 | [diff] [blame] | 1352 | mutex_unlock(&kvm->lock); |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 1353 | } |
| 1354 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 1355 | static int kvmppc_get_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, |
| 1356 | union kvmppc_one_reg *val) |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 1357 | { |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 1358 | int r = 0; |
| 1359 | long int i; |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 1360 | |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 1361 | switch (id) { |
Madhavan Srinivasan | a59c1d9 | 2014-09-09 22:37:35 +0530 | [diff] [blame] | 1362 | case KVM_REG_PPC_DEBUG_INST: |
| 1363 | *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT); |
| 1364 | break; |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 1365 | case KVM_REG_PPC_HIOR: |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 1366 | *val = get_reg_val(id, 0); |
| 1367 | break; |
| 1368 | case KVM_REG_PPC_DABR: |
| 1369 | *val = get_reg_val(id, vcpu->arch.dabr); |
| 1370 | break; |
Paul Mackerras | 8563bf5 | 2014-01-08 21:25:29 +1100 | [diff] [blame] | 1371 | case KVM_REG_PPC_DABRX: |
| 1372 | *val = get_reg_val(id, vcpu->arch.dabrx); |
| 1373 | break; |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 1374 | case KVM_REG_PPC_DSCR: |
| 1375 | *val = get_reg_val(id, vcpu->arch.dscr); |
| 1376 | break; |
| 1377 | case KVM_REG_PPC_PURR: |
| 1378 | *val = get_reg_val(id, vcpu->arch.purr); |
| 1379 | break; |
| 1380 | case KVM_REG_PPC_SPURR: |
| 1381 | *val = get_reg_val(id, vcpu->arch.spurr); |
| 1382 | break; |
| 1383 | case KVM_REG_PPC_AMR: |
| 1384 | *val = get_reg_val(id, vcpu->arch.amr); |
| 1385 | break; |
| 1386 | case KVM_REG_PPC_UAMOR: |
| 1387 | *val = get_reg_val(id, vcpu->arch.uamor); |
| 1388 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 1389 | case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRS: |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 1390 | i = id - KVM_REG_PPC_MMCR0; |
| 1391 | *val = get_reg_val(id, vcpu->arch.mmcr[i]); |
| 1392 | break; |
| 1393 | case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8: |
| 1394 | i = id - KVM_REG_PPC_PMC1; |
| 1395 | *val = get_reg_val(id, vcpu->arch.pmc[i]); |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 1396 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 1397 | case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2: |
| 1398 | i = id - KVM_REG_PPC_SPMC1; |
| 1399 | *val = get_reg_val(id, vcpu->arch.spmc[i]); |
| 1400 | break; |
Paul Mackerras | 1494178 | 2013-09-06 13:11:18 +1000 | [diff] [blame] | 1401 | case KVM_REG_PPC_SIAR: |
| 1402 | *val = get_reg_val(id, vcpu->arch.siar); |
| 1403 | break; |
| 1404 | case KVM_REG_PPC_SDAR: |
| 1405 | *val = get_reg_val(id, vcpu->arch.sdar); |
| 1406 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 1407 | case KVM_REG_PPC_SIER: |
| 1408 | *val = get_reg_val(id, vcpu->arch.sier); |
Paul Mackerras | a8bd19e | 2012-09-25 20:32:30 +0000 | [diff] [blame] | 1409 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 1410 | case KVM_REG_PPC_IAMR: |
| 1411 | *val = get_reg_val(id, vcpu->arch.iamr); |
Paul Mackerras | a8bd19e | 2012-09-25 20:32:30 +0000 | [diff] [blame] | 1412 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 1413 | case KVM_REG_PPC_PSPB: |
| 1414 | *val = get_reg_val(id, vcpu->arch.pspb); |
| 1415 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 1416 | case KVM_REG_PPC_DPDES: |
| 1417 | *val = get_reg_val(id, vcpu->arch.vcore->dpdes); |
| 1418 | break; |
Paul Mackerras | 88b02cf9 | 2016-09-15 13:42:52 +1000 | [diff] [blame] | 1419 | case KVM_REG_PPC_VTB: |
| 1420 | *val = get_reg_val(id, vcpu->arch.vcore->vtb); |
| 1421 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 1422 | case KVM_REG_PPC_DAWR: |
| 1423 | *val = get_reg_val(id, vcpu->arch.dawr); |
| 1424 | break; |
| 1425 | case KVM_REG_PPC_DAWRX: |
| 1426 | *val = get_reg_val(id, vcpu->arch.dawrx); |
| 1427 | break; |
| 1428 | case KVM_REG_PPC_CIABR: |
| 1429 | *val = get_reg_val(id, vcpu->arch.ciabr); |
| 1430 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 1431 | case KVM_REG_PPC_CSIGR: |
| 1432 | *val = get_reg_val(id, vcpu->arch.csigr); |
| 1433 | break; |
| 1434 | case KVM_REG_PPC_TACR: |
| 1435 | *val = get_reg_val(id, vcpu->arch.tacr); |
| 1436 | break; |
| 1437 | case KVM_REG_PPC_TCSCR: |
| 1438 | *val = get_reg_val(id, vcpu->arch.tcscr); |
| 1439 | break; |
| 1440 | case KVM_REG_PPC_PID: |
| 1441 | *val = get_reg_val(id, vcpu->arch.pid); |
| 1442 | break; |
| 1443 | case KVM_REG_PPC_ACOP: |
| 1444 | *val = get_reg_val(id, vcpu->arch.acop); |
| 1445 | break; |
| 1446 | case KVM_REG_PPC_WORT: |
| 1447 | *val = get_reg_val(id, vcpu->arch.wort); |
| 1448 | break; |
Paul Mackerras | e9cf1e0 | 2016-11-18 13:11:42 +1100 | [diff] [blame] | 1449 | case KVM_REG_PPC_TIDR: |
| 1450 | *val = get_reg_val(id, vcpu->arch.tid); |
| 1451 | break; |
| 1452 | case KVM_REG_PPC_PSSCR: |
| 1453 | *val = get_reg_val(id, vcpu->arch.psscr); |
| 1454 | break; |
Paul Mackerras | 55b665b | 2012-09-25 20:33:06 +0000 | [diff] [blame] | 1455 | case KVM_REG_PPC_VPA_ADDR: |
| 1456 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 1457 | *val = get_reg_val(id, vcpu->arch.vpa.next_gpa); |
| 1458 | spin_unlock(&vcpu->arch.vpa_update_lock); |
| 1459 | break; |
| 1460 | case KVM_REG_PPC_VPA_SLB: |
| 1461 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 1462 | val->vpaval.addr = vcpu->arch.slb_shadow.next_gpa; |
| 1463 | val->vpaval.length = vcpu->arch.slb_shadow.len; |
| 1464 | spin_unlock(&vcpu->arch.vpa_update_lock); |
| 1465 | break; |
| 1466 | case KVM_REG_PPC_VPA_DTL: |
| 1467 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 1468 | val->vpaval.addr = vcpu->arch.dtl.next_gpa; |
| 1469 | val->vpaval.length = vcpu->arch.dtl.len; |
| 1470 | spin_unlock(&vcpu->arch.vpa_update_lock); |
| 1471 | break; |
Paul Mackerras | 93b0f4d | 2013-09-06 13:17:46 +1000 | [diff] [blame] | 1472 | case KVM_REG_PPC_TB_OFFSET: |
| 1473 | *val = get_reg_val(id, vcpu->arch.vcore->tb_offset); |
| 1474 | break; |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 1475 | case KVM_REG_PPC_LPCR: |
Alexey Kardashevskiy | a084024 | 2014-07-19 17:59:34 +1000 | [diff] [blame] | 1476 | case KVM_REG_PPC_LPCR_64: |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 1477 | *val = get_reg_val(id, vcpu->arch.vcore->lpcr); |
| 1478 | break; |
Paul Mackerras | 4b8473c | 2013-09-20 14:52:39 +1000 | [diff] [blame] | 1479 | case KVM_REG_PPC_PPR: |
| 1480 | *val = get_reg_val(id, vcpu->arch.ppr); |
| 1481 | break; |
Michael Neuling | a7d80d0 | 2014-03-25 10:47:03 +1100 | [diff] [blame] | 1482 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
| 1483 | case KVM_REG_PPC_TFHAR: |
| 1484 | *val = get_reg_val(id, vcpu->arch.tfhar); |
| 1485 | break; |
| 1486 | case KVM_REG_PPC_TFIAR: |
| 1487 | *val = get_reg_val(id, vcpu->arch.tfiar); |
| 1488 | break; |
| 1489 | case KVM_REG_PPC_TEXASR: |
| 1490 | *val = get_reg_val(id, vcpu->arch.texasr); |
| 1491 | break; |
| 1492 | case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31: |
| 1493 | i = id - KVM_REG_PPC_TM_GPR0; |
| 1494 | *val = get_reg_val(id, vcpu->arch.gpr_tm[i]); |
| 1495 | break; |
| 1496 | case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63: |
| 1497 | { |
| 1498 | int j; |
| 1499 | i = id - KVM_REG_PPC_TM_VSR0; |
| 1500 | if (i < 32) |
| 1501 | for (j = 0; j < TS_FPRWIDTH; j++) |
| 1502 | val->vsxval[j] = vcpu->arch.fp_tm.fpr[i][j]; |
| 1503 | else { |
| 1504 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) |
| 1505 | val->vval = vcpu->arch.vr_tm.vr[i-32]; |
| 1506 | else |
| 1507 | r = -ENXIO; |
| 1508 | } |
| 1509 | break; |
| 1510 | } |
| 1511 | case KVM_REG_PPC_TM_CR: |
| 1512 | *val = get_reg_val(id, vcpu->arch.cr_tm); |
| 1513 | break; |
Paul Mackerras | 0d808df | 2016-11-07 15:09:58 +1100 | [diff] [blame] | 1514 | case KVM_REG_PPC_TM_XER: |
| 1515 | *val = get_reg_val(id, vcpu->arch.xer_tm); |
| 1516 | break; |
Michael Neuling | a7d80d0 | 2014-03-25 10:47:03 +1100 | [diff] [blame] | 1517 | case KVM_REG_PPC_TM_LR: |
| 1518 | *val = get_reg_val(id, vcpu->arch.lr_tm); |
| 1519 | break; |
| 1520 | case KVM_REG_PPC_TM_CTR: |
| 1521 | *val = get_reg_val(id, vcpu->arch.ctr_tm); |
| 1522 | break; |
| 1523 | case KVM_REG_PPC_TM_FPSCR: |
| 1524 | *val = get_reg_val(id, vcpu->arch.fp_tm.fpscr); |
| 1525 | break; |
| 1526 | case KVM_REG_PPC_TM_AMR: |
| 1527 | *val = get_reg_val(id, vcpu->arch.amr_tm); |
| 1528 | break; |
| 1529 | case KVM_REG_PPC_TM_PPR: |
| 1530 | *val = get_reg_val(id, vcpu->arch.ppr_tm); |
| 1531 | break; |
| 1532 | case KVM_REG_PPC_TM_VRSAVE: |
| 1533 | *val = get_reg_val(id, vcpu->arch.vrsave_tm); |
| 1534 | break; |
| 1535 | case KVM_REG_PPC_TM_VSCR: |
| 1536 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) |
| 1537 | *val = get_reg_val(id, vcpu->arch.vr_tm.vscr.u[3]); |
| 1538 | else |
| 1539 | r = -ENXIO; |
| 1540 | break; |
| 1541 | case KVM_REG_PPC_TM_DSCR: |
| 1542 | *val = get_reg_val(id, vcpu->arch.dscr_tm); |
| 1543 | break; |
| 1544 | case KVM_REG_PPC_TM_TAR: |
| 1545 | *val = get_reg_val(id, vcpu->arch.tar_tm); |
| 1546 | break; |
| 1547 | #endif |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 1548 | case KVM_REG_PPC_ARCH_COMPAT: |
| 1549 | *val = get_reg_val(id, vcpu->arch.vcore->arch_compat); |
| 1550 | break; |
Paul Mackerras | 5855564 | 2018-01-12 20:55:20 +1100 | [diff] [blame] | 1551 | case KVM_REG_PPC_DEC_EXPIRY: |
| 1552 | *val = get_reg_val(id, vcpu->arch.dec_expires + |
| 1553 | vcpu->arch.vcore->tb_offset); |
| 1554 | break; |
Paul Mackerras | a1f1582 | 2018-04-20 15:33:21 +1000 | [diff] [blame] | 1555 | case KVM_REG_PPC_ONLINE: |
| 1556 | *val = get_reg_val(id, vcpu->arch.online); |
| 1557 | break; |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 1558 | default: |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 1559 | r = -EINVAL; |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 1560 | break; |
| 1561 | } |
| 1562 | |
| 1563 | return r; |
| 1564 | } |
| 1565 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 1566 | static int kvmppc_set_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, |
| 1567 | union kvmppc_one_reg *val) |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 1568 | { |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 1569 | int r = 0; |
| 1570 | long int i; |
Paul Mackerras | 55b665b | 2012-09-25 20:33:06 +0000 | [diff] [blame] | 1571 | unsigned long addr, len; |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 1572 | |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 1573 | switch (id) { |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 1574 | case KVM_REG_PPC_HIOR: |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 1575 | /* Only allow this to be set to zero */ |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 1576 | if (set_reg_val(id, *val)) |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 1577 | r = -EINVAL; |
| 1578 | break; |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 1579 | case KVM_REG_PPC_DABR: |
| 1580 | vcpu->arch.dabr = set_reg_val(id, *val); |
| 1581 | break; |
Paul Mackerras | 8563bf5 | 2014-01-08 21:25:29 +1100 | [diff] [blame] | 1582 | case KVM_REG_PPC_DABRX: |
| 1583 | vcpu->arch.dabrx = set_reg_val(id, *val) & ~DABRX_HYP; |
| 1584 | break; |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 1585 | case KVM_REG_PPC_DSCR: |
| 1586 | vcpu->arch.dscr = set_reg_val(id, *val); |
| 1587 | break; |
| 1588 | case KVM_REG_PPC_PURR: |
| 1589 | vcpu->arch.purr = set_reg_val(id, *val); |
| 1590 | break; |
| 1591 | case KVM_REG_PPC_SPURR: |
| 1592 | vcpu->arch.spurr = set_reg_val(id, *val); |
| 1593 | break; |
| 1594 | case KVM_REG_PPC_AMR: |
| 1595 | vcpu->arch.amr = set_reg_val(id, *val); |
| 1596 | break; |
| 1597 | case KVM_REG_PPC_UAMOR: |
| 1598 | vcpu->arch.uamor = set_reg_val(id, *val); |
| 1599 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 1600 | case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRS: |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 1601 | i = id - KVM_REG_PPC_MMCR0; |
| 1602 | vcpu->arch.mmcr[i] = set_reg_val(id, *val); |
| 1603 | break; |
| 1604 | case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8: |
| 1605 | i = id - KVM_REG_PPC_PMC1; |
| 1606 | vcpu->arch.pmc[i] = set_reg_val(id, *val); |
| 1607 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 1608 | case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2: |
| 1609 | i = id - KVM_REG_PPC_SPMC1; |
| 1610 | vcpu->arch.spmc[i] = set_reg_val(id, *val); |
| 1611 | break; |
Paul Mackerras | 1494178 | 2013-09-06 13:11:18 +1000 | [diff] [blame] | 1612 | case KVM_REG_PPC_SIAR: |
| 1613 | vcpu->arch.siar = set_reg_val(id, *val); |
| 1614 | break; |
| 1615 | case KVM_REG_PPC_SDAR: |
| 1616 | vcpu->arch.sdar = set_reg_val(id, *val); |
| 1617 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 1618 | case KVM_REG_PPC_SIER: |
| 1619 | vcpu->arch.sier = set_reg_val(id, *val); |
Paul Mackerras | a8bd19e | 2012-09-25 20:32:30 +0000 | [diff] [blame] | 1620 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 1621 | case KVM_REG_PPC_IAMR: |
| 1622 | vcpu->arch.iamr = set_reg_val(id, *val); |
Paul Mackerras | a8bd19e | 2012-09-25 20:32:30 +0000 | [diff] [blame] | 1623 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 1624 | case KVM_REG_PPC_PSPB: |
| 1625 | vcpu->arch.pspb = set_reg_val(id, *val); |
| 1626 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 1627 | case KVM_REG_PPC_DPDES: |
| 1628 | vcpu->arch.vcore->dpdes = set_reg_val(id, *val); |
| 1629 | break; |
Paul Mackerras | 88b02cf9 | 2016-09-15 13:42:52 +1000 | [diff] [blame] | 1630 | case KVM_REG_PPC_VTB: |
| 1631 | vcpu->arch.vcore->vtb = set_reg_val(id, *val); |
| 1632 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 1633 | case KVM_REG_PPC_DAWR: |
| 1634 | vcpu->arch.dawr = set_reg_val(id, *val); |
| 1635 | break; |
| 1636 | case KVM_REG_PPC_DAWRX: |
| 1637 | vcpu->arch.dawrx = set_reg_val(id, *val) & ~DAWRX_HYP; |
| 1638 | break; |
| 1639 | case KVM_REG_PPC_CIABR: |
| 1640 | vcpu->arch.ciabr = set_reg_val(id, *val); |
| 1641 | /* Don't allow setting breakpoints in hypervisor code */ |
| 1642 | if ((vcpu->arch.ciabr & CIABR_PRIV) == CIABR_PRIV_HYPER) |
| 1643 | vcpu->arch.ciabr &= ~CIABR_PRIV; /* disable */ |
| 1644 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 1645 | case KVM_REG_PPC_CSIGR: |
| 1646 | vcpu->arch.csigr = set_reg_val(id, *val); |
| 1647 | break; |
| 1648 | case KVM_REG_PPC_TACR: |
| 1649 | vcpu->arch.tacr = set_reg_val(id, *val); |
| 1650 | break; |
| 1651 | case KVM_REG_PPC_TCSCR: |
| 1652 | vcpu->arch.tcscr = set_reg_val(id, *val); |
| 1653 | break; |
| 1654 | case KVM_REG_PPC_PID: |
| 1655 | vcpu->arch.pid = set_reg_val(id, *val); |
| 1656 | break; |
| 1657 | case KVM_REG_PPC_ACOP: |
| 1658 | vcpu->arch.acop = set_reg_val(id, *val); |
| 1659 | break; |
| 1660 | case KVM_REG_PPC_WORT: |
| 1661 | vcpu->arch.wort = set_reg_val(id, *val); |
| 1662 | break; |
Paul Mackerras | e9cf1e0 | 2016-11-18 13:11:42 +1100 | [diff] [blame] | 1663 | case KVM_REG_PPC_TIDR: |
| 1664 | vcpu->arch.tid = set_reg_val(id, *val); |
| 1665 | break; |
| 1666 | case KVM_REG_PPC_PSSCR: |
| 1667 | vcpu->arch.psscr = set_reg_val(id, *val) & PSSCR_GUEST_VIS; |
| 1668 | break; |
Paul Mackerras | 55b665b | 2012-09-25 20:33:06 +0000 | [diff] [blame] | 1669 | case KVM_REG_PPC_VPA_ADDR: |
| 1670 | addr = set_reg_val(id, *val); |
| 1671 | r = -EINVAL; |
| 1672 | if (!addr && (vcpu->arch.slb_shadow.next_gpa || |
| 1673 | vcpu->arch.dtl.next_gpa)) |
| 1674 | break; |
| 1675 | r = set_vpa(vcpu, &vcpu->arch.vpa, addr, sizeof(struct lppaca)); |
| 1676 | break; |
| 1677 | case KVM_REG_PPC_VPA_SLB: |
| 1678 | addr = val->vpaval.addr; |
| 1679 | len = val->vpaval.length; |
| 1680 | r = -EINVAL; |
| 1681 | if (addr && !vcpu->arch.vpa.next_gpa) |
| 1682 | break; |
| 1683 | r = set_vpa(vcpu, &vcpu->arch.slb_shadow, addr, len); |
| 1684 | break; |
| 1685 | case KVM_REG_PPC_VPA_DTL: |
| 1686 | addr = val->vpaval.addr; |
| 1687 | len = val->vpaval.length; |
| 1688 | r = -EINVAL; |
Paul Mackerras | 9f8c8c7 | 2012-10-15 01:18:37 +0000 | [diff] [blame] | 1689 | if (addr && (len < sizeof(struct dtl_entry) || |
| 1690 | !vcpu->arch.vpa.next_gpa)) |
Paul Mackerras | 55b665b | 2012-09-25 20:33:06 +0000 | [diff] [blame] | 1691 | break; |
| 1692 | len -= len % sizeof(struct dtl_entry); |
| 1693 | r = set_vpa(vcpu, &vcpu->arch.dtl, addr, len); |
| 1694 | break; |
Paul Mackerras | 93b0f4d | 2013-09-06 13:17:46 +1000 | [diff] [blame] | 1695 | case KVM_REG_PPC_TB_OFFSET: |
Paul Mackerras | 3d3efb6 | 2017-06-06 14:35:30 +1000 | [diff] [blame] | 1696 | /* |
| 1697 | * POWER9 DD1 has an erratum where writing TBU40 causes |
| 1698 | * the timebase to lose ticks. So we don't let the |
| 1699 | * timebase offset be changed on P9 DD1. (It is |
| 1700 | * initialized to zero.) |
| 1701 | */ |
| 1702 | if (cpu_has_feature(CPU_FTR_POWER9_DD1)) |
| 1703 | break; |
Paul Mackerras | 93b0f4d | 2013-09-06 13:17:46 +1000 | [diff] [blame] | 1704 | /* round up to multiple of 2^24 */ |
| 1705 | vcpu->arch.vcore->tb_offset = |
| 1706 | ALIGN(set_reg_val(id, *val), 1UL << 24); |
| 1707 | break; |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 1708 | case KVM_REG_PPC_LPCR: |
Alexey Kardashevskiy | a084024 | 2014-07-19 17:59:34 +1000 | [diff] [blame] | 1709 | kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), true); |
| 1710 | break; |
| 1711 | case KVM_REG_PPC_LPCR_64: |
| 1712 | kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), false); |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 1713 | break; |
Paul Mackerras | 4b8473c | 2013-09-20 14:52:39 +1000 | [diff] [blame] | 1714 | case KVM_REG_PPC_PPR: |
| 1715 | vcpu->arch.ppr = set_reg_val(id, *val); |
| 1716 | break; |
Michael Neuling | a7d80d0 | 2014-03-25 10:47:03 +1100 | [diff] [blame] | 1717 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
| 1718 | case KVM_REG_PPC_TFHAR: |
| 1719 | vcpu->arch.tfhar = set_reg_val(id, *val); |
| 1720 | break; |
| 1721 | case KVM_REG_PPC_TFIAR: |
| 1722 | vcpu->arch.tfiar = set_reg_val(id, *val); |
| 1723 | break; |
| 1724 | case KVM_REG_PPC_TEXASR: |
| 1725 | vcpu->arch.texasr = set_reg_val(id, *val); |
| 1726 | break; |
| 1727 | case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31: |
| 1728 | i = id - KVM_REG_PPC_TM_GPR0; |
| 1729 | vcpu->arch.gpr_tm[i] = set_reg_val(id, *val); |
| 1730 | break; |
| 1731 | case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63: |
| 1732 | { |
| 1733 | int j; |
| 1734 | i = id - KVM_REG_PPC_TM_VSR0; |
| 1735 | if (i < 32) |
| 1736 | for (j = 0; j < TS_FPRWIDTH; j++) |
| 1737 | vcpu->arch.fp_tm.fpr[i][j] = val->vsxval[j]; |
| 1738 | else |
| 1739 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) |
| 1740 | vcpu->arch.vr_tm.vr[i-32] = val->vval; |
| 1741 | else |
| 1742 | r = -ENXIO; |
| 1743 | break; |
| 1744 | } |
| 1745 | case KVM_REG_PPC_TM_CR: |
| 1746 | vcpu->arch.cr_tm = set_reg_val(id, *val); |
| 1747 | break; |
Paul Mackerras | 0d808df | 2016-11-07 15:09:58 +1100 | [diff] [blame] | 1748 | case KVM_REG_PPC_TM_XER: |
| 1749 | vcpu->arch.xer_tm = set_reg_val(id, *val); |
| 1750 | break; |
Michael Neuling | a7d80d0 | 2014-03-25 10:47:03 +1100 | [diff] [blame] | 1751 | case KVM_REG_PPC_TM_LR: |
| 1752 | vcpu->arch.lr_tm = set_reg_val(id, *val); |
| 1753 | break; |
| 1754 | case KVM_REG_PPC_TM_CTR: |
| 1755 | vcpu->arch.ctr_tm = set_reg_val(id, *val); |
| 1756 | break; |
| 1757 | case KVM_REG_PPC_TM_FPSCR: |
| 1758 | vcpu->arch.fp_tm.fpscr = set_reg_val(id, *val); |
| 1759 | break; |
| 1760 | case KVM_REG_PPC_TM_AMR: |
| 1761 | vcpu->arch.amr_tm = set_reg_val(id, *val); |
| 1762 | break; |
| 1763 | case KVM_REG_PPC_TM_PPR: |
| 1764 | vcpu->arch.ppr_tm = set_reg_val(id, *val); |
| 1765 | break; |
| 1766 | case KVM_REG_PPC_TM_VRSAVE: |
| 1767 | vcpu->arch.vrsave_tm = set_reg_val(id, *val); |
| 1768 | break; |
| 1769 | case KVM_REG_PPC_TM_VSCR: |
| 1770 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) |
| 1771 | vcpu->arch.vr.vscr.u[3] = set_reg_val(id, *val); |
| 1772 | else |
| 1773 | r = - ENXIO; |
| 1774 | break; |
| 1775 | case KVM_REG_PPC_TM_DSCR: |
| 1776 | vcpu->arch.dscr_tm = set_reg_val(id, *val); |
| 1777 | break; |
| 1778 | case KVM_REG_PPC_TM_TAR: |
| 1779 | vcpu->arch.tar_tm = set_reg_val(id, *val); |
| 1780 | break; |
| 1781 | #endif |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 1782 | case KVM_REG_PPC_ARCH_COMPAT: |
| 1783 | r = kvmppc_set_arch_compat(vcpu, set_reg_val(id, *val)); |
| 1784 | break; |
Paul Mackerras | 5855564 | 2018-01-12 20:55:20 +1100 | [diff] [blame] | 1785 | case KVM_REG_PPC_DEC_EXPIRY: |
| 1786 | vcpu->arch.dec_expires = set_reg_val(id, *val) - |
| 1787 | vcpu->arch.vcore->tb_offset; |
| 1788 | break; |
Paul Mackerras | a1f1582 | 2018-04-20 15:33:21 +1000 | [diff] [blame] | 1789 | case KVM_REG_PPC_ONLINE: |
Paul Mackerras | 7aa1584 | 2018-04-20 19:53:22 +1000 | [diff] [blame] | 1790 | i = set_reg_val(id, *val); |
| 1791 | if (i && !vcpu->arch.online) |
| 1792 | atomic_inc(&vcpu->arch.vcore->online_count); |
| 1793 | else if (!i && vcpu->arch.online) |
| 1794 | atomic_dec(&vcpu->arch.vcore->online_count); |
| 1795 | vcpu->arch.online = i; |
Paul Mackerras | a1f1582 | 2018-04-20 15:33:21 +1000 | [diff] [blame] | 1796 | break; |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 1797 | default: |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 1798 | r = -EINVAL; |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 1799 | break; |
| 1800 | } |
| 1801 | |
| 1802 | return r; |
| 1803 | } |
| 1804 | |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 1805 | /* |
| 1806 | * On POWER9, threads are independent and can be in different partitions. |
| 1807 | * Therefore we consider each thread to be a subcore. |
| 1808 | * There is a restriction that all threads have to be in the same |
| 1809 | * MMU mode (radix or HPT), unfortunately, but since we only support |
| 1810 | * HPT guests on a HPT host so far, that isn't an impediment yet. |
| 1811 | */ |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 1812 | static int threads_per_vcore(struct kvm *kvm) |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 1813 | { |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 1814 | if (kvm->arch.threads_indep) |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 1815 | return 1; |
| 1816 | return threads_per_subcore; |
| 1817 | } |
| 1818 | |
Stewart Smith | de9bdd1 | 2014-07-18 14:18:42 +1000 | [diff] [blame] | 1819 | static struct kvmppc_vcore *kvmppc_vcore_create(struct kvm *kvm, int core) |
| 1820 | { |
| 1821 | struct kvmppc_vcore *vcore; |
| 1822 | |
| 1823 | vcore = kzalloc(sizeof(struct kvmppc_vcore), GFP_KERNEL); |
| 1824 | |
| 1825 | if (vcore == NULL) |
| 1826 | return NULL; |
| 1827 | |
Stewart Smith | de9bdd1 | 2014-07-18 14:18:42 +1000 | [diff] [blame] | 1828 | spin_lock_init(&vcore->lock); |
Paul Mackerras | 2711e24 | 2014-12-04 16:43:28 +1100 | [diff] [blame] | 1829 | spin_lock_init(&vcore->stoltb_lock); |
Marcelo Tosatti | 8577370 | 2016-02-19 09:46:39 +0100 | [diff] [blame] | 1830 | init_swait_queue_head(&vcore->wq); |
Stewart Smith | de9bdd1 | 2014-07-18 14:18:42 +1000 | [diff] [blame] | 1831 | vcore->preempt_tb = TB_NIL; |
| 1832 | vcore->lpcr = kvm->arch.lpcr; |
Paul Mackerras | 3c31352 | 2017-02-06 13:24:41 +1100 | [diff] [blame] | 1833 | vcore->first_vcpuid = core * kvm->arch.smt_mode; |
Stewart Smith | de9bdd1 | 2014-07-18 14:18:42 +1000 | [diff] [blame] | 1834 | vcore->kvm = kvm; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 1835 | INIT_LIST_HEAD(&vcore->preempt_list); |
Stewart Smith | de9bdd1 | 2014-07-18 14:18:42 +1000 | [diff] [blame] | 1836 | |
| 1837 | return vcore; |
| 1838 | } |
| 1839 | |
Paul Mackerras | b6c295d | 2015-03-28 14:21:02 +1100 | [diff] [blame] | 1840 | #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING |
| 1841 | static struct debugfs_timings_element { |
| 1842 | const char *name; |
| 1843 | size_t offset; |
| 1844 | } timings[] = { |
| 1845 | {"rm_entry", offsetof(struct kvm_vcpu, arch.rm_entry)}, |
| 1846 | {"rm_intr", offsetof(struct kvm_vcpu, arch.rm_intr)}, |
| 1847 | {"rm_exit", offsetof(struct kvm_vcpu, arch.rm_exit)}, |
| 1848 | {"guest", offsetof(struct kvm_vcpu, arch.guest_time)}, |
| 1849 | {"cede", offsetof(struct kvm_vcpu, arch.cede_time)}, |
| 1850 | }; |
| 1851 | |
Thomas Meyer | 4bb817ed | 2017-09-03 14:19:31 +0200 | [diff] [blame] | 1852 | #define N_TIMINGS (ARRAY_SIZE(timings)) |
Paul Mackerras | b6c295d | 2015-03-28 14:21:02 +1100 | [diff] [blame] | 1853 | |
| 1854 | struct debugfs_timings_state { |
| 1855 | struct kvm_vcpu *vcpu; |
| 1856 | unsigned int buflen; |
| 1857 | char buf[N_TIMINGS * 100]; |
| 1858 | }; |
| 1859 | |
| 1860 | static int debugfs_timings_open(struct inode *inode, struct file *file) |
| 1861 | { |
| 1862 | struct kvm_vcpu *vcpu = inode->i_private; |
| 1863 | struct debugfs_timings_state *p; |
| 1864 | |
| 1865 | p = kzalloc(sizeof(*p), GFP_KERNEL); |
| 1866 | if (!p) |
| 1867 | return -ENOMEM; |
| 1868 | |
| 1869 | kvm_get_kvm(vcpu->kvm); |
| 1870 | p->vcpu = vcpu; |
| 1871 | file->private_data = p; |
| 1872 | |
| 1873 | return nonseekable_open(inode, file); |
| 1874 | } |
| 1875 | |
| 1876 | static int debugfs_timings_release(struct inode *inode, struct file *file) |
| 1877 | { |
| 1878 | struct debugfs_timings_state *p = file->private_data; |
| 1879 | |
| 1880 | kvm_put_kvm(p->vcpu->kvm); |
| 1881 | kfree(p); |
| 1882 | return 0; |
| 1883 | } |
| 1884 | |
| 1885 | static ssize_t debugfs_timings_read(struct file *file, char __user *buf, |
| 1886 | size_t len, loff_t *ppos) |
| 1887 | { |
| 1888 | struct debugfs_timings_state *p = file->private_data; |
| 1889 | struct kvm_vcpu *vcpu = p->vcpu; |
| 1890 | char *s, *buf_end; |
| 1891 | struct kvmhv_tb_accumulator tb; |
| 1892 | u64 count; |
| 1893 | loff_t pos; |
| 1894 | ssize_t n; |
| 1895 | int i, loops; |
| 1896 | bool ok; |
| 1897 | |
| 1898 | if (!p->buflen) { |
| 1899 | s = p->buf; |
| 1900 | buf_end = s + sizeof(p->buf); |
| 1901 | for (i = 0; i < N_TIMINGS; ++i) { |
| 1902 | struct kvmhv_tb_accumulator *acc; |
| 1903 | |
| 1904 | acc = (struct kvmhv_tb_accumulator *) |
| 1905 | ((unsigned long)vcpu + timings[i].offset); |
| 1906 | ok = false; |
| 1907 | for (loops = 0; loops < 1000; ++loops) { |
| 1908 | count = acc->seqcount; |
| 1909 | if (!(count & 1)) { |
| 1910 | smp_rmb(); |
| 1911 | tb = *acc; |
| 1912 | smp_rmb(); |
| 1913 | if (count == acc->seqcount) { |
| 1914 | ok = true; |
| 1915 | break; |
| 1916 | } |
| 1917 | } |
| 1918 | udelay(1); |
| 1919 | } |
| 1920 | if (!ok) |
| 1921 | snprintf(s, buf_end - s, "%s: stuck\n", |
| 1922 | timings[i].name); |
| 1923 | else |
| 1924 | snprintf(s, buf_end - s, |
| 1925 | "%s: %llu %llu %llu %llu\n", |
| 1926 | timings[i].name, count / 2, |
| 1927 | tb_to_ns(tb.tb_total), |
| 1928 | tb_to_ns(tb.tb_min), |
| 1929 | tb_to_ns(tb.tb_max)); |
| 1930 | s += strlen(s); |
| 1931 | } |
| 1932 | p->buflen = s - p->buf; |
| 1933 | } |
| 1934 | |
| 1935 | pos = *ppos; |
| 1936 | if (pos >= p->buflen) |
| 1937 | return 0; |
| 1938 | if (len > p->buflen - pos) |
| 1939 | len = p->buflen - pos; |
| 1940 | n = copy_to_user(buf, p->buf + pos, len); |
| 1941 | if (n) { |
| 1942 | if (n == len) |
| 1943 | return -EFAULT; |
| 1944 | len -= n; |
| 1945 | } |
| 1946 | *ppos = pos + len; |
| 1947 | return len; |
| 1948 | } |
| 1949 | |
| 1950 | static ssize_t debugfs_timings_write(struct file *file, const char __user *buf, |
| 1951 | size_t len, loff_t *ppos) |
| 1952 | { |
| 1953 | return -EACCES; |
| 1954 | } |
| 1955 | |
| 1956 | static const struct file_operations debugfs_timings_ops = { |
| 1957 | .owner = THIS_MODULE, |
| 1958 | .open = debugfs_timings_open, |
| 1959 | .release = debugfs_timings_release, |
| 1960 | .read = debugfs_timings_read, |
| 1961 | .write = debugfs_timings_write, |
| 1962 | .llseek = generic_file_llseek, |
| 1963 | }; |
| 1964 | |
| 1965 | /* Create a debugfs directory for the vcpu */ |
| 1966 | static void debugfs_vcpu_init(struct kvm_vcpu *vcpu, unsigned int id) |
| 1967 | { |
| 1968 | char buf[16]; |
| 1969 | struct kvm *kvm = vcpu->kvm; |
| 1970 | |
| 1971 | snprintf(buf, sizeof(buf), "vcpu%u", id); |
| 1972 | if (IS_ERR_OR_NULL(kvm->arch.debugfs_dir)) |
| 1973 | return; |
| 1974 | vcpu->arch.debugfs_dir = debugfs_create_dir(buf, kvm->arch.debugfs_dir); |
| 1975 | if (IS_ERR_OR_NULL(vcpu->arch.debugfs_dir)) |
| 1976 | return; |
| 1977 | vcpu->arch.debugfs_timings = |
| 1978 | debugfs_create_file("timings", 0444, vcpu->arch.debugfs_dir, |
| 1979 | vcpu, &debugfs_timings_ops); |
| 1980 | } |
| 1981 | |
| 1982 | #else /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */ |
| 1983 | static void debugfs_vcpu_init(struct kvm_vcpu *vcpu, unsigned int id) |
| 1984 | { |
| 1985 | } |
| 1986 | #endif /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */ |
| 1987 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 1988 | static struct kvm_vcpu *kvmppc_core_vcpu_create_hv(struct kvm *kvm, |
| 1989 | unsigned int id) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1990 | { |
| 1991 | struct kvm_vcpu *vcpu; |
Paul Mackerras | 3c31352 | 2017-02-06 13:24:41 +1100 | [diff] [blame] | 1992 | int err; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1993 | int core; |
| 1994 | struct kvmppc_vcore *vcore; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1995 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1996 | err = -ENOMEM; |
Sasha Levin | 6b75e6b | 2011-12-07 10:24:56 +0200 | [diff] [blame] | 1997 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1998 | if (!vcpu) |
| 1999 | goto out; |
| 2000 | |
| 2001 | err = kvm_vcpu_init(vcpu, kvm, id); |
| 2002 | if (err) |
| 2003 | goto free_vcpu; |
| 2004 | |
| 2005 | vcpu->arch.shared = &vcpu->arch.shregs; |
Alexander Graf | 5deb8e7 | 2014-04-24 13:46:24 +0200 | [diff] [blame] | 2006 | #ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE |
| 2007 | /* |
| 2008 | * The shared struct is never shared on HV, |
| 2009 | * so we can always use host endianness |
| 2010 | */ |
| 2011 | #ifdef __BIG_ENDIAN__ |
| 2012 | vcpu->arch.shared_big_endian = true; |
| 2013 | #else |
| 2014 | vcpu->arch.shared_big_endian = false; |
| 2015 | #endif |
| 2016 | #endif |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2017 | vcpu->arch.mmcr[0] = MMCR0_FC; |
| 2018 | vcpu->arch.ctrl = CTRL_RUNLATCH; |
| 2019 | /* default to host PVR, since we can't spoof it */ |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 2020 | kvmppc_set_pvr_hv(vcpu, mfspr(SPRN_PVR)); |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 2021 | spin_lock_init(&vcpu->arch.vpa_update_lock); |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 2022 | spin_lock_init(&vcpu->arch.tbacct_lock); |
| 2023 | vcpu->arch.busy_preempt = TB_NIL; |
Anton Blanchard | d682916 | 2014-01-08 21:25:30 +1100 | [diff] [blame] | 2024 | vcpu->arch.intr_msr = MSR_SF | MSR_ME; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2025 | |
Paul Mackerras | 769377f | 2017-02-15 14:30:17 +1100 | [diff] [blame] | 2026 | /* |
| 2027 | * Set the default HFSCR for the guest from the host value. |
| 2028 | * This value is only used on POWER9. |
| 2029 | * On POWER9 DD1, TM doesn't work, so we make sure to |
| 2030 | * prevent the guest from using it. |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 2031 | * On POWER9, we want to virtualize the doorbell facility, so we |
| 2032 | * turn off the HFSCR bit, which causes those instructions to trap. |
Paul Mackerras | 769377f | 2017-02-15 14:30:17 +1100 | [diff] [blame] | 2033 | */ |
| 2034 | vcpu->arch.hfscr = mfspr(SPRN_HFSCR); |
Paul Mackerras | 4bb3c7a | 2018-03-21 21:32:01 +1100 | [diff] [blame] | 2035 | if (cpu_has_feature(CPU_FTR_P9_TM_HV_ASSIST)) |
| 2036 | vcpu->arch.hfscr |= HFSCR_TM; |
| 2037 | else if (!cpu_has_feature(CPU_FTR_TM_COMP)) |
Paul Mackerras | 769377f | 2017-02-15 14:30:17 +1100 | [diff] [blame] | 2038 | vcpu->arch.hfscr &= ~HFSCR_TM; |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 2039 | if (cpu_has_feature(CPU_FTR_ARCH_300)) |
| 2040 | vcpu->arch.hfscr &= ~HFSCR_MSGP; |
Paul Mackerras | 769377f | 2017-02-15 14:30:17 +1100 | [diff] [blame] | 2041 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2042 | kvmppc_mmu_book3s_hv_init(vcpu); |
| 2043 | |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 2044 | vcpu->arch.state = KVMPPC_VCPU_NOTREADY; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2045 | |
| 2046 | init_waitqueue_head(&vcpu->arch.cpu_run); |
| 2047 | |
| 2048 | mutex_lock(&kvm->lock); |
Paul Mackerras | 3c31352 | 2017-02-06 13:24:41 +1100 | [diff] [blame] | 2049 | vcore = NULL; |
| 2050 | err = -EINVAL; |
| 2051 | core = id / kvm->arch.smt_mode; |
| 2052 | if (core < KVM_MAX_VCORES) { |
| 2053 | vcore = kvm->arch.vcores[core]; |
| 2054 | if (!vcore) { |
| 2055 | err = -ENOMEM; |
| 2056 | vcore = kvmppc_vcore_create(kvm, core); |
| 2057 | kvm->arch.vcores[core] = vcore; |
| 2058 | kvm->arch.online_vcores++; |
| 2059 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2060 | } |
| 2061 | mutex_unlock(&kvm->lock); |
| 2062 | |
| 2063 | if (!vcore) |
| 2064 | goto free_vcpu; |
| 2065 | |
| 2066 | spin_lock(&vcore->lock); |
| 2067 | ++vcore->num_threads; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2068 | spin_unlock(&vcore->lock); |
| 2069 | vcpu->arch.vcore = vcore; |
Paul Mackerras | e0b7ec0 | 2014-01-08 21:25:20 +1100 | [diff] [blame] | 2070 | vcpu->arch.ptid = vcpu->vcpu_id - vcore->first_vcpuid; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2071 | vcpu->arch.thread_cpu = -1; |
Paul Mackerras | a29ebea | 2017-01-30 21:21:50 +1100 | [diff] [blame] | 2072 | vcpu->arch.prev_cpu = -1; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2073 | |
Alexander Graf | af8f38b | 2011-08-10 13:57:08 +0200 | [diff] [blame] | 2074 | vcpu->arch.cpu_type = KVM_CPU_3S_64; |
| 2075 | kvmppc_sanity_check(vcpu); |
| 2076 | |
Paul Mackerras | b6c295d | 2015-03-28 14:21:02 +1100 | [diff] [blame] | 2077 | debugfs_vcpu_init(vcpu, id); |
| 2078 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2079 | return vcpu; |
| 2080 | |
| 2081 | free_vcpu: |
Sasha Levin | 6b75e6b | 2011-12-07 10:24:56 +0200 | [diff] [blame] | 2082 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2083 | out: |
| 2084 | return ERR_PTR(err); |
| 2085 | } |
| 2086 | |
Paul Mackerras | 3c31352 | 2017-02-06 13:24:41 +1100 | [diff] [blame] | 2087 | static int kvmhv_set_smt_mode(struct kvm *kvm, unsigned long smt_mode, |
| 2088 | unsigned long flags) |
| 2089 | { |
| 2090 | int err; |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 2091 | int esmt = 0; |
Paul Mackerras | 3c31352 | 2017-02-06 13:24:41 +1100 | [diff] [blame] | 2092 | |
| 2093 | if (flags) |
| 2094 | return -EINVAL; |
| 2095 | if (smt_mode > MAX_SMT_THREADS || !is_power_of_2(smt_mode)) |
| 2096 | return -EINVAL; |
| 2097 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) { |
| 2098 | /* |
| 2099 | * On POWER8 (or POWER7), the threading mode is "strict", |
| 2100 | * so we pack smt_mode vcpus per vcore. |
| 2101 | */ |
| 2102 | if (smt_mode > threads_per_subcore) |
| 2103 | return -EINVAL; |
| 2104 | } else { |
| 2105 | /* |
| 2106 | * On POWER9, the threading mode is "loose", |
| 2107 | * so each vcpu gets its own vcore. |
| 2108 | */ |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 2109 | esmt = smt_mode; |
Paul Mackerras | 3c31352 | 2017-02-06 13:24:41 +1100 | [diff] [blame] | 2110 | smt_mode = 1; |
| 2111 | } |
| 2112 | mutex_lock(&kvm->lock); |
| 2113 | err = -EBUSY; |
| 2114 | if (!kvm->arch.online_vcores) { |
| 2115 | kvm->arch.smt_mode = smt_mode; |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 2116 | kvm->arch.emul_smt_mode = esmt; |
Paul Mackerras | 3c31352 | 2017-02-06 13:24:41 +1100 | [diff] [blame] | 2117 | err = 0; |
| 2118 | } |
| 2119 | mutex_unlock(&kvm->lock); |
| 2120 | |
| 2121 | return err; |
| 2122 | } |
| 2123 | |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 2124 | static void unpin_vpa(struct kvm *kvm, struct kvmppc_vpa *vpa) |
| 2125 | { |
| 2126 | if (vpa->pinned_addr) |
| 2127 | kvmppc_unpin_guest_page(kvm, vpa->pinned_addr, vpa->gpa, |
| 2128 | vpa->dirty); |
| 2129 | } |
| 2130 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 2131 | static void kvmppc_core_vcpu_free_hv(struct kvm_vcpu *vcpu) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2132 | { |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 2133 | spin_lock(&vcpu->arch.vpa_update_lock); |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 2134 | unpin_vpa(vcpu->kvm, &vcpu->arch.dtl); |
| 2135 | unpin_vpa(vcpu->kvm, &vcpu->arch.slb_shadow); |
| 2136 | unpin_vpa(vcpu->kvm, &vcpu->arch.vpa); |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 2137 | spin_unlock(&vcpu->arch.vpa_update_lock); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2138 | kvm_vcpu_uninit(vcpu); |
Sasha Levin | 6b75e6b | 2011-12-07 10:24:56 +0200 | [diff] [blame] | 2139 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2140 | } |
| 2141 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 2142 | static int kvmppc_core_check_requests_hv(struct kvm_vcpu *vcpu) |
| 2143 | { |
| 2144 | /* Indicate we want to get back into the guest */ |
| 2145 | return 1; |
| 2146 | } |
| 2147 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 2148 | static void kvmppc_set_timer(struct kvm_vcpu *vcpu) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2149 | { |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 2150 | unsigned long dec_nsec, now; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2151 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 2152 | now = get_tb(); |
| 2153 | if (now > vcpu->arch.dec_expires) { |
| 2154 | /* decrementer has already gone negative */ |
| 2155 | kvmppc_core_queue_dec(vcpu); |
Scott Wood | 7e28e60e | 2011-11-08 18:23:20 -0600 | [diff] [blame] | 2156 | kvmppc_core_prepare_to_enter(vcpu); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 2157 | return; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2158 | } |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 2159 | dec_nsec = (vcpu->arch.dec_expires - now) * NSEC_PER_SEC |
| 2160 | / tb_ticks_per_sec; |
Thomas Gleixner | 8b0e195 | 2016-12-25 12:30:41 +0100 | [diff] [blame] | 2161 | hrtimer_start(&vcpu->arch.dec_timer, dec_nsec, HRTIMER_MODE_REL); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 2162 | vcpu->arch.timer_running = 1; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2163 | } |
| 2164 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 2165 | static void kvmppc_end_cede(struct kvm_vcpu *vcpu) |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2166 | { |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 2167 | vcpu->arch.ceded = 0; |
| 2168 | if (vcpu->arch.timer_running) { |
| 2169 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); |
| 2170 | vcpu->arch.timer_running = 0; |
| 2171 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2172 | } |
| 2173 | |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 2174 | extern int __kvmppc_vcore_entry(void); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2175 | |
| 2176 | static void kvmppc_remove_runnable(struct kvmppc_vcore *vc, |
| 2177 | struct kvm_vcpu *vcpu) |
| 2178 | { |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 2179 | u64 now; |
| 2180 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2181 | if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) |
| 2182 | return; |
Paul Mackerras | bf3d32e | 2013-11-16 17:46:04 +1100 | [diff] [blame] | 2183 | spin_lock_irq(&vcpu->arch.tbacct_lock); |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 2184 | now = mftb(); |
| 2185 | vcpu->arch.busy_stolen += vcore_stolen_time(vc, now) - |
| 2186 | vcpu->arch.stolen_logged; |
| 2187 | vcpu->arch.busy_preempt = now; |
| 2188 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; |
Paul Mackerras | bf3d32e | 2013-11-16 17:46:04 +1100 | [diff] [blame] | 2189 | spin_unlock_irq(&vcpu->arch.tbacct_lock); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2190 | --vc->n_runnable; |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 2191 | WRITE_ONCE(vc->runnable_threads[vcpu->arch.ptid], NULL); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2192 | } |
| 2193 | |
Paul Mackerras | f0888f7 | 2012-02-03 00:54:17 +0000 | [diff] [blame] | 2194 | static int kvmppc_grab_hwthread(int cpu) |
| 2195 | { |
| 2196 | struct paca_struct *tpaca; |
Paul Mackerras | b754c73 | 2014-09-02 16:14:42 +1000 | [diff] [blame] | 2197 | long timeout = 10000; |
Paul Mackerras | f0888f7 | 2012-02-03 00:54:17 +0000 | [diff] [blame] | 2198 | |
Nicholas Piggin | d2e6007 | 2018-02-14 01:08:12 +1000 | [diff] [blame] | 2199 | tpaca = paca_ptrs[cpu]; |
Paul Mackerras | f0888f7 | 2012-02-03 00:54:17 +0000 | [diff] [blame] | 2200 | |
| 2201 | /* Ensure the thread won't go into the kernel if it wakes */ |
Paul Mackerras | 7b444c6 | 2012-10-15 01:16:14 +0000 | [diff] [blame] | 2202 | tpaca->kvm_hstate.kvm_vcpu = NULL; |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2203 | tpaca->kvm_hstate.kvm_vcore = NULL; |
Paul Mackerras | 5d5b99c | 2015-03-28 14:21:06 +1100 | [diff] [blame] | 2204 | tpaca->kvm_hstate.napping = 0; |
| 2205 | smp_wmb(); |
| 2206 | tpaca->kvm_hstate.hwthread_req = 1; |
Paul Mackerras | f0888f7 | 2012-02-03 00:54:17 +0000 | [diff] [blame] | 2207 | |
| 2208 | /* |
| 2209 | * If the thread is already executing in the kernel (e.g. handling |
| 2210 | * a stray interrupt), wait for it to get back to nap mode. |
| 2211 | * The smp_mb() is to ensure that our setting of hwthread_req |
| 2212 | * is visible before we look at hwthread_state, so if this |
| 2213 | * races with the code at system_reset_pSeries and the thread |
| 2214 | * misses our setting of hwthread_req, we are sure to see its |
| 2215 | * setting of hwthread_state, and vice versa. |
| 2216 | */ |
| 2217 | smp_mb(); |
| 2218 | while (tpaca->kvm_hstate.hwthread_state == KVM_HWTHREAD_IN_KERNEL) { |
| 2219 | if (--timeout <= 0) { |
| 2220 | pr_err("KVM: couldn't grab cpu %d\n", cpu); |
| 2221 | return -EBUSY; |
| 2222 | } |
| 2223 | udelay(1); |
| 2224 | } |
| 2225 | return 0; |
| 2226 | } |
| 2227 | |
| 2228 | static void kvmppc_release_hwthread(int cpu) |
| 2229 | { |
| 2230 | struct paca_struct *tpaca; |
| 2231 | |
Nicholas Piggin | d2e6007 | 2018-02-14 01:08:12 +1000 | [diff] [blame] | 2232 | tpaca = paca_ptrs[cpu]; |
Paul Mackerras | 31a4d44 | 2017-10-19 15:14:20 +1100 | [diff] [blame] | 2233 | tpaca->kvm_hstate.hwthread_req = 0; |
Paul Mackerras | f0888f7 | 2012-02-03 00:54:17 +0000 | [diff] [blame] | 2234 | tpaca->kvm_hstate.kvm_vcpu = NULL; |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2235 | tpaca->kvm_hstate.kvm_vcore = NULL; |
| 2236 | tpaca->kvm_hstate.kvm_split_mode = NULL; |
Paul Mackerras | f0888f7 | 2012-02-03 00:54:17 +0000 | [diff] [blame] | 2237 | } |
| 2238 | |
Paul Mackerras | a29ebea | 2017-01-30 21:21:50 +1100 | [diff] [blame] | 2239 | static void radix_flush_cpu(struct kvm *kvm, int cpu, struct kvm_vcpu *vcpu) |
| 2240 | { |
| 2241 | int i; |
| 2242 | |
| 2243 | cpu = cpu_first_thread_sibling(cpu); |
| 2244 | cpumask_set_cpu(cpu, &kvm->arch.need_tlb_flush); |
| 2245 | /* |
| 2246 | * Make sure setting of bit in need_tlb_flush precedes |
| 2247 | * testing of cpu_in_guest bits. The matching barrier on |
| 2248 | * the other side is the first smp_mb() in kvmppc_run_core(). |
| 2249 | */ |
| 2250 | smp_mb(); |
| 2251 | for (i = 0; i < threads_per_core; ++i) |
| 2252 | if (cpumask_test_cpu(cpu + i, &kvm->arch.cpu_in_guest)) |
| 2253 | smp_call_function_single(cpu + i, do_nothing, NULL, 1); |
| 2254 | } |
| 2255 | |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 2256 | static void kvmppc_prepare_radix_vcpu(struct kvm_vcpu *vcpu, int pcpu) |
| 2257 | { |
| 2258 | struct kvm *kvm = vcpu->kvm; |
| 2259 | |
| 2260 | /* |
| 2261 | * With radix, the guest can do TLB invalidations itself, |
| 2262 | * and it could choose to use the local form (tlbiel) if |
| 2263 | * it is invalidating a translation that has only ever been |
| 2264 | * used on one vcpu. However, that doesn't mean it has |
| 2265 | * only ever been used on one physical cpu, since vcpus |
| 2266 | * can move around between pcpus. To cope with this, when |
| 2267 | * a vcpu moves from one pcpu to another, we need to tell |
| 2268 | * any vcpus running on the same core as this vcpu previously |
| 2269 | * ran to flush the TLB. The TLB is shared between threads, |
| 2270 | * so we use a single bit in .need_tlb_flush for all 4 threads. |
| 2271 | */ |
| 2272 | if (vcpu->arch.prev_cpu != pcpu) { |
| 2273 | if (vcpu->arch.prev_cpu >= 0 && |
| 2274 | cpu_first_thread_sibling(vcpu->arch.prev_cpu) != |
| 2275 | cpu_first_thread_sibling(pcpu)) |
| 2276 | radix_flush_cpu(kvm, vcpu->arch.prev_cpu, vcpu); |
| 2277 | vcpu->arch.prev_cpu = pcpu; |
| 2278 | } |
| 2279 | } |
| 2280 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2281 | static void kvmppc_start_thread(struct kvm_vcpu *vcpu, struct kvmppc_vcore *vc) |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2282 | { |
| 2283 | int cpu; |
| 2284 | struct paca_struct *tpaca; |
Paul Mackerras | a29ebea | 2017-01-30 21:21:50 +1100 | [diff] [blame] | 2285 | struct kvm *kvm = vc->kvm; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2286 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2287 | cpu = vc->pcpu; |
| 2288 | if (vcpu) { |
| 2289 | if (vcpu->arch.timer_running) { |
| 2290 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); |
| 2291 | vcpu->arch.timer_running = 0; |
| 2292 | } |
| 2293 | cpu += vcpu->arch.ptid; |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 2294 | vcpu->cpu = vc->pcpu; |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2295 | vcpu->arch.thread_cpu = cpu; |
Paul Mackerras | a29ebea | 2017-01-30 21:21:50 +1100 | [diff] [blame] | 2296 | cpumask_set_cpu(cpu, &kvm->arch.cpu_in_guest); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 2297 | } |
Nicholas Piggin | d2e6007 | 2018-02-14 01:08:12 +1000 | [diff] [blame] | 2298 | tpaca = paca_ptrs[cpu]; |
Paul Mackerras | 5d5b99c | 2015-03-28 14:21:06 +1100 | [diff] [blame] | 2299 | tpaca->kvm_hstate.kvm_vcpu = vcpu; |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 2300 | tpaca->kvm_hstate.ptid = cpu - vc->pcpu; |
Paul Mackerras | 4bb3c7a | 2018-03-21 21:32:01 +1100 | [diff] [blame] | 2301 | tpaca->kvm_hstate.fake_suspend = 0; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2302 | /* Order stores to hstate.kvm_vcpu etc. before store to kvm_vcore */ |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 2303 | smp_wmb(); |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 2304 | tpaca->kvm_hstate.kvm_vcore = vc; |
Paul Mackerras | 5d5b99c | 2015-03-28 14:21:06 +1100 | [diff] [blame] | 2305 | if (cpu != smp_processor_id()) |
Paul Mackerras | 66feed6 | 2015-03-28 14:21:12 +1100 | [diff] [blame] | 2306 | kvmppc_ipi_thread(cpu); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2307 | } |
| 2308 | |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 2309 | static void kvmppc_wait_for_nap(int n_threads) |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2310 | { |
Paul Mackerras | 5d5b99c | 2015-03-28 14:21:06 +1100 | [diff] [blame] | 2311 | int cpu = smp_processor_id(); |
| 2312 | int i, loops; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2313 | |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 2314 | if (n_threads <= 1) |
| 2315 | return; |
Paul Mackerras | 5d5b99c | 2015-03-28 14:21:06 +1100 | [diff] [blame] | 2316 | for (loops = 0; loops < 1000000; ++loops) { |
| 2317 | /* |
| 2318 | * Check if all threads are finished. |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2319 | * We set the vcore pointer when starting a thread |
Paul Mackerras | 5d5b99c | 2015-03-28 14:21:06 +1100 | [diff] [blame] | 2320 | * and the thread clears it when finished, so we look |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2321 | * for any threads that still have a non-NULL vcore ptr. |
Paul Mackerras | 5d5b99c | 2015-03-28 14:21:06 +1100 | [diff] [blame] | 2322 | */ |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 2323 | for (i = 1; i < n_threads; ++i) |
Nicholas Piggin | d2e6007 | 2018-02-14 01:08:12 +1000 | [diff] [blame] | 2324 | if (paca_ptrs[cpu + i]->kvm_hstate.kvm_vcore) |
Paul Mackerras | 5d5b99c | 2015-03-28 14:21:06 +1100 | [diff] [blame] | 2325 | break; |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 2326 | if (i == n_threads) { |
Paul Mackerras | 5d5b99c | 2015-03-28 14:21:06 +1100 | [diff] [blame] | 2327 | HMT_medium(); |
| 2328 | return; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2329 | } |
Paul Mackerras | 5d5b99c | 2015-03-28 14:21:06 +1100 | [diff] [blame] | 2330 | HMT_low(); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2331 | } |
| 2332 | HMT_medium(); |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 2333 | for (i = 1; i < n_threads; ++i) |
Nicholas Piggin | d2e6007 | 2018-02-14 01:08:12 +1000 | [diff] [blame] | 2334 | if (paca_ptrs[cpu + i]->kvm_hstate.kvm_vcore) |
Paul Mackerras | 5d5b99c | 2015-03-28 14:21:06 +1100 | [diff] [blame] | 2335 | pr_err("KVM: CPU %d seems to be stuck\n", cpu + i); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2336 | } |
| 2337 | |
| 2338 | /* |
| 2339 | * Check that we are on thread 0 and that any other threads in |
Paul Mackerras | 7b444c6 | 2012-10-15 01:16:14 +0000 | [diff] [blame] | 2340 | * this core are off-line. Then grab the threads so they can't |
| 2341 | * enter the kernel. |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2342 | */ |
| 2343 | static int on_primary_thread(void) |
| 2344 | { |
| 2345 | int cpu = smp_processor_id(); |
Michael Ellerman | 3102f78 | 2014-05-23 18:15:29 +1000 | [diff] [blame] | 2346 | int thr; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2347 | |
Michael Ellerman | 3102f78 | 2014-05-23 18:15:29 +1000 | [diff] [blame] | 2348 | /* Are we on a primary subcore? */ |
| 2349 | if (cpu_thread_in_subcore(cpu)) |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2350 | return 0; |
Michael Ellerman | 3102f78 | 2014-05-23 18:15:29 +1000 | [diff] [blame] | 2351 | |
| 2352 | thr = 0; |
| 2353 | while (++thr < threads_per_subcore) |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2354 | if (cpu_online(cpu + thr)) |
| 2355 | return 0; |
Paul Mackerras | 7b444c6 | 2012-10-15 01:16:14 +0000 | [diff] [blame] | 2356 | |
| 2357 | /* Grab all hw threads so they can't go into the kernel */ |
Michael Ellerman | 3102f78 | 2014-05-23 18:15:29 +1000 | [diff] [blame] | 2358 | for (thr = 1; thr < threads_per_subcore; ++thr) { |
Paul Mackerras | 7b444c6 | 2012-10-15 01:16:14 +0000 | [diff] [blame] | 2359 | if (kvmppc_grab_hwthread(cpu + thr)) { |
| 2360 | /* Couldn't grab one; let the others go */ |
| 2361 | do { |
| 2362 | kvmppc_release_hwthread(cpu + thr); |
| 2363 | } while (--thr > 0); |
| 2364 | return 0; |
| 2365 | } |
| 2366 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2367 | return 1; |
| 2368 | } |
| 2369 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2370 | /* |
| 2371 | * A list of virtual cores for each physical CPU. |
| 2372 | * These are vcores that could run but their runner VCPU tasks are |
| 2373 | * (or may be) preempted. |
| 2374 | */ |
| 2375 | struct preempted_vcore_list { |
| 2376 | struct list_head list; |
| 2377 | spinlock_t lock; |
| 2378 | }; |
| 2379 | |
| 2380 | static DEFINE_PER_CPU(struct preempted_vcore_list, preempted_vcores); |
| 2381 | |
| 2382 | static void init_vcore_lists(void) |
| 2383 | { |
| 2384 | int cpu; |
| 2385 | |
| 2386 | for_each_possible_cpu(cpu) { |
| 2387 | struct preempted_vcore_list *lp = &per_cpu(preempted_vcores, cpu); |
| 2388 | spin_lock_init(&lp->lock); |
| 2389 | INIT_LIST_HEAD(&lp->list); |
| 2390 | } |
| 2391 | } |
| 2392 | |
| 2393 | static void kvmppc_vcore_preempt(struct kvmppc_vcore *vc) |
| 2394 | { |
| 2395 | struct preempted_vcore_list *lp = this_cpu_ptr(&preempted_vcores); |
| 2396 | |
| 2397 | vc->vcore_state = VCORE_PREEMPT; |
| 2398 | vc->pcpu = smp_processor_id(); |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 2399 | if (vc->num_threads < threads_per_vcore(vc->kvm)) { |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2400 | spin_lock(&lp->lock); |
| 2401 | list_add_tail(&vc->preempt_list, &lp->list); |
| 2402 | spin_unlock(&lp->lock); |
| 2403 | } |
| 2404 | |
| 2405 | /* Start accumulating stolen time */ |
| 2406 | kvmppc_core_start_stolen(vc); |
| 2407 | } |
| 2408 | |
| 2409 | static void kvmppc_vcore_end_preempt(struct kvmppc_vcore *vc) |
| 2410 | { |
Paul Mackerras | 402813f | 2015-07-16 17:11:13 +1000 | [diff] [blame] | 2411 | struct preempted_vcore_list *lp; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2412 | |
| 2413 | kvmppc_core_end_stolen(vc); |
| 2414 | if (!list_empty(&vc->preempt_list)) { |
Paul Mackerras | 402813f | 2015-07-16 17:11:13 +1000 | [diff] [blame] | 2415 | lp = &per_cpu(preempted_vcores, vc->pcpu); |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2416 | spin_lock(&lp->lock); |
| 2417 | list_del_init(&vc->preempt_list); |
| 2418 | spin_unlock(&lp->lock); |
| 2419 | } |
| 2420 | vc->vcore_state = VCORE_INACTIVE; |
| 2421 | } |
| 2422 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2423 | /* |
| 2424 | * This stores information about the virtual cores currently |
| 2425 | * assigned to a physical core. |
| 2426 | */ |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2427 | struct core_info { |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2428 | int n_subcores; |
| 2429 | int max_subcore_threads; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2430 | int total_threads; |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2431 | int subcore_threads[MAX_SUBCORES]; |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 2432 | struct kvmppc_vcore *vc[MAX_SUBCORES]; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2433 | }; |
| 2434 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2435 | /* |
| 2436 | * This mapping means subcores 0 and 1 can use threads 0-3 and 4-7 |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 2437 | * respectively in 2-way micro-threading (split-core) mode on POWER8. |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2438 | */ |
| 2439 | static int subcore_thread_map[MAX_SUBCORES] = { 0, 4, 2, 6 }; |
| 2440 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2441 | static void init_core_info(struct core_info *cip, struct kvmppc_vcore *vc) |
| 2442 | { |
| 2443 | memset(cip, 0, sizeof(*cip)); |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2444 | cip->n_subcores = 1; |
| 2445 | cip->max_subcore_threads = vc->num_threads; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2446 | cip->total_threads = vc->num_threads; |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2447 | cip->subcore_threads[0] = vc->num_threads; |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 2448 | cip->vc[0] = vc; |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2449 | } |
| 2450 | |
| 2451 | static bool subcore_config_ok(int n_subcores, int n_threads) |
| 2452 | { |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 2453 | /* |
Paul Mackerras | 00608e1 | 2018-01-11 16:54:26 +1100 | [diff] [blame] | 2454 | * POWER9 "SMT4" cores are permanently in what is effectively a 4-way |
| 2455 | * split-core mode, with one thread per subcore. |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 2456 | */ |
| 2457 | if (cpu_has_feature(CPU_FTR_ARCH_300)) |
| 2458 | return n_subcores <= 4 && n_threads == 1; |
| 2459 | |
| 2460 | /* On POWER8, can only dynamically split if unsplit to begin with */ |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2461 | if (n_subcores > 1 && threads_per_subcore < MAX_SMT_THREADS) |
| 2462 | return false; |
| 2463 | if (n_subcores > MAX_SUBCORES) |
| 2464 | return false; |
| 2465 | if (n_subcores > 1) { |
| 2466 | if (!(dynamic_mt_modes & 2)) |
| 2467 | n_subcores = 4; |
| 2468 | if (n_subcores > 2 && !(dynamic_mt_modes & 4)) |
| 2469 | return false; |
| 2470 | } |
| 2471 | |
| 2472 | return n_subcores * roundup_pow_of_two(n_threads) <= MAX_SMT_THREADS; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2473 | } |
| 2474 | |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 2475 | static void init_vcore_to_run(struct kvmppc_vcore *vc) |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2476 | { |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2477 | vc->entry_exit_map = 0; |
| 2478 | vc->in_guest = 0; |
| 2479 | vc->napping_threads = 0; |
| 2480 | vc->conferring_threads = 0; |
Paul Mackerras | 57b8daa | 2018-04-20 22:51:11 +1000 | [diff] [blame] | 2481 | vc->tb_offset_applied = 0; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2482 | } |
| 2483 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2484 | static bool can_dynamic_split(struct kvmppc_vcore *vc, struct core_info *cip) |
| 2485 | { |
| 2486 | int n_threads = vc->num_threads; |
| 2487 | int sub; |
| 2488 | |
| 2489 | if (!cpu_has_feature(CPU_FTR_ARCH_207S)) |
| 2490 | return false; |
| 2491 | |
Paul Mackerras | 00608e1 | 2018-01-11 16:54:26 +1100 | [diff] [blame] | 2492 | /* Some POWER9 chips require all threads to be in the same MMU mode */ |
| 2493 | if (no_mixing_hpt_and_radix && |
Paul Mackerras | c010150 | 2017-10-19 14:11:23 +1100 | [diff] [blame] | 2494 | kvm_is_radix(vc->kvm) != kvm_is_radix(cip->vc[0]->kvm)) |
| 2495 | return false; |
| 2496 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2497 | if (n_threads < cip->max_subcore_threads) |
| 2498 | n_threads = cip->max_subcore_threads; |
Paul Mackerras | b009031 | 2016-09-15 16:27:41 +1000 | [diff] [blame] | 2499 | if (!subcore_config_ok(cip->n_subcores + 1, n_threads)) |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2500 | return false; |
Paul Mackerras | b009031 | 2016-09-15 16:27:41 +1000 | [diff] [blame] | 2501 | cip->max_subcore_threads = n_threads; |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2502 | |
| 2503 | sub = cip->n_subcores; |
| 2504 | ++cip->n_subcores; |
| 2505 | cip->total_threads += vc->num_threads; |
| 2506 | cip->subcore_threads[sub] = vc->num_threads; |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 2507 | cip->vc[sub] = vc; |
| 2508 | init_vcore_to_run(vc); |
| 2509 | list_del_init(&vc->preempt_list); |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2510 | |
| 2511 | return true; |
| 2512 | } |
| 2513 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2514 | /* |
| 2515 | * Work out whether it is possible to piggyback the execution of |
| 2516 | * vcore *pvc onto the execution of the other vcores described in *cip. |
| 2517 | */ |
| 2518 | static bool can_piggyback(struct kvmppc_vcore *pvc, struct core_info *cip, |
| 2519 | int target_threads) |
| 2520 | { |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2521 | if (cip->total_threads + pvc->num_threads > target_threads) |
| 2522 | return false; |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2523 | |
Paul Mackerras | b009031 | 2016-09-15 16:27:41 +1000 | [diff] [blame] | 2524 | return can_dynamic_split(pvc, cip); |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2525 | } |
| 2526 | |
Paul Mackerras | d911f0b | 2015-03-28 14:21:03 +1100 | [diff] [blame] | 2527 | static void prepare_threads(struct kvmppc_vcore *vc) |
| 2528 | { |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 2529 | int i; |
| 2530 | struct kvm_vcpu *vcpu; |
Paul Mackerras | d911f0b | 2015-03-28 14:21:03 +1100 | [diff] [blame] | 2531 | |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 2532 | for_each_runnable_thread(i, vcpu, vc) { |
Paul Mackerras | d911f0b | 2015-03-28 14:21:03 +1100 | [diff] [blame] | 2533 | if (signal_pending(vcpu->arch.run_task)) |
| 2534 | vcpu->arch.ret = -EINTR; |
| 2535 | else if (vcpu->arch.vpa.update_pending || |
| 2536 | vcpu->arch.slb_shadow.update_pending || |
| 2537 | vcpu->arch.dtl.update_pending) |
| 2538 | vcpu->arch.ret = RESUME_GUEST; |
| 2539 | else |
| 2540 | continue; |
| 2541 | kvmppc_remove_runnable(vc, vcpu); |
| 2542 | wake_up(&vcpu->arch.cpu_run); |
| 2543 | } |
| 2544 | } |
| 2545 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2546 | static void collect_piggybacks(struct core_info *cip, int target_threads) |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 2547 | { |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2548 | struct preempted_vcore_list *lp = this_cpu_ptr(&preempted_vcores); |
| 2549 | struct kvmppc_vcore *pvc, *vcnext; |
| 2550 | |
| 2551 | spin_lock(&lp->lock); |
| 2552 | list_for_each_entry_safe(pvc, vcnext, &lp->list, preempt_list) { |
| 2553 | if (!spin_trylock(&pvc->lock)) |
| 2554 | continue; |
| 2555 | prepare_threads(pvc); |
| 2556 | if (!pvc->n_runnable) { |
| 2557 | list_del_init(&pvc->preempt_list); |
| 2558 | if (pvc->runner == NULL) { |
| 2559 | pvc->vcore_state = VCORE_INACTIVE; |
| 2560 | kvmppc_core_end_stolen(pvc); |
| 2561 | } |
| 2562 | spin_unlock(&pvc->lock); |
| 2563 | continue; |
| 2564 | } |
| 2565 | if (!can_piggyback(pvc, cip, target_threads)) { |
| 2566 | spin_unlock(&pvc->lock); |
| 2567 | continue; |
| 2568 | } |
| 2569 | kvmppc_core_end_stolen(pvc); |
| 2570 | pvc->vcore_state = VCORE_PIGGYBACK; |
| 2571 | if (cip->total_threads >= target_threads) |
| 2572 | break; |
| 2573 | } |
| 2574 | spin_unlock(&lp->lock); |
| 2575 | } |
| 2576 | |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 2577 | static bool recheck_signals(struct core_info *cip) |
| 2578 | { |
| 2579 | int sub, i; |
| 2580 | struct kvm_vcpu *vcpu; |
| 2581 | |
| 2582 | for (sub = 0; sub < cip->n_subcores; ++sub) |
| 2583 | for_each_runnable_thread(i, vcpu, cip->vc[sub]) |
| 2584 | if (signal_pending(vcpu->arch.run_task)) |
| 2585 | return true; |
| 2586 | return false; |
| 2587 | } |
| 2588 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2589 | static void post_guest_process(struct kvmppc_vcore *vc, bool is_master) |
| 2590 | { |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 2591 | int still_running = 0, i; |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 2592 | u64 now; |
| 2593 | long ret; |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 2594 | struct kvm_vcpu *vcpu; |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 2595 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2596 | spin_lock(&vc->lock); |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 2597 | now = get_tb(); |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 2598 | for_each_runnable_thread(i, vcpu, vc) { |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 2599 | /* cancel pending dec exception if dec is positive */ |
| 2600 | if (now < vcpu->arch.dec_expires && |
| 2601 | kvmppc_core_pending_dec(vcpu)) |
| 2602 | kvmppc_core_dequeue_dec(vcpu); |
| 2603 | |
| 2604 | trace_kvm_guest_exit(vcpu); |
| 2605 | |
| 2606 | ret = RESUME_GUEST; |
| 2607 | if (vcpu->arch.trap) |
| 2608 | ret = kvmppc_handle_exit_hv(vcpu->arch.kvm_run, vcpu, |
| 2609 | vcpu->arch.run_task); |
| 2610 | |
| 2611 | vcpu->arch.ret = ret; |
| 2612 | vcpu->arch.trap = 0; |
| 2613 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2614 | if (is_kvmppc_resume_guest(vcpu->arch.ret)) { |
| 2615 | if (vcpu->arch.pending_exceptions) |
| 2616 | kvmppc_core_prepare_to_enter(vcpu); |
| 2617 | if (vcpu->arch.ceded) |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 2618 | kvmppc_set_timer(vcpu); |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2619 | else |
| 2620 | ++still_running; |
| 2621 | } else { |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 2622 | kvmppc_remove_runnable(vc, vcpu); |
| 2623 | wake_up(&vcpu->arch.cpu_run); |
| 2624 | } |
| 2625 | } |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2626 | if (!is_master) { |
Paul Mackerras | 563a1e9 | 2015-07-16 17:11:14 +1000 | [diff] [blame] | 2627 | if (still_running > 0) { |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2628 | kvmppc_vcore_preempt(vc); |
Paul Mackerras | 563a1e9 | 2015-07-16 17:11:14 +1000 | [diff] [blame] | 2629 | } else if (vc->runner) { |
| 2630 | vc->vcore_state = VCORE_PREEMPT; |
| 2631 | kvmppc_core_start_stolen(vc); |
| 2632 | } else { |
| 2633 | vc->vcore_state = VCORE_INACTIVE; |
| 2634 | } |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2635 | if (vc->n_runnable > 0 && vc->runner == NULL) { |
| 2636 | /* make sure there's a candidate runner awake */ |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 2637 | i = -1; |
| 2638 | vcpu = next_runnable_thread(vc, &i); |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2639 | wake_up(&vcpu->arch.cpu_run); |
| 2640 | } |
| 2641 | } |
| 2642 | spin_unlock(&vc->lock); |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 2643 | } |
| 2644 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2645 | /* |
Suresh Warrier | b8e6a87 | 2015-12-17 14:59:07 -0600 | [diff] [blame] | 2646 | * Clear core from the list of active host cores as we are about to |
| 2647 | * enter the guest. Only do this if it is the primary thread of the |
| 2648 | * core (not if a subcore) that is entering the guest. |
| 2649 | */ |
Anna-Maria Gleixner | 3f7cd91 | 2016-11-27 00:13:45 +0100 | [diff] [blame] | 2650 | static inline int kvmppc_clear_host_core(unsigned int cpu) |
Suresh Warrier | b8e6a87 | 2015-12-17 14:59:07 -0600 | [diff] [blame] | 2651 | { |
| 2652 | int core; |
| 2653 | |
| 2654 | if (!kvmppc_host_rm_ops_hv || cpu_thread_in_core(cpu)) |
Anna-Maria Gleixner | 3f7cd91 | 2016-11-27 00:13:45 +0100 | [diff] [blame] | 2655 | return 0; |
Suresh Warrier | b8e6a87 | 2015-12-17 14:59:07 -0600 | [diff] [blame] | 2656 | /* |
| 2657 | * Memory barrier can be omitted here as we will do a smp_wmb() |
| 2658 | * later in kvmppc_start_thread and we need ensure that state is |
| 2659 | * visible to other CPUs only after we enter guest. |
| 2660 | */ |
| 2661 | core = cpu >> threads_shift; |
| 2662 | kvmppc_host_rm_ops_hv->rm_core[core].rm_state.in_host = 0; |
Anna-Maria Gleixner | 3f7cd91 | 2016-11-27 00:13:45 +0100 | [diff] [blame] | 2663 | return 0; |
Suresh Warrier | b8e6a87 | 2015-12-17 14:59:07 -0600 | [diff] [blame] | 2664 | } |
| 2665 | |
| 2666 | /* |
| 2667 | * Advertise this core as an active host core since we exited the guest |
| 2668 | * Only need to do this if it is the primary thread of the core that is |
| 2669 | * exiting. |
| 2670 | */ |
Anna-Maria Gleixner | 3f7cd91 | 2016-11-27 00:13:45 +0100 | [diff] [blame] | 2671 | static inline int kvmppc_set_host_core(unsigned int cpu) |
Suresh Warrier | b8e6a87 | 2015-12-17 14:59:07 -0600 | [diff] [blame] | 2672 | { |
| 2673 | int core; |
| 2674 | |
| 2675 | if (!kvmppc_host_rm_ops_hv || cpu_thread_in_core(cpu)) |
Anna-Maria Gleixner | 3f7cd91 | 2016-11-27 00:13:45 +0100 | [diff] [blame] | 2676 | return 0; |
Suresh Warrier | b8e6a87 | 2015-12-17 14:59:07 -0600 | [diff] [blame] | 2677 | |
| 2678 | /* |
| 2679 | * Memory barrier can be omitted here because we do a spin_unlock |
| 2680 | * immediately after this which provides the memory barrier. |
| 2681 | */ |
| 2682 | core = cpu >> threads_shift; |
| 2683 | kvmppc_host_rm_ops_hv->rm_core[core].rm_state.in_host = 1; |
Anna-Maria Gleixner | 3f7cd91 | 2016-11-27 00:13:45 +0100 | [diff] [blame] | 2684 | return 0; |
Suresh Warrier | b8e6a87 | 2015-12-17 14:59:07 -0600 | [diff] [blame] | 2685 | } |
| 2686 | |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 2687 | static void set_irq_happened(int trap) |
| 2688 | { |
| 2689 | switch (trap) { |
| 2690 | case BOOK3S_INTERRUPT_EXTERNAL: |
| 2691 | local_paca->irq_happened |= PACA_IRQ_EE; |
| 2692 | break; |
| 2693 | case BOOK3S_INTERRUPT_H_DOORBELL: |
| 2694 | local_paca->irq_happened |= PACA_IRQ_DBELL; |
| 2695 | break; |
| 2696 | case BOOK3S_INTERRUPT_HMI: |
| 2697 | local_paca->irq_happened |= PACA_IRQ_HMI; |
| 2698 | break; |
Nicholas Piggin | 6de6638 | 2017-11-05 23:33:55 +1100 | [diff] [blame] | 2699 | case BOOK3S_INTERRUPT_SYSTEM_RESET: |
| 2700 | replay_system_reset(); |
| 2701 | break; |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 2702 | } |
| 2703 | } |
| 2704 | |
Suresh Warrier | b8e6a87 | 2015-12-17 14:59:07 -0600 | [diff] [blame] | 2705 | /* |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2706 | * Run a set of guest threads on a physical core. |
| 2707 | * Called with vc->lock held. |
| 2708 | */ |
Paul Mackerras | 66feed6 | 2015-03-28 14:21:12 +1100 | [diff] [blame] | 2709 | static noinline void kvmppc_run_core(struct kvmppc_vcore *vc) |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2710 | { |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 2711 | struct kvm_vcpu *vcpu; |
Paul Mackerras | d911f0b | 2015-03-28 14:21:03 +1100 | [diff] [blame] | 2712 | int i; |
Paul Mackerras | 2c9097e | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 2713 | int srcu_idx; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2714 | struct core_info core_info; |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 2715 | struct kvmppc_vcore *pvc; |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2716 | struct kvm_split_mode split_info, *sip; |
| 2717 | int split, subcore_size, active; |
| 2718 | int sub; |
| 2719 | bool thr0_done; |
| 2720 | unsigned long cmd_bit, stat_bit; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2721 | int pcpu, thr; |
| 2722 | int target_threads; |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 2723 | int controlled_threads; |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 2724 | int trap; |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 2725 | bool is_power8; |
Paul Mackerras | c010150 | 2017-10-19 14:11:23 +1100 | [diff] [blame] | 2726 | bool hpt_on_radix; |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 2727 | |
| 2728 | /* |
Paul Mackerras | d911f0b | 2015-03-28 14:21:03 +1100 | [diff] [blame] | 2729 | * Remove from the list any threads that have a signal pending |
| 2730 | * or need a VPA update done |
| 2731 | */ |
| 2732 | prepare_threads(vc); |
| 2733 | |
| 2734 | /* if the runner is no longer runnable, let the caller pick a new one */ |
| 2735 | if (vc->runner->arch.state != KVMPPC_VCPU_RUNNABLE) |
| 2736 | return; |
| 2737 | |
| 2738 | /* |
| 2739 | * Initialize *vc. |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 2740 | */ |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 2741 | init_vcore_to_run(vc); |
Paul Mackerras | 2711e24 | 2014-12-04 16:43:28 +1100 | [diff] [blame] | 2742 | vc->preempt_tb = TB_NIL; |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 2743 | |
| 2744 | /* |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 2745 | * Number of threads that we will be controlling: the same as |
| 2746 | * the number of threads per subcore, except on POWER9, |
| 2747 | * where it's 1 because the threads are (mostly) independent. |
| 2748 | */ |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 2749 | controlled_threads = threads_per_vcore(vc->kvm); |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 2750 | |
| 2751 | /* |
Michael Ellerman | 3102f78 | 2014-05-23 18:15:29 +1000 | [diff] [blame] | 2752 | * Make sure we are running on primary threads, and that secondary |
| 2753 | * threads are offline. Also check if the number of threads in this |
| 2754 | * guest are greater than the current system threads per guest. |
Paul Mackerras | c010150 | 2017-10-19 14:11:23 +1100 | [diff] [blame] | 2755 | * On POWER9, we need to be not in independent-threads mode if |
Paul Mackerras | 00608e1 | 2018-01-11 16:54:26 +1100 | [diff] [blame] | 2756 | * this is a HPT guest on a radix host machine where the |
| 2757 | * CPU threads may not be in different MMU modes. |
Paul Mackerras | 7b444c6 | 2012-10-15 01:16:14 +0000 | [diff] [blame] | 2758 | */ |
Paul Mackerras | 00608e1 | 2018-01-11 16:54:26 +1100 | [diff] [blame] | 2759 | hpt_on_radix = no_mixing_hpt_and_radix && radix_enabled() && |
| 2760 | !kvm_is_radix(vc->kvm); |
Paul Mackerras | c010150 | 2017-10-19 14:11:23 +1100 | [diff] [blame] | 2761 | if (((controlled_threads > 1) && |
| 2762 | ((vc->num_threads > threads_per_subcore) || !on_primary_thread())) || |
| 2763 | (hpt_on_radix && vc->kvm->arch.threads_indep)) { |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 2764 | for_each_runnable_thread(i, vcpu, vc) { |
Paul Mackerras | 7b444c6 | 2012-10-15 01:16:14 +0000 | [diff] [blame] | 2765 | vcpu->arch.ret = -EBUSY; |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 2766 | kvmppc_remove_runnable(vc, vcpu); |
| 2767 | wake_up(&vcpu->arch.cpu_run); |
| 2768 | } |
Paul Mackerras | 7b444c6 | 2012-10-15 01:16:14 +0000 | [diff] [blame] | 2769 | goto out; |
| 2770 | } |
| 2771 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2772 | /* |
| 2773 | * See if we could run any other vcores on the physical core |
| 2774 | * along with this one. |
| 2775 | */ |
| 2776 | init_core_info(&core_info, vc); |
| 2777 | pcpu = smp_processor_id(); |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 2778 | target_threads = controlled_threads; |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 2779 | if (target_smt_mode && target_smt_mode < target_threads) |
| 2780 | target_threads = target_smt_mode; |
| 2781 | if (vc->num_threads < target_threads) |
| 2782 | collect_piggybacks(&core_info, target_threads); |
Michael Ellerman | 3102f78 | 2014-05-23 18:15:29 +1000 | [diff] [blame] | 2783 | |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 2784 | /* |
| 2785 | * On radix, arrange for TLB flushing if necessary. |
| 2786 | * This has to be done before disabling interrupts since |
| 2787 | * it uses smp_call_function(). |
| 2788 | */ |
| 2789 | pcpu = smp_processor_id(); |
| 2790 | if (kvm_is_radix(vc->kvm)) { |
| 2791 | for (sub = 0; sub < core_info.n_subcores; ++sub) |
| 2792 | for_each_runnable_thread(i, vcpu, core_info.vc[sub]) |
| 2793 | kvmppc_prepare_radix_vcpu(vcpu, pcpu); |
| 2794 | } |
| 2795 | |
| 2796 | /* |
| 2797 | * Hard-disable interrupts, and check resched flag and signals. |
| 2798 | * If we need to reschedule or deliver a signal, clean up |
| 2799 | * and return without going into the guest(s). |
Paul Mackerras | 072df81 | 2017-11-09 14:30:24 +1100 | [diff] [blame] | 2800 | * If the mmu_ready flag has been cleared, don't go into the |
Paul Mackerras | 38c53af | 2017-11-08 14:44:04 +1100 | [diff] [blame] | 2801 | * guest because that means a HPT resize operation is in progress. |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 2802 | */ |
| 2803 | local_irq_disable(); |
| 2804 | hard_irq_disable(); |
| 2805 | if (lazy_irq_pending() || need_resched() || |
Paul Mackerras | 072df81 | 2017-11-09 14:30:24 +1100 | [diff] [blame] | 2806 | recheck_signals(&core_info) || !vc->kvm->arch.mmu_ready) { |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 2807 | local_irq_enable(); |
| 2808 | vc->vcore_state = VCORE_INACTIVE; |
| 2809 | /* Unlock all except the primary vcore */ |
| 2810 | for (sub = 1; sub < core_info.n_subcores; ++sub) { |
| 2811 | pvc = core_info.vc[sub]; |
| 2812 | /* Put back on to the preempted vcores list */ |
| 2813 | kvmppc_vcore_preempt(pvc); |
| 2814 | spin_unlock(&pvc->lock); |
| 2815 | } |
| 2816 | for (i = 0; i < controlled_threads; ++i) |
| 2817 | kvmppc_release_hwthread(pcpu + i); |
| 2818 | return; |
| 2819 | } |
| 2820 | |
| 2821 | kvmppc_clear_host_core(pcpu); |
| 2822 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2823 | /* Decide on micro-threading (split-core) mode */ |
| 2824 | subcore_size = threads_per_subcore; |
| 2825 | cmd_bit = stat_bit = 0; |
| 2826 | split = core_info.n_subcores; |
| 2827 | sip = NULL; |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 2828 | is_power8 = cpu_has_feature(CPU_FTR_ARCH_207S) |
| 2829 | && !cpu_has_feature(CPU_FTR_ARCH_300); |
| 2830 | |
Paul Mackerras | c010150 | 2017-10-19 14:11:23 +1100 | [diff] [blame] | 2831 | if (split > 1 || hpt_on_radix) { |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2832 | sip = &split_info; |
| 2833 | memset(&split_info, 0, sizeof(split_info)); |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2834 | for (sub = 0; sub < core_info.n_subcores; ++sub) |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 2835 | split_info.vc[sub] = core_info.vc[sub]; |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 2836 | |
| 2837 | if (is_power8) { |
| 2838 | if (split == 2 && (dynamic_mt_modes & 2)) { |
| 2839 | cmd_bit = HID0_POWER8_1TO2LPAR; |
| 2840 | stat_bit = HID0_POWER8_2LPARMODE; |
| 2841 | } else { |
| 2842 | split = 4; |
| 2843 | cmd_bit = HID0_POWER8_1TO4LPAR; |
| 2844 | stat_bit = HID0_POWER8_4LPARMODE; |
| 2845 | } |
| 2846 | subcore_size = MAX_SMT_THREADS / split; |
| 2847 | split_info.rpr = mfspr(SPRN_RPR); |
| 2848 | split_info.pmmar = mfspr(SPRN_PMMAR); |
| 2849 | split_info.ldbar = mfspr(SPRN_LDBAR); |
| 2850 | split_info.subcore_size = subcore_size; |
| 2851 | } else { |
| 2852 | split_info.subcore_size = 1; |
Paul Mackerras | c010150 | 2017-10-19 14:11:23 +1100 | [diff] [blame] | 2853 | if (hpt_on_radix) { |
| 2854 | /* Use the split_info for LPCR/LPIDR changes */ |
| 2855 | split_info.lpcr_req = vc->lpcr; |
| 2856 | split_info.lpidr_req = vc->kvm->arch.lpid; |
| 2857 | split_info.host_lpcr = vc->kvm->arch.host_lpcr; |
| 2858 | split_info.do_set = 1; |
| 2859 | } |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 2860 | } |
| 2861 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2862 | /* order writes to split_info before kvm_split_mode pointer */ |
| 2863 | smp_wmb(); |
| 2864 | } |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2865 | |
Paul Mackerras | c010150 | 2017-10-19 14:11:23 +1100 | [diff] [blame] | 2866 | for (thr = 0; thr < controlled_threads; ++thr) { |
Nicholas Piggin | d2e6007 | 2018-02-14 01:08:12 +1000 | [diff] [blame] | 2867 | struct paca_struct *paca = paca_ptrs[pcpu + thr]; |
| 2868 | |
| 2869 | paca->kvm_hstate.tid = thr; |
| 2870 | paca->kvm_hstate.napping = 0; |
| 2871 | paca->kvm_hstate.kvm_split_mode = sip; |
Paul Mackerras | c010150 | 2017-10-19 14:11:23 +1100 | [diff] [blame] | 2872 | } |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2873 | |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 2874 | /* Initiate micro-threading (split-core) on POWER8 if required */ |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2875 | if (cmd_bit) { |
| 2876 | unsigned long hid0 = mfspr(SPRN_HID0); |
| 2877 | |
| 2878 | hid0 |= cmd_bit | HID0_POWER8_DYNLPARDIS; |
| 2879 | mb(); |
| 2880 | mtspr(SPRN_HID0, hid0); |
| 2881 | isync(); |
| 2882 | for (;;) { |
| 2883 | hid0 = mfspr(SPRN_HID0); |
| 2884 | if (hid0 & stat_bit) |
| 2885 | break; |
| 2886 | cpu_relax(); |
| 2887 | } |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 2888 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2889 | |
Paul Mackerras | 7aa1584 | 2018-04-20 19:53:22 +1000 | [diff] [blame] | 2890 | /* |
| 2891 | * On POWER8, set RWMR register. |
| 2892 | * Since it only affects PURR and SPURR, it doesn't affect |
| 2893 | * the host, so we don't save/restore the host value. |
| 2894 | */ |
| 2895 | if (is_power8) { |
| 2896 | unsigned long rwmr_val = RWMR_RPA_P8_8THREAD; |
| 2897 | int n_online = atomic_read(&vc->online_count); |
| 2898 | |
| 2899 | /* |
| 2900 | * Use the 8-thread value if we're doing split-core |
| 2901 | * or if the vcore's online count looks bogus. |
| 2902 | */ |
| 2903 | if (split == 1 && threads_per_subcore == MAX_SMT_THREADS && |
| 2904 | n_online >= 1 && n_online <= MAX_SMT_THREADS) |
| 2905 | rwmr_val = p8_rwmr_values[n_online]; |
| 2906 | mtspr(SPRN_RWMR, rwmr_val); |
| 2907 | } |
| 2908 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2909 | /* Start all the threads */ |
| 2910 | active = 0; |
| 2911 | for (sub = 0; sub < core_info.n_subcores; ++sub) { |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 2912 | thr = is_power8 ? subcore_thread_map[sub] : sub; |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2913 | thr0_done = false; |
| 2914 | active |= 1 << thr; |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 2915 | pvc = core_info.vc[sub]; |
| 2916 | pvc->pcpu = pcpu + thr; |
| 2917 | for_each_runnable_thread(i, vcpu, pvc) { |
| 2918 | kvmppc_start_thread(vcpu, pvc); |
| 2919 | kvmppc_create_dtl_entry(vcpu, pvc); |
| 2920 | trace_kvm_guest_enter(vcpu); |
| 2921 | if (!vcpu->arch.ptid) |
| 2922 | thr0_done = true; |
| 2923 | active |= 1 << (thr + vcpu->arch.ptid); |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2924 | } |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 2925 | /* |
| 2926 | * We need to start the first thread of each subcore |
| 2927 | * even if it doesn't have a vcpu. |
| 2928 | */ |
| 2929 | if (!thr0_done) |
| 2930 | kvmppc_start_thread(NULL, pvc); |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2931 | } |
Gautham R. Shenoy | 7f23532 | 2015-09-02 21:48:58 +0530 | [diff] [blame] | 2932 | |
| 2933 | /* |
| 2934 | * Ensure that split_info.do_nap is set after setting |
| 2935 | * the vcore pointer in the PACA of the secondaries. |
| 2936 | */ |
| 2937 | smp_mb(); |
Gautham R. Shenoy | 7f23532 | 2015-09-02 21:48:58 +0530 | [diff] [blame] | 2938 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2939 | /* |
| 2940 | * When doing micro-threading, poke the inactive threads as well. |
| 2941 | * This gets them to the nap instruction after kvm_do_nap, |
| 2942 | * which reduces the time taken to unsplit later. |
Paul Mackerras | c010150 | 2017-10-19 14:11:23 +1100 | [diff] [blame] | 2943 | * For POWER9 HPT guest on radix host, we need all the secondary |
| 2944 | * threads woken up so they can do the LPCR/LPIDR change. |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2945 | */ |
Paul Mackerras | c010150 | 2017-10-19 14:11:23 +1100 | [diff] [blame] | 2946 | if (cmd_bit || hpt_on_radix) { |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 2947 | split_info.do_nap = 1; /* ask secondaries to nap when done */ |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2948 | for (thr = 1; thr < threads_per_subcore; ++thr) |
| 2949 | if (!(active & (1 << thr))) |
| 2950 | kvmppc_ipi_thread(pcpu + thr); |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 2951 | } |
Paul Mackerras | e0b7ec0 | 2014-01-08 21:25:20 +1100 | [diff] [blame] | 2952 | |
Paul Mackerras | 2f12f03 | 2012-10-15 01:17:17 +0000 | [diff] [blame] | 2953 | vc->vcore_state = VCORE_RUNNING; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 2954 | preempt_disable(); |
Suresh E. Warrier | 3c78f78 | 2014-12-03 18:48:10 -0600 | [diff] [blame] | 2955 | |
| 2956 | trace_kvmppc_run_core(vc, 0); |
| 2957 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 2958 | for (sub = 0; sub < core_info.n_subcores; ++sub) |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 2959 | spin_unlock(&core_info.vc[sub]->lock); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2960 | |
Nicholas Piggin | 9a4506e | 2018-05-17 17:06:29 +1000 | [diff] [blame] | 2961 | if (kvm_is_radix(vc->kvm)) { |
| 2962 | int tmp = pcpu; |
| 2963 | |
| 2964 | /* |
| 2965 | * Do we need to flush the process scoped TLB for the LPAR? |
| 2966 | * |
| 2967 | * On POWER9, individual threads can come in here, but the |
| 2968 | * TLB is shared between the 4 threads in a core, hence |
| 2969 | * invalidating on one thread invalidates for all. |
| 2970 | * Thus we make all 4 threads use the same bit here. |
| 2971 | * |
| 2972 | * Hash must be flushed in realmode in order to use tlbiel. |
| 2973 | */ |
| 2974 | mtspr(SPRN_LPID, vc->kvm->arch.lpid); |
| 2975 | isync(); |
| 2976 | |
| 2977 | if (cpu_has_feature(CPU_FTR_ARCH_300)) |
| 2978 | tmp &= ~0x3UL; |
| 2979 | |
| 2980 | if (cpumask_test_cpu(tmp, &vc->kvm->arch.need_tlb_flush)) { |
| 2981 | radix__local_flush_tlb_lpid_guest(vc->kvm->arch.lpid); |
| 2982 | /* Clear the bit after the TLB flush */ |
| 2983 | cpumask_clear_cpu(tmp, &vc->kvm->arch.need_tlb_flush); |
| 2984 | } |
| 2985 | } |
| 2986 | |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 2987 | /* |
| 2988 | * Interrupts will be enabled once we get into the guest, |
| 2989 | * so tell lockdep that we're about to enable interrupts. |
| 2990 | */ |
| 2991 | trace_hardirqs_on(); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2992 | |
Laurent Vivier | 61bd0f66 | 2018-03-02 11:51:56 +0100 | [diff] [blame] | 2993 | guest_enter_irqoff(); |
Paul Mackerras | 2c9097e | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 2994 | |
Paul Mackerras | e0b7ec0 | 2014-01-08 21:25:20 +1100 | [diff] [blame] | 2995 | srcu_idx = srcu_read_lock(&vc->kvm->srcu); |
Paul Mackerras | 2c9097e | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 2996 | |
Naveen N. Rao | a4bc64d | 2018-04-19 12:34:05 +0530 | [diff] [blame] | 2997 | this_cpu_disable_ftrace(); |
| 2998 | |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 2999 | trap = __kvmppc_vcore_entry(); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3000 | |
Naveen N. Rao | a4bc64d | 2018-04-19 12:34:05 +0530 | [diff] [blame] | 3001 | this_cpu_enable_ftrace(); |
| 3002 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3003 | srcu_read_unlock(&vc->kvm->srcu, srcu_idx); |
| 3004 | |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 3005 | trace_hardirqs_off(); |
| 3006 | set_irq_happened(trap); |
| 3007 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3008 | spin_lock(&vc->lock); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3009 | /* prevent other vcpu threads from doing kvmppc_start_thread() now */ |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3010 | vc->vcore_state = VCORE_EXITING; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3011 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3012 | /* wait for secondary threads to finish writing their state to memory */ |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 3013 | kvmppc_wait_for_nap(controlled_threads); |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3014 | |
| 3015 | /* Return to whole-core mode if we split the core earlier */ |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 3016 | if (cmd_bit) { |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3017 | unsigned long hid0 = mfspr(SPRN_HID0); |
| 3018 | unsigned long loops = 0; |
| 3019 | |
| 3020 | hid0 &= ~HID0_POWER8_DYNLPARDIS; |
| 3021 | stat_bit = HID0_POWER8_2LPARMODE | HID0_POWER8_4LPARMODE; |
| 3022 | mb(); |
| 3023 | mtspr(SPRN_HID0, hid0); |
| 3024 | isync(); |
| 3025 | for (;;) { |
| 3026 | hid0 = mfspr(SPRN_HID0); |
| 3027 | if (!(hid0 & stat_bit)) |
| 3028 | break; |
| 3029 | cpu_relax(); |
| 3030 | ++loops; |
| 3031 | } |
Paul Mackerras | c010150 | 2017-10-19 14:11:23 +1100 | [diff] [blame] | 3032 | } else if (hpt_on_radix) { |
| 3033 | /* Wait for all threads to have seen final sync */ |
| 3034 | for (thr = 1; thr < controlled_threads; ++thr) { |
Nicholas Piggin | d2e6007 | 2018-02-14 01:08:12 +1000 | [diff] [blame] | 3035 | struct paca_struct *paca = paca_ptrs[pcpu + thr]; |
| 3036 | |
| 3037 | while (paca->kvm_hstate.kvm_split_mode) { |
Paul Mackerras | c010150 | 2017-10-19 14:11:23 +1100 | [diff] [blame] | 3038 | HMT_low(); |
| 3039 | barrier(); |
| 3040 | } |
| 3041 | HMT_medium(); |
| 3042 | } |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3043 | } |
Paul Mackerras | c010150 | 2017-10-19 14:11:23 +1100 | [diff] [blame] | 3044 | split_info.do_nap = 0; |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3045 | |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 3046 | kvmppc_set_host_core(pcpu); |
| 3047 | |
| 3048 | local_irq_enable(); |
Laurent Vivier | 61bd0f66 | 2018-03-02 11:51:56 +0100 | [diff] [blame] | 3049 | guest_exit(); |
Paul Mackerras | 8b24e69 | 2017-06-26 15:45:51 +1000 | [diff] [blame] | 3050 | |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3051 | /* Let secondaries go back to the offline loop */ |
Paul Mackerras | 45c940b | 2016-11-18 17:43:30 +1100 | [diff] [blame] | 3052 | for (i = 0; i < controlled_threads; ++i) { |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3053 | kvmppc_release_hwthread(pcpu + i); |
| 3054 | if (sip && sip->napped[i]) |
| 3055 | kvmppc_ipi_thread(pcpu + i); |
Paul Mackerras | a29ebea | 2017-01-30 21:21:50 +1100 | [diff] [blame] | 3056 | cpumask_clear_cpu(pcpu + i, &vc->kvm->arch.cpu_in_guest); |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3057 | } |
| 3058 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3059 | spin_unlock(&vc->lock); |
Paul Mackerras | 2c9097e | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 3060 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3061 | /* make sure updates to secondary vcpu structs are visible now */ |
| 3062 | smp_mb(); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 3063 | |
Paul Mackerras | 36ee41d | 2018-01-30 10:51:32 +1100 | [diff] [blame] | 3064 | preempt_enable(); |
| 3065 | |
Paul Mackerras | 898b25b | 2017-06-22 15:08:42 +1000 | [diff] [blame] | 3066 | for (sub = 0; sub < core_info.n_subcores; ++sub) { |
| 3067 | pvc = core_info.vc[sub]; |
| 3068 | post_guest_process(pvc, pvc == vc); |
| 3069 | } |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 3070 | |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 3071 | spin_lock(&vc->lock); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 3072 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 3073 | out: |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3074 | vc->vcore_state = VCORE_INACTIVE; |
Suresh E. Warrier | 3c78f78 | 2014-12-03 18:48:10 -0600 | [diff] [blame] | 3075 | trace_kvmppc_run_core(vc, 1); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3076 | } |
| 3077 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3078 | /* |
| 3079 | * Wait for some other vcpu thread to execute us, and |
| 3080 | * wake us up when we need to handle something in the host. |
| 3081 | */ |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3082 | static void kvmppc_wait_for_exec(struct kvmppc_vcore *vc, |
| 3083 | struct kvm_vcpu *vcpu, int wait_state) |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3084 | { |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3085 | DEFINE_WAIT(wait); |
| 3086 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3087 | prepare_to_wait(&vcpu->arch.cpu_run, &wait, wait_state); |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3088 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) { |
| 3089 | spin_unlock(&vc->lock); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3090 | schedule(); |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3091 | spin_lock(&vc->lock); |
| 3092 | } |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3093 | finish_wait(&vcpu->arch.cpu_run, &wait); |
| 3094 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3095 | |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 3096 | static void grow_halt_poll_ns(struct kvmppc_vcore *vc) |
| 3097 | { |
| 3098 | /* 10us base */ |
| 3099 | if (vc->halt_poll_ns == 0 && halt_poll_ns_grow) |
| 3100 | vc->halt_poll_ns = 10000; |
| 3101 | else |
| 3102 | vc->halt_poll_ns *= halt_poll_ns_grow; |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 3103 | } |
| 3104 | |
| 3105 | static void shrink_halt_poll_ns(struct kvmppc_vcore *vc) |
| 3106 | { |
| 3107 | if (halt_poll_ns_shrink == 0) |
| 3108 | vc->halt_poll_ns = 0; |
| 3109 | else |
| 3110 | vc->halt_poll_ns /= halt_poll_ns_shrink; |
| 3111 | } |
| 3112 | |
Paul Mackerras | ee3308a | 2017-06-20 15:46:12 +1000 | [diff] [blame] | 3113 | #ifdef CONFIG_KVM_XICS |
| 3114 | static inline bool xive_interrupt_pending(struct kvm_vcpu *vcpu) |
| 3115 | { |
| 3116 | if (!xive_enabled()) |
| 3117 | return false; |
Benjamin Herrenschmidt | 2267ea7 | 2018-01-12 13:37:13 +1100 | [diff] [blame] | 3118 | return vcpu->arch.irq_pending || vcpu->arch.xive_saved_state.pipr < |
Paul Mackerras | ee3308a | 2017-06-20 15:46:12 +1000 | [diff] [blame] | 3119 | vcpu->arch.xive_saved_state.cppr; |
| 3120 | } |
| 3121 | #else |
| 3122 | static inline bool xive_interrupt_pending(struct kvm_vcpu *vcpu) |
| 3123 | { |
| 3124 | return false; |
| 3125 | } |
| 3126 | #endif /* CONFIG_KVM_XICS */ |
| 3127 | |
Paul Mackerras | 1da4e2f | 2017-05-19 16:26:16 +1000 | [diff] [blame] | 3128 | static bool kvmppc_vcpu_woken(struct kvm_vcpu *vcpu) |
| 3129 | { |
| 3130 | if (vcpu->arch.pending_exceptions || vcpu->arch.prodded || |
Paul Mackerras | ee3308a | 2017-06-20 15:46:12 +1000 | [diff] [blame] | 3131 | kvmppc_doorbell_pending(vcpu) || xive_interrupt_pending(vcpu)) |
Paul Mackerras | 1da4e2f | 2017-05-19 16:26:16 +1000 | [diff] [blame] | 3132 | return true; |
| 3133 | |
| 3134 | return false; |
| 3135 | } |
| 3136 | |
Suraj Jitindar Singh | 908a093 | 2016-10-14 11:53:23 +1100 | [diff] [blame] | 3137 | /* |
| 3138 | * Check to see if any of the runnable vcpus on the vcore have pending |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 3139 | * exceptions or are no longer ceded |
| 3140 | */ |
| 3141 | static int kvmppc_vcore_check_block(struct kvmppc_vcore *vc) |
| 3142 | { |
| 3143 | struct kvm_vcpu *vcpu; |
| 3144 | int i; |
| 3145 | |
| 3146 | for_each_runnable_thread(i, vcpu, vc) { |
Paul Mackerras | 1da4e2f | 2017-05-19 16:26:16 +1000 | [diff] [blame] | 3147 | if (!vcpu->arch.ceded || kvmppc_vcpu_woken(vcpu)) |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 3148 | return 1; |
| 3149 | } |
| 3150 | |
| 3151 | return 0; |
| 3152 | } |
| 3153 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3154 | /* |
| 3155 | * All the vcpus in this vcore are idle, so wait for a decrementer |
| 3156 | * or external interrupt to one of the vcpus. vc->lock is held. |
| 3157 | */ |
| 3158 | static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc) |
| 3159 | { |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 3160 | ktime_t cur, start_poll, start_wait; |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 3161 | int do_sleep = 1; |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 3162 | u64 block_ns; |
Marcelo Tosatti | 8577370 | 2016-02-19 09:46:39 +0100 | [diff] [blame] | 3163 | DECLARE_SWAITQUEUE(wait); |
Suresh E. Warrier | 1bc5d59 | 2014-11-03 15:52:00 +1100 | [diff] [blame] | 3164 | |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 3165 | /* Poll for pending exceptions and ceded state */ |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 3166 | cur = start_poll = ktime_get(); |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 3167 | if (vc->halt_poll_ns) { |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 3168 | ktime_t stop = ktime_add_ns(start_poll, vc->halt_poll_ns); |
| 3169 | ++vc->runner->stat.halt_attempted_poll; |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 3170 | |
| 3171 | vc->vcore_state = VCORE_POLLING; |
| 3172 | spin_unlock(&vc->lock); |
| 3173 | |
| 3174 | do { |
| 3175 | if (kvmppc_vcore_check_block(vc)) { |
| 3176 | do_sleep = 0; |
| 3177 | break; |
| 3178 | } |
| 3179 | cur = ktime_get(); |
| 3180 | } while (single_task_running() && ktime_before(cur, stop)); |
| 3181 | |
| 3182 | spin_lock(&vc->lock); |
| 3183 | vc->vcore_state = VCORE_INACTIVE; |
| 3184 | |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 3185 | if (!do_sleep) { |
| 3186 | ++vc->runner->stat.halt_successful_poll; |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 3187 | goto out; |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 3188 | } |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 3189 | } |
| 3190 | |
Marcelo Tosatti | 8577370 | 2016-02-19 09:46:39 +0100 | [diff] [blame] | 3191 | prepare_to_swait(&vc->wq, &wait, TASK_INTERRUPTIBLE); |
Suresh E. Warrier | 1bc5d59 | 2014-11-03 15:52:00 +1100 | [diff] [blame] | 3192 | |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 3193 | if (kvmppc_vcore_check_block(vc)) { |
Marcelo Tosatti | 8577370 | 2016-02-19 09:46:39 +0100 | [diff] [blame] | 3194 | finish_swait(&vc->wq, &wait); |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 3195 | do_sleep = 0; |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 3196 | /* If we polled, count this as a successful poll */ |
| 3197 | if (vc->halt_poll_ns) |
| 3198 | ++vc->runner->stat.halt_successful_poll; |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 3199 | goto out; |
Suresh E. Warrier | 1bc5d59 | 2014-11-03 15:52:00 +1100 | [diff] [blame] | 3200 | } |
| 3201 | |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 3202 | start_wait = ktime_get(); |
| 3203 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3204 | vc->vcore_state = VCORE_SLEEPING; |
Suresh E. Warrier | 3c78f78 | 2014-12-03 18:48:10 -0600 | [diff] [blame] | 3205 | trace_kvmppc_vcore_blocked(vc, 0); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3206 | spin_unlock(&vc->lock); |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 3207 | schedule(); |
Marcelo Tosatti | 8577370 | 2016-02-19 09:46:39 +0100 | [diff] [blame] | 3208 | finish_swait(&vc->wq, &wait); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3209 | spin_lock(&vc->lock); |
| 3210 | vc->vcore_state = VCORE_INACTIVE; |
Suresh E. Warrier | 3c78f78 | 2014-12-03 18:48:10 -0600 | [diff] [blame] | 3211 | trace_kvmppc_vcore_blocked(vc, 1); |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 3212 | ++vc->runner->stat.halt_successful_wait; |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 3213 | |
| 3214 | cur = ktime_get(); |
| 3215 | |
| 3216 | out: |
Suraj Jitindar Singh | 2a27f51 | 2016-08-02 14:03:23 +1000 | [diff] [blame] | 3217 | block_ns = ktime_to_ns(cur) - ktime_to_ns(start_poll); |
| 3218 | |
| 3219 | /* Attribute wait time */ |
| 3220 | if (do_sleep) { |
| 3221 | vc->runner->stat.halt_wait_ns += |
| 3222 | ktime_to_ns(cur) - ktime_to_ns(start_wait); |
| 3223 | /* Attribute failed poll time */ |
| 3224 | if (vc->halt_poll_ns) |
| 3225 | vc->runner->stat.halt_poll_fail_ns += |
| 3226 | ktime_to_ns(start_wait) - |
| 3227 | ktime_to_ns(start_poll); |
| 3228 | } else { |
| 3229 | /* Attribute successful poll time */ |
| 3230 | if (vc->halt_poll_ns) |
| 3231 | vc->runner->stat.halt_poll_success_ns += |
| 3232 | ktime_to_ns(cur) - |
| 3233 | ktime_to_ns(start_poll); |
| 3234 | } |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 3235 | |
| 3236 | /* Adjust poll time */ |
Suraj Jitindar Singh | 307d93e | 2016-10-14 11:53:20 +1100 | [diff] [blame] | 3237 | if (halt_poll_ns) { |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 3238 | if (block_ns <= vc->halt_poll_ns) |
| 3239 | ; |
| 3240 | /* We slept and blocked for longer than the max halt time */ |
Suraj Jitindar Singh | 307d93e | 2016-10-14 11:53:20 +1100 | [diff] [blame] | 3241 | else if (vc->halt_poll_ns && block_ns > halt_poll_ns) |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 3242 | shrink_halt_poll_ns(vc); |
| 3243 | /* We slept and our poll time is too small */ |
Suraj Jitindar Singh | 307d93e | 2016-10-14 11:53:20 +1100 | [diff] [blame] | 3244 | else if (vc->halt_poll_ns < halt_poll_ns && |
| 3245 | block_ns < halt_poll_ns) |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 3246 | grow_halt_poll_ns(vc); |
Suraj Jitindar Singh | e03f392 | 2016-10-14 11:53:21 +1100 | [diff] [blame] | 3247 | if (vc->halt_poll_ns > halt_poll_ns) |
| 3248 | vc->halt_poll_ns = halt_poll_ns; |
Suraj Jitindar Singh | 0cda69d | 2016-08-02 14:03:21 +1000 | [diff] [blame] | 3249 | } else |
| 3250 | vc->halt_poll_ns = 0; |
| 3251 | |
| 3252 | trace_kvmppc_vcore_wakeup(do_sleep, block_ns); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3253 | } |
| 3254 | |
Paul Mackerras | 432953b | 2017-11-09 15:37:10 +1100 | [diff] [blame] | 3255 | static int kvmhv_setup_mmu(struct kvm_vcpu *vcpu) |
| 3256 | { |
| 3257 | int r = 0; |
| 3258 | struct kvm *kvm = vcpu->kvm; |
| 3259 | |
| 3260 | mutex_lock(&kvm->lock); |
| 3261 | if (!kvm->arch.mmu_ready) { |
| 3262 | if (!kvm_is_radix(kvm)) |
| 3263 | r = kvmppc_hv_setup_htab_rma(vcpu); |
| 3264 | if (!r) { |
| 3265 | if (cpu_has_feature(CPU_FTR_ARCH_300)) |
| 3266 | kvmppc_setup_partition_table(kvm); |
| 3267 | kvm->arch.mmu_ready = 1; |
| 3268 | } |
| 3269 | } |
| 3270 | mutex_unlock(&kvm->lock); |
| 3271 | return r; |
| 3272 | } |
| 3273 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3274 | static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) |
| 3275 | { |
Paul Mackerras | 38c53af | 2017-11-08 14:44:04 +1100 | [diff] [blame] | 3276 | int n_ceded, i, r; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3277 | struct kvmppc_vcore *vc; |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 3278 | struct kvm_vcpu *v; |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 3279 | |
Suresh E. Warrier | 3c78f78 | 2014-12-03 18:48:10 -0600 | [diff] [blame] | 3280 | trace_kvmppc_run_vcpu_enter(vcpu); |
| 3281 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3282 | kvm_run->exit_reason = 0; |
| 3283 | vcpu->arch.ret = RESUME_GUEST; |
| 3284 | vcpu->arch.trap = 0; |
Paul Mackerras | 2f12f03 | 2012-10-15 01:17:17 +0000 | [diff] [blame] | 3285 | kvmppc_update_vpas(vcpu); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3286 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3287 | /* |
| 3288 | * Synchronize with other threads in this virtual core |
| 3289 | */ |
| 3290 | vc = vcpu->arch.vcore; |
| 3291 | spin_lock(&vc->lock); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3292 | vcpu->arch.ceded = 0; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3293 | vcpu->arch.run_task = current; |
| 3294 | vcpu->arch.kvm_run = kvm_run; |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 3295 | vcpu->arch.stolen_logged = vcore_stolen_time(vc, mftb()); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3296 | vcpu->arch.state = KVMPPC_VCPU_RUNNABLE; |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 3297 | vcpu->arch.busy_preempt = TB_NIL; |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 3298 | WRITE_ONCE(vc->runnable_threads[vcpu->arch.ptid], vcpu); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3299 | ++vc->n_runnable; |
| 3300 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3301 | /* |
| 3302 | * This happens the first time this is called for a vcpu. |
| 3303 | * If the vcore is already running, we may be able to start |
| 3304 | * this thread straight away and have it join in. |
| 3305 | */ |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 3306 | if (!signal_pending(current)) { |
Paul Mackerras | c0093f1 | 2017-11-20 16:12:25 +1100 | [diff] [blame] | 3307 | if ((vc->vcore_state == VCORE_PIGGYBACK || |
| 3308 | vc->vcore_state == VCORE_RUNNING) && |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3309 | !VCORE_IS_EXITING(vc)) { |
Paul Mackerras | 2f12f03 | 2012-10-15 01:17:17 +0000 | [diff] [blame] | 3310 | kvmppc_create_dtl_entry(vcpu, vc); |
Paul Mackerras | b4deba5 | 2015-07-02 20:38:16 +1000 | [diff] [blame] | 3311 | kvmppc_start_thread(vcpu, vc); |
Suresh E. Warrier | 3c78f78 | 2014-12-03 18:48:10 -0600 | [diff] [blame] | 3312 | trace_kvm_guest_enter(vcpu); |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 3313 | } else if (vc->vcore_state == VCORE_SLEEPING) { |
Marcelo Tosatti | 8577370 | 2016-02-19 09:46:39 +0100 | [diff] [blame] | 3314 | swake_up(&vc->wq); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3315 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3316 | |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 3317 | } |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3318 | |
| 3319 | while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && |
| 3320 | !signal_pending(current)) { |
Paul Mackerras | 072df81 | 2017-11-09 14:30:24 +1100 | [diff] [blame] | 3321 | /* See if the MMU is ready to go */ |
| 3322 | if (!vcpu->kvm->arch.mmu_ready) { |
Paul Mackerras | 38c53af | 2017-11-08 14:44:04 +1100 | [diff] [blame] | 3323 | spin_unlock(&vc->lock); |
Paul Mackerras | 432953b | 2017-11-09 15:37:10 +1100 | [diff] [blame] | 3324 | r = kvmhv_setup_mmu(vcpu); |
Paul Mackerras | 38c53af | 2017-11-08 14:44:04 +1100 | [diff] [blame] | 3325 | spin_lock(&vc->lock); |
| 3326 | if (r) { |
| 3327 | kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY; |
Paul Mackerras | 432953b | 2017-11-09 15:37:10 +1100 | [diff] [blame] | 3328 | kvm_run->fail_entry. |
| 3329 | hardware_entry_failure_reason = 0; |
Paul Mackerras | 38c53af | 2017-11-08 14:44:04 +1100 | [diff] [blame] | 3330 | vcpu->arch.ret = r; |
| 3331 | break; |
| 3332 | } |
| 3333 | } |
| 3334 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3335 | if (vc->vcore_state == VCORE_PREEMPT && vc->runner == NULL) |
| 3336 | kvmppc_vcore_end_preempt(vc); |
| 3337 | |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 3338 | if (vc->vcore_state != VCORE_INACTIVE) { |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3339 | kvmppc_wait_for_exec(vc, vcpu, TASK_INTERRUPTIBLE); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3340 | continue; |
| 3341 | } |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 3342 | for_each_runnable_thread(i, v, vc) { |
Scott Wood | 7e28e60e | 2011-11-08 18:23:20 -0600 | [diff] [blame] | 3343 | kvmppc_core_prepare_to_enter(v); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3344 | if (signal_pending(v->arch.run_task)) { |
| 3345 | kvmppc_remove_runnable(vc, v); |
| 3346 | v->stat.signal_exits++; |
| 3347 | v->arch.kvm_run->exit_reason = KVM_EXIT_INTR; |
| 3348 | v->arch.ret = -EINTR; |
| 3349 | wake_up(&v->arch.cpu_run); |
| 3350 | } |
| 3351 | } |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 3352 | if (!vc->n_runnable || vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) |
| 3353 | break; |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 3354 | n_ceded = 0; |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 3355 | for_each_runnable_thread(i, v, vc) { |
Paul Mackerras | 1da4e2f | 2017-05-19 16:26:16 +1000 | [diff] [blame] | 3356 | if (!kvmppc_vcpu_woken(v)) |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 3357 | n_ceded += v->arch.ceded; |
Paul Mackerras | 4619ac8 | 2013-04-17 20:31:41 +0000 | [diff] [blame] | 3358 | else |
| 3359 | v->arch.ceded = 0; |
| 3360 | } |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 3361 | vc->runner = vcpu; |
| 3362 | if (n_ceded == vc->n_runnable) { |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 3363 | kvmppc_vcore_blocked(vc); |
Konstantin Khlebnikov | c56dadf | 2015-07-15 12:52:03 +0300 | [diff] [blame] | 3364 | } else if (need_resched()) { |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3365 | kvmppc_vcore_preempt(vc); |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 3366 | /* Let something else run */ |
| 3367 | cond_resched_lock(&vc->lock); |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3368 | if (vc->vcore_state == VCORE_PREEMPT) |
| 3369 | kvmppc_vcore_end_preempt(vc); |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 3370 | } else { |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 3371 | kvmppc_run_core(vc); |
Paul Mackerras | 25fedfc | 2015-03-28 14:21:05 +1100 | [diff] [blame] | 3372 | } |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 3373 | vc->runner = NULL; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3374 | } |
| 3375 | |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 3376 | while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && |
| 3377 | (vc->vcore_state == VCORE_RUNNING || |
Paul Mackerras | 5fc3e64 | 2015-09-18 13:13:44 +1000 | [diff] [blame] | 3378 | vc->vcore_state == VCORE_EXITING || |
| 3379 | vc->vcore_state == VCORE_PIGGYBACK)) |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 3380 | kvmppc_wait_for_exec(vc, vcpu, TASK_UNINTERRUPTIBLE); |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 3381 | |
Paul Mackerras | 5fc3e64 | 2015-09-18 13:13:44 +1000 | [diff] [blame] | 3382 | if (vc->vcore_state == VCORE_PREEMPT && vc->runner == NULL) |
| 3383 | kvmppc_vcore_end_preempt(vc); |
| 3384 | |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 3385 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) { |
| 3386 | kvmppc_remove_runnable(vc, vcpu); |
| 3387 | vcpu->stat.signal_exits++; |
| 3388 | kvm_run->exit_reason = KVM_EXIT_INTR; |
| 3389 | vcpu->arch.ret = -EINTR; |
| 3390 | } |
| 3391 | |
| 3392 | if (vc->n_runnable && vc->vcore_state == VCORE_INACTIVE) { |
| 3393 | /* Wake up some vcpu to run the core */ |
Suraj Jitindar Singh | 7b5f827 | 2016-08-02 14:03:20 +1000 | [diff] [blame] | 3394 | i = -1; |
| 3395 | v = next_runnable_thread(vc, &i); |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 3396 | wake_up(&v->arch.cpu_run); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3397 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3398 | |
Suresh E. Warrier | 3c78f78 | 2014-12-03 18:48:10 -0600 | [diff] [blame] | 3399 | trace_kvmppc_run_vcpu_exit(vcpu, kvm_run); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3400 | spin_unlock(&vc->lock); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 3401 | return vcpu->arch.ret; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 3402 | } |
| 3403 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 3404 | static int kvmppc_vcpu_run_hv(struct kvm_run *run, struct kvm_vcpu *vcpu) |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 3405 | { |
| 3406 | int r; |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 3407 | int srcu_idx; |
Paul Mackerras | ca8efa1 | 2017-06-06 16:47:22 +1000 | [diff] [blame] | 3408 | unsigned long ebb_regs[3] = {}; /* shut up GCC */ |
Paul Mackerras | 4c3bb4c | 2017-06-15 15:43:17 +1000 | [diff] [blame] | 3409 | unsigned long user_tar = 0; |
| 3410 | unsigned int user_vrsave; |
Paul Mackerras | 1b151ce | 2017-09-13 15:53:48 +1000 | [diff] [blame] | 3411 | struct kvm *kvm; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 3412 | |
Alexander Graf | af8f38b | 2011-08-10 13:57:08 +0200 | [diff] [blame] | 3413 | if (!vcpu->arch.sane) { |
| 3414 | run->exit_reason = KVM_EXIT_INTERNAL_ERROR; |
| 3415 | return -EINVAL; |
| 3416 | } |
| 3417 | |
Paul Mackerras | 46a704f | 2017-06-15 16:10:27 +1000 | [diff] [blame] | 3418 | /* |
| 3419 | * Don't allow entry with a suspended transaction, because |
| 3420 | * the guest entry/exit code will lose it. |
| 3421 | * If the guest has TM enabled, save away their TM-related SPRs |
| 3422 | * (they will get restored by the TM unavailable interrupt). |
| 3423 | */ |
| 3424 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
| 3425 | if (cpu_has_feature(CPU_FTR_TM) && current->thread.regs && |
| 3426 | (current->thread.regs->msr & MSR_TM)) { |
| 3427 | if (MSR_TM_ACTIVE(current->thread.regs->msr)) { |
| 3428 | run->exit_reason = KVM_EXIT_FAIL_ENTRY; |
| 3429 | run->fail_entry.hardware_entry_failure_reason = 0; |
| 3430 | return -EINVAL; |
| 3431 | } |
Paul Mackerras | e470571 | 2017-07-21 13:57:14 +1000 | [diff] [blame] | 3432 | /* Enable TM so we can read the TM SPRs */ |
| 3433 | mtmsr(mfmsr() | MSR_TM); |
Paul Mackerras | 46a704f | 2017-06-15 16:10:27 +1000 | [diff] [blame] | 3434 | current->thread.tm_tfhar = mfspr(SPRN_TFHAR); |
| 3435 | current->thread.tm_tfiar = mfspr(SPRN_TFIAR); |
| 3436 | current->thread.tm_texasr = mfspr(SPRN_TEXASR); |
| 3437 | current->thread.regs->msr &= ~MSR_TM; |
| 3438 | } |
| 3439 | #endif |
| 3440 | |
Paul Mackerras | 7aa1584 | 2018-04-20 19:53:22 +1000 | [diff] [blame] | 3441 | /* |
| 3442 | * Force online to 1 for the sake of old userspace which doesn't |
| 3443 | * set it. |
| 3444 | */ |
| 3445 | if (!vcpu->arch.online) { |
| 3446 | atomic_inc(&vcpu->arch.vcore->online_count); |
| 3447 | vcpu->arch.online = 1; |
| 3448 | } |
| 3449 | |
Scott Wood | 25051b5 | 2011-11-08 18:23:23 -0600 | [diff] [blame] | 3450 | kvmppc_core_prepare_to_enter(vcpu); |
| 3451 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3452 | /* No need to go into the guest when all we'll do is come back out */ |
| 3453 | if (signal_pending(current)) { |
| 3454 | run->exit_reason = KVM_EXIT_INTR; |
| 3455 | return -EINTR; |
| 3456 | } |
| 3457 | |
Paul Mackerras | 1b151ce | 2017-09-13 15:53:48 +1000 | [diff] [blame] | 3458 | kvm = vcpu->kvm; |
| 3459 | atomic_inc(&kvm->arch.vcpus_running); |
| 3460 | /* Order vcpus_running vs. mmu_ready, see kvmppc_alloc_reset_hpt */ |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 3461 | smp_mb(); |
| 3462 | |
Anton Blanchard | 579e633 | 2015-10-29 11:44:09 +1100 | [diff] [blame] | 3463 | flush_all_to_thread(current); |
| 3464 | |
Paul Mackerras | 4c3bb4c | 2017-06-15 15:43:17 +1000 | [diff] [blame] | 3465 | /* Save userspace EBB and other register values */ |
Paul Mackerras | ca8efa1 | 2017-06-06 16:47:22 +1000 | [diff] [blame] | 3466 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) { |
| 3467 | ebb_regs[0] = mfspr(SPRN_EBBHR); |
| 3468 | ebb_regs[1] = mfspr(SPRN_EBBRR); |
| 3469 | ebb_regs[2] = mfspr(SPRN_BESCR); |
Paul Mackerras | 4c3bb4c | 2017-06-15 15:43:17 +1000 | [diff] [blame] | 3470 | user_tar = mfspr(SPRN_TAR); |
Paul Mackerras | ca8efa1 | 2017-06-06 16:47:22 +1000 | [diff] [blame] | 3471 | } |
Paul Mackerras | 4c3bb4c | 2017-06-15 15:43:17 +1000 | [diff] [blame] | 3472 | user_vrsave = mfspr(SPRN_VRSAVE); |
Paul Mackerras | ca8efa1 | 2017-06-06 16:47:22 +1000 | [diff] [blame] | 3473 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3474 | vcpu->arch.wqp = &vcpu->arch.vcore->wq; |
Paul Mackerras | 342d3db | 2011-12-12 12:38:05 +0000 | [diff] [blame] | 3475 | vcpu->arch.pgdir = current->mm->pgd; |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 3476 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 3477 | |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 3478 | do { |
| 3479 | r = kvmppc_run_vcpu(run, vcpu); |
| 3480 | |
| 3481 | if (run->exit_reason == KVM_EXIT_PAPR_HCALL && |
| 3482 | !(vcpu->arch.shregs.msr & MSR_PR)) { |
Suresh E. Warrier | 3c78f78 | 2014-12-03 18:48:10 -0600 | [diff] [blame] | 3483 | trace_kvm_hcall_enter(vcpu); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 3484 | r = kvmppc_pseries_do_hcall(vcpu); |
Suresh E. Warrier | 3c78f78 | 2014-12-03 18:48:10 -0600 | [diff] [blame] | 3485 | trace_kvm_hcall_exit(vcpu, r); |
Scott Wood | 7e28e60e | 2011-11-08 18:23:20 -0600 | [diff] [blame] | 3486 | kvmppc_core_prepare_to_enter(vcpu); |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 3487 | } else if (r == RESUME_PAGE_FAULT) { |
Paul Mackerras | 432953b | 2017-11-09 15:37:10 +1100 | [diff] [blame] | 3488 | srcu_idx = srcu_read_lock(&kvm->srcu); |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 3489 | r = kvmppc_book3s_hv_page_fault(run, vcpu, |
| 3490 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); |
Paul Mackerras | 432953b | 2017-11-09 15:37:10 +1100 | [diff] [blame] | 3491 | srcu_read_unlock(&kvm->srcu, srcu_idx); |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 3492 | } else if (r == RESUME_PASSTHROUGH) { |
| 3493 | if (WARN_ON(xive_enabled())) |
| 3494 | r = H_SUCCESS; |
| 3495 | else |
| 3496 | r = kvmppc_xics_rm_complete(vcpu, 0); |
| 3497 | } |
Greg Kurz | e59d24e | 2014-02-06 17:36:56 +0100 | [diff] [blame] | 3498 | } while (is_kvmppc_resume_guest(r)); |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 3499 | |
Paul Mackerras | 4c3bb4c | 2017-06-15 15:43:17 +1000 | [diff] [blame] | 3500 | /* Restore userspace EBB and other register values */ |
Paul Mackerras | ca8efa1 | 2017-06-06 16:47:22 +1000 | [diff] [blame] | 3501 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) { |
| 3502 | mtspr(SPRN_EBBHR, ebb_regs[0]); |
| 3503 | mtspr(SPRN_EBBRR, ebb_regs[1]); |
| 3504 | mtspr(SPRN_BESCR, ebb_regs[2]); |
Paul Mackerras | 4c3bb4c | 2017-06-15 15:43:17 +1000 | [diff] [blame] | 3505 | mtspr(SPRN_TAR, user_tar); |
| 3506 | mtspr(SPRN_FSCR, current->thread.fscr); |
Paul Mackerras | ca8efa1 | 2017-06-06 16:47:22 +1000 | [diff] [blame] | 3507 | } |
Paul Mackerras | 4c3bb4c | 2017-06-15 15:43:17 +1000 | [diff] [blame] | 3508 | mtspr(SPRN_VRSAVE, user_vrsave); |
Paul Mackerras | ca8efa1 | 2017-06-06 16:47:22 +1000 | [diff] [blame] | 3509 | |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 3510 | vcpu->arch.state = KVMPPC_VCPU_NOTREADY; |
Paul Mackerras | 432953b | 2017-11-09 15:37:10 +1100 | [diff] [blame] | 3511 | atomic_dec(&kvm->arch.vcpus_running); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 3512 | return r; |
| 3513 | } |
| 3514 | |
Benjamin Herrenschmidt | 5b74716 | 2012-04-26 19:43:42 +0000 | [diff] [blame] | 3515 | static void kvmppc_add_seg_page_size(struct kvm_ppc_one_seg_page_size **sps, |
Paul Mackerras | 8dc6cca | 2017-09-11 15:29:45 +1000 | [diff] [blame] | 3516 | int shift, int sllp) |
Benjamin Herrenschmidt | 5b74716 | 2012-04-26 19:43:42 +0000 | [diff] [blame] | 3517 | { |
Paul Mackerras | 8dc6cca | 2017-09-11 15:29:45 +1000 | [diff] [blame] | 3518 | (*sps)->page_shift = shift; |
| 3519 | (*sps)->slb_enc = sllp; |
| 3520 | (*sps)->enc[0].page_shift = shift; |
| 3521 | (*sps)->enc[0].pte_enc = kvmppc_pgsize_lp_encoding(shift, shift); |
Aneesh Kumar K.V | 1f365bb | 2014-05-06 23:31:36 +0530 | [diff] [blame] | 3522 | /* |
Paul Mackerras | 8dc6cca | 2017-09-11 15:29:45 +1000 | [diff] [blame] | 3523 | * Add 16MB MPSS support (may get filtered out by userspace) |
Aneesh Kumar K.V | 1f365bb | 2014-05-06 23:31:36 +0530 | [diff] [blame] | 3524 | */ |
Paul Mackerras | 8dc6cca | 2017-09-11 15:29:45 +1000 | [diff] [blame] | 3525 | if (shift != 24) { |
| 3526 | int penc = kvmppc_pgsize_lp_encoding(shift, 24); |
| 3527 | if (penc != -1) { |
| 3528 | (*sps)->enc[1].page_shift = 24; |
| 3529 | (*sps)->enc[1].pte_enc = penc; |
| 3530 | } |
Aneesh Kumar K.V | 1f365bb | 2014-05-06 23:31:36 +0530 | [diff] [blame] | 3531 | } |
Benjamin Herrenschmidt | 5b74716 | 2012-04-26 19:43:42 +0000 | [diff] [blame] | 3532 | (*sps)++; |
| 3533 | } |
| 3534 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 3535 | static int kvm_vm_ioctl_get_smmu_info_hv(struct kvm *kvm, |
| 3536 | struct kvm_ppc_smmu_info *info) |
Benjamin Herrenschmidt | 5b74716 | 2012-04-26 19:43:42 +0000 | [diff] [blame] | 3537 | { |
| 3538 | struct kvm_ppc_one_seg_page_size *sps; |
| 3539 | |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 3540 | /* |
Paul Mackerras | e3bfed1 | 2017-08-25 19:53:39 +1000 | [diff] [blame] | 3541 | * POWER7, POWER8 and POWER9 all support 32 storage keys for data. |
| 3542 | * POWER7 doesn't support keys for instruction accesses, |
| 3543 | * POWER8 and POWER9 do. |
| 3544 | */ |
| 3545 | info->data_keys = 32; |
| 3546 | info->instr_keys = cpu_has_feature(CPU_FTR_ARCH_207S) ? 32 : 0; |
| 3547 | |
Paul Mackerras | 8dc6cca | 2017-09-11 15:29:45 +1000 | [diff] [blame] | 3548 | /* POWER7, 8 and 9 all have 1T segments and 32-entry SLB */ |
| 3549 | info->flags = KVM_PPC_PAGE_SIZES_REAL | KVM_PPC_1T_SEGMENTS; |
| 3550 | info->slb_size = 32; |
Benjamin Herrenschmidt | 5b74716 | 2012-04-26 19:43:42 +0000 | [diff] [blame] | 3551 | |
| 3552 | /* We only support these sizes for now, and no muti-size segments */ |
| 3553 | sps = &info->sps[0]; |
Paul Mackerras | 8dc6cca | 2017-09-11 15:29:45 +1000 | [diff] [blame] | 3554 | kvmppc_add_seg_page_size(&sps, 12, 0); |
| 3555 | kvmppc_add_seg_page_size(&sps, 16, SLB_VSID_L | SLB_VSID_LP_01); |
| 3556 | kvmppc_add_seg_page_size(&sps, 24, SLB_VSID_L); |
Benjamin Herrenschmidt | 5b74716 | 2012-04-26 19:43:42 +0000 | [diff] [blame] | 3557 | |
| 3558 | return 0; |
| 3559 | } |
| 3560 | |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 3561 | /* |
| 3562 | * Get (and clear) the dirty memory log for a memory slot. |
| 3563 | */ |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 3564 | static int kvm_vm_ioctl_get_dirty_log_hv(struct kvm *kvm, |
| 3565 | struct kvm_dirty_log *log) |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 3566 | { |
Paolo Bonzini | 9f6b802 | 2015-05-17 16:20:07 +0200 | [diff] [blame] | 3567 | struct kvm_memslots *slots; |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 3568 | struct kvm_memory_slot *memslot; |
Paul Mackerras | 8f7b79b | 2017-01-30 21:21:48 +1100 | [diff] [blame] | 3569 | int i, r; |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 3570 | unsigned long n; |
Paul Mackerras | e641a31 | 2017-10-26 16:39:19 +1100 | [diff] [blame] | 3571 | unsigned long *buf, *p; |
Paul Mackerras | 8f7b79b | 2017-01-30 21:21:48 +1100 | [diff] [blame] | 3572 | struct kvm_vcpu *vcpu; |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 3573 | |
| 3574 | mutex_lock(&kvm->slots_lock); |
| 3575 | |
| 3576 | r = -EINVAL; |
Alex Williamson | bbacc0c | 2012-12-10 10:33:09 -0700 | [diff] [blame] | 3577 | if (log->slot >= KVM_USER_MEM_SLOTS) |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 3578 | goto out; |
| 3579 | |
Paolo Bonzini | 9f6b802 | 2015-05-17 16:20:07 +0200 | [diff] [blame] | 3580 | slots = kvm_memslots(kvm); |
| 3581 | memslot = id_to_memslot(slots, log->slot); |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 3582 | r = -ENOENT; |
| 3583 | if (!memslot->dirty_bitmap) |
| 3584 | goto out; |
| 3585 | |
Paul Mackerras | 8f7b79b | 2017-01-30 21:21:48 +1100 | [diff] [blame] | 3586 | /* |
Paul Mackerras | e641a31 | 2017-10-26 16:39:19 +1100 | [diff] [blame] | 3587 | * Use second half of bitmap area because both HPT and radix |
| 3588 | * accumulate bits in the first half. |
Paul Mackerras | 8f7b79b | 2017-01-30 21:21:48 +1100 | [diff] [blame] | 3589 | */ |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 3590 | n = kvm_dirty_bitmap_bytes(memslot); |
Paul Mackerras | 8f7b79b | 2017-01-30 21:21:48 +1100 | [diff] [blame] | 3591 | buf = memslot->dirty_bitmap + n / sizeof(long); |
| 3592 | memset(buf, 0, n); |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 3593 | |
Paul Mackerras | 8f7b79b | 2017-01-30 21:21:48 +1100 | [diff] [blame] | 3594 | if (kvm_is_radix(kvm)) |
| 3595 | r = kvmppc_hv_get_dirty_log_radix(kvm, memslot, buf); |
| 3596 | else |
| 3597 | r = kvmppc_hv_get_dirty_log_hpt(kvm, memslot, buf); |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 3598 | if (r) |
| 3599 | goto out; |
| 3600 | |
Paul Mackerras | e641a31 | 2017-10-26 16:39:19 +1100 | [diff] [blame] | 3601 | /* |
| 3602 | * We accumulate dirty bits in the first half of the |
| 3603 | * memslot's dirty_bitmap area, for when pages are paged |
| 3604 | * out or modified by the host directly. Pick up these |
| 3605 | * bits and add them to the map. |
| 3606 | */ |
| 3607 | p = memslot->dirty_bitmap; |
| 3608 | for (i = 0; i < n / sizeof(long); ++i) |
| 3609 | buf[i] |= xchg(&p[i], 0); |
| 3610 | |
Paul Mackerras | 8f7b79b | 2017-01-30 21:21:48 +1100 | [diff] [blame] | 3611 | /* Harvest dirty bits from VPA and DTL updates */ |
| 3612 | /* Note: we never modify the SLB shadow buffer areas */ |
| 3613 | kvm_for_each_vcpu(i, vcpu, kvm) { |
| 3614 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 3615 | kvmppc_harvest_vpa_dirty(&vcpu->arch.vpa, memslot, buf); |
| 3616 | kvmppc_harvest_vpa_dirty(&vcpu->arch.dtl, memslot, buf); |
| 3617 | spin_unlock(&vcpu->arch.vpa_update_lock); |
| 3618 | } |
| 3619 | |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 3620 | r = -EFAULT; |
Paul Mackerras | 8f7b79b | 2017-01-30 21:21:48 +1100 | [diff] [blame] | 3621 | if (copy_to_user(log->dirty_bitmap, buf, n)) |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 3622 | goto out; |
| 3623 | |
| 3624 | r = 0; |
| 3625 | out: |
| 3626 | mutex_unlock(&kvm->slots_lock); |
| 3627 | return r; |
| 3628 | } |
| 3629 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 3630 | static void kvmppc_core_free_memslot_hv(struct kvm_memory_slot *free, |
| 3631 | struct kvm_memory_slot *dont) |
Paul Mackerras | a66b48c | 2012-09-11 13:27:46 +0000 | [diff] [blame] | 3632 | { |
| 3633 | if (!dont || free->arch.rmap != dont->arch.rmap) { |
| 3634 | vfree(free->arch.rmap); |
| 3635 | free->arch.rmap = NULL; |
| 3636 | } |
Paul Mackerras | a66b48c | 2012-09-11 13:27:46 +0000 | [diff] [blame] | 3637 | } |
| 3638 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 3639 | static int kvmppc_core_create_memslot_hv(struct kvm_memory_slot *slot, |
| 3640 | unsigned long npages) |
Paul Mackerras | a66b48c | 2012-09-11 13:27:46 +0000 | [diff] [blame] | 3641 | { |
Kees Cook | fad953c | 2018-06-12 14:27:37 -0700 | [diff] [blame] | 3642 | slot->arch.rmap = vzalloc(array_size(npages, sizeof(*slot->arch.rmap))); |
Paul Mackerras | a66b48c | 2012-09-11 13:27:46 +0000 | [diff] [blame] | 3643 | if (!slot->arch.rmap) |
| 3644 | return -ENOMEM; |
Paul Mackerras | a66b48c | 2012-09-11 13:27:46 +0000 | [diff] [blame] | 3645 | |
| 3646 | return 0; |
| 3647 | } |
| 3648 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 3649 | static int kvmppc_core_prepare_memory_region_hv(struct kvm *kvm, |
| 3650 | struct kvm_memory_slot *memslot, |
Paolo Bonzini | 09170a4 | 2015-05-18 13:59:39 +0200 | [diff] [blame] | 3651 | const struct kvm_userspace_memory_region *mem) |
Paul Mackerras | a66b48c | 2012-09-11 13:27:46 +0000 | [diff] [blame] | 3652 | { |
Paul Mackerras | a66b48c | 2012-09-11 13:27:46 +0000 | [diff] [blame] | 3653 | return 0; |
| 3654 | } |
| 3655 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 3656 | static void kvmppc_core_commit_memory_region_hv(struct kvm *kvm, |
Paolo Bonzini | 09170a4 | 2015-05-18 13:59:39 +0200 | [diff] [blame] | 3657 | const struct kvm_userspace_memory_region *mem, |
Paolo Bonzini | f36f3f2 | 2015-05-18 13:20:23 +0200 | [diff] [blame] | 3658 | const struct kvm_memory_slot *old, |
| 3659 | const struct kvm_memory_slot *new) |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 3660 | { |
Paul Mackerras | dfe49db | 2012-09-11 13:28:18 +0000 | [diff] [blame] | 3661 | unsigned long npages = mem->memory_size >> PAGE_SHIFT; |
Paul Mackerras | dfe49db | 2012-09-11 13:28:18 +0000 | [diff] [blame] | 3662 | |
Yongji Xie | a56ee9f | 2016-11-04 13:55:12 +0800 | [diff] [blame] | 3663 | /* |
| 3664 | * If we are making a new memslot, it might make |
| 3665 | * some address that was previously cached as emulated |
| 3666 | * MMIO be no longer emulated MMIO, so invalidate |
| 3667 | * all the caches of emulated MMIO translations. |
| 3668 | */ |
| 3669 | if (npages) |
| 3670 | atomic64_inc(&kvm->arch.mmio_update); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 3671 | } |
| 3672 | |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 3673 | /* |
| 3674 | * Update LPCR values in kvm->arch and in vcores. |
| 3675 | * Caller must hold kvm->lock. |
| 3676 | */ |
| 3677 | void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr, unsigned long mask) |
| 3678 | { |
| 3679 | long int i; |
| 3680 | u32 cores_done = 0; |
| 3681 | |
| 3682 | if ((kvm->arch.lpcr & mask) == lpcr) |
| 3683 | return; |
| 3684 | |
| 3685 | kvm->arch.lpcr = (kvm->arch.lpcr & ~mask) | lpcr; |
| 3686 | |
| 3687 | for (i = 0; i < KVM_MAX_VCORES; ++i) { |
| 3688 | struct kvmppc_vcore *vc = kvm->arch.vcores[i]; |
| 3689 | if (!vc) |
| 3690 | continue; |
| 3691 | spin_lock(&vc->lock); |
| 3692 | vc->lpcr = (vc->lpcr & ~mask) | lpcr; |
| 3693 | spin_unlock(&vc->lock); |
| 3694 | if (++cores_done >= kvm->arch.online_vcores) |
| 3695 | break; |
| 3696 | } |
| 3697 | } |
| 3698 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 3699 | static void kvmppc_mmu_destroy_hv(struct kvm_vcpu *vcpu) |
| 3700 | { |
| 3701 | return; |
| 3702 | } |
| 3703 | |
Paul Mackerras | ded13fc | 2017-11-22 14:38:53 +1100 | [diff] [blame] | 3704 | void kvmppc_setup_partition_table(struct kvm *kvm) |
Paul Mackerras | 7a84084 | 2016-11-16 22:25:20 +1100 | [diff] [blame] | 3705 | { |
| 3706 | unsigned long dw0, dw1; |
| 3707 | |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 3708 | if (!kvm_is_radix(kvm)) { |
| 3709 | /* PS field - page size for VRMA */ |
| 3710 | dw0 = ((kvm->arch.vrma_slb_v & SLB_VSID_L) >> 1) | |
| 3711 | ((kvm->arch.vrma_slb_v & SLB_VSID_LP) << 1); |
| 3712 | /* HTABSIZE and HTABORG fields */ |
| 3713 | dw0 |= kvm->arch.sdr1; |
Paul Mackerras | 7a84084 | 2016-11-16 22:25:20 +1100 | [diff] [blame] | 3714 | |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 3715 | /* Second dword as set by userspace */ |
| 3716 | dw1 = kvm->arch.process_table; |
| 3717 | } else { |
| 3718 | dw0 = PATB_HR | radix__get_tree_size() | |
| 3719 | __pa(kvm->arch.pgtable) | RADIX_PGD_INDEX_SIZE; |
| 3720 | dw1 = PATB_GR | kvm->arch.process_table; |
| 3721 | } |
Paul Mackerras | 7a84084 | 2016-11-16 22:25:20 +1100 | [diff] [blame] | 3722 | |
| 3723 | mmu_partition_table_set_entry(kvm->arch.lpid, dw0, dw1); |
| 3724 | } |
| 3725 | |
Paul Mackerras | 1b151ce | 2017-09-13 15:53:48 +1000 | [diff] [blame] | 3726 | /* |
| 3727 | * Set up HPT (hashed page table) and RMA (real-mode area). |
| 3728 | * Must be called with kvm->lock held. |
| 3729 | */ |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 3730 | static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu) |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 3731 | { |
| 3732 | int err = 0; |
| 3733 | struct kvm *kvm = vcpu->kvm; |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 3734 | unsigned long hva; |
| 3735 | struct kvm_memory_slot *memslot; |
| 3736 | struct vm_area_struct *vma; |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 3737 | unsigned long lpcr = 0, senc; |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 3738 | unsigned long psize, porder; |
Paul Mackerras | 2c9097e | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 3739 | int srcu_idx; |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 3740 | |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 3741 | /* Allocate hashed page table (if not done already) and reset it */ |
David Gibson | 3f9d4f5 | 2016-12-20 16:49:00 +1100 | [diff] [blame] | 3742 | if (!kvm->arch.hpt.virt) { |
David Gibson | aae0777 | 2016-12-20 16:49:02 +1100 | [diff] [blame] | 3743 | int order = KVM_DEFAULT_HPT_ORDER; |
| 3744 | struct kvm_hpt_info info; |
| 3745 | |
| 3746 | err = kvmppc_allocate_hpt(&info, order); |
| 3747 | /* If we get here, it means userspace didn't specify a |
| 3748 | * size explicitly. So, try successively smaller |
| 3749 | * sizes if the default failed. */ |
| 3750 | while ((err == -ENOMEM) && --order >= PPC_MIN_HPT_ORDER) |
| 3751 | err = kvmppc_allocate_hpt(&info, order); |
| 3752 | |
| 3753 | if (err < 0) { |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 3754 | pr_err("KVM: Couldn't alloc HPT\n"); |
| 3755 | goto out; |
| 3756 | } |
David Gibson | aae0777 | 2016-12-20 16:49:02 +1100 | [diff] [blame] | 3757 | |
| 3758 | kvmppc_set_hpt(kvm, &info); |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 3759 | } |
| 3760 | |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 3761 | /* Look up the memslot for guest physical address 0 */ |
Paul Mackerras | 2c9097e | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 3762 | srcu_idx = srcu_read_lock(&kvm->srcu); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 3763 | memslot = gfn_to_memslot(kvm, 0); |
| 3764 | |
| 3765 | /* We must have some memory at 0 by now */ |
| 3766 | err = -EINVAL; |
| 3767 | if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) |
Paul Mackerras | 2c9097e | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 3768 | goto out_srcu; |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 3769 | |
| 3770 | /* Look up the VMA for the start of this memory slot */ |
| 3771 | hva = memslot->userspace_addr; |
| 3772 | down_read(¤t->mm->mmap_sem); |
| 3773 | vma = find_vma(current->mm, hva); |
| 3774 | if (!vma || vma->vm_start > hva || (vma->vm_flags & VM_IO)) |
| 3775 | goto up_out; |
| 3776 | |
| 3777 | psize = vma_kernel_pagesize(vma); |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 3778 | |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 3779 | up_read(¤t->mm->mmap_sem); |
| 3780 | |
Paul Mackerras | c17b98c | 2014-12-03 13:30:38 +1100 | [diff] [blame] | 3781 | /* We can handle 4k, 64k or 16M pages in the VRMA */ |
Paul Mackerras | debd574 | 2018-03-02 15:38:04 +1100 | [diff] [blame] | 3782 | if (psize >= 0x1000000) |
| 3783 | psize = 0x1000000; |
| 3784 | else if (psize >= 0x10000) |
| 3785 | psize = 0x10000; |
| 3786 | else |
| 3787 | psize = 0x1000; |
| 3788 | porder = __ilog2(psize); |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 3789 | |
Paul Mackerras | c17b98c | 2014-12-03 13:30:38 +1100 | [diff] [blame] | 3790 | senc = slb_pgsize_encoding(psize); |
| 3791 | kvm->arch.vrma_slb_v = senc | SLB_VSID_B_1T | |
| 3792 | (VRMA_VSID << SLB_VSID_SHIFT_1T); |
Paul Mackerras | c17b98c | 2014-12-03 13:30:38 +1100 | [diff] [blame] | 3793 | /* Create HPTEs in the hash page table for the VRMA */ |
| 3794 | kvmppc_map_vrma(vcpu, memslot, porder); |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 3795 | |
Paul Mackerras | 7a84084 | 2016-11-16 22:25:20 +1100 | [diff] [blame] | 3796 | /* Update VRMASD field in the LPCR */ |
| 3797 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) { |
| 3798 | /* the -4 is to account for senc values starting at 0x10 */ |
| 3799 | lpcr = senc << (LPCR_VRMASD_SH - 4); |
| 3800 | kvmppc_update_lpcr(kvm, lpcr, LPCR_VRMASD); |
Paul Mackerras | 7a84084 | 2016-11-16 22:25:20 +1100 | [diff] [blame] | 3801 | } |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 3802 | |
Paul Mackerras | 1b151ce | 2017-09-13 15:53:48 +1000 | [diff] [blame] | 3803 | /* Order updates to kvm->arch.lpcr etc. vs. mmu_ready */ |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 3804 | smp_wmb(); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 3805 | err = 0; |
Paul Mackerras | 2c9097e | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 3806 | out_srcu: |
| 3807 | srcu_read_unlock(&kvm->srcu, srcu_idx); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 3808 | out: |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 3809 | return err; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 3810 | |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 3811 | up_out: |
| 3812 | up_read(¤t->mm->mmap_sem); |
Lai Jiangshan | 505d642 | 2013-03-16 00:50:49 +0800 | [diff] [blame] | 3813 | goto out_srcu; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 3814 | } |
| 3815 | |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 3816 | /* Must be called with kvm->lock held and mmu_ready = 0 and no vcpus running */ |
| 3817 | int kvmppc_switch_mmu_to_hpt(struct kvm *kvm) |
| 3818 | { |
| 3819 | kvmppc_free_radix(kvm); |
| 3820 | kvmppc_update_lpcr(kvm, LPCR_VPM1, |
| 3821 | LPCR_VPM1 | LPCR_UPRT | LPCR_GTSE | LPCR_HR); |
| 3822 | kvmppc_rmap_reset(kvm); |
| 3823 | kvm->arch.radix = 0; |
| 3824 | kvm->arch.process_table = 0; |
| 3825 | return 0; |
| 3826 | } |
| 3827 | |
| 3828 | /* Must be called with kvm->lock held and mmu_ready = 0 and no vcpus running */ |
| 3829 | int kvmppc_switch_mmu_to_radix(struct kvm *kvm) |
| 3830 | { |
| 3831 | int err; |
| 3832 | |
| 3833 | err = kvmppc_init_vm_radix(kvm); |
| 3834 | if (err) |
| 3835 | return err; |
| 3836 | |
| 3837 | kvmppc_free_hpt(&kvm->arch.hpt); |
| 3838 | kvmppc_update_lpcr(kvm, LPCR_UPRT | LPCR_GTSE | LPCR_HR, |
| 3839 | LPCR_VPM1 | LPCR_UPRT | LPCR_GTSE | LPCR_HR); |
| 3840 | kvm->arch.radix = 1; |
| 3841 | return 0; |
| 3842 | } |
| 3843 | |
Suresh Warrier | 79b6c24 | 2015-12-17 14:59:06 -0600 | [diff] [blame] | 3844 | #ifdef CONFIG_KVM_XICS |
| 3845 | /* |
| 3846 | * Allocate a per-core structure for managing state about which cores are |
| 3847 | * running in the host versus the guest and for exchanging data between |
| 3848 | * real mode KVM and CPU running in the host. |
| 3849 | * This is only done for the first VM. |
| 3850 | * The allocated structure stays even if all VMs have stopped. |
| 3851 | * It is only freed when the kvm-hv module is unloaded. |
| 3852 | * It's OK for this routine to fail, we just don't support host |
| 3853 | * core operations like redirecting H_IPI wakeups. |
| 3854 | */ |
| 3855 | void kvmppc_alloc_host_rm_ops(void) |
| 3856 | { |
| 3857 | struct kvmppc_host_rm_ops *ops; |
| 3858 | unsigned long l_ops; |
| 3859 | int cpu, core; |
| 3860 | int size; |
| 3861 | |
| 3862 | /* Not the first time here ? */ |
| 3863 | if (kvmppc_host_rm_ops_hv != NULL) |
| 3864 | return; |
| 3865 | |
| 3866 | ops = kzalloc(sizeof(struct kvmppc_host_rm_ops), GFP_KERNEL); |
| 3867 | if (!ops) |
| 3868 | return; |
| 3869 | |
| 3870 | size = cpu_nr_cores() * sizeof(struct kvmppc_host_rm_core); |
| 3871 | ops->rm_core = kzalloc(size, GFP_KERNEL); |
| 3872 | |
| 3873 | if (!ops->rm_core) { |
| 3874 | kfree(ops); |
| 3875 | return; |
| 3876 | } |
| 3877 | |
Sebastian Andrzej Siewior | 419af25f | 2017-05-24 10:15:21 +0200 | [diff] [blame] | 3878 | cpus_read_lock(); |
Suresh Warrier | 6f3bb80 | 2015-12-17 14:59:08 -0600 | [diff] [blame] | 3879 | |
Suresh Warrier | 79b6c24 | 2015-12-17 14:59:06 -0600 | [diff] [blame] | 3880 | for (cpu = 0; cpu < nr_cpu_ids; cpu += threads_per_core) { |
| 3881 | if (!cpu_online(cpu)) |
| 3882 | continue; |
| 3883 | |
| 3884 | core = cpu >> threads_shift; |
| 3885 | ops->rm_core[core].rm_state.in_host = 1; |
| 3886 | } |
| 3887 | |
Suresh Warrier | 0c2a660 | 2015-12-17 14:59:09 -0600 | [diff] [blame] | 3888 | ops->vcpu_kick = kvmppc_fast_vcpu_kick_hv; |
| 3889 | |
Suresh Warrier | 79b6c24 | 2015-12-17 14:59:06 -0600 | [diff] [blame] | 3890 | /* |
| 3891 | * Make the contents of the kvmppc_host_rm_ops structure visible |
| 3892 | * to other CPUs before we assign it to the global variable. |
| 3893 | * Do an atomic assignment (no locks used here), but if someone |
| 3894 | * beats us to it, just free our copy and return. |
| 3895 | */ |
| 3896 | smp_wmb(); |
| 3897 | l_ops = (unsigned long) ops; |
| 3898 | |
| 3899 | if (cmpxchg64((unsigned long *)&kvmppc_host_rm_ops_hv, 0, l_ops)) { |
Sebastian Andrzej Siewior | 419af25f | 2017-05-24 10:15:21 +0200 | [diff] [blame] | 3900 | cpus_read_unlock(); |
Suresh Warrier | 79b6c24 | 2015-12-17 14:59:06 -0600 | [diff] [blame] | 3901 | kfree(ops->rm_core); |
| 3902 | kfree(ops); |
Suresh Warrier | 6f3bb80 | 2015-12-17 14:59:08 -0600 | [diff] [blame] | 3903 | return; |
Suresh Warrier | 79b6c24 | 2015-12-17 14:59:06 -0600 | [diff] [blame] | 3904 | } |
Suresh Warrier | 6f3bb80 | 2015-12-17 14:59:08 -0600 | [diff] [blame] | 3905 | |
Sebastian Andrzej Siewior | 419af25f | 2017-05-24 10:15:21 +0200 | [diff] [blame] | 3906 | cpuhp_setup_state_nocalls_cpuslocked(CPUHP_KVM_PPC_BOOK3S_PREPARE, |
| 3907 | "ppc/kvm_book3s:prepare", |
| 3908 | kvmppc_set_host_core, |
| 3909 | kvmppc_clear_host_core); |
| 3910 | cpus_read_unlock(); |
Suresh Warrier | 79b6c24 | 2015-12-17 14:59:06 -0600 | [diff] [blame] | 3911 | } |
| 3912 | |
| 3913 | void kvmppc_free_host_rm_ops(void) |
| 3914 | { |
| 3915 | if (kvmppc_host_rm_ops_hv) { |
Anna-Maria Gleixner | 3f7cd91 | 2016-11-27 00:13:45 +0100 | [diff] [blame] | 3916 | cpuhp_remove_state_nocalls(CPUHP_KVM_PPC_BOOK3S_PREPARE); |
Suresh Warrier | 79b6c24 | 2015-12-17 14:59:06 -0600 | [diff] [blame] | 3917 | kfree(kvmppc_host_rm_ops_hv->rm_core); |
| 3918 | kfree(kvmppc_host_rm_ops_hv); |
| 3919 | kvmppc_host_rm_ops_hv = NULL; |
| 3920 | } |
| 3921 | } |
| 3922 | #endif |
| 3923 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 3924 | static int kvmppc_core_init_vm_hv(struct kvm *kvm) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 3925 | { |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 3926 | unsigned long lpcr, lpid; |
Paul Mackerras | e23a808 | 2015-03-28 14:21:01 +1100 | [diff] [blame] | 3927 | char buf[32]; |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 3928 | int ret; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 3929 | |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 3930 | /* Allocate the guest's logical partition ID */ |
| 3931 | |
| 3932 | lpid = kvmppc_alloc_lpid(); |
Chen Gang | 5d226ae | 2013-07-22 14:32:35 +0800 | [diff] [blame] | 3933 | if ((long)lpid < 0) |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 3934 | return -ENOMEM; |
| 3935 | kvm->arch.lpid = lpid; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 3936 | |
Suresh Warrier | 79b6c24 | 2015-12-17 14:59:06 -0600 | [diff] [blame] | 3937 | kvmppc_alloc_host_rm_ops(); |
| 3938 | |
Paul Mackerras | 1b400ba | 2012-11-21 23:28:08 +0000 | [diff] [blame] | 3939 | /* |
| 3940 | * Since we don't flush the TLB when tearing down a VM, |
| 3941 | * and this lpid might have previously been used, |
| 3942 | * make sure we flush on each core before running the new VM. |
Paul Mackerras | 7c5b06c | 2016-11-18 08:28:51 +1100 | [diff] [blame] | 3943 | * On POWER9, the tlbie in mmu_partition_table_set_entry() |
| 3944 | * does this flush for us. |
Paul Mackerras | 1b400ba | 2012-11-21 23:28:08 +0000 | [diff] [blame] | 3945 | */ |
Paul Mackerras | 7c5b06c | 2016-11-18 08:28:51 +1100 | [diff] [blame] | 3946 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
| 3947 | cpumask_setall(&kvm->arch.need_tlb_flush); |
Paul Mackerras | 1b400ba | 2012-11-21 23:28:08 +0000 | [diff] [blame] | 3948 | |
Paul Mackerras | 699a0ea | 2014-06-02 11:02:59 +1000 | [diff] [blame] | 3949 | /* Start out with the default set of hcalls enabled */ |
| 3950 | memcpy(kvm->arch.enabled_hcalls, default_enabled_hcalls, |
| 3951 | sizeof(kvm->arch.enabled_hcalls)); |
| 3952 | |
Paul Mackerras | 7a84084 | 2016-11-16 22:25:20 +1100 | [diff] [blame] | 3953 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
| 3954 | kvm->arch.host_sdr1 = mfspr(SPRN_SDR1); |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 3955 | |
Paul Mackerras | c17b98c | 2014-12-03 13:30:38 +1100 | [diff] [blame] | 3956 | /* Init LPCR for virtual RMA mode */ |
| 3957 | kvm->arch.host_lpid = mfspr(SPRN_LPID); |
| 3958 | kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR); |
| 3959 | lpcr &= LPCR_PECE | LPCR_LPES; |
| 3960 | lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE | |
| 3961 | LPCR_VPM0 | LPCR_VPM1; |
| 3962 | kvm->arch.vrma_slb_v = SLB_VSID_B_1T | |
| 3963 | (VRMA_VSID << SLB_VSID_SHIFT_1T); |
| 3964 | /* On POWER8 turn on online bit to enable PURR/SPURR */ |
| 3965 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) |
| 3966 | lpcr |= LPCR_ONL; |
Paul Mackerras | 84f7139 | 2016-11-22 14:30:14 +1100 | [diff] [blame] | 3967 | /* |
| 3968 | * On POWER9, VPM0 bit is reserved (VPM0=1 behaviour is assumed) |
| 3969 | * Set HVICE bit to enable hypervisor virtualization interrupts. |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 3970 | * Set HEIC to prevent OS interrupts to go to hypervisor (should |
| 3971 | * be unnecessary but better safe than sorry in case we re-enable |
| 3972 | * EE in HV mode with this LPCR still set) |
Paul Mackerras | 84f7139 | 2016-11-22 14:30:14 +1100 | [diff] [blame] | 3973 | */ |
| 3974 | if (cpu_has_feature(CPU_FTR_ARCH_300)) { |
Paul Mackerras | 7a84084 | 2016-11-16 22:25:20 +1100 | [diff] [blame] | 3975 | lpcr &= ~LPCR_VPM0; |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 3976 | lpcr |= LPCR_HVICE | LPCR_HEIC; |
| 3977 | |
| 3978 | /* |
| 3979 | * If xive is enabled, we route 0x500 interrupts directly |
| 3980 | * to the guest. |
| 3981 | */ |
| 3982 | if (xive_enabled()) |
| 3983 | lpcr |= LPCR_LPES; |
Paul Mackerras | 84f7139 | 2016-11-22 14:30:14 +1100 | [diff] [blame] | 3984 | } |
| 3985 | |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 3986 | /* |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 3987 | * If the host uses radix, the guest starts out as radix. |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 3988 | */ |
| 3989 | if (radix_enabled()) { |
| 3990 | kvm->arch.radix = 1; |
Paul Mackerras | 1b151ce | 2017-09-13 15:53:48 +1000 | [diff] [blame] | 3991 | kvm->arch.mmu_ready = 1; |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 3992 | lpcr &= ~LPCR_VPM1; |
| 3993 | lpcr |= LPCR_UPRT | LPCR_GTSE | LPCR_HR; |
| 3994 | ret = kvmppc_init_vm_radix(kvm); |
| 3995 | if (ret) { |
| 3996 | kvmppc_free_lpid(kvm->arch.lpid); |
| 3997 | return ret; |
| 3998 | } |
| 3999 | kvmppc_setup_partition_table(kvm); |
| 4000 | } |
| 4001 | |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 4002 | kvm->arch.lpcr = lpcr; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 4003 | |
David Gibson | 5e98596 | 2016-12-20 16:49:05 +1100 | [diff] [blame] | 4004 | /* Initialization for future HPT resizes */ |
| 4005 | kvm->arch.resize_hpt = NULL; |
| 4006 | |
Paul Mackerras | 512691d | 2012-10-15 01:15:41 +0000 | [diff] [blame] | 4007 | /* |
Paul Mackerras | 7c5b06c | 2016-11-18 08:28:51 +1100 | [diff] [blame] | 4008 | * Work out how many sets the TLB has, for the use of |
| 4009 | * the TLB invalidation loop in book3s_hv_rmhandlers.S. |
| 4010 | */ |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 4011 | if (radix_enabled()) |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 4012 | kvm->arch.tlb_sets = POWER9_TLB_SETS_RADIX; /* 128 */ |
| 4013 | else if (cpu_has_feature(CPU_FTR_ARCH_300)) |
Paul Mackerras | 7c5b06c | 2016-11-18 08:28:51 +1100 | [diff] [blame] | 4014 | kvm->arch.tlb_sets = POWER9_TLB_SETS_HASH; /* 256 */ |
| 4015 | else if (cpu_has_feature(CPU_FTR_ARCH_207S)) |
| 4016 | kvm->arch.tlb_sets = POWER8_TLB_SETS; /* 512 */ |
| 4017 | else |
| 4018 | kvm->arch.tlb_sets = POWER7_TLB_SETS; /* 128 */ |
| 4019 | |
| 4020 | /* |
Michael Ellerman | 441c19c | 2014-05-23 18:15:25 +1000 | [diff] [blame] | 4021 | * Track that we now have a HV mode VM active. This blocks secondary |
| 4022 | * CPU threads from coming online. |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 4023 | * On POWER9, we only need to do this if the "indep_threads_mode" |
| 4024 | * module parameter has been set to N. |
Paul Mackerras | 512691d | 2012-10-15 01:15:41 +0000 | [diff] [blame] | 4025 | */ |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 4026 | if (cpu_has_feature(CPU_FTR_ARCH_300)) |
| 4027 | kvm->arch.threads_indep = indep_threads_mode; |
| 4028 | if (!kvm->arch.threads_indep) |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 4029 | kvm_hv_vm_activated(); |
Paul Mackerras | 512691d | 2012-10-15 01:15:41 +0000 | [diff] [blame] | 4030 | |
Paul Mackerras | e23a808 | 2015-03-28 14:21:01 +1100 | [diff] [blame] | 4031 | /* |
Paul Mackerras | 3c31352 | 2017-02-06 13:24:41 +1100 | [diff] [blame] | 4032 | * Initialize smt_mode depending on processor. |
| 4033 | * POWER8 and earlier have to use "strict" threading, where |
| 4034 | * all vCPUs in a vcore have to run on the same (sub)core, |
| 4035 | * whereas on POWER9 the threads can each run a different |
| 4036 | * guest. |
| 4037 | */ |
| 4038 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
| 4039 | kvm->arch.smt_mode = threads_per_subcore; |
| 4040 | else |
| 4041 | kvm->arch.smt_mode = 1; |
Paul Mackerras | 5790069 | 2017-05-16 16:41:20 +1000 | [diff] [blame] | 4042 | kvm->arch.emul_smt_mode = 1; |
Paul Mackerras | 3c31352 | 2017-02-06 13:24:41 +1100 | [diff] [blame] | 4043 | |
| 4044 | /* |
Paul Mackerras | e23a808 | 2015-03-28 14:21:01 +1100 | [diff] [blame] | 4045 | * Create a debugfs directory for the VM |
| 4046 | */ |
| 4047 | snprintf(buf, sizeof(buf), "vm%d", current->pid); |
| 4048 | kvm->arch.debugfs_dir = debugfs_create_dir(buf, kvm_debugfs_dir); |
Greg Kroah-Hartman | 929f45e | 2018-05-29 18:22:04 +0200 | [diff] [blame] | 4049 | kvmppc_mmu_debugfs_init(kvm); |
Paul Mackerras | e23a808 | 2015-03-28 14:21:01 +1100 | [diff] [blame] | 4050 | |
David Gibson | 54738c0 | 2011-06-29 00:22:41 +0000 | [diff] [blame] | 4051 | return 0; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 4052 | } |
| 4053 | |
Paul Mackerras | f1378b1 | 2013-09-27 15:33:43 +0530 | [diff] [blame] | 4054 | static void kvmppc_free_vcores(struct kvm *kvm) |
| 4055 | { |
| 4056 | long int i; |
| 4057 | |
Paul Mackerras | 2331631 | 2015-10-21 16:03:14 +1100 | [diff] [blame] | 4058 | for (i = 0; i < KVM_MAX_VCORES; ++i) |
Paul Mackerras | f1378b1 | 2013-09-27 15:33:43 +0530 | [diff] [blame] | 4059 | kfree(kvm->arch.vcores[i]); |
| 4060 | kvm->arch.online_vcores = 0; |
| 4061 | } |
| 4062 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 4063 | static void kvmppc_core_destroy_vm_hv(struct kvm *kvm) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 4064 | { |
Paul Mackerras | e23a808 | 2015-03-28 14:21:01 +1100 | [diff] [blame] | 4065 | debugfs_remove_recursive(kvm->arch.debugfs_dir); |
| 4066 | |
Paul Mackerras | 516f789 | 2017-10-16 16:11:57 +1100 | [diff] [blame] | 4067 | if (!kvm->arch.threads_indep) |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 4068 | kvm_hv_vm_deactivated(); |
Paul Mackerras | 512691d | 2012-10-15 01:15:41 +0000 | [diff] [blame] | 4069 | |
Paul Mackerras | f1378b1 | 2013-09-27 15:33:43 +0530 | [diff] [blame] | 4070 | kvmppc_free_vcores(kvm); |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 4071 | |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 4072 | kvmppc_free_lpid(kvm->arch.lpid); |
| 4073 | |
Paul Mackerras | 5a31935 | 2017-01-30 21:21:46 +1100 | [diff] [blame] | 4074 | if (kvm_is_radix(kvm)) |
| 4075 | kvmppc_free_radix(kvm); |
| 4076 | else |
David Gibson | aae0777 | 2016-12-20 16:49:02 +1100 | [diff] [blame] | 4077 | kvmppc_free_hpt(&kvm->arch.hpt); |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 4078 | |
| 4079 | kvmppc_free_pimap(kvm); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 4080 | } |
| 4081 | |
| 4082 | /* We don't need to emulate any privileged instructions or dcbz */ |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 4083 | static int kvmppc_core_emulate_op_hv(struct kvm_run *run, struct kvm_vcpu *vcpu, |
| 4084 | unsigned int inst, int *advance) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 4085 | { |
| 4086 | return EMULATE_FAIL; |
| 4087 | } |
| 4088 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 4089 | static int kvmppc_core_emulate_mtspr_hv(struct kvm_vcpu *vcpu, int sprn, |
| 4090 | ulong spr_val) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 4091 | { |
| 4092 | return EMULATE_FAIL; |
| 4093 | } |
| 4094 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 4095 | static int kvmppc_core_emulate_mfspr_hv(struct kvm_vcpu *vcpu, int sprn, |
| 4096 | ulong *spr_val) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 4097 | { |
| 4098 | return EMULATE_FAIL; |
| 4099 | } |
| 4100 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 4101 | static int kvmppc_core_check_processor_compat_hv(void) |
| 4102 | { |
Paul Mackerras | c17b98c | 2014-12-03 13:30:38 +1100 | [diff] [blame] | 4103 | if (!cpu_has_feature(CPU_FTR_HVMODE) || |
| 4104 | !cpu_has_feature(CPU_FTR_ARCH_206)) |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 4105 | return -EIO; |
Aneesh Kumar K.V | 50de596 | 2016-04-29 23:25:43 +1000 | [diff] [blame] | 4106 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 4107 | return 0; |
| 4108 | } |
| 4109 | |
Suresh Warrier | 8daaafc | 2016-08-19 15:35:48 +1000 | [diff] [blame] | 4110 | #ifdef CONFIG_KVM_XICS |
| 4111 | |
| 4112 | void kvmppc_free_pimap(struct kvm *kvm) |
| 4113 | { |
| 4114 | kfree(kvm->arch.pimap); |
| 4115 | } |
| 4116 | |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 4117 | static struct kvmppc_passthru_irqmap *kvmppc_alloc_pimap(void) |
Suresh Warrier | 8daaafc | 2016-08-19 15:35:48 +1000 | [diff] [blame] | 4118 | { |
| 4119 | return kzalloc(sizeof(struct kvmppc_passthru_irqmap), GFP_KERNEL); |
| 4120 | } |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 4121 | |
| 4122 | static int kvmppc_set_passthru_irq(struct kvm *kvm, int host_irq, int guest_gsi) |
| 4123 | { |
| 4124 | struct irq_desc *desc; |
| 4125 | struct kvmppc_irq_map *irq_map; |
| 4126 | struct kvmppc_passthru_irqmap *pimap; |
| 4127 | struct irq_chip *chip; |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 4128 | int i, rc = 0; |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 4129 | |
Suresh Warrier | 644abbb | 2016-08-19 15:35:54 +1000 | [diff] [blame] | 4130 | if (!kvm_irq_bypass) |
| 4131 | return 1; |
| 4132 | |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 4133 | desc = irq_to_desc(host_irq); |
| 4134 | if (!desc) |
| 4135 | return -EIO; |
| 4136 | |
| 4137 | mutex_lock(&kvm->lock); |
| 4138 | |
| 4139 | pimap = kvm->arch.pimap; |
| 4140 | if (pimap == NULL) { |
| 4141 | /* First call, allocate structure to hold IRQ map */ |
| 4142 | pimap = kvmppc_alloc_pimap(); |
| 4143 | if (pimap == NULL) { |
| 4144 | mutex_unlock(&kvm->lock); |
| 4145 | return -ENOMEM; |
| 4146 | } |
| 4147 | kvm->arch.pimap = pimap; |
| 4148 | } |
| 4149 | |
| 4150 | /* |
| 4151 | * For now, we only support interrupts for which the EOI operation |
| 4152 | * is an OPAL call followed by a write to XIRR, since that's |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 4153 | * what our real-mode EOI code does, or a XIVE interrupt |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 4154 | */ |
| 4155 | chip = irq_data_get_irq_chip(&desc->irq_data); |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 4156 | if (!chip || !(is_pnv_opal_msi(chip) || is_xive_irq(chip))) { |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 4157 | pr_warn("kvmppc_set_passthru_irq_hv: Could not assign IRQ map for (%d,%d)\n", |
| 4158 | host_irq, guest_gsi); |
| 4159 | mutex_unlock(&kvm->lock); |
| 4160 | return -ENOENT; |
| 4161 | } |
| 4162 | |
| 4163 | /* |
| 4164 | * See if we already have an entry for this guest IRQ number. |
| 4165 | * If it's mapped to a hardware IRQ number, that's an error, |
| 4166 | * otherwise re-use this entry. |
| 4167 | */ |
| 4168 | for (i = 0; i < pimap->n_mapped; i++) { |
| 4169 | if (guest_gsi == pimap->mapped[i].v_hwirq) { |
| 4170 | if (pimap->mapped[i].r_hwirq) { |
| 4171 | mutex_unlock(&kvm->lock); |
| 4172 | return -EINVAL; |
| 4173 | } |
| 4174 | break; |
| 4175 | } |
| 4176 | } |
| 4177 | |
| 4178 | if (i == KVMPPC_PIRQ_MAPPED) { |
| 4179 | mutex_unlock(&kvm->lock); |
| 4180 | return -EAGAIN; /* table is full */ |
| 4181 | } |
| 4182 | |
| 4183 | irq_map = &pimap->mapped[i]; |
| 4184 | |
| 4185 | irq_map->v_hwirq = guest_gsi; |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 4186 | irq_map->desc = desc; |
| 4187 | |
Suresh Warrier | e3c13e5 | 2016-08-19 15:35:51 +1000 | [diff] [blame] | 4188 | /* |
| 4189 | * Order the above two stores before the next to serialize with |
| 4190 | * the KVM real mode handler. |
| 4191 | */ |
| 4192 | smp_wmb(); |
| 4193 | irq_map->r_hwirq = desc->irq_data.hwirq; |
| 4194 | |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 4195 | if (i == pimap->n_mapped) |
| 4196 | pimap->n_mapped++; |
| 4197 | |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 4198 | if (xive_enabled()) |
| 4199 | rc = kvmppc_xive_set_mapped(kvm, guest_gsi, desc); |
| 4200 | else |
| 4201 | kvmppc_xics_set_mapped(kvm, guest_gsi, desc->irq_data.hwirq); |
| 4202 | if (rc) |
| 4203 | irq_map->r_hwirq = 0; |
Paul Mackerras | 5d37519 | 2016-08-19 15:35:56 +1000 | [diff] [blame] | 4204 | |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 4205 | mutex_unlock(&kvm->lock); |
| 4206 | |
| 4207 | return 0; |
| 4208 | } |
| 4209 | |
| 4210 | static int kvmppc_clr_passthru_irq(struct kvm *kvm, int host_irq, int guest_gsi) |
| 4211 | { |
| 4212 | struct irq_desc *desc; |
| 4213 | struct kvmppc_passthru_irqmap *pimap; |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 4214 | int i, rc = 0; |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 4215 | |
Suresh Warrier | 644abbb | 2016-08-19 15:35:54 +1000 | [diff] [blame] | 4216 | if (!kvm_irq_bypass) |
| 4217 | return 0; |
| 4218 | |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 4219 | desc = irq_to_desc(host_irq); |
| 4220 | if (!desc) |
| 4221 | return -EIO; |
| 4222 | |
| 4223 | mutex_lock(&kvm->lock); |
Markus Elfring | a1c52e1 | 2017-01-20 11:00:08 +0100 | [diff] [blame] | 4224 | if (!kvm->arch.pimap) |
| 4225 | goto unlock; |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 4226 | |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 4227 | pimap = kvm->arch.pimap; |
| 4228 | |
| 4229 | for (i = 0; i < pimap->n_mapped; i++) { |
| 4230 | if (guest_gsi == pimap->mapped[i].v_hwirq) |
| 4231 | break; |
| 4232 | } |
| 4233 | |
| 4234 | if (i == pimap->n_mapped) { |
| 4235 | mutex_unlock(&kvm->lock); |
| 4236 | return -ENODEV; |
| 4237 | } |
| 4238 | |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 4239 | if (xive_enabled()) |
| 4240 | rc = kvmppc_xive_clr_mapped(kvm, guest_gsi, pimap->mapped[i].desc); |
| 4241 | else |
| 4242 | kvmppc_xics_clr_mapped(kvm, guest_gsi, pimap->mapped[i].r_hwirq); |
Paul Mackerras | 5d37519 | 2016-08-19 15:35:56 +1000 | [diff] [blame] | 4243 | |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 4244 | /* invalidate the entry (what do do on error from the above ?) */ |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 4245 | pimap->mapped[i].r_hwirq = 0; |
| 4246 | |
| 4247 | /* |
| 4248 | * We don't free this structure even when the count goes to |
| 4249 | * zero. The structure is freed when we destroy the VM. |
| 4250 | */ |
Markus Elfring | a1c52e1 | 2017-01-20 11:00:08 +0100 | [diff] [blame] | 4251 | unlock: |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 4252 | mutex_unlock(&kvm->lock); |
Benjamin Herrenschmidt | 5af5099 | 2017-04-05 17:54:56 +1000 | [diff] [blame] | 4253 | return rc; |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 4254 | } |
| 4255 | |
| 4256 | static int kvmppc_irq_bypass_add_producer_hv(struct irq_bypass_consumer *cons, |
| 4257 | struct irq_bypass_producer *prod) |
| 4258 | { |
| 4259 | int ret = 0; |
| 4260 | struct kvm_kernel_irqfd *irqfd = |
| 4261 | container_of(cons, struct kvm_kernel_irqfd, consumer); |
| 4262 | |
| 4263 | irqfd->producer = prod; |
| 4264 | |
| 4265 | ret = kvmppc_set_passthru_irq(irqfd->kvm, prod->irq, irqfd->gsi); |
| 4266 | if (ret) |
| 4267 | pr_info("kvmppc_set_passthru_irq (irq %d, gsi %d) fails: %d\n", |
| 4268 | prod->irq, irqfd->gsi, ret); |
| 4269 | |
| 4270 | return ret; |
| 4271 | } |
| 4272 | |
| 4273 | static void kvmppc_irq_bypass_del_producer_hv(struct irq_bypass_consumer *cons, |
| 4274 | struct irq_bypass_producer *prod) |
| 4275 | { |
| 4276 | int ret; |
| 4277 | struct kvm_kernel_irqfd *irqfd = |
| 4278 | container_of(cons, struct kvm_kernel_irqfd, consumer); |
| 4279 | |
| 4280 | irqfd->producer = NULL; |
| 4281 | |
| 4282 | /* |
| 4283 | * When producer of consumer is unregistered, we change back to |
| 4284 | * default external interrupt handling mode - KVM real mode |
| 4285 | * will switch back to host. |
| 4286 | */ |
| 4287 | ret = kvmppc_clr_passthru_irq(irqfd->kvm, prod->irq, irqfd->gsi); |
| 4288 | if (ret) |
| 4289 | pr_warn("kvmppc_clr_passthru_irq (irq %d, gsi %d) fails: %d\n", |
| 4290 | prod->irq, irqfd->gsi, ret); |
| 4291 | } |
Suresh Warrier | 8daaafc | 2016-08-19 15:35:48 +1000 | [diff] [blame] | 4292 | #endif |
| 4293 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 4294 | static long kvm_arch_vm_ioctl_hv(struct file *filp, |
| 4295 | unsigned int ioctl, unsigned long arg) |
| 4296 | { |
| 4297 | struct kvm *kvm __maybe_unused = filp->private_data; |
| 4298 | void __user *argp = (void __user *)arg; |
| 4299 | long r; |
| 4300 | |
| 4301 | switch (ioctl) { |
| 4302 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 4303 | case KVM_PPC_ALLOCATE_HTAB: { |
| 4304 | u32 htab_order; |
| 4305 | |
| 4306 | r = -EFAULT; |
| 4307 | if (get_user(htab_order, (u32 __user *)argp)) |
| 4308 | break; |
David Gibson | f98a8bf | 2016-12-20 16:49:03 +1100 | [diff] [blame] | 4309 | r = kvmppc_alloc_reset_hpt(kvm, htab_order); |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 4310 | if (r) |
| 4311 | break; |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 4312 | r = 0; |
| 4313 | break; |
| 4314 | } |
| 4315 | |
| 4316 | case KVM_PPC_GET_HTAB_FD: { |
| 4317 | struct kvm_get_htab_fd ghf; |
| 4318 | |
| 4319 | r = -EFAULT; |
| 4320 | if (copy_from_user(&ghf, argp, sizeof(ghf))) |
| 4321 | break; |
| 4322 | r = kvm_vm_ioctl_get_htab_fd(kvm, &ghf); |
| 4323 | break; |
| 4324 | } |
| 4325 | |
David Gibson | 5e98596 | 2016-12-20 16:49:05 +1100 | [diff] [blame] | 4326 | case KVM_PPC_RESIZE_HPT_PREPARE: { |
| 4327 | struct kvm_ppc_resize_hpt rhpt; |
| 4328 | |
| 4329 | r = -EFAULT; |
| 4330 | if (copy_from_user(&rhpt, argp, sizeof(rhpt))) |
| 4331 | break; |
| 4332 | |
| 4333 | r = kvm_vm_ioctl_resize_hpt_prepare(kvm, &rhpt); |
| 4334 | break; |
| 4335 | } |
| 4336 | |
| 4337 | case KVM_PPC_RESIZE_HPT_COMMIT: { |
| 4338 | struct kvm_ppc_resize_hpt rhpt; |
| 4339 | |
| 4340 | r = -EFAULT; |
| 4341 | if (copy_from_user(&rhpt, argp, sizeof(rhpt))) |
| 4342 | break; |
| 4343 | |
| 4344 | r = kvm_vm_ioctl_resize_hpt_commit(kvm, &rhpt); |
| 4345 | break; |
| 4346 | } |
| 4347 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 4348 | default: |
| 4349 | r = -ENOTTY; |
| 4350 | } |
| 4351 | |
| 4352 | return r; |
| 4353 | } |
| 4354 | |
Paul Mackerras | 699a0ea | 2014-06-02 11:02:59 +1000 | [diff] [blame] | 4355 | /* |
| 4356 | * List of hcall numbers to enable by default. |
| 4357 | * For compatibility with old userspace, we enable by default |
| 4358 | * all hcalls that were implemented before the hcall-enabling |
| 4359 | * facility was added. Note this list should not include H_RTAS. |
| 4360 | */ |
| 4361 | static unsigned int default_hcall_list[] = { |
| 4362 | H_REMOVE, |
| 4363 | H_ENTER, |
| 4364 | H_READ, |
| 4365 | H_PROTECT, |
| 4366 | H_BULK_REMOVE, |
| 4367 | H_GET_TCE, |
| 4368 | H_PUT_TCE, |
| 4369 | H_SET_DABR, |
| 4370 | H_SET_XDABR, |
| 4371 | H_CEDE, |
| 4372 | H_PROD, |
| 4373 | H_CONFER, |
| 4374 | H_REGISTER_VPA, |
| 4375 | #ifdef CONFIG_KVM_XICS |
| 4376 | H_EOI, |
| 4377 | H_CPPR, |
| 4378 | H_IPI, |
| 4379 | H_IPOLL, |
| 4380 | H_XIRR, |
| 4381 | H_XIRR_X, |
| 4382 | #endif |
| 4383 | 0 |
| 4384 | }; |
| 4385 | |
| 4386 | static void init_default_hcalls(void) |
| 4387 | { |
| 4388 | int i; |
Paul Mackerras | ae2113a | 2014-06-02 11:03:00 +1000 | [diff] [blame] | 4389 | unsigned int hcall; |
Paul Mackerras | 699a0ea | 2014-06-02 11:02:59 +1000 | [diff] [blame] | 4390 | |
Paul Mackerras | ae2113a | 2014-06-02 11:03:00 +1000 | [diff] [blame] | 4391 | for (i = 0; default_hcall_list[i]; ++i) { |
| 4392 | hcall = default_hcall_list[i]; |
| 4393 | WARN_ON(!kvmppc_hcall_impl_hv(hcall)); |
| 4394 | __set_bit(hcall / 4, default_enabled_hcalls); |
| 4395 | } |
Paul Mackerras | 699a0ea | 2014-06-02 11:02:59 +1000 | [diff] [blame] | 4396 | } |
| 4397 | |
Paul Mackerras | c927013 | 2017-01-30 21:21:41 +1100 | [diff] [blame] | 4398 | static int kvmhv_configure_mmu(struct kvm *kvm, struct kvm_ppc_mmuv3_cfg *cfg) |
| 4399 | { |
Paul Mackerras | 468808b | 2017-01-30 21:21:42 +1100 | [diff] [blame] | 4400 | unsigned long lpcr; |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 4401 | int radix; |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 4402 | int err; |
Paul Mackerras | 468808b | 2017-01-30 21:21:42 +1100 | [diff] [blame] | 4403 | |
| 4404 | /* If not on a POWER9, reject it */ |
| 4405 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
| 4406 | return -ENODEV; |
| 4407 | |
| 4408 | /* If any unknown flags set, reject it */ |
| 4409 | if (cfg->flags & ~(KVM_PPC_MMUV3_RADIX | KVM_PPC_MMUV3_GTSE)) |
| 4410 | return -EINVAL; |
| 4411 | |
Paul Mackerras | 468808b | 2017-01-30 21:21:42 +1100 | [diff] [blame] | 4412 | /* GR (guest radix) bit in process_table field must match */ |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 4413 | radix = !!(cfg->flags & KVM_PPC_MMUV3_RADIX); |
Paul Mackerras | 8cf4ecc | 2017-01-30 21:21:53 +1100 | [diff] [blame] | 4414 | if (!!(cfg->process_table & PATB_GR) != radix) |
Paul Mackerras | 468808b | 2017-01-30 21:21:42 +1100 | [diff] [blame] | 4415 | return -EINVAL; |
| 4416 | |
| 4417 | /* Process table size field must be reasonable, i.e. <= 24 */ |
| 4418 | if ((cfg->process_table & PRTS_MASK) > 24) |
| 4419 | return -EINVAL; |
| 4420 | |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 4421 | /* We can change a guest to/from radix now, if the host is radix */ |
| 4422 | if (radix && !radix_enabled()) |
| 4423 | return -EINVAL; |
| 4424 | |
Paul Mackerras | cf5f6f3 | 2017-09-11 16:05:30 +1000 | [diff] [blame] | 4425 | mutex_lock(&kvm->lock); |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 4426 | if (radix != kvm_is_radix(kvm)) { |
| 4427 | if (kvm->arch.mmu_ready) { |
| 4428 | kvm->arch.mmu_ready = 0; |
| 4429 | /* order mmu_ready vs. vcpus_running */ |
| 4430 | smp_mb(); |
| 4431 | if (atomic_read(&kvm->arch.vcpus_running)) { |
| 4432 | kvm->arch.mmu_ready = 1; |
| 4433 | err = -EBUSY; |
| 4434 | goto out_unlock; |
| 4435 | } |
| 4436 | } |
| 4437 | if (radix) |
| 4438 | err = kvmppc_switch_mmu_to_radix(kvm); |
| 4439 | else |
| 4440 | err = kvmppc_switch_mmu_to_hpt(kvm); |
| 4441 | if (err) |
| 4442 | goto out_unlock; |
| 4443 | } |
| 4444 | |
Paul Mackerras | 468808b | 2017-01-30 21:21:42 +1100 | [diff] [blame] | 4445 | kvm->arch.process_table = cfg->process_table; |
| 4446 | kvmppc_setup_partition_table(kvm); |
| 4447 | |
| 4448 | lpcr = (cfg->flags & KVM_PPC_MMUV3_GTSE) ? LPCR_GTSE : 0; |
| 4449 | kvmppc_update_lpcr(kvm, lpcr, LPCR_GTSE); |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 4450 | err = 0; |
Paul Mackerras | 468808b | 2017-01-30 21:21:42 +1100 | [diff] [blame] | 4451 | |
Paul Mackerras | 18c3640 | 2017-09-13 16:00:10 +1000 | [diff] [blame] | 4452 | out_unlock: |
| 4453 | mutex_unlock(&kvm->lock); |
| 4454 | return err; |
Paul Mackerras | c927013 | 2017-01-30 21:21:41 +1100 | [diff] [blame] | 4455 | } |
| 4456 | |
Aneesh Kumar K.V | cbbc58d | 2013-10-07 22:18:01 +0530 | [diff] [blame] | 4457 | static struct kvmppc_ops kvm_ops_hv = { |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 4458 | .get_sregs = kvm_arch_vcpu_ioctl_get_sregs_hv, |
| 4459 | .set_sregs = kvm_arch_vcpu_ioctl_set_sregs_hv, |
| 4460 | .get_one_reg = kvmppc_get_one_reg_hv, |
| 4461 | .set_one_reg = kvmppc_set_one_reg_hv, |
| 4462 | .vcpu_load = kvmppc_core_vcpu_load_hv, |
| 4463 | .vcpu_put = kvmppc_core_vcpu_put_hv, |
| 4464 | .set_msr = kvmppc_set_msr_hv, |
| 4465 | .vcpu_run = kvmppc_vcpu_run_hv, |
| 4466 | .vcpu_create = kvmppc_core_vcpu_create_hv, |
| 4467 | .vcpu_free = kvmppc_core_vcpu_free_hv, |
| 4468 | .check_requests = kvmppc_core_check_requests_hv, |
| 4469 | .get_dirty_log = kvm_vm_ioctl_get_dirty_log_hv, |
| 4470 | .flush_memslot = kvmppc_core_flush_memslot_hv, |
| 4471 | .prepare_memory_region = kvmppc_core_prepare_memory_region_hv, |
| 4472 | .commit_memory_region = kvmppc_core_commit_memory_region_hv, |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 4473 | .unmap_hva_range = kvm_unmap_hva_range_hv, |
| 4474 | .age_hva = kvm_age_hva_hv, |
| 4475 | .test_age_hva = kvm_test_age_hva_hv, |
| 4476 | .set_spte_hva = kvm_set_spte_hva_hv, |
| 4477 | .mmu_destroy = kvmppc_mmu_destroy_hv, |
| 4478 | .free_memslot = kvmppc_core_free_memslot_hv, |
| 4479 | .create_memslot = kvmppc_core_create_memslot_hv, |
| 4480 | .init_vm = kvmppc_core_init_vm_hv, |
| 4481 | .destroy_vm = kvmppc_core_destroy_vm_hv, |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 4482 | .get_smmu_info = kvm_vm_ioctl_get_smmu_info_hv, |
| 4483 | .emulate_op = kvmppc_core_emulate_op_hv, |
| 4484 | .emulate_mtspr = kvmppc_core_emulate_mtspr_hv, |
| 4485 | .emulate_mfspr = kvmppc_core_emulate_mfspr_hv, |
| 4486 | .fast_vcpu_kick = kvmppc_fast_vcpu_kick_hv, |
| 4487 | .arch_vm_ioctl = kvm_arch_vm_ioctl_hv, |
Paul Mackerras | ae2113a | 2014-06-02 11:03:00 +1000 | [diff] [blame] | 4488 | .hcall_implemented = kvmppc_hcall_impl_hv, |
Suresh Warrier | c57875f | 2016-08-19 15:35:50 +1000 | [diff] [blame] | 4489 | #ifdef CONFIG_KVM_XICS |
| 4490 | .irq_bypass_add_producer = kvmppc_irq_bypass_add_producer_hv, |
| 4491 | .irq_bypass_del_producer = kvmppc_irq_bypass_del_producer_hv, |
| 4492 | #endif |
Paul Mackerras | c927013 | 2017-01-30 21:21:41 +1100 | [diff] [blame] | 4493 | .configure_mmu = kvmhv_configure_mmu, |
| 4494 | .get_rmmu_info = kvmhv_get_rmmu_info, |
Paul Mackerras | 3c31352 | 2017-02-06 13:24:41 +1100 | [diff] [blame] | 4495 | .set_smt_mode = kvmhv_set_smt_mode, |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 4496 | }; |
| 4497 | |
Mahesh Salgaonkar | fd7bacb | 2016-05-15 09:44:26 +0530 | [diff] [blame] | 4498 | static int kvm_init_subcore_bitmap(void) |
| 4499 | { |
| 4500 | int i, j; |
| 4501 | int nr_cores = cpu_nr_cores(); |
| 4502 | struct sibling_subcore_state *sibling_subcore_state; |
| 4503 | |
| 4504 | for (i = 0; i < nr_cores; i++) { |
| 4505 | int first_cpu = i * threads_per_core; |
| 4506 | int node = cpu_to_node(first_cpu); |
| 4507 | |
| 4508 | /* Ignore if it is already allocated. */ |
Nicholas Piggin | d2e6007 | 2018-02-14 01:08:12 +1000 | [diff] [blame] | 4509 | if (paca_ptrs[first_cpu]->sibling_subcore_state) |
Mahesh Salgaonkar | fd7bacb | 2016-05-15 09:44:26 +0530 | [diff] [blame] | 4510 | continue; |
| 4511 | |
| 4512 | sibling_subcore_state = |
| 4513 | kmalloc_node(sizeof(struct sibling_subcore_state), |
| 4514 | GFP_KERNEL, node); |
| 4515 | if (!sibling_subcore_state) |
| 4516 | return -ENOMEM; |
| 4517 | |
| 4518 | memset(sibling_subcore_state, 0, |
| 4519 | sizeof(struct sibling_subcore_state)); |
| 4520 | |
| 4521 | for (j = 0; j < threads_per_core; j++) { |
| 4522 | int cpu = first_cpu + j; |
| 4523 | |
Nicholas Piggin | d2e6007 | 2018-02-14 01:08:12 +1000 | [diff] [blame] | 4524 | paca_ptrs[cpu]->sibling_subcore_state = |
| 4525 | sibling_subcore_state; |
Mahesh Salgaonkar | fd7bacb | 2016-05-15 09:44:26 +0530 | [diff] [blame] | 4526 | } |
| 4527 | } |
| 4528 | return 0; |
| 4529 | } |
| 4530 | |
Paul Mackerras | 5a31935 | 2017-01-30 21:21:46 +1100 | [diff] [blame] | 4531 | static int kvmppc_radix_possible(void) |
| 4532 | { |
| 4533 | return cpu_has_feature(CPU_FTR_ARCH_300) && radix_enabled(); |
| 4534 | } |
| 4535 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 4536 | static int kvmppc_book3s_init_hv(void) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 4537 | { |
| 4538 | int r; |
Aneesh Kumar K.V | cbbc58d | 2013-10-07 22:18:01 +0530 | [diff] [blame] | 4539 | /* |
| 4540 | * FIXME!! Do we need to check on all cpus ? |
| 4541 | */ |
| 4542 | r = kvmppc_core_check_processor_compat_hv(); |
| 4543 | if (r < 0) |
Paul Mackerras | 739e242 | 2014-03-25 10:47:05 +1100 | [diff] [blame] | 4544 | return -ENODEV; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 4545 | |
Mahesh Salgaonkar | fd7bacb | 2016-05-15 09:44:26 +0530 | [diff] [blame] | 4546 | r = kvm_init_subcore_bitmap(); |
| 4547 | if (r) |
| 4548 | return r; |
| 4549 | |
Paul Mackerras | f725758 | 2016-11-18 09:02:08 +1100 | [diff] [blame] | 4550 | /* |
| 4551 | * We need a way of accessing the XICS interrupt controller, |
Nicholas Piggin | d2e6007 | 2018-02-14 01:08:12 +1000 | [diff] [blame] | 4552 | * either directly, via paca_ptrs[cpu]->kvm_hstate.xics_phys, or |
Paul Mackerras | f725758 | 2016-11-18 09:02:08 +1100 | [diff] [blame] | 4553 | * indirectly, via OPAL. |
| 4554 | */ |
| 4555 | #ifdef CONFIG_SMP |
Paul Mackerras | fb7dcf7 | 2017-04-28 08:23:16 +1000 | [diff] [blame] | 4556 | if (!xive_enabled() && !local_paca->kvm_hstate.xics_phys) { |
Paul Mackerras | f725758 | 2016-11-18 09:02:08 +1100 | [diff] [blame] | 4557 | struct device_node *np; |
| 4558 | |
| 4559 | np = of_find_compatible_node(NULL, NULL, "ibm,opal-intc"); |
| 4560 | if (!np) { |
| 4561 | pr_err("KVM-HV: Cannot determine method for accessing XICS\n"); |
| 4562 | return -ENODEV; |
| 4563 | } |
Nicholas Mc Guire | 51eaa08 | 2018-07-07 08:53:07 +0200 | [diff] [blame^] | 4564 | /* presence of intc confirmed - node can be dropped again */ |
| 4565 | of_node_put(np); |
Paul Mackerras | f725758 | 2016-11-18 09:02:08 +1100 | [diff] [blame] | 4566 | } |
| 4567 | #endif |
| 4568 | |
Aneesh Kumar K.V | cbbc58d | 2013-10-07 22:18:01 +0530 | [diff] [blame] | 4569 | kvm_ops_hv.owner = THIS_MODULE; |
| 4570 | kvmppc_hv_ops = &kvm_ops_hv; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 4571 | |
Paul Mackerras | 699a0ea | 2014-06-02 11:02:59 +1000 | [diff] [blame] | 4572 | init_default_hcalls(); |
| 4573 | |
Paul Mackerras | ec25716 | 2015-06-24 21:18:03 +1000 | [diff] [blame] | 4574 | init_vcore_lists(); |
| 4575 | |
Aneesh Kumar K.V | cbbc58d | 2013-10-07 22:18:01 +0530 | [diff] [blame] | 4576 | r = kvmppc_mmu_hv_init(); |
Paul Mackerras | 5a31935 | 2017-01-30 21:21:46 +1100 | [diff] [blame] | 4577 | if (r) |
| 4578 | return r; |
| 4579 | |
| 4580 | if (kvmppc_radix_possible()) |
| 4581 | r = kvmppc_radix_init(); |
Paul Mackerras | 00608e1 | 2018-01-11 16:54:26 +1100 | [diff] [blame] | 4582 | |
| 4583 | /* |
| 4584 | * POWER9 chips before version 2.02 can't have some threads in |
| 4585 | * HPT mode and some in radix mode on the same core. |
| 4586 | */ |
| 4587 | if (cpu_has_feature(CPU_FTR_ARCH_300)) { |
| 4588 | unsigned int pvr = mfspr(SPRN_PVR); |
| 4589 | if ((pvr >> 16) == PVR_POWER9 && |
| 4590 | (((pvr & 0xe000) == 0 && (pvr & 0xfff) < 0x202) || |
| 4591 | ((pvr & 0xe000) == 0x2000 && (pvr & 0xfff) < 0x101))) |
| 4592 | no_mixing_hpt_and_radix = true; |
| 4593 | } |
| 4594 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 4595 | return r; |
| 4596 | } |
| 4597 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 4598 | static void kvmppc_book3s_exit_hv(void) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 4599 | { |
Suresh Warrier | 79b6c24 | 2015-12-17 14:59:06 -0600 | [diff] [blame] | 4600 | kvmppc_free_host_rm_ops(); |
Paul Mackerras | 5a31935 | 2017-01-30 21:21:46 +1100 | [diff] [blame] | 4601 | if (kvmppc_radix_possible()) |
| 4602 | kvmppc_radix_exit(); |
Aneesh Kumar K.V | cbbc58d | 2013-10-07 22:18:01 +0530 | [diff] [blame] | 4603 | kvmppc_hv_ops = NULL; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 4604 | } |
| 4605 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 4606 | module_init(kvmppc_book3s_init_hv); |
| 4607 | module_exit(kvmppc_book3s_exit_hv); |
Aneesh Kumar K.V | 2ba9f0d | 2013-10-07 22:17:59 +0530 | [diff] [blame] | 4608 | MODULE_LICENSE("GPL"); |
Alexander Graf | 398a76c | 2013-12-09 13:53:42 +0100 | [diff] [blame] | 4609 | MODULE_ALIAS_MISCDEV(KVM_MINOR); |
| 4610 | MODULE_ALIAS("devname:kvm"); |