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> |
| 22 | #include <linux/err.h> |
| 23 | #include <linux/slab.h> |
| 24 | #include <linux/preempt.h> |
| 25 | #include <linux/sched.h> |
| 26 | #include <linux/delay.h> |
Paul Gortmaker | 66b15db | 2011-05-27 10:46:24 -0400 | [diff] [blame] | 27 | #include <linux/export.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 28 | #include <linux/fs.h> |
| 29 | #include <linux/anon_inodes.h> |
| 30 | #include <linux/cpumask.h> |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 31 | #include <linux/spinlock.h> |
| 32 | #include <linux/page-flags.h> |
Paul Mackerras | 2c9097e | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 33 | #include <linux/srcu.h> |
Alexander Graf | 398a76c | 2013-12-09 13:53:42 +0100 | [diff] [blame] | 34 | #include <linux/miscdevice.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 35 | |
| 36 | #include <asm/reg.h> |
| 37 | #include <asm/cputable.h> |
| 38 | #include <asm/cacheflush.h> |
| 39 | #include <asm/tlbflush.h> |
| 40 | #include <asm/uaccess.h> |
| 41 | #include <asm/io.h> |
| 42 | #include <asm/kvm_ppc.h> |
| 43 | #include <asm/kvm_book3s.h> |
| 44 | #include <asm/mmu_context.h> |
| 45 | #include <asm/lppaca.h> |
| 46 | #include <asm/processor.h> |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 47 | #include <asm/cputhreads.h> |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 48 | #include <asm/page.h> |
Michael Neuling | de1d924 | 2011-11-09 20:39:49 +0000 | [diff] [blame] | 49 | #include <asm/hvcall.h> |
David Howells | ae3a197 | 2012-03-28 18:30:02 +0100 | [diff] [blame] | 50 | #include <asm/switch_to.h> |
Paul Mackerras | 512691d | 2012-10-15 01:15:41 +0000 | [diff] [blame] | 51 | #include <asm/smp.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 52 | #include <linux/gfp.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 53 | #include <linux/vmalloc.h> |
| 54 | #include <linux/highmem.h> |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 55 | #include <linux/hugetlb.h> |
Aneesh Kumar K.V | 2ba9f0d | 2013-10-07 22:17:59 +0530 | [diff] [blame] | 56 | #include <linux/module.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 57 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 58 | #include "book3s.h" |
| 59 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 60 | /* #define EXIT_DEBUG */ |
| 61 | /* #define EXIT_DEBUG_SIMPLE */ |
| 62 | /* #define EXIT_DEBUG_INT */ |
| 63 | |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 64 | /* Used to indicate that a guest page fault needs to be handled */ |
| 65 | #define RESUME_PAGE_FAULT (RESUME_GUEST | RESUME_FLAG_ARCH1) |
| 66 | |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 67 | /* Used as a "null" value for timebase values */ |
| 68 | #define TB_NIL (~(u64)0) |
| 69 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 70 | static void kvmppc_end_cede(struct kvm_vcpu *vcpu); |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 71 | static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 72 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 73 | static void kvmppc_fast_vcpu_kick_hv(struct kvm_vcpu *vcpu) |
Benjamin Herrenschmidt | 54695c3 | 2013-04-17 20:30:50 +0000 | [diff] [blame] | 74 | { |
| 75 | int me; |
| 76 | int cpu = vcpu->cpu; |
| 77 | wait_queue_head_t *wqp; |
| 78 | |
| 79 | wqp = kvm_arch_vcpu_wq(vcpu); |
| 80 | if (waitqueue_active(wqp)) { |
| 81 | wake_up_interruptible(wqp); |
| 82 | ++vcpu->stat.halt_wakeup; |
| 83 | } |
| 84 | |
| 85 | me = get_cpu(); |
| 86 | |
| 87 | /* CPU points to the first thread of the core */ |
| 88 | if (cpu != me && cpu >= 0 && cpu < nr_cpu_ids) { |
Andreas Schwab | 48eaef0 | 2013-12-30 15:36:56 +0100 | [diff] [blame] | 89 | #ifdef CONFIG_KVM_XICS |
Benjamin Herrenschmidt | 54695c3 | 2013-04-17 20:30:50 +0000 | [diff] [blame] | 90 | int real_cpu = cpu + vcpu->arch.ptid; |
| 91 | if (paca[real_cpu].kvm_hstate.xics_phys) |
| 92 | xics_wake_cpu(real_cpu); |
Andreas Schwab | 48eaef0 | 2013-12-30 15:36:56 +0100 | [diff] [blame] | 93 | else |
| 94 | #endif |
| 95 | if (cpu_online(cpu)) |
Benjamin Herrenschmidt | 54695c3 | 2013-04-17 20:30:50 +0000 | [diff] [blame] | 96 | smp_send_reschedule(cpu); |
| 97 | } |
| 98 | put_cpu(); |
| 99 | } |
| 100 | |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 101 | /* |
| 102 | * We use the vcpu_load/put functions to measure stolen time. |
| 103 | * Stolen time is counted as time when either the vcpu is able to |
| 104 | * run as part of a virtual core, but the task running the vcore |
| 105 | * is preempted or sleeping, or when the vcpu needs something done |
| 106 | * in the kernel by the task running the vcpu, but that task is |
| 107 | * preempted or sleeping. Those two things have to be counted |
| 108 | * separately, since one of the vcpu tasks will take on the job |
| 109 | * of running the core, and the other vcpu tasks in the vcore will |
| 110 | * sleep waiting for it to do that, but that sleep shouldn't count |
| 111 | * as stolen time. |
| 112 | * |
| 113 | * Hence we accumulate stolen time when the vcpu can run as part of |
| 114 | * a vcore using vc->stolen_tb, and the stolen time when the vcpu |
| 115 | * needs its task to do other things in the kernel (for example, |
| 116 | * service a page fault) in busy_stolen. We don't accumulate |
| 117 | * stolen time for a vcore when it is inactive, or for a vcpu |
| 118 | * when it is in state RUNNING or NOTREADY. NOTREADY is a bit of |
| 119 | * a misnomer; it means that the vcpu task is not executing in |
| 120 | * the KVM_VCPU_RUN ioctl, i.e. it is in userspace or elsewhere in |
| 121 | * the kernel. We don't have any way of dividing up that time |
| 122 | * between time that the vcpu is genuinely stopped, time that |
| 123 | * the task is actively working on behalf of the vcpu, and time |
| 124 | * that the task is preempted, so we don't count any of it as |
| 125 | * stolen. |
| 126 | * |
| 127 | * Updates to busy_stolen are protected by arch.tbacct_lock; |
| 128 | * updates to vc->stolen_tb are protected by the arch.tbacct_lock |
| 129 | * of the vcpu that has taken responsibility for running the vcore |
| 130 | * (i.e. vc->runner). The stolen times are measured in units of |
| 131 | * timebase ticks. (Note that the != TB_NIL checks below are |
| 132 | * purely defensive; they should never fail.) |
| 133 | */ |
| 134 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 135 | 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] | 136 | { |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 137 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
| 138 | |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 139 | spin_lock(&vcpu->arch.tbacct_lock); |
| 140 | if (vc->runner == vcpu && vc->vcore_state != VCORE_INACTIVE && |
| 141 | vc->preempt_tb != TB_NIL) { |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 142 | vc->stolen_tb += mftb() - vc->preempt_tb; |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 143 | vc->preempt_tb = TB_NIL; |
| 144 | } |
| 145 | if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST && |
| 146 | vcpu->arch.busy_preempt != TB_NIL) { |
| 147 | vcpu->arch.busy_stolen += mftb() - vcpu->arch.busy_preempt; |
| 148 | vcpu->arch.busy_preempt = TB_NIL; |
| 149 | } |
| 150 | spin_unlock(&vcpu->arch.tbacct_lock); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 151 | } |
| 152 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 153 | static void kvmppc_core_vcpu_put_hv(struct kvm_vcpu *vcpu) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 154 | { |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 155 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
| 156 | |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 157 | spin_lock(&vcpu->arch.tbacct_lock); |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 158 | if (vc->runner == vcpu && vc->vcore_state != VCORE_INACTIVE) |
| 159 | vc->preempt_tb = mftb(); |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 160 | if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST) |
| 161 | vcpu->arch.busy_preempt = mftb(); |
| 162 | spin_unlock(&vcpu->arch.tbacct_lock); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 163 | } |
| 164 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 165 | static void kvmppc_set_msr_hv(struct kvm_vcpu *vcpu, u64 msr) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 166 | { |
| 167 | vcpu->arch.shregs.msr = msr; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 168 | kvmppc_end_cede(vcpu); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 169 | } |
| 170 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 171 | void kvmppc_set_pvr_hv(struct kvm_vcpu *vcpu, u32 pvr) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 172 | { |
| 173 | vcpu->arch.pvr = pvr; |
| 174 | } |
| 175 | |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 176 | int kvmppc_set_arch_compat(struct kvm_vcpu *vcpu, u32 arch_compat) |
| 177 | { |
| 178 | unsigned long pcr = 0; |
| 179 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
| 180 | |
| 181 | if (arch_compat) { |
| 182 | if (!cpu_has_feature(CPU_FTR_ARCH_206)) |
| 183 | return -EINVAL; /* 970 has no compat mode support */ |
| 184 | |
| 185 | switch (arch_compat) { |
| 186 | case PVR_ARCH_205: |
Paul Mackerras | 5557ae0 | 2014-01-08 21:25:24 +1100 | [diff] [blame^] | 187 | /* |
| 188 | * If an arch bit is set in PCR, all the defined |
| 189 | * higher-order arch bits also have to be set. |
| 190 | */ |
| 191 | pcr = PCR_ARCH_206 | PCR_ARCH_205; |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 192 | break; |
| 193 | case PVR_ARCH_206: |
| 194 | case PVR_ARCH_206p: |
Paul Mackerras | 5557ae0 | 2014-01-08 21:25:24 +1100 | [diff] [blame^] | 195 | pcr = PCR_ARCH_206; |
| 196 | break; |
| 197 | case PVR_ARCH_207: |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 198 | break; |
| 199 | default: |
| 200 | return -EINVAL; |
| 201 | } |
Paul Mackerras | 5557ae0 | 2014-01-08 21:25:24 +1100 | [diff] [blame^] | 202 | |
| 203 | if (!cpu_has_feature(CPU_FTR_ARCH_207S)) { |
| 204 | /* POWER7 can't emulate POWER8 */ |
| 205 | if (!(pcr & PCR_ARCH_206)) |
| 206 | return -EINVAL; |
| 207 | pcr &= ~PCR_ARCH_206; |
| 208 | } |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 209 | } |
| 210 | |
| 211 | spin_lock(&vc->lock); |
| 212 | vc->arch_compat = arch_compat; |
| 213 | vc->pcr = pcr; |
| 214 | spin_unlock(&vc->lock); |
| 215 | |
| 216 | return 0; |
| 217 | } |
| 218 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 219 | void kvmppc_dump_regs(struct kvm_vcpu *vcpu) |
| 220 | { |
| 221 | int r; |
| 222 | |
| 223 | pr_err("vcpu %p (%d):\n", vcpu, vcpu->vcpu_id); |
| 224 | pr_err("pc = %.16lx msr = %.16llx trap = %x\n", |
| 225 | vcpu->arch.pc, vcpu->arch.shregs.msr, vcpu->arch.trap); |
| 226 | for (r = 0; r < 16; ++r) |
| 227 | pr_err("r%2d = %.16lx r%d = %.16lx\n", |
| 228 | r, kvmppc_get_gpr(vcpu, r), |
| 229 | r+16, kvmppc_get_gpr(vcpu, r+16)); |
| 230 | pr_err("ctr = %.16lx lr = %.16lx\n", |
| 231 | vcpu->arch.ctr, vcpu->arch.lr); |
| 232 | pr_err("srr0 = %.16llx srr1 = %.16llx\n", |
| 233 | vcpu->arch.shregs.srr0, vcpu->arch.shregs.srr1); |
| 234 | pr_err("sprg0 = %.16llx sprg1 = %.16llx\n", |
| 235 | vcpu->arch.shregs.sprg0, vcpu->arch.shregs.sprg1); |
| 236 | pr_err("sprg2 = %.16llx sprg3 = %.16llx\n", |
| 237 | vcpu->arch.shregs.sprg2, vcpu->arch.shregs.sprg3); |
| 238 | pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n", |
| 239 | vcpu->arch.cr, vcpu->arch.xer, vcpu->arch.shregs.dsisr); |
| 240 | pr_err("dar = %.16llx\n", vcpu->arch.shregs.dar); |
| 241 | pr_err("fault dar = %.16lx dsisr = %.8x\n", |
| 242 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); |
| 243 | pr_err("SLB (%d entries):\n", vcpu->arch.slb_max); |
| 244 | for (r = 0; r < vcpu->arch.slb_max; ++r) |
| 245 | pr_err(" ESID = %.16llx VSID = %.16llx\n", |
| 246 | vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv); |
| 247 | pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n", |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 248 | vcpu->arch.vcore->lpcr, vcpu->kvm->arch.sdr1, |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 249 | vcpu->arch.last_inst); |
| 250 | } |
| 251 | |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 252 | struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id) |
| 253 | { |
| 254 | int r; |
| 255 | struct kvm_vcpu *v, *ret = NULL; |
| 256 | |
| 257 | mutex_lock(&kvm->lock); |
| 258 | kvm_for_each_vcpu(r, v, kvm) { |
| 259 | if (v->vcpu_id == id) { |
| 260 | ret = v; |
| 261 | break; |
| 262 | } |
| 263 | } |
| 264 | mutex_unlock(&kvm->lock); |
| 265 | return ret; |
| 266 | } |
| 267 | |
| 268 | static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa) |
| 269 | { |
Anton Blanchard | f13c13a | 2013-08-07 02:01:26 +1000 | [diff] [blame] | 270 | vpa->__old_status |= LPPACA_OLD_SHARED_PROC; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 271 | vpa->yield_count = 1; |
| 272 | } |
| 273 | |
Paul Mackerras | 55b665b | 2012-09-25 20:33:06 +0000 | [diff] [blame] | 274 | static int set_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *v, |
| 275 | unsigned long addr, unsigned long len) |
| 276 | { |
| 277 | /* check address is cacheline aligned */ |
| 278 | if (addr & (L1_CACHE_BYTES - 1)) |
| 279 | return -EINVAL; |
| 280 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 281 | if (v->next_gpa != addr || v->len != len) { |
| 282 | v->next_gpa = addr; |
| 283 | v->len = addr ? len : 0; |
| 284 | v->update_pending = 1; |
| 285 | } |
| 286 | spin_unlock(&vcpu->arch.vpa_update_lock); |
| 287 | return 0; |
| 288 | } |
| 289 | |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 290 | /* Length for a per-processor buffer is passed in at offset 4 in the buffer */ |
| 291 | struct reg_vpa { |
| 292 | u32 dummy; |
| 293 | union { |
| 294 | u16 hword; |
| 295 | u32 word; |
| 296 | } length; |
| 297 | }; |
| 298 | |
| 299 | static int vpa_is_registered(struct kvmppc_vpa *vpap) |
| 300 | { |
| 301 | if (vpap->update_pending) |
| 302 | return vpap->next_gpa != 0; |
| 303 | return vpap->pinned_addr != NULL; |
| 304 | } |
| 305 | |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 306 | static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu, |
| 307 | unsigned long flags, |
| 308 | unsigned long vcpuid, unsigned long vpa) |
| 309 | { |
| 310 | struct kvm *kvm = vcpu->kvm; |
Paul Mackerras | 93e6024 | 2011-12-12 12:28:55 +0000 | [diff] [blame] | 311 | unsigned long len, nb; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 312 | void *va; |
| 313 | struct kvm_vcpu *tvcpu; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 314 | int err; |
| 315 | int subfunc; |
| 316 | struct kvmppc_vpa *vpap; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 317 | |
| 318 | tvcpu = kvmppc_find_vcpu(kvm, vcpuid); |
| 319 | if (!tvcpu) |
| 320 | return H_PARAMETER; |
| 321 | |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 322 | subfunc = (flags >> H_VPA_FUNC_SHIFT) & H_VPA_FUNC_MASK; |
| 323 | if (subfunc == H_VPA_REG_VPA || subfunc == H_VPA_REG_DTL || |
| 324 | subfunc == H_VPA_REG_SLB) { |
| 325 | /* Registering new area - address must be cache-line aligned */ |
| 326 | if ((vpa & (L1_CACHE_BYTES - 1)) || !vpa) |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 327 | return H_PARAMETER; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 328 | |
| 329 | /* convert logical addr to kernel addr and read length */ |
Paul Mackerras | 93e6024 | 2011-12-12 12:28:55 +0000 | [diff] [blame] | 330 | va = kvmppc_pin_guest_page(kvm, vpa, &nb); |
| 331 | if (va == NULL) |
Paul Mackerras | b2b2f16 | 2011-12-12 12:28:21 +0000 | [diff] [blame] | 332 | return H_PARAMETER; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 333 | if (subfunc == H_VPA_REG_VPA) |
| 334 | len = ((struct reg_vpa *)va)->length.hword; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 335 | else |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 336 | len = ((struct reg_vpa *)va)->length.word; |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 337 | kvmppc_unpin_guest_page(kvm, va, vpa, false); |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 338 | |
| 339 | /* Check length */ |
| 340 | if (len > nb || len < sizeof(struct reg_vpa)) |
| 341 | return H_PARAMETER; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 342 | } else { |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 343 | vpa = 0; |
| 344 | len = 0; |
| 345 | } |
| 346 | |
| 347 | err = H_PARAMETER; |
| 348 | vpap = NULL; |
| 349 | spin_lock(&tvcpu->arch.vpa_update_lock); |
| 350 | |
| 351 | switch (subfunc) { |
| 352 | case H_VPA_REG_VPA: /* register VPA */ |
| 353 | if (len < sizeof(struct lppaca)) |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 354 | break; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 355 | vpap = &tvcpu->arch.vpa; |
| 356 | err = 0; |
| 357 | break; |
| 358 | |
| 359 | case H_VPA_REG_DTL: /* register DTL */ |
| 360 | if (len < sizeof(struct dtl_entry)) |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 361 | break; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 362 | len -= len % sizeof(struct dtl_entry); |
| 363 | |
| 364 | /* Check that they have previously registered a VPA */ |
| 365 | err = H_RESOURCE; |
| 366 | if (!vpa_is_registered(&tvcpu->arch.vpa)) |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 367 | break; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 368 | |
| 369 | vpap = &tvcpu->arch.dtl; |
| 370 | err = 0; |
| 371 | break; |
| 372 | |
| 373 | case H_VPA_REG_SLB: /* register SLB shadow buffer */ |
| 374 | /* Check that they have previously registered a VPA */ |
| 375 | err = H_RESOURCE; |
| 376 | if (!vpa_is_registered(&tvcpu->arch.vpa)) |
| 377 | break; |
| 378 | |
| 379 | vpap = &tvcpu->arch.slb_shadow; |
| 380 | err = 0; |
| 381 | break; |
| 382 | |
| 383 | case H_VPA_DEREG_VPA: /* deregister VPA */ |
| 384 | /* Check they don't still have a DTL or SLB buf registered */ |
| 385 | err = H_RESOURCE; |
| 386 | if (vpa_is_registered(&tvcpu->arch.dtl) || |
| 387 | vpa_is_registered(&tvcpu->arch.slb_shadow)) |
| 388 | break; |
| 389 | |
| 390 | vpap = &tvcpu->arch.vpa; |
| 391 | err = 0; |
| 392 | break; |
| 393 | |
| 394 | case H_VPA_DEREG_DTL: /* deregister DTL */ |
| 395 | vpap = &tvcpu->arch.dtl; |
| 396 | err = 0; |
| 397 | break; |
| 398 | |
| 399 | case H_VPA_DEREG_SLB: /* deregister SLB shadow buffer */ |
| 400 | vpap = &tvcpu->arch.slb_shadow; |
| 401 | err = 0; |
| 402 | break; |
| 403 | } |
| 404 | |
| 405 | if (vpap) { |
| 406 | vpap->next_gpa = vpa; |
| 407 | vpap->len = len; |
| 408 | vpap->update_pending = 1; |
| 409 | } |
| 410 | |
| 411 | spin_unlock(&tvcpu->arch.vpa_update_lock); |
| 412 | |
| 413 | return err; |
| 414 | } |
| 415 | |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 416 | 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] | 417 | { |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 418 | struct kvm *kvm = vcpu->kvm; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 419 | void *va; |
| 420 | unsigned long nb; |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 421 | unsigned long gpa; |
| 422 | |
| 423 | /* |
| 424 | * We need to pin the page pointed to by vpap->next_gpa, |
| 425 | * but we can't call kvmppc_pin_guest_page under the lock |
| 426 | * as it does get_user_pages() and down_read(). So we |
| 427 | * have to drop the lock, pin the page, then get the lock |
| 428 | * again and check that a new area didn't get registered |
| 429 | * in the meantime. |
| 430 | */ |
| 431 | for (;;) { |
| 432 | gpa = vpap->next_gpa; |
| 433 | spin_unlock(&vcpu->arch.vpa_update_lock); |
| 434 | va = NULL; |
| 435 | nb = 0; |
| 436 | if (gpa) |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 437 | va = kvmppc_pin_guest_page(kvm, gpa, &nb); |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 438 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 439 | if (gpa == vpap->next_gpa) |
| 440 | break; |
| 441 | /* sigh... unpin that one and try again */ |
| 442 | if (va) |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 443 | kvmppc_unpin_guest_page(kvm, va, gpa, false); |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 444 | } |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 445 | |
| 446 | vpap->update_pending = 0; |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 447 | if (va && nb < vpap->len) { |
| 448 | /* |
| 449 | * If it's now too short, it must be that userspace |
| 450 | * has changed the mappings underlying guest memory, |
| 451 | * so unregister the region. |
| 452 | */ |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 453 | kvmppc_unpin_guest_page(kvm, va, gpa, false); |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 454 | va = NULL; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 455 | } |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 456 | if (vpap->pinned_addr) |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 457 | kvmppc_unpin_guest_page(kvm, vpap->pinned_addr, vpap->gpa, |
| 458 | vpap->dirty); |
| 459 | vpap->gpa = gpa; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 460 | vpap->pinned_addr = va; |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 461 | vpap->dirty = false; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 462 | if (va) |
| 463 | vpap->pinned_end = va + vpap->len; |
| 464 | } |
Paul Mackerras | 93e6024 | 2011-12-12 12:28:55 +0000 | [diff] [blame] | 465 | |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 466 | static void kvmppc_update_vpas(struct kvm_vcpu *vcpu) |
| 467 | { |
Paul Mackerras | 2f12f03 | 2012-10-15 01:17:17 +0000 | [diff] [blame] | 468 | if (!(vcpu->arch.vpa.update_pending || |
| 469 | vcpu->arch.slb_shadow.update_pending || |
| 470 | vcpu->arch.dtl.update_pending)) |
| 471 | return; |
| 472 | |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 473 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 474 | if (vcpu->arch.vpa.update_pending) { |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 475 | kvmppc_update_vpa(vcpu, &vcpu->arch.vpa); |
Paul Mackerras | 55b665b | 2012-09-25 20:33:06 +0000 | [diff] [blame] | 476 | if (vcpu->arch.vpa.pinned_addr) |
| 477 | init_vpa(vcpu, vcpu->arch.vpa.pinned_addr); |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 478 | } |
| 479 | if (vcpu->arch.dtl.update_pending) { |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 480 | kvmppc_update_vpa(vcpu, &vcpu->arch.dtl); |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 481 | vcpu->arch.dtl_ptr = vcpu->arch.dtl.pinned_addr; |
| 482 | vcpu->arch.dtl_index = 0; |
| 483 | } |
| 484 | if (vcpu->arch.slb_shadow.update_pending) |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 485 | kvmppc_update_vpa(vcpu, &vcpu->arch.slb_shadow); |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 486 | spin_unlock(&vcpu->arch.vpa_update_lock); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 487 | } |
| 488 | |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 489 | /* |
| 490 | * Return the accumulated stolen time for the vcore up until `now'. |
| 491 | * The caller should hold the vcore lock. |
| 492 | */ |
| 493 | static u64 vcore_stolen_time(struct kvmppc_vcore *vc, u64 now) |
| 494 | { |
| 495 | u64 p; |
| 496 | |
| 497 | /* |
| 498 | * If we are the task running the vcore, then since we hold |
| 499 | * the vcore lock, we can't be preempted, so stolen_tb/preempt_tb |
| 500 | * can't be updated, so we don't need the tbacct_lock. |
| 501 | * If the vcore is inactive, it can't become active (since we |
| 502 | * hold the vcore lock), so the vcpu load/put functions won't |
| 503 | * update stolen_tb/preempt_tb, and we don't need tbacct_lock. |
| 504 | */ |
| 505 | if (vc->vcore_state != VCORE_INACTIVE && |
| 506 | vc->runner->arch.run_task != current) { |
| 507 | spin_lock(&vc->runner->arch.tbacct_lock); |
| 508 | p = vc->stolen_tb; |
| 509 | if (vc->preempt_tb != TB_NIL) |
| 510 | p += now - vc->preempt_tb; |
| 511 | spin_unlock(&vc->runner->arch.tbacct_lock); |
| 512 | } else { |
| 513 | p = vc->stolen_tb; |
| 514 | } |
| 515 | return p; |
| 516 | } |
| 517 | |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 518 | static void kvmppc_create_dtl_entry(struct kvm_vcpu *vcpu, |
| 519 | struct kvmppc_vcore *vc) |
| 520 | { |
| 521 | struct dtl_entry *dt; |
| 522 | struct lppaca *vpa; |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 523 | unsigned long stolen; |
| 524 | unsigned long core_stolen; |
| 525 | u64 now; |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 526 | |
| 527 | dt = vcpu->arch.dtl_ptr; |
| 528 | vpa = vcpu->arch.vpa.pinned_addr; |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 529 | now = mftb(); |
| 530 | core_stolen = vcore_stolen_time(vc, now); |
| 531 | stolen = core_stolen - vcpu->arch.stolen_logged; |
| 532 | vcpu->arch.stolen_logged = core_stolen; |
| 533 | spin_lock(&vcpu->arch.tbacct_lock); |
| 534 | stolen += vcpu->arch.busy_stolen; |
| 535 | vcpu->arch.busy_stolen = 0; |
| 536 | spin_unlock(&vcpu->arch.tbacct_lock); |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 537 | if (!dt || !vpa) |
| 538 | return; |
| 539 | memset(dt, 0, sizeof(struct dtl_entry)); |
| 540 | dt->dispatch_reason = 7; |
| 541 | dt->processor_id = vc->pcpu + vcpu->arch.ptid; |
Paul Mackerras | 93b0f4d | 2013-09-06 13:17:46 +1000 | [diff] [blame] | 542 | dt->timebase = now + vc->tb_offset; |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 543 | dt->enqueue_to_dispatch_time = stolen; |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 544 | dt->srr0 = kvmppc_get_pc(vcpu); |
| 545 | dt->srr1 = vcpu->arch.shregs.msr; |
| 546 | ++dt; |
| 547 | if (dt == vcpu->arch.dtl.pinned_end) |
| 548 | dt = vcpu->arch.dtl.pinned_addr; |
| 549 | vcpu->arch.dtl_ptr = dt; |
| 550 | /* order writing *dt vs. writing vpa->dtl_idx */ |
| 551 | smp_wmb(); |
| 552 | vpa->dtl_idx = ++vcpu->arch.dtl_index; |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 553 | vcpu->arch.dtl.dirty = true; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 554 | } |
| 555 | |
| 556 | int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) |
| 557 | { |
| 558 | unsigned long req = kvmppc_get_gpr(vcpu, 3); |
| 559 | unsigned long target, ret = H_SUCCESS; |
| 560 | struct kvm_vcpu *tvcpu; |
Michael Ellerman | 8e591cb | 2013-04-17 20:30:00 +0000 | [diff] [blame] | 561 | int idx, rc; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 562 | |
| 563 | switch (req) { |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 564 | case H_ENTER: |
Paul Mackerras | 2c9097e | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 565 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 566 | ret = kvmppc_virtmode_h_enter(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 567 | kvmppc_get_gpr(vcpu, 5), |
| 568 | kvmppc_get_gpr(vcpu, 6), |
| 569 | kvmppc_get_gpr(vcpu, 7)); |
Paul Mackerras | 2c9097e | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 570 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 571 | break; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 572 | case H_CEDE: |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 573 | break; |
| 574 | case H_PROD: |
| 575 | target = kvmppc_get_gpr(vcpu, 4); |
| 576 | tvcpu = kvmppc_find_vcpu(vcpu->kvm, target); |
| 577 | if (!tvcpu) { |
| 578 | ret = H_PARAMETER; |
| 579 | break; |
| 580 | } |
| 581 | tvcpu->arch.prodded = 1; |
| 582 | smp_mb(); |
| 583 | if (vcpu->arch.ceded) { |
| 584 | if (waitqueue_active(&vcpu->wq)) { |
| 585 | wake_up_interruptible(&vcpu->wq); |
| 586 | vcpu->stat.halt_wakeup++; |
| 587 | } |
| 588 | } |
| 589 | break; |
| 590 | case H_CONFER: |
Paul Mackerras | 42d7604 | 2013-09-06 13:23:21 +1000 | [diff] [blame] | 591 | target = kvmppc_get_gpr(vcpu, 4); |
| 592 | if (target == -1) |
| 593 | break; |
| 594 | tvcpu = kvmppc_find_vcpu(vcpu->kvm, target); |
| 595 | if (!tvcpu) { |
| 596 | ret = H_PARAMETER; |
| 597 | break; |
| 598 | } |
| 599 | kvm_vcpu_yield_to(tvcpu); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 600 | break; |
| 601 | case H_REGISTER_VPA: |
| 602 | ret = do_h_register_vpa(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 603 | kvmppc_get_gpr(vcpu, 5), |
| 604 | kvmppc_get_gpr(vcpu, 6)); |
| 605 | break; |
Michael Ellerman | 8e591cb | 2013-04-17 20:30:00 +0000 | [diff] [blame] | 606 | case H_RTAS: |
| 607 | if (list_empty(&vcpu->kvm->arch.rtas_tokens)) |
| 608 | return RESUME_HOST; |
| 609 | |
| 610 | rc = kvmppc_rtas_hcall(vcpu); |
| 611 | |
| 612 | if (rc == -ENOENT) |
| 613 | return RESUME_HOST; |
| 614 | else if (rc == 0) |
| 615 | break; |
| 616 | |
| 617 | /* Send the error out to userspace via KVM_RUN */ |
| 618 | return rc; |
Benjamin Herrenschmidt | bc5ad3f | 2013-04-17 20:30:26 +0000 | [diff] [blame] | 619 | |
| 620 | case H_XIRR: |
| 621 | case H_CPPR: |
| 622 | case H_EOI: |
| 623 | case H_IPI: |
Paul Mackerras | 8e44ddc | 2013-05-23 15:42:21 +0000 | [diff] [blame] | 624 | case H_IPOLL: |
| 625 | case H_XIRR_X: |
Benjamin Herrenschmidt | bc5ad3f | 2013-04-17 20:30:26 +0000 | [diff] [blame] | 626 | if (kvmppc_xics_enabled(vcpu)) { |
| 627 | ret = kvmppc_xics_hcall(vcpu, req); |
| 628 | break; |
| 629 | } /* fallthrough */ |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 630 | default: |
| 631 | return RESUME_HOST; |
| 632 | } |
| 633 | kvmppc_set_gpr(vcpu, 3, ret); |
| 634 | vcpu->arch.hcall_needed = 0; |
| 635 | return RESUME_GUEST; |
| 636 | } |
| 637 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 638 | static int kvmppc_handle_exit_hv(struct kvm_run *run, struct kvm_vcpu *vcpu, |
| 639 | struct task_struct *tsk) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 640 | { |
| 641 | int r = RESUME_HOST; |
| 642 | |
| 643 | vcpu->stat.sum_exits++; |
| 644 | |
| 645 | run->exit_reason = KVM_EXIT_UNKNOWN; |
| 646 | run->ready_for_interrupt_injection = 1; |
| 647 | switch (vcpu->arch.trap) { |
| 648 | /* We're good on these - the host merely wanted to get our attention */ |
| 649 | case BOOK3S_INTERRUPT_HV_DECREMENTER: |
| 650 | vcpu->stat.dec_exits++; |
| 651 | r = RESUME_GUEST; |
| 652 | break; |
| 653 | case BOOK3S_INTERRUPT_EXTERNAL: |
| 654 | vcpu->stat.ext_intr_exits++; |
| 655 | r = RESUME_GUEST; |
| 656 | break; |
| 657 | case BOOK3S_INTERRUPT_PERFMON: |
| 658 | r = RESUME_GUEST; |
| 659 | break; |
Paul Mackerras | b4072df | 2012-11-23 22:37:50 +0000 | [diff] [blame] | 660 | case BOOK3S_INTERRUPT_MACHINE_CHECK: |
| 661 | /* |
| 662 | * Deliver a machine check interrupt to the guest. |
| 663 | * We have to do this, even if the host has handled the |
| 664 | * machine check, because machine checks use SRR0/1 and |
| 665 | * the interrupt might have trashed guest state in them. |
| 666 | */ |
| 667 | kvmppc_book3s_queue_irqprio(vcpu, |
| 668 | BOOK3S_INTERRUPT_MACHINE_CHECK); |
| 669 | r = RESUME_GUEST; |
| 670 | break; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 671 | case BOOK3S_INTERRUPT_PROGRAM: |
| 672 | { |
| 673 | ulong flags; |
| 674 | /* |
| 675 | * Normally program interrupts are delivered directly |
| 676 | * to the guest by the hardware, but we can get here |
| 677 | * as a result of a hypervisor emulation interrupt |
| 678 | * (e40) getting turned into a 700 by BML RTAS. |
| 679 | */ |
| 680 | flags = vcpu->arch.shregs.msr & 0x1f0000ull; |
| 681 | kvmppc_core_queue_program(vcpu, flags); |
| 682 | r = RESUME_GUEST; |
| 683 | break; |
| 684 | } |
| 685 | case BOOK3S_INTERRUPT_SYSCALL: |
| 686 | { |
| 687 | /* hcall - punt to userspace */ |
| 688 | int i; |
| 689 | |
Liu Ping Fan | 27025a6 | 2013-11-19 14:12:48 +0800 | [diff] [blame] | 690 | /* hypercall with MSR_PR has already been handled in rmode, |
| 691 | * and never reaches here. |
| 692 | */ |
| 693 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 694 | run->papr_hcall.nr = kvmppc_get_gpr(vcpu, 3); |
| 695 | for (i = 0; i < 9; ++i) |
| 696 | run->papr_hcall.args[i] = kvmppc_get_gpr(vcpu, 4 + i); |
| 697 | run->exit_reason = KVM_EXIT_PAPR_HCALL; |
| 698 | vcpu->arch.hcall_needed = 1; |
| 699 | r = RESUME_HOST; |
| 700 | break; |
| 701 | } |
| 702 | /* |
Paul Mackerras | 342d3db | 2011-12-12 12:38:05 +0000 | [diff] [blame] | 703 | * We get these next two if the guest accesses a page which it thinks |
| 704 | * it has mapped but which is not actually present, either because |
| 705 | * it is for an emulated I/O device or because the corresonding |
| 706 | * host page has been paged out. Any other HDSI/HISI interrupts |
| 707 | * have been handled already. |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 708 | */ |
| 709 | case BOOK3S_INTERRUPT_H_DATA_STORAGE: |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 710 | r = RESUME_PAGE_FAULT; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 711 | break; |
| 712 | case BOOK3S_INTERRUPT_H_INST_STORAGE: |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 713 | vcpu->arch.fault_dar = kvmppc_get_pc(vcpu); |
| 714 | vcpu->arch.fault_dsisr = 0; |
| 715 | r = RESUME_PAGE_FAULT; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 716 | break; |
| 717 | /* |
| 718 | * This occurs if the guest executes an illegal instruction. |
| 719 | * We just generate a program interrupt to the guest, since |
| 720 | * we don't emulate any guest instructions at this stage. |
| 721 | */ |
| 722 | case BOOK3S_INTERRUPT_H_EMUL_ASSIST: |
Michael Ellerman | bd3048b | 2014-01-08 21:25:23 +1100 | [diff] [blame] | 723 | kvmppc_core_queue_program(vcpu, SRR1_PROGILL); |
| 724 | r = RESUME_GUEST; |
| 725 | break; |
| 726 | /* |
| 727 | * This occurs if the guest (kernel or userspace), does something that |
| 728 | * is prohibited by HFSCR. We just generate a program interrupt to |
| 729 | * the guest. |
| 730 | */ |
| 731 | case BOOK3S_INTERRUPT_H_FAC_UNAVAIL: |
| 732 | kvmppc_core_queue_program(vcpu, SRR1_PROGILL); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 733 | r = RESUME_GUEST; |
| 734 | break; |
| 735 | default: |
| 736 | kvmppc_dump_regs(vcpu); |
| 737 | printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n", |
| 738 | vcpu->arch.trap, kvmppc_get_pc(vcpu), |
| 739 | vcpu->arch.shregs.msr); |
Paul Mackerras | f3271d4 | 2013-09-20 14:52:41 +1000 | [diff] [blame] | 740 | run->hw.hardware_exit_reason = vcpu->arch.trap; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 741 | r = RESUME_HOST; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 742 | break; |
| 743 | } |
| 744 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 745 | return r; |
| 746 | } |
| 747 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 748 | static int kvm_arch_vcpu_ioctl_get_sregs_hv(struct kvm_vcpu *vcpu, |
| 749 | struct kvm_sregs *sregs) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 750 | { |
| 751 | int i; |
| 752 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 753 | memset(sregs, 0, sizeof(struct kvm_sregs)); |
Aneesh Kumar K.V | 8791644 | 2013-08-22 17:08:39 +0530 | [diff] [blame] | 754 | sregs->pvr = vcpu->arch.pvr; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 755 | for (i = 0; i < vcpu->arch.slb_max; i++) { |
| 756 | sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige; |
| 757 | sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv; |
| 758 | } |
| 759 | |
| 760 | return 0; |
| 761 | } |
| 762 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 763 | static int kvm_arch_vcpu_ioctl_set_sregs_hv(struct kvm_vcpu *vcpu, |
| 764 | struct kvm_sregs *sregs) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 765 | { |
| 766 | int i, j; |
| 767 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 768 | kvmppc_set_pvr_hv(vcpu, sregs->pvr); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 769 | |
| 770 | j = 0; |
| 771 | for (i = 0; i < vcpu->arch.slb_nr; i++) { |
| 772 | if (sregs->u.s.ppc64.slb[i].slbe & SLB_ESID_V) { |
| 773 | vcpu->arch.slb[j].orige = sregs->u.s.ppc64.slb[i].slbe; |
| 774 | vcpu->arch.slb[j].origv = sregs->u.s.ppc64.slb[i].slbv; |
| 775 | ++j; |
| 776 | } |
| 777 | } |
| 778 | vcpu->arch.slb_max = j; |
| 779 | |
| 780 | return 0; |
| 781 | } |
| 782 | |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 783 | static void kvmppc_set_lpcr(struct kvm_vcpu *vcpu, u64 new_lpcr) |
| 784 | { |
| 785 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
| 786 | u64 mask; |
| 787 | |
| 788 | spin_lock(&vc->lock); |
| 789 | /* |
| 790 | * Userspace can only modify DPFD (default prefetch depth), |
| 791 | * ILE (interrupt little-endian) and TC (translation control). |
| 792 | */ |
| 793 | mask = LPCR_DPFD | LPCR_ILE | LPCR_TC; |
| 794 | vc->lpcr = (vc->lpcr & ~mask) | (new_lpcr & mask); |
| 795 | spin_unlock(&vc->lock); |
| 796 | } |
| 797 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 798 | static int kvmppc_get_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, |
| 799 | union kvmppc_one_reg *val) |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 800 | { |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 801 | int r = 0; |
| 802 | long int i; |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 803 | |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 804 | switch (id) { |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 805 | case KVM_REG_PPC_HIOR: |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 806 | *val = get_reg_val(id, 0); |
| 807 | break; |
| 808 | case KVM_REG_PPC_DABR: |
| 809 | *val = get_reg_val(id, vcpu->arch.dabr); |
| 810 | break; |
| 811 | case KVM_REG_PPC_DSCR: |
| 812 | *val = get_reg_val(id, vcpu->arch.dscr); |
| 813 | break; |
| 814 | case KVM_REG_PPC_PURR: |
| 815 | *val = get_reg_val(id, vcpu->arch.purr); |
| 816 | break; |
| 817 | case KVM_REG_PPC_SPURR: |
| 818 | *val = get_reg_val(id, vcpu->arch.spurr); |
| 819 | break; |
| 820 | case KVM_REG_PPC_AMR: |
| 821 | *val = get_reg_val(id, vcpu->arch.amr); |
| 822 | break; |
| 823 | case KVM_REG_PPC_UAMOR: |
| 824 | *val = get_reg_val(id, vcpu->arch.uamor); |
| 825 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 826 | case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRS: |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 827 | i = id - KVM_REG_PPC_MMCR0; |
| 828 | *val = get_reg_val(id, vcpu->arch.mmcr[i]); |
| 829 | break; |
| 830 | case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8: |
| 831 | i = id - KVM_REG_PPC_PMC1; |
| 832 | *val = get_reg_val(id, vcpu->arch.pmc[i]); |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 833 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 834 | case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2: |
| 835 | i = id - KVM_REG_PPC_SPMC1; |
| 836 | *val = get_reg_val(id, vcpu->arch.spmc[i]); |
| 837 | break; |
Paul Mackerras | 1494178 | 2013-09-06 13:11:18 +1000 | [diff] [blame] | 838 | case KVM_REG_PPC_SIAR: |
| 839 | *val = get_reg_val(id, vcpu->arch.siar); |
| 840 | break; |
| 841 | case KVM_REG_PPC_SDAR: |
| 842 | *val = get_reg_val(id, vcpu->arch.sdar); |
| 843 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 844 | case KVM_REG_PPC_SIER: |
| 845 | *val = get_reg_val(id, vcpu->arch.sier); |
| 846 | break; |
| 847 | case KVM_REG_PPC_IAMR: |
| 848 | *val = get_reg_val(id, vcpu->arch.iamr); |
| 849 | break; |
| 850 | case KVM_REG_PPC_TFHAR: |
| 851 | *val = get_reg_val(id, vcpu->arch.tfhar); |
| 852 | break; |
| 853 | case KVM_REG_PPC_TFIAR: |
| 854 | *val = get_reg_val(id, vcpu->arch.tfiar); |
| 855 | break; |
| 856 | case KVM_REG_PPC_TEXASR: |
| 857 | *val = get_reg_val(id, vcpu->arch.texasr); |
| 858 | break; |
| 859 | case KVM_REG_PPC_FSCR: |
| 860 | *val = get_reg_val(id, vcpu->arch.fscr); |
| 861 | break; |
| 862 | case KVM_REG_PPC_PSPB: |
| 863 | *val = get_reg_val(id, vcpu->arch.pspb); |
| 864 | break; |
| 865 | case KVM_REG_PPC_EBBHR: |
| 866 | *val = get_reg_val(id, vcpu->arch.ebbhr); |
| 867 | break; |
| 868 | case KVM_REG_PPC_EBBRR: |
| 869 | *val = get_reg_val(id, vcpu->arch.ebbrr); |
| 870 | break; |
| 871 | case KVM_REG_PPC_BESCR: |
| 872 | *val = get_reg_val(id, vcpu->arch.bescr); |
| 873 | break; |
| 874 | case KVM_REG_PPC_TAR: |
| 875 | *val = get_reg_val(id, vcpu->arch.tar); |
| 876 | break; |
| 877 | case KVM_REG_PPC_DPDES: |
| 878 | *val = get_reg_val(id, vcpu->arch.vcore->dpdes); |
| 879 | break; |
| 880 | case KVM_REG_PPC_DAWR: |
| 881 | *val = get_reg_val(id, vcpu->arch.dawr); |
| 882 | break; |
| 883 | case KVM_REG_PPC_DAWRX: |
| 884 | *val = get_reg_val(id, vcpu->arch.dawrx); |
| 885 | break; |
| 886 | case KVM_REG_PPC_CIABR: |
| 887 | *val = get_reg_val(id, vcpu->arch.ciabr); |
| 888 | break; |
| 889 | case KVM_REG_PPC_IC: |
| 890 | *val = get_reg_val(id, vcpu->arch.ic); |
| 891 | break; |
| 892 | case KVM_REG_PPC_VTB: |
| 893 | *val = get_reg_val(id, vcpu->arch.vtb); |
| 894 | break; |
| 895 | case KVM_REG_PPC_CSIGR: |
| 896 | *val = get_reg_val(id, vcpu->arch.csigr); |
| 897 | break; |
| 898 | case KVM_REG_PPC_TACR: |
| 899 | *val = get_reg_val(id, vcpu->arch.tacr); |
| 900 | break; |
| 901 | case KVM_REG_PPC_TCSCR: |
| 902 | *val = get_reg_val(id, vcpu->arch.tcscr); |
| 903 | break; |
| 904 | case KVM_REG_PPC_PID: |
| 905 | *val = get_reg_val(id, vcpu->arch.pid); |
| 906 | break; |
| 907 | case KVM_REG_PPC_ACOP: |
| 908 | *val = get_reg_val(id, vcpu->arch.acop); |
| 909 | break; |
| 910 | case KVM_REG_PPC_WORT: |
| 911 | *val = get_reg_val(id, vcpu->arch.wort); |
| 912 | break; |
Paul Mackerras | 55b665b | 2012-09-25 20:33:06 +0000 | [diff] [blame] | 913 | case KVM_REG_PPC_VPA_ADDR: |
| 914 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 915 | *val = get_reg_val(id, vcpu->arch.vpa.next_gpa); |
| 916 | spin_unlock(&vcpu->arch.vpa_update_lock); |
| 917 | break; |
| 918 | case KVM_REG_PPC_VPA_SLB: |
| 919 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 920 | val->vpaval.addr = vcpu->arch.slb_shadow.next_gpa; |
| 921 | val->vpaval.length = vcpu->arch.slb_shadow.len; |
| 922 | spin_unlock(&vcpu->arch.vpa_update_lock); |
| 923 | break; |
| 924 | case KVM_REG_PPC_VPA_DTL: |
| 925 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 926 | val->vpaval.addr = vcpu->arch.dtl.next_gpa; |
| 927 | val->vpaval.length = vcpu->arch.dtl.len; |
| 928 | spin_unlock(&vcpu->arch.vpa_update_lock); |
| 929 | break; |
Paul Mackerras | 93b0f4d | 2013-09-06 13:17:46 +1000 | [diff] [blame] | 930 | case KVM_REG_PPC_TB_OFFSET: |
| 931 | *val = get_reg_val(id, vcpu->arch.vcore->tb_offset); |
| 932 | break; |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 933 | case KVM_REG_PPC_LPCR: |
| 934 | *val = get_reg_val(id, vcpu->arch.vcore->lpcr); |
| 935 | break; |
Paul Mackerras | 4b8473c | 2013-09-20 14:52:39 +1000 | [diff] [blame] | 936 | case KVM_REG_PPC_PPR: |
| 937 | *val = get_reg_val(id, vcpu->arch.ppr); |
| 938 | break; |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 939 | case KVM_REG_PPC_ARCH_COMPAT: |
| 940 | *val = get_reg_val(id, vcpu->arch.vcore->arch_compat); |
| 941 | break; |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 942 | default: |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 943 | r = -EINVAL; |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 944 | break; |
| 945 | } |
| 946 | |
| 947 | return r; |
| 948 | } |
| 949 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 950 | static int kvmppc_set_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, |
| 951 | union kvmppc_one_reg *val) |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 952 | { |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 953 | int r = 0; |
| 954 | long int i; |
Paul Mackerras | 55b665b | 2012-09-25 20:33:06 +0000 | [diff] [blame] | 955 | unsigned long addr, len; |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 956 | |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 957 | switch (id) { |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 958 | case KVM_REG_PPC_HIOR: |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 959 | /* Only allow this to be set to zero */ |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 960 | if (set_reg_val(id, *val)) |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 961 | r = -EINVAL; |
| 962 | break; |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 963 | case KVM_REG_PPC_DABR: |
| 964 | vcpu->arch.dabr = set_reg_val(id, *val); |
| 965 | break; |
| 966 | case KVM_REG_PPC_DSCR: |
| 967 | vcpu->arch.dscr = set_reg_val(id, *val); |
| 968 | break; |
| 969 | case KVM_REG_PPC_PURR: |
| 970 | vcpu->arch.purr = set_reg_val(id, *val); |
| 971 | break; |
| 972 | case KVM_REG_PPC_SPURR: |
| 973 | vcpu->arch.spurr = set_reg_val(id, *val); |
| 974 | break; |
| 975 | case KVM_REG_PPC_AMR: |
| 976 | vcpu->arch.amr = set_reg_val(id, *val); |
| 977 | break; |
| 978 | case KVM_REG_PPC_UAMOR: |
| 979 | vcpu->arch.uamor = set_reg_val(id, *val); |
| 980 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 981 | case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRS: |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 982 | i = id - KVM_REG_PPC_MMCR0; |
| 983 | vcpu->arch.mmcr[i] = set_reg_val(id, *val); |
| 984 | break; |
| 985 | case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8: |
| 986 | i = id - KVM_REG_PPC_PMC1; |
| 987 | vcpu->arch.pmc[i] = set_reg_val(id, *val); |
| 988 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 989 | case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2: |
| 990 | i = id - KVM_REG_PPC_SPMC1; |
| 991 | vcpu->arch.spmc[i] = set_reg_val(id, *val); |
| 992 | break; |
Paul Mackerras | 1494178 | 2013-09-06 13:11:18 +1000 | [diff] [blame] | 993 | case KVM_REG_PPC_SIAR: |
| 994 | vcpu->arch.siar = set_reg_val(id, *val); |
| 995 | break; |
| 996 | case KVM_REG_PPC_SDAR: |
| 997 | vcpu->arch.sdar = set_reg_val(id, *val); |
| 998 | break; |
Michael Neuling | b005255e | 2014-01-08 21:25:21 +1100 | [diff] [blame] | 999 | case KVM_REG_PPC_SIER: |
| 1000 | vcpu->arch.sier = set_reg_val(id, *val); |
| 1001 | break; |
| 1002 | case KVM_REG_PPC_IAMR: |
| 1003 | vcpu->arch.iamr = set_reg_val(id, *val); |
| 1004 | break; |
| 1005 | case KVM_REG_PPC_TFHAR: |
| 1006 | vcpu->arch.tfhar = set_reg_val(id, *val); |
| 1007 | break; |
| 1008 | case KVM_REG_PPC_TFIAR: |
| 1009 | vcpu->arch.tfiar = set_reg_val(id, *val); |
| 1010 | break; |
| 1011 | case KVM_REG_PPC_TEXASR: |
| 1012 | vcpu->arch.texasr = set_reg_val(id, *val); |
| 1013 | break; |
| 1014 | case KVM_REG_PPC_FSCR: |
| 1015 | vcpu->arch.fscr = set_reg_val(id, *val); |
| 1016 | break; |
| 1017 | case KVM_REG_PPC_PSPB: |
| 1018 | vcpu->arch.pspb = set_reg_val(id, *val); |
| 1019 | break; |
| 1020 | case KVM_REG_PPC_EBBHR: |
| 1021 | vcpu->arch.ebbhr = set_reg_val(id, *val); |
| 1022 | break; |
| 1023 | case KVM_REG_PPC_EBBRR: |
| 1024 | vcpu->arch.ebbrr = set_reg_val(id, *val); |
| 1025 | break; |
| 1026 | case KVM_REG_PPC_BESCR: |
| 1027 | vcpu->arch.bescr = set_reg_val(id, *val); |
| 1028 | break; |
| 1029 | case KVM_REG_PPC_TAR: |
| 1030 | vcpu->arch.tar = set_reg_val(id, *val); |
| 1031 | break; |
| 1032 | case KVM_REG_PPC_DPDES: |
| 1033 | vcpu->arch.vcore->dpdes = set_reg_val(id, *val); |
| 1034 | break; |
| 1035 | case KVM_REG_PPC_DAWR: |
| 1036 | vcpu->arch.dawr = set_reg_val(id, *val); |
| 1037 | break; |
| 1038 | case KVM_REG_PPC_DAWRX: |
| 1039 | vcpu->arch.dawrx = set_reg_val(id, *val) & ~DAWRX_HYP; |
| 1040 | break; |
| 1041 | case KVM_REG_PPC_CIABR: |
| 1042 | vcpu->arch.ciabr = set_reg_val(id, *val); |
| 1043 | /* Don't allow setting breakpoints in hypervisor code */ |
| 1044 | if ((vcpu->arch.ciabr & CIABR_PRIV) == CIABR_PRIV_HYPER) |
| 1045 | vcpu->arch.ciabr &= ~CIABR_PRIV; /* disable */ |
| 1046 | break; |
| 1047 | case KVM_REG_PPC_IC: |
| 1048 | vcpu->arch.ic = set_reg_val(id, *val); |
| 1049 | break; |
| 1050 | case KVM_REG_PPC_VTB: |
| 1051 | vcpu->arch.vtb = set_reg_val(id, *val); |
| 1052 | break; |
| 1053 | case KVM_REG_PPC_CSIGR: |
| 1054 | vcpu->arch.csigr = set_reg_val(id, *val); |
| 1055 | break; |
| 1056 | case KVM_REG_PPC_TACR: |
| 1057 | vcpu->arch.tacr = set_reg_val(id, *val); |
| 1058 | break; |
| 1059 | case KVM_REG_PPC_TCSCR: |
| 1060 | vcpu->arch.tcscr = set_reg_val(id, *val); |
| 1061 | break; |
| 1062 | case KVM_REG_PPC_PID: |
| 1063 | vcpu->arch.pid = set_reg_val(id, *val); |
| 1064 | break; |
| 1065 | case KVM_REG_PPC_ACOP: |
| 1066 | vcpu->arch.acop = set_reg_val(id, *val); |
| 1067 | break; |
| 1068 | case KVM_REG_PPC_WORT: |
| 1069 | vcpu->arch.wort = set_reg_val(id, *val); |
| 1070 | break; |
Paul Mackerras | 55b665b | 2012-09-25 20:33:06 +0000 | [diff] [blame] | 1071 | case KVM_REG_PPC_VPA_ADDR: |
| 1072 | addr = set_reg_val(id, *val); |
| 1073 | r = -EINVAL; |
| 1074 | if (!addr && (vcpu->arch.slb_shadow.next_gpa || |
| 1075 | vcpu->arch.dtl.next_gpa)) |
| 1076 | break; |
| 1077 | r = set_vpa(vcpu, &vcpu->arch.vpa, addr, sizeof(struct lppaca)); |
| 1078 | break; |
| 1079 | case KVM_REG_PPC_VPA_SLB: |
| 1080 | addr = val->vpaval.addr; |
| 1081 | len = val->vpaval.length; |
| 1082 | r = -EINVAL; |
| 1083 | if (addr && !vcpu->arch.vpa.next_gpa) |
| 1084 | break; |
| 1085 | r = set_vpa(vcpu, &vcpu->arch.slb_shadow, addr, len); |
| 1086 | break; |
| 1087 | case KVM_REG_PPC_VPA_DTL: |
| 1088 | addr = val->vpaval.addr; |
| 1089 | len = val->vpaval.length; |
| 1090 | r = -EINVAL; |
Paul Mackerras | 9f8c8c7 | 2012-10-15 01:18:37 +0000 | [diff] [blame] | 1091 | if (addr && (len < sizeof(struct dtl_entry) || |
| 1092 | !vcpu->arch.vpa.next_gpa)) |
Paul Mackerras | 55b665b | 2012-09-25 20:33:06 +0000 | [diff] [blame] | 1093 | break; |
| 1094 | len -= len % sizeof(struct dtl_entry); |
| 1095 | r = set_vpa(vcpu, &vcpu->arch.dtl, addr, len); |
| 1096 | break; |
Paul Mackerras | 93b0f4d | 2013-09-06 13:17:46 +1000 | [diff] [blame] | 1097 | case KVM_REG_PPC_TB_OFFSET: |
| 1098 | /* round up to multiple of 2^24 */ |
| 1099 | vcpu->arch.vcore->tb_offset = |
| 1100 | ALIGN(set_reg_val(id, *val), 1UL << 24); |
| 1101 | break; |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 1102 | case KVM_REG_PPC_LPCR: |
| 1103 | kvmppc_set_lpcr(vcpu, set_reg_val(id, *val)); |
| 1104 | break; |
Paul Mackerras | 4b8473c | 2013-09-20 14:52:39 +1000 | [diff] [blame] | 1105 | case KVM_REG_PPC_PPR: |
| 1106 | vcpu->arch.ppr = set_reg_val(id, *val); |
| 1107 | break; |
Paul Mackerras | 388cc6e | 2013-09-21 14:35:02 +1000 | [diff] [blame] | 1108 | case KVM_REG_PPC_ARCH_COMPAT: |
| 1109 | r = kvmppc_set_arch_compat(vcpu, set_reg_val(id, *val)); |
| 1110 | break; |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 1111 | default: |
Paul Mackerras | a136a8b | 2012-09-25 20:31:56 +0000 | [diff] [blame] | 1112 | r = -EINVAL; |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 1113 | break; |
| 1114 | } |
| 1115 | |
| 1116 | return r; |
| 1117 | } |
| 1118 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 1119 | static struct kvm_vcpu *kvmppc_core_vcpu_create_hv(struct kvm *kvm, |
| 1120 | unsigned int id) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1121 | { |
| 1122 | struct kvm_vcpu *vcpu; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1123 | int err = -EINVAL; |
| 1124 | int core; |
| 1125 | struct kvmppc_vcore *vcore; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1126 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1127 | core = id / threads_per_core; |
| 1128 | if (core >= KVM_MAX_VCORES) |
| 1129 | goto out; |
| 1130 | |
| 1131 | err = -ENOMEM; |
Sasha Levin | 6b75e6b | 2011-12-07 10:24:56 +0200 | [diff] [blame] | 1132 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1133 | if (!vcpu) |
| 1134 | goto out; |
| 1135 | |
| 1136 | err = kvm_vcpu_init(vcpu, kvm, id); |
| 1137 | if (err) |
| 1138 | goto free_vcpu; |
| 1139 | |
| 1140 | vcpu->arch.shared = &vcpu->arch.shregs; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1141 | vcpu->arch.mmcr[0] = MMCR0_FC; |
| 1142 | vcpu->arch.ctrl = CTRL_RUNLATCH; |
| 1143 | /* default to host PVR, since we can't spoof it */ |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 1144 | kvmppc_set_pvr_hv(vcpu, mfspr(SPRN_PVR)); |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 1145 | spin_lock_init(&vcpu->arch.vpa_update_lock); |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 1146 | spin_lock_init(&vcpu->arch.tbacct_lock); |
| 1147 | vcpu->arch.busy_preempt = TB_NIL; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1148 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1149 | kvmppc_mmu_book3s_hv_init(vcpu); |
| 1150 | |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 1151 | vcpu->arch.state = KVMPPC_VCPU_NOTREADY; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1152 | |
| 1153 | init_waitqueue_head(&vcpu->arch.cpu_run); |
| 1154 | |
| 1155 | mutex_lock(&kvm->lock); |
| 1156 | vcore = kvm->arch.vcores[core]; |
| 1157 | if (!vcore) { |
| 1158 | vcore = kzalloc(sizeof(struct kvmppc_vcore), GFP_KERNEL); |
| 1159 | if (vcore) { |
| 1160 | INIT_LIST_HEAD(&vcore->runnable_threads); |
| 1161 | spin_lock_init(&vcore->lock); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1162 | init_waitqueue_head(&vcore->wq); |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 1163 | vcore->preempt_tb = TB_NIL; |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 1164 | vcore->lpcr = kvm->arch.lpcr; |
Paul Mackerras | e0b7ec0 | 2014-01-08 21:25:20 +1100 | [diff] [blame] | 1165 | vcore->first_vcpuid = core * threads_per_core; |
| 1166 | vcore->kvm = kvm; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1167 | } |
| 1168 | kvm->arch.vcores[core] = vcore; |
Paul Mackerras | 1b400ba | 2012-11-21 23:28:08 +0000 | [diff] [blame] | 1169 | kvm->arch.online_vcores++; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1170 | } |
| 1171 | mutex_unlock(&kvm->lock); |
| 1172 | |
| 1173 | if (!vcore) |
| 1174 | goto free_vcpu; |
| 1175 | |
| 1176 | spin_lock(&vcore->lock); |
| 1177 | ++vcore->num_threads; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1178 | spin_unlock(&vcore->lock); |
| 1179 | vcpu->arch.vcore = vcore; |
Paul Mackerras | e0b7ec0 | 2014-01-08 21:25:20 +1100 | [diff] [blame] | 1180 | vcpu->arch.ptid = vcpu->vcpu_id - vcore->first_vcpuid; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1181 | |
Alexander Graf | af8f38b | 2011-08-10 13:57:08 +0200 | [diff] [blame] | 1182 | vcpu->arch.cpu_type = KVM_CPU_3S_64; |
| 1183 | kvmppc_sanity_check(vcpu); |
| 1184 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1185 | return vcpu; |
| 1186 | |
| 1187 | free_vcpu: |
Sasha Levin | 6b75e6b | 2011-12-07 10:24:56 +0200 | [diff] [blame] | 1188 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1189 | out: |
| 1190 | return ERR_PTR(err); |
| 1191 | } |
| 1192 | |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 1193 | static void unpin_vpa(struct kvm *kvm, struct kvmppc_vpa *vpa) |
| 1194 | { |
| 1195 | if (vpa->pinned_addr) |
| 1196 | kvmppc_unpin_guest_page(kvm, vpa->pinned_addr, vpa->gpa, |
| 1197 | vpa->dirty); |
| 1198 | } |
| 1199 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 1200 | static void kvmppc_core_vcpu_free_hv(struct kvm_vcpu *vcpu) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1201 | { |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 1202 | spin_lock(&vcpu->arch.vpa_update_lock); |
Paul Mackerras | c35635e | 2013-04-18 19:51:04 +0000 | [diff] [blame] | 1203 | unpin_vpa(vcpu->kvm, &vcpu->arch.dtl); |
| 1204 | unpin_vpa(vcpu->kvm, &vcpu->arch.slb_shadow); |
| 1205 | unpin_vpa(vcpu->kvm, &vcpu->arch.vpa); |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 1206 | spin_unlock(&vcpu->arch.vpa_update_lock); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1207 | kvm_vcpu_uninit(vcpu); |
Sasha Levin | 6b75e6b | 2011-12-07 10:24:56 +0200 | [diff] [blame] | 1208 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1209 | } |
| 1210 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 1211 | static int kvmppc_core_check_requests_hv(struct kvm_vcpu *vcpu) |
| 1212 | { |
| 1213 | /* Indicate we want to get back into the guest */ |
| 1214 | return 1; |
| 1215 | } |
| 1216 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1217 | static void kvmppc_set_timer(struct kvm_vcpu *vcpu) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1218 | { |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1219 | unsigned long dec_nsec, now; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1220 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1221 | now = get_tb(); |
| 1222 | if (now > vcpu->arch.dec_expires) { |
| 1223 | /* decrementer has already gone negative */ |
| 1224 | kvmppc_core_queue_dec(vcpu); |
Scott Wood | 7e28e60e | 2011-11-08 18:23:20 -0600 | [diff] [blame] | 1225 | kvmppc_core_prepare_to_enter(vcpu); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1226 | return; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1227 | } |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1228 | dec_nsec = (vcpu->arch.dec_expires - now) * NSEC_PER_SEC |
| 1229 | / tb_ticks_per_sec; |
| 1230 | hrtimer_start(&vcpu->arch.dec_timer, ktime_set(0, dec_nsec), |
| 1231 | HRTIMER_MODE_REL); |
| 1232 | vcpu->arch.timer_running = 1; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1233 | } |
| 1234 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1235 | static void kvmppc_end_cede(struct kvm_vcpu *vcpu) |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1236 | { |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1237 | vcpu->arch.ceded = 0; |
| 1238 | if (vcpu->arch.timer_running) { |
| 1239 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); |
| 1240 | vcpu->arch.timer_running = 0; |
| 1241 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1242 | } |
| 1243 | |
Paul Mackerras | e0b7ec0 | 2014-01-08 21:25:20 +1100 | [diff] [blame] | 1244 | extern void __kvmppc_vcore_entry(void); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1245 | |
| 1246 | static void kvmppc_remove_runnable(struct kvmppc_vcore *vc, |
| 1247 | struct kvm_vcpu *vcpu) |
| 1248 | { |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 1249 | u64 now; |
| 1250 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1251 | if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) |
| 1252 | return; |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 1253 | spin_lock(&vcpu->arch.tbacct_lock); |
| 1254 | now = mftb(); |
| 1255 | vcpu->arch.busy_stolen += vcore_stolen_time(vc, now) - |
| 1256 | vcpu->arch.stolen_logged; |
| 1257 | vcpu->arch.busy_preempt = now; |
| 1258 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; |
| 1259 | spin_unlock(&vcpu->arch.tbacct_lock); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1260 | --vc->n_runnable; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1261 | list_del(&vcpu->arch.run_list); |
| 1262 | } |
| 1263 | |
Paul Mackerras | f0888f7 | 2012-02-03 00:54:17 +0000 | [diff] [blame] | 1264 | static int kvmppc_grab_hwthread(int cpu) |
| 1265 | { |
| 1266 | struct paca_struct *tpaca; |
| 1267 | long timeout = 1000; |
| 1268 | |
| 1269 | tpaca = &paca[cpu]; |
| 1270 | |
| 1271 | /* Ensure the thread won't go into the kernel if it wakes */ |
| 1272 | tpaca->kvm_hstate.hwthread_req = 1; |
Paul Mackerras | 7b444c6 | 2012-10-15 01:16:14 +0000 | [diff] [blame] | 1273 | tpaca->kvm_hstate.kvm_vcpu = NULL; |
Paul Mackerras | f0888f7 | 2012-02-03 00:54:17 +0000 | [diff] [blame] | 1274 | |
| 1275 | /* |
| 1276 | * If the thread is already executing in the kernel (e.g. handling |
| 1277 | * a stray interrupt), wait for it to get back to nap mode. |
| 1278 | * The smp_mb() is to ensure that our setting of hwthread_req |
| 1279 | * is visible before we look at hwthread_state, so if this |
| 1280 | * races with the code at system_reset_pSeries and the thread |
| 1281 | * misses our setting of hwthread_req, we are sure to see its |
| 1282 | * setting of hwthread_state, and vice versa. |
| 1283 | */ |
| 1284 | smp_mb(); |
| 1285 | while (tpaca->kvm_hstate.hwthread_state == KVM_HWTHREAD_IN_KERNEL) { |
| 1286 | if (--timeout <= 0) { |
| 1287 | pr_err("KVM: couldn't grab cpu %d\n", cpu); |
| 1288 | return -EBUSY; |
| 1289 | } |
| 1290 | udelay(1); |
| 1291 | } |
| 1292 | return 0; |
| 1293 | } |
| 1294 | |
| 1295 | static void kvmppc_release_hwthread(int cpu) |
| 1296 | { |
| 1297 | struct paca_struct *tpaca; |
| 1298 | |
| 1299 | tpaca = &paca[cpu]; |
| 1300 | tpaca->kvm_hstate.hwthread_req = 0; |
| 1301 | tpaca->kvm_hstate.kvm_vcpu = NULL; |
| 1302 | } |
| 1303 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1304 | static void kvmppc_start_thread(struct kvm_vcpu *vcpu) |
| 1305 | { |
| 1306 | int cpu; |
| 1307 | struct paca_struct *tpaca; |
| 1308 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
| 1309 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1310 | if (vcpu->arch.timer_running) { |
| 1311 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); |
| 1312 | vcpu->arch.timer_running = 0; |
| 1313 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1314 | cpu = vc->pcpu + vcpu->arch.ptid; |
| 1315 | tpaca = &paca[cpu]; |
| 1316 | tpaca->kvm_hstate.kvm_vcpu = vcpu; |
| 1317 | tpaca->kvm_hstate.kvm_vcore = vc; |
Paul Mackerras | e0b7ec0 | 2014-01-08 21:25:20 +1100 | [diff] [blame] | 1318 | tpaca->kvm_hstate.ptid = vcpu->arch.ptid; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1319 | vcpu->cpu = vc->pcpu; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1320 | smp_wmb(); |
Michael Neuling | 251da03 | 2011-11-10 16:03:20 +0000 | [diff] [blame] | 1321 | #if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP) |
Paul Mackerras | e0b7ec0 | 2014-01-08 21:25:20 +1100 | [diff] [blame] | 1322 | if (cpu != smp_processor_id()) { |
Andreas Schwab | 48eaef0 | 2013-12-30 15:36:56 +0100 | [diff] [blame] | 1323 | #ifdef CONFIG_KVM_XICS |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1324 | xics_wake_cpu(cpu); |
Andreas Schwab | 48eaef0 | 2013-12-30 15:36:56 +0100 | [diff] [blame] | 1325 | #endif |
Paul Mackerras | e0b7ec0 | 2014-01-08 21:25:20 +1100 | [diff] [blame] | 1326 | if (vcpu->arch.ptid) |
| 1327 | ++vc->n_woken; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1328 | } |
| 1329 | #endif |
| 1330 | } |
| 1331 | |
| 1332 | static void kvmppc_wait_for_nap(struct kvmppc_vcore *vc) |
| 1333 | { |
| 1334 | int i; |
| 1335 | |
| 1336 | HMT_low(); |
| 1337 | i = 0; |
| 1338 | while (vc->nap_count < vc->n_woken) { |
| 1339 | if (++i >= 1000000) { |
| 1340 | pr_err("kvmppc_wait_for_nap timeout %d %d\n", |
| 1341 | vc->nap_count, vc->n_woken); |
| 1342 | break; |
| 1343 | } |
| 1344 | cpu_relax(); |
| 1345 | } |
| 1346 | HMT_medium(); |
| 1347 | } |
| 1348 | |
| 1349 | /* |
| 1350 | * 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] | 1351 | * this core are off-line. Then grab the threads so they can't |
| 1352 | * enter the kernel. |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1353 | */ |
| 1354 | static int on_primary_thread(void) |
| 1355 | { |
| 1356 | int cpu = smp_processor_id(); |
| 1357 | int thr = cpu_thread_in_core(cpu); |
| 1358 | |
| 1359 | if (thr) |
| 1360 | return 0; |
| 1361 | while (++thr < threads_per_core) |
| 1362 | if (cpu_online(cpu + thr)) |
| 1363 | return 0; |
Paul Mackerras | 7b444c6 | 2012-10-15 01:16:14 +0000 | [diff] [blame] | 1364 | |
| 1365 | /* Grab all hw threads so they can't go into the kernel */ |
| 1366 | for (thr = 1; thr < threads_per_core; ++thr) { |
| 1367 | if (kvmppc_grab_hwthread(cpu + thr)) { |
| 1368 | /* Couldn't grab one; let the others go */ |
| 1369 | do { |
| 1370 | kvmppc_release_hwthread(cpu + thr); |
| 1371 | } while (--thr > 0); |
| 1372 | return 0; |
| 1373 | } |
| 1374 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1375 | return 1; |
| 1376 | } |
| 1377 | |
| 1378 | /* |
| 1379 | * Run a set of guest threads on a physical core. |
| 1380 | * Called with vc->lock held. |
| 1381 | */ |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 1382 | static void kvmppc_run_core(struct kvmppc_vcore *vc) |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1383 | { |
Paul Mackerras | e0b7ec0 | 2014-01-08 21:25:20 +1100 | [diff] [blame] | 1384 | struct kvm_vcpu *vcpu, *vnext; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1385 | long ret; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1386 | u64 now; |
Paul Mackerras | e0b7ec0 | 2014-01-08 21:25:20 +1100 | [diff] [blame] | 1387 | int i, need_vpa_update; |
Paul Mackerras | 2c9097e | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 1388 | int srcu_idx; |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 1389 | struct kvm_vcpu *vcpus_to_update[threads_per_core]; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1390 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1391 | /* don't start if any threads have a signal pending */ |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 1392 | need_vpa_update = 0; |
| 1393 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1394 | if (signal_pending(vcpu->arch.run_task)) |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 1395 | return; |
| 1396 | if (vcpu->arch.vpa.update_pending || |
| 1397 | vcpu->arch.slb_shadow.update_pending || |
| 1398 | vcpu->arch.dtl.update_pending) |
| 1399 | vcpus_to_update[need_vpa_update++] = vcpu; |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 1400 | } |
| 1401 | |
| 1402 | /* |
| 1403 | * Initialize *vc, in particular vc->vcore_state, so we can |
| 1404 | * drop the vcore lock if necessary. |
| 1405 | */ |
| 1406 | vc->n_woken = 0; |
| 1407 | vc->nap_count = 0; |
| 1408 | vc->entry_exit_count = 0; |
Paul Mackerras | 2f12f03 | 2012-10-15 01:17:17 +0000 | [diff] [blame] | 1409 | vc->vcore_state = VCORE_STARTING; |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 1410 | vc->in_guest = 0; |
| 1411 | vc->napping_threads = 0; |
| 1412 | |
| 1413 | /* |
| 1414 | * Updating any of the vpas requires calling kvmppc_pin_guest_page, |
| 1415 | * which can't be called with any spinlocks held. |
| 1416 | */ |
| 1417 | if (need_vpa_update) { |
| 1418 | spin_unlock(&vc->lock); |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 1419 | for (i = 0; i < need_vpa_update; ++i) |
| 1420 | kvmppc_update_vpas(vcpus_to_update[i]); |
Paul Mackerras | 081f323 | 2012-06-01 20:20:24 +1000 | [diff] [blame] | 1421 | spin_lock(&vc->lock); |
| 1422 | } |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1423 | |
| 1424 | /* |
Paul Mackerras | 7b444c6 | 2012-10-15 01:16:14 +0000 | [diff] [blame] | 1425 | * Make sure we are running on thread 0, and that |
| 1426 | * secondary threads are offline. |
| 1427 | */ |
| 1428 | if (threads_per_core > 1 && !on_primary_thread()) { |
| 1429 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) |
| 1430 | vcpu->arch.ret = -EBUSY; |
| 1431 | goto out; |
| 1432 | } |
| 1433 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1434 | vc->pcpu = smp_processor_id(); |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 1435 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1436 | kvmppc_start_thread(vcpu); |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 1437 | kvmppc_create_dtl_entry(vcpu, vc); |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame] | 1438 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1439 | |
Paul Mackerras | e0b7ec0 | 2014-01-08 21:25:20 +1100 | [diff] [blame] | 1440 | /* Set this explicitly in case thread 0 doesn't have a vcpu */ |
| 1441 | get_paca()->kvm_hstate.kvm_vcore = vc; |
| 1442 | get_paca()->kvm_hstate.ptid = 0; |
| 1443 | |
Paul Mackerras | 2f12f03 | 2012-10-15 01:17:17 +0000 | [diff] [blame] | 1444 | vc->vcore_state = VCORE_RUNNING; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1445 | preempt_disable(); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1446 | spin_unlock(&vc->lock); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1447 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1448 | kvm_guest_enter(); |
Paul Mackerras | 2c9097e | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 1449 | |
Paul Mackerras | e0b7ec0 | 2014-01-08 21:25:20 +1100 | [diff] [blame] | 1450 | srcu_idx = srcu_read_lock(&vc->kvm->srcu); |
Paul Mackerras | 2c9097e | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 1451 | |
Paul Mackerras | e0b7ec0 | 2014-01-08 21:25:20 +1100 | [diff] [blame] | 1452 | __kvmppc_vcore_entry(); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1453 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1454 | spin_lock(&vc->lock); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1455 | /* disable sending of IPIs on virtual external irqs */ |
| 1456 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) |
| 1457 | vcpu->cpu = -1; |
| 1458 | /* wait for secondary threads to finish writing their state to memory */ |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1459 | if (vc->nap_count < vc->n_woken) |
| 1460 | kvmppc_wait_for_nap(vc); |
Paul Mackerras | 2f12f03 | 2012-10-15 01:17:17 +0000 | [diff] [blame] | 1461 | for (i = 0; i < threads_per_core; ++i) |
| 1462 | kvmppc_release_hwthread(vc->pcpu + i); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1463 | /* prevent other vcpu threads from doing kvmppc_start_thread() now */ |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1464 | vc->vcore_state = VCORE_EXITING; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1465 | spin_unlock(&vc->lock); |
| 1466 | |
Paul Mackerras | e0b7ec0 | 2014-01-08 21:25:20 +1100 | [diff] [blame] | 1467 | srcu_read_unlock(&vc->kvm->srcu, srcu_idx); |
Paul Mackerras | 2c9097e | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 1468 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1469 | /* make sure updates to secondary vcpu structs are visible now */ |
| 1470 | smp_mb(); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1471 | kvm_guest_exit(); |
| 1472 | |
| 1473 | preempt_enable(); |
| 1474 | kvm_resched(vcpu); |
| 1475 | |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 1476 | spin_lock(&vc->lock); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1477 | now = get_tb(); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1478 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { |
| 1479 | /* cancel pending dec exception if dec is positive */ |
| 1480 | if (now < vcpu->arch.dec_expires && |
| 1481 | kvmppc_core_pending_dec(vcpu)) |
| 1482 | kvmppc_core_dequeue_dec(vcpu); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1483 | |
| 1484 | ret = RESUME_GUEST; |
| 1485 | if (vcpu->arch.trap) |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 1486 | ret = kvmppc_handle_exit_hv(vcpu->arch.kvm_run, vcpu, |
| 1487 | vcpu->arch.run_task); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1488 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1489 | vcpu->arch.ret = ret; |
| 1490 | vcpu->arch.trap = 0; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1491 | |
| 1492 | if (vcpu->arch.ceded) { |
| 1493 | if (ret != RESUME_GUEST) |
| 1494 | kvmppc_end_cede(vcpu); |
| 1495 | else |
| 1496 | kvmppc_set_timer(vcpu); |
| 1497 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1498 | } |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1499 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1500 | out: |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1501 | vc->vcore_state = VCORE_INACTIVE; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1502 | list_for_each_entry_safe(vcpu, vnext, &vc->runnable_threads, |
| 1503 | arch.run_list) { |
| 1504 | if (vcpu->arch.ret != RESUME_GUEST) { |
| 1505 | kvmppc_remove_runnable(vc, vcpu); |
| 1506 | wake_up(&vcpu->arch.cpu_run); |
| 1507 | } |
| 1508 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1509 | } |
| 1510 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1511 | /* |
| 1512 | * Wait for some other vcpu thread to execute us, and |
| 1513 | * wake us up when we need to handle something in the host. |
| 1514 | */ |
| 1515 | static void kvmppc_wait_for_exec(struct kvm_vcpu *vcpu, int wait_state) |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1516 | { |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1517 | DEFINE_WAIT(wait); |
| 1518 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1519 | prepare_to_wait(&vcpu->arch.cpu_run, &wait, wait_state); |
| 1520 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) |
| 1521 | schedule(); |
| 1522 | finish_wait(&vcpu->arch.cpu_run, &wait); |
| 1523 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1524 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1525 | /* |
| 1526 | * All the vcpus in this vcore are idle, so wait for a decrementer |
| 1527 | * or external interrupt to one of the vcpus. vc->lock is held. |
| 1528 | */ |
| 1529 | static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc) |
| 1530 | { |
| 1531 | DEFINE_WAIT(wait); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1532 | |
| 1533 | prepare_to_wait(&vc->wq, &wait, TASK_INTERRUPTIBLE); |
| 1534 | vc->vcore_state = VCORE_SLEEPING; |
| 1535 | spin_unlock(&vc->lock); |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 1536 | schedule(); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1537 | finish_wait(&vc->wq, &wait); |
| 1538 | spin_lock(&vc->lock); |
| 1539 | vc->vcore_state = VCORE_INACTIVE; |
| 1540 | } |
| 1541 | |
| 1542 | static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) |
| 1543 | { |
| 1544 | int n_ceded; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1545 | struct kvmppc_vcore *vc; |
| 1546 | struct kvm_vcpu *v, *vn; |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 1547 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1548 | kvm_run->exit_reason = 0; |
| 1549 | vcpu->arch.ret = RESUME_GUEST; |
| 1550 | vcpu->arch.trap = 0; |
Paul Mackerras | 2f12f03 | 2012-10-15 01:17:17 +0000 | [diff] [blame] | 1551 | kvmppc_update_vpas(vcpu); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1552 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1553 | /* |
| 1554 | * Synchronize with other threads in this virtual core |
| 1555 | */ |
| 1556 | vc = vcpu->arch.vcore; |
| 1557 | spin_lock(&vc->lock); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1558 | vcpu->arch.ceded = 0; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1559 | vcpu->arch.run_task = current; |
| 1560 | vcpu->arch.kvm_run = kvm_run; |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 1561 | vcpu->arch.stolen_logged = vcore_stolen_time(vc, mftb()); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1562 | vcpu->arch.state = KVMPPC_VCPU_RUNNABLE; |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 1563 | vcpu->arch.busy_preempt = TB_NIL; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1564 | list_add_tail(&vcpu->arch.run_list, &vc->runnable_threads); |
| 1565 | ++vc->n_runnable; |
| 1566 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1567 | /* |
| 1568 | * This happens the first time this is called for a vcpu. |
| 1569 | * If the vcore is already running, we may be able to start |
| 1570 | * this thread straight away and have it join in. |
| 1571 | */ |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 1572 | if (!signal_pending(current)) { |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1573 | if (vc->vcore_state == VCORE_RUNNING && |
| 1574 | VCORE_EXIT_COUNT(vc) == 0) { |
Paul Mackerras | 2f12f03 | 2012-10-15 01:17:17 +0000 | [diff] [blame] | 1575 | kvmppc_create_dtl_entry(vcpu, vc); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1576 | kvmppc_start_thread(vcpu); |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 1577 | } else if (vc->vcore_state == VCORE_SLEEPING) { |
| 1578 | wake_up(&vc->wq); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1579 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1580 | |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 1581 | } |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1582 | |
| 1583 | while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && |
| 1584 | !signal_pending(current)) { |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 1585 | if (vc->vcore_state != VCORE_INACTIVE) { |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1586 | spin_unlock(&vc->lock); |
| 1587 | kvmppc_wait_for_exec(vcpu, TASK_INTERRUPTIBLE); |
| 1588 | spin_lock(&vc->lock); |
| 1589 | continue; |
| 1590 | } |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1591 | list_for_each_entry_safe(v, vn, &vc->runnable_threads, |
| 1592 | arch.run_list) { |
Scott Wood | 7e28e60e | 2011-11-08 18:23:20 -0600 | [diff] [blame] | 1593 | kvmppc_core_prepare_to_enter(v); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1594 | if (signal_pending(v->arch.run_task)) { |
| 1595 | kvmppc_remove_runnable(vc, v); |
| 1596 | v->stat.signal_exits++; |
| 1597 | v->arch.kvm_run->exit_reason = KVM_EXIT_INTR; |
| 1598 | v->arch.ret = -EINTR; |
| 1599 | wake_up(&v->arch.cpu_run); |
| 1600 | } |
| 1601 | } |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 1602 | if (!vc->n_runnable || vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) |
| 1603 | break; |
| 1604 | vc->runner = vcpu; |
| 1605 | n_ceded = 0; |
Paul Mackerras | 4619ac8 | 2013-04-17 20:31:41 +0000 | [diff] [blame] | 1606 | list_for_each_entry(v, &vc->runnable_threads, arch.run_list) { |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 1607 | if (!v->arch.pending_exceptions) |
| 1608 | n_ceded += v->arch.ceded; |
Paul Mackerras | 4619ac8 | 2013-04-17 20:31:41 +0000 | [diff] [blame] | 1609 | else |
| 1610 | v->arch.ceded = 0; |
| 1611 | } |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 1612 | if (n_ceded == vc->n_runnable) |
| 1613 | kvmppc_vcore_blocked(vc); |
| 1614 | else |
| 1615 | kvmppc_run_core(vc); |
Paul Mackerras | 0456ec4 | 2012-02-03 00:56:21 +0000 | [diff] [blame] | 1616 | vc->runner = NULL; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1617 | } |
| 1618 | |
Paul Mackerras | 8455d79 | 2012-10-15 01:17:42 +0000 | [diff] [blame] | 1619 | while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && |
| 1620 | (vc->vcore_state == VCORE_RUNNING || |
| 1621 | vc->vcore_state == VCORE_EXITING)) { |
| 1622 | spin_unlock(&vc->lock); |
| 1623 | kvmppc_wait_for_exec(vcpu, TASK_UNINTERRUPTIBLE); |
| 1624 | spin_lock(&vc->lock); |
| 1625 | } |
| 1626 | |
| 1627 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) { |
| 1628 | kvmppc_remove_runnable(vc, vcpu); |
| 1629 | vcpu->stat.signal_exits++; |
| 1630 | kvm_run->exit_reason = KVM_EXIT_INTR; |
| 1631 | vcpu->arch.ret = -EINTR; |
| 1632 | } |
| 1633 | |
| 1634 | if (vc->n_runnable && vc->vcore_state == VCORE_INACTIVE) { |
| 1635 | /* Wake up some vcpu to run the core */ |
| 1636 | v = list_first_entry(&vc->runnable_threads, |
| 1637 | struct kvm_vcpu, arch.run_list); |
| 1638 | wake_up(&v->arch.cpu_run); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1639 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1640 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1641 | spin_unlock(&vc->lock); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1642 | return vcpu->arch.ret; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1643 | } |
| 1644 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 1645 | 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] | 1646 | { |
| 1647 | int r; |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 1648 | int srcu_idx; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 1649 | |
Alexander Graf | af8f38b | 2011-08-10 13:57:08 +0200 | [diff] [blame] | 1650 | if (!vcpu->arch.sane) { |
| 1651 | run->exit_reason = KVM_EXIT_INTERNAL_ERROR; |
| 1652 | return -EINVAL; |
| 1653 | } |
| 1654 | |
Scott Wood | 25051b5 | 2011-11-08 18:23:23 -0600 | [diff] [blame] | 1655 | kvmppc_core_prepare_to_enter(vcpu); |
| 1656 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1657 | /* No need to go into the guest when all we'll do is come back out */ |
| 1658 | if (signal_pending(current)) { |
| 1659 | run->exit_reason = KVM_EXIT_INTR; |
| 1660 | return -EINTR; |
| 1661 | } |
| 1662 | |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 1663 | atomic_inc(&vcpu->kvm->arch.vcpus_running); |
| 1664 | /* Order vcpus_running vs. rma_setup_done, see kvmppc_alloc_reset_hpt */ |
| 1665 | smp_mb(); |
| 1666 | |
| 1667 | /* On the first time here, set up HTAB and VRMA or RMA */ |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1668 | if (!vcpu->kvm->arch.rma_setup_done) { |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 1669 | r = kvmppc_hv_setup_htab_rma(vcpu); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1670 | if (r) |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 1671 | goto out; |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1672 | } |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1673 | |
| 1674 | flush_fp_to_thread(current); |
| 1675 | flush_altivec_to_thread(current); |
| 1676 | flush_vsx_to_thread(current); |
| 1677 | vcpu->arch.wqp = &vcpu->arch.vcore->wq; |
Paul Mackerras | 342d3db | 2011-12-12 12:38:05 +0000 | [diff] [blame] | 1678 | vcpu->arch.pgdir = current->mm->pgd; |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 1679 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1680 | |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 1681 | do { |
| 1682 | r = kvmppc_run_vcpu(run, vcpu); |
| 1683 | |
| 1684 | if (run->exit_reason == KVM_EXIT_PAPR_HCALL && |
| 1685 | !(vcpu->arch.shregs.msr & MSR_PR)) { |
| 1686 | r = kvmppc_pseries_do_hcall(vcpu); |
Scott Wood | 7e28e60e | 2011-11-08 18:23:20 -0600 | [diff] [blame] | 1687 | kvmppc_core_prepare_to_enter(vcpu); |
Paul Mackerras | 913d3ff9a | 2012-10-15 01:16:48 +0000 | [diff] [blame] | 1688 | } else if (r == RESUME_PAGE_FAULT) { |
| 1689 | srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
| 1690 | r = kvmppc_book3s_hv_page_fault(run, vcpu, |
| 1691 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); |
| 1692 | srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 1693 | } |
| 1694 | } while (r == RESUME_GUEST); |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 1695 | |
| 1696 | out: |
Paul Mackerras | c7b6767 | 2012-10-15 01:18:07 +0000 | [diff] [blame] | 1697 | vcpu->arch.state = KVMPPC_VCPU_NOTREADY; |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 1698 | atomic_dec(&vcpu->kvm->arch.vcpus_running); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 1699 | return r; |
| 1700 | } |
| 1701 | |
David Gibson | 54738c0 | 2011-06-29 00:22:41 +0000 | [diff] [blame] | 1702 | |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1703 | /* Work out RMLS (real mode limit selector) field value for a given RMA size. |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 1704 | Assumes POWER7 or PPC970. */ |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1705 | static inline int lpcr_rmls(unsigned long rma_size) |
| 1706 | { |
| 1707 | switch (rma_size) { |
| 1708 | case 32ul << 20: /* 32 MB */ |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 1709 | if (cpu_has_feature(CPU_FTR_ARCH_206)) |
| 1710 | return 8; /* only supported on POWER7 */ |
| 1711 | return -1; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1712 | case 64ul << 20: /* 64 MB */ |
| 1713 | return 3; |
| 1714 | case 128ul << 20: /* 128 MB */ |
| 1715 | return 7; |
| 1716 | case 256ul << 20: /* 256 MB */ |
| 1717 | return 4; |
| 1718 | case 1ul << 30: /* 1 GB */ |
| 1719 | return 2; |
| 1720 | case 16ul << 30: /* 16 GB */ |
| 1721 | return 1; |
| 1722 | case 256ul << 30: /* 256 GB */ |
| 1723 | return 0; |
| 1724 | default: |
| 1725 | return -1; |
| 1726 | } |
| 1727 | } |
| 1728 | |
| 1729 | static int kvm_rma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
| 1730 | { |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1731 | struct page *page; |
Aneesh Kumar K.V | 6c45b81 | 2013-07-02 11:15:17 +0530 | [diff] [blame] | 1732 | struct kvm_rma_info *ri = vma->vm_file->private_data; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1733 | |
Aneesh Kumar K.V | 6c45b81 | 2013-07-02 11:15:17 +0530 | [diff] [blame] | 1734 | if (vmf->pgoff >= kvm_rma_pages) |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1735 | return VM_FAULT_SIGBUS; |
| 1736 | |
| 1737 | page = pfn_to_page(ri->base_pfn + vmf->pgoff); |
| 1738 | get_page(page); |
| 1739 | vmf->page = page; |
| 1740 | return 0; |
| 1741 | } |
| 1742 | |
| 1743 | static const struct vm_operations_struct kvm_rma_vm_ops = { |
| 1744 | .fault = kvm_rma_fault, |
| 1745 | }; |
| 1746 | |
| 1747 | static int kvm_rma_mmap(struct file *file, struct vm_area_struct *vma) |
| 1748 | { |
Konstantin Khlebnikov | 314e51b | 2012-10-08 16:29:02 -0700 | [diff] [blame] | 1749 | vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1750 | vma->vm_ops = &kvm_rma_vm_ops; |
| 1751 | return 0; |
| 1752 | } |
| 1753 | |
| 1754 | static int kvm_rma_release(struct inode *inode, struct file *filp) |
| 1755 | { |
Aneesh Kumar K.V | 6c45b81 | 2013-07-02 11:15:17 +0530 | [diff] [blame] | 1756 | struct kvm_rma_info *ri = filp->private_data; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1757 | |
| 1758 | kvm_release_rma(ri); |
| 1759 | return 0; |
| 1760 | } |
| 1761 | |
Al Viro | 75ef9de | 2013-04-04 19:09:41 -0400 | [diff] [blame] | 1762 | static const struct file_operations kvm_rma_fops = { |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1763 | .mmap = kvm_rma_mmap, |
| 1764 | .release = kvm_rma_release, |
| 1765 | }; |
| 1766 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 1767 | static long kvm_vm_ioctl_allocate_rma(struct kvm *kvm, |
| 1768 | struct kvm_allocate_rma *ret) |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1769 | { |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1770 | long fd; |
Aneesh Kumar K.V | 6c45b81 | 2013-07-02 11:15:17 +0530 | [diff] [blame] | 1771 | struct kvm_rma_info *ri; |
| 1772 | /* |
| 1773 | * Only do this on PPC970 in HV mode |
| 1774 | */ |
| 1775 | if (!cpu_has_feature(CPU_FTR_HVMODE) || |
| 1776 | !cpu_has_feature(CPU_FTR_ARCH_201)) |
| 1777 | return -EINVAL; |
| 1778 | |
| 1779 | if (!kvm_rma_pages) |
| 1780 | return -EINVAL; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1781 | |
| 1782 | ri = kvm_alloc_rma(); |
| 1783 | if (!ri) |
| 1784 | return -ENOMEM; |
| 1785 | |
Yann Droneaud | 2f84d5e | 2013-08-24 22:14:08 +0200 | [diff] [blame] | 1786 | fd = anon_inode_getfd("kvm-rma", &kvm_rma_fops, ri, O_RDWR | O_CLOEXEC); |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1787 | if (fd < 0) |
| 1788 | kvm_release_rma(ri); |
| 1789 | |
Aneesh Kumar K.V | 6c45b81 | 2013-07-02 11:15:17 +0530 | [diff] [blame] | 1790 | ret->rma_size = kvm_rma_pages << PAGE_SHIFT; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1791 | return fd; |
| 1792 | } |
| 1793 | |
Benjamin Herrenschmidt | 5b74716 | 2012-04-26 19:43:42 +0000 | [diff] [blame] | 1794 | static void kvmppc_add_seg_page_size(struct kvm_ppc_one_seg_page_size **sps, |
| 1795 | int linux_psize) |
| 1796 | { |
| 1797 | struct mmu_psize_def *def = &mmu_psize_defs[linux_psize]; |
| 1798 | |
| 1799 | if (!def->shift) |
| 1800 | return; |
| 1801 | (*sps)->page_shift = def->shift; |
| 1802 | (*sps)->slb_enc = def->sllp; |
| 1803 | (*sps)->enc[0].page_shift = def->shift; |
Aneesh Kumar K.V | b1022fb | 2013-04-28 09:37:35 +0000 | [diff] [blame] | 1804 | /* |
| 1805 | * Only return base page encoding. We don't want to return |
| 1806 | * all the supporting pte_enc, because our H_ENTER doesn't |
| 1807 | * support MPSS yet. Once they do, we can start passing all |
| 1808 | * support pte_enc here |
| 1809 | */ |
| 1810 | (*sps)->enc[0].pte_enc = def->penc[linux_psize]; |
Benjamin Herrenschmidt | 5b74716 | 2012-04-26 19:43:42 +0000 | [diff] [blame] | 1811 | (*sps)++; |
| 1812 | } |
| 1813 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 1814 | static int kvm_vm_ioctl_get_smmu_info_hv(struct kvm *kvm, |
| 1815 | struct kvm_ppc_smmu_info *info) |
Benjamin Herrenschmidt | 5b74716 | 2012-04-26 19:43:42 +0000 | [diff] [blame] | 1816 | { |
| 1817 | struct kvm_ppc_one_seg_page_size *sps; |
| 1818 | |
| 1819 | info->flags = KVM_PPC_PAGE_SIZES_REAL; |
| 1820 | if (mmu_has_feature(MMU_FTR_1T_SEGMENT)) |
| 1821 | info->flags |= KVM_PPC_1T_SEGMENTS; |
| 1822 | info->slb_size = mmu_slb_size; |
| 1823 | |
| 1824 | /* We only support these sizes for now, and no muti-size segments */ |
| 1825 | sps = &info->sps[0]; |
| 1826 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_4K); |
| 1827 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_64K); |
| 1828 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_16M); |
| 1829 | |
| 1830 | return 0; |
| 1831 | } |
| 1832 | |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 1833 | /* |
| 1834 | * Get (and clear) the dirty memory log for a memory slot. |
| 1835 | */ |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 1836 | static int kvm_vm_ioctl_get_dirty_log_hv(struct kvm *kvm, |
| 1837 | struct kvm_dirty_log *log) |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 1838 | { |
| 1839 | struct kvm_memory_slot *memslot; |
| 1840 | int r; |
| 1841 | unsigned long n; |
| 1842 | |
| 1843 | mutex_lock(&kvm->slots_lock); |
| 1844 | |
| 1845 | r = -EINVAL; |
Alex Williamson | bbacc0c | 2012-12-10 10:33:09 -0700 | [diff] [blame] | 1846 | if (log->slot >= KVM_USER_MEM_SLOTS) |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 1847 | goto out; |
| 1848 | |
| 1849 | memslot = id_to_memslot(kvm->memslots, log->slot); |
| 1850 | r = -ENOENT; |
| 1851 | if (!memslot->dirty_bitmap) |
| 1852 | goto out; |
| 1853 | |
| 1854 | n = kvm_dirty_bitmap_bytes(memslot); |
| 1855 | memset(memslot->dirty_bitmap, 0, n); |
| 1856 | |
Paul Mackerras | dfe49db | 2012-09-11 13:28:18 +0000 | [diff] [blame] | 1857 | r = kvmppc_hv_get_dirty_log(kvm, memslot, memslot->dirty_bitmap); |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 1858 | if (r) |
| 1859 | goto out; |
| 1860 | |
| 1861 | r = -EFAULT; |
| 1862 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) |
| 1863 | goto out; |
| 1864 | |
| 1865 | r = 0; |
| 1866 | out: |
| 1867 | mutex_unlock(&kvm->slots_lock); |
| 1868 | return r; |
| 1869 | } |
| 1870 | |
Paul Mackerras | a66b48c | 2012-09-11 13:27:46 +0000 | [diff] [blame] | 1871 | static void unpin_slot(struct kvm_memory_slot *memslot) |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1872 | { |
| 1873 | unsigned long *physp; |
| 1874 | unsigned long j, npages, pfn; |
| 1875 | struct page *page; |
| 1876 | |
Paul Mackerras | a66b48c | 2012-09-11 13:27:46 +0000 | [diff] [blame] | 1877 | physp = memslot->arch.slot_phys; |
| 1878 | npages = memslot->npages; |
| 1879 | if (!physp) |
| 1880 | return; |
| 1881 | for (j = 0; j < npages; j++) { |
| 1882 | if (!(physp[j] & KVMPPC_GOT_PAGE)) |
| 1883 | continue; |
| 1884 | pfn = physp[j] >> PAGE_SHIFT; |
| 1885 | page = pfn_to_page(pfn); |
| 1886 | SetPageDirty(page); |
| 1887 | put_page(page); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1888 | } |
| 1889 | } |
| 1890 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 1891 | static void kvmppc_core_free_memslot_hv(struct kvm_memory_slot *free, |
| 1892 | struct kvm_memory_slot *dont) |
Paul Mackerras | a66b48c | 2012-09-11 13:27:46 +0000 | [diff] [blame] | 1893 | { |
| 1894 | if (!dont || free->arch.rmap != dont->arch.rmap) { |
| 1895 | vfree(free->arch.rmap); |
| 1896 | free->arch.rmap = NULL; |
| 1897 | } |
| 1898 | if (!dont || free->arch.slot_phys != dont->arch.slot_phys) { |
| 1899 | unpin_slot(free); |
| 1900 | vfree(free->arch.slot_phys); |
| 1901 | free->arch.slot_phys = NULL; |
| 1902 | } |
| 1903 | } |
| 1904 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 1905 | static int kvmppc_core_create_memslot_hv(struct kvm_memory_slot *slot, |
| 1906 | unsigned long npages) |
Paul Mackerras | a66b48c | 2012-09-11 13:27:46 +0000 | [diff] [blame] | 1907 | { |
| 1908 | slot->arch.rmap = vzalloc(npages * sizeof(*slot->arch.rmap)); |
| 1909 | if (!slot->arch.rmap) |
| 1910 | return -ENOMEM; |
| 1911 | slot->arch.slot_phys = NULL; |
| 1912 | |
| 1913 | return 0; |
| 1914 | } |
| 1915 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 1916 | static int kvmppc_core_prepare_memory_region_hv(struct kvm *kvm, |
| 1917 | struct kvm_memory_slot *memslot, |
| 1918 | struct kvm_userspace_memory_region *mem) |
Paul Mackerras | a66b48c | 2012-09-11 13:27:46 +0000 | [diff] [blame] | 1919 | { |
| 1920 | unsigned long *phys; |
| 1921 | |
| 1922 | /* Allocate a slot_phys array if needed */ |
| 1923 | phys = memslot->arch.slot_phys; |
| 1924 | if (!kvm->arch.using_mmu_notifiers && !phys && memslot->npages) { |
| 1925 | phys = vzalloc(memslot->npages * sizeof(unsigned long)); |
| 1926 | if (!phys) |
| 1927 | return -ENOMEM; |
| 1928 | memslot->arch.slot_phys = phys; |
| 1929 | } |
| 1930 | |
| 1931 | return 0; |
| 1932 | } |
| 1933 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 1934 | static void kvmppc_core_commit_memory_region_hv(struct kvm *kvm, |
| 1935 | struct kvm_userspace_memory_region *mem, |
| 1936 | const struct kvm_memory_slot *old) |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1937 | { |
Paul Mackerras | dfe49db | 2012-09-11 13:28:18 +0000 | [diff] [blame] | 1938 | unsigned long npages = mem->memory_size >> PAGE_SHIFT; |
| 1939 | struct kvm_memory_slot *memslot; |
| 1940 | |
Takuya Yoshikawa | 8482644 | 2013-02-27 19:45:25 +0900 | [diff] [blame] | 1941 | if (npages && old->npages) { |
Paul Mackerras | dfe49db | 2012-09-11 13:28:18 +0000 | [diff] [blame] | 1942 | /* |
| 1943 | * If modifying a memslot, reset all the rmap dirty bits. |
| 1944 | * If this is a new memslot, we don't need to do anything |
| 1945 | * since the rmap array starts out as all zeroes, |
| 1946 | * i.e. no pages are dirty. |
| 1947 | */ |
| 1948 | memslot = id_to_memslot(kvm->memslots, mem->slot); |
| 1949 | kvmppc_hv_get_dirty_log(kvm, memslot, NULL); |
| 1950 | } |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1951 | } |
| 1952 | |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 1953 | /* |
| 1954 | * Update LPCR values in kvm->arch and in vcores. |
| 1955 | * Caller must hold kvm->lock. |
| 1956 | */ |
| 1957 | void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr, unsigned long mask) |
| 1958 | { |
| 1959 | long int i; |
| 1960 | u32 cores_done = 0; |
| 1961 | |
| 1962 | if ((kvm->arch.lpcr & mask) == lpcr) |
| 1963 | return; |
| 1964 | |
| 1965 | kvm->arch.lpcr = (kvm->arch.lpcr & ~mask) | lpcr; |
| 1966 | |
| 1967 | for (i = 0; i < KVM_MAX_VCORES; ++i) { |
| 1968 | struct kvmppc_vcore *vc = kvm->arch.vcores[i]; |
| 1969 | if (!vc) |
| 1970 | continue; |
| 1971 | spin_lock(&vc->lock); |
| 1972 | vc->lpcr = (vc->lpcr & ~mask) | lpcr; |
| 1973 | spin_unlock(&vc->lock); |
| 1974 | if (++cores_done >= kvm->arch.online_vcores) |
| 1975 | break; |
| 1976 | } |
| 1977 | } |
| 1978 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 1979 | static void kvmppc_mmu_destroy_hv(struct kvm_vcpu *vcpu) |
| 1980 | { |
| 1981 | return; |
| 1982 | } |
| 1983 | |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 1984 | static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu) |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1985 | { |
| 1986 | int err = 0; |
| 1987 | struct kvm *kvm = vcpu->kvm; |
Aneesh Kumar K.V | 6c45b81 | 2013-07-02 11:15:17 +0530 | [diff] [blame] | 1988 | struct kvm_rma_info *ri = NULL; |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1989 | unsigned long hva; |
| 1990 | struct kvm_memory_slot *memslot; |
| 1991 | struct vm_area_struct *vma; |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 1992 | unsigned long lpcr = 0, senc; |
| 1993 | unsigned long lpcr_mask = 0; |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1994 | unsigned long psize, porder; |
| 1995 | unsigned long rma_size; |
| 1996 | unsigned long rmls; |
| 1997 | unsigned long *physp; |
Paul Mackerras | da9d1d7 | 2011-12-12 12:31:41 +0000 | [diff] [blame] | 1998 | unsigned long i, npages; |
Paul Mackerras | 2c9097e | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 1999 | int srcu_idx; |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 2000 | |
| 2001 | mutex_lock(&kvm->lock); |
| 2002 | if (kvm->arch.rma_setup_done) |
| 2003 | goto out; /* another vcpu beat us to it */ |
| 2004 | |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 2005 | /* Allocate hashed page table (if not done already) and reset it */ |
| 2006 | if (!kvm->arch.hpt_virt) { |
| 2007 | err = kvmppc_alloc_hpt(kvm, NULL); |
| 2008 | if (err) { |
| 2009 | pr_err("KVM: Couldn't alloc HPT\n"); |
| 2010 | goto out; |
| 2011 | } |
| 2012 | } |
| 2013 | |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 2014 | /* Look up the memslot for guest physical address 0 */ |
Paul Mackerras | 2c9097e | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 2015 | srcu_idx = srcu_read_lock(&kvm->srcu); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 2016 | memslot = gfn_to_memslot(kvm, 0); |
| 2017 | |
| 2018 | /* We must have some memory at 0 by now */ |
| 2019 | err = -EINVAL; |
| 2020 | if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) |
Paul Mackerras | 2c9097e | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 2021 | goto out_srcu; |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 2022 | |
| 2023 | /* Look up the VMA for the start of this memory slot */ |
| 2024 | hva = memslot->userspace_addr; |
| 2025 | down_read(¤t->mm->mmap_sem); |
| 2026 | vma = find_vma(current->mm, hva); |
| 2027 | if (!vma || vma->vm_start > hva || (vma->vm_flags & VM_IO)) |
| 2028 | goto up_out; |
| 2029 | |
| 2030 | psize = vma_kernel_pagesize(vma); |
Paul Mackerras | da9d1d7 | 2011-12-12 12:31:41 +0000 | [diff] [blame] | 2031 | porder = __ilog2(psize); |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 2032 | |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 2033 | /* Is this one of our preallocated RMAs? */ |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 2034 | if (vma->vm_file && vma->vm_file->f_op == &kvm_rma_fops && |
| 2035 | hva == vma->vm_start) |
| 2036 | ri = vma->vm_file->private_data; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 2037 | |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 2038 | up_read(¤t->mm->mmap_sem); |
| 2039 | |
| 2040 | if (!ri) { |
| 2041 | /* On POWER7, use VRMA; on PPC970, give up */ |
| 2042 | err = -EPERM; |
| 2043 | if (cpu_has_feature(CPU_FTR_ARCH_201)) { |
| 2044 | pr_err("KVM: CPU requires an RMO\n"); |
Paul Mackerras | 2c9097e | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 2045 | goto out_srcu; |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 2046 | } |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 2047 | |
Paul Mackerras | da9d1d7 | 2011-12-12 12:31:41 +0000 | [diff] [blame] | 2048 | /* We can handle 4k, 64k or 16M pages in the VRMA */ |
| 2049 | err = -EINVAL; |
| 2050 | if (!(psize == 0x1000 || psize == 0x10000 || |
| 2051 | psize == 0x1000000)) |
Paul Mackerras | 2c9097e | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 2052 | goto out_srcu; |
Paul Mackerras | da9d1d7 | 2011-12-12 12:31:41 +0000 | [diff] [blame] | 2053 | |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 2054 | /* Update VRMASD field in the LPCR */ |
Paul Mackerras | da9d1d7 | 2011-12-12 12:31:41 +0000 | [diff] [blame] | 2055 | senc = slb_pgsize_encoding(psize); |
Paul Mackerras | 697d389 | 2011-12-12 12:36:37 +0000 | [diff] [blame] | 2056 | kvm->arch.vrma_slb_v = senc | SLB_VSID_B_1T | |
| 2057 | (VRMA_VSID << SLB_VSID_SHIFT_1T); |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 2058 | lpcr_mask = LPCR_VRMASD; |
| 2059 | /* the -4 is to account for senc values starting at 0x10 */ |
| 2060 | lpcr = senc << (LPCR_VRMASD_SH - 4); |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 2061 | |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 2062 | /* Create HPTEs in the hash page table for the VRMA */ |
Paul Mackerras | da9d1d7 | 2011-12-12 12:31:41 +0000 | [diff] [blame] | 2063 | kvmppc_map_vrma(vcpu, memslot, porder); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 2064 | |
| 2065 | } else { |
| 2066 | /* Set up to use an RMO region */ |
Aneesh Kumar K.V | 6c45b81 | 2013-07-02 11:15:17 +0530 | [diff] [blame] | 2067 | rma_size = kvm_rma_pages; |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 2068 | if (rma_size > memslot->npages) |
| 2069 | rma_size = memslot->npages; |
| 2070 | rma_size <<= PAGE_SHIFT; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 2071 | rmls = lpcr_rmls(rma_size); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 2072 | err = -EINVAL; |
Chen Gang | 5d226ae | 2013-07-22 14:32:35 +0800 | [diff] [blame] | 2073 | if ((long)rmls < 0) { |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 2074 | pr_err("KVM: Can't use RMA of 0x%lx bytes\n", rma_size); |
Paul Mackerras | 2c9097e | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 2075 | goto out_srcu; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 2076 | } |
| 2077 | atomic_inc(&ri->use_count); |
| 2078 | kvm->arch.rma = ri; |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 2079 | |
| 2080 | /* Update LPCR and RMOR */ |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 2081 | if (cpu_has_feature(CPU_FTR_ARCH_201)) { |
| 2082 | /* PPC970; insert RMLS value (split field) in HID4 */ |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 2083 | lpcr_mask = (1ul << HID4_RMLS0_SH) | |
| 2084 | (3ul << HID4_RMLS2_SH) | HID4_RMOR; |
| 2085 | lpcr = ((rmls >> 2) << HID4_RMLS0_SH) | |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 2086 | ((rmls & 3) << HID4_RMLS2_SH); |
| 2087 | /* RMOR is also in HID4 */ |
| 2088 | lpcr |= ((ri->base_pfn >> (26 - PAGE_SHIFT)) & 0xffff) |
| 2089 | << HID4_RMOR_SH; |
| 2090 | } else { |
| 2091 | /* POWER7 */ |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 2092 | lpcr_mask = LPCR_VPM0 | LPCR_VRMA_L | LPCR_RMLS; |
| 2093 | lpcr = rmls << LPCR_RMLS_SH; |
Aneesh Kumar K.V | 6c45b81 | 2013-07-02 11:15:17 +0530 | [diff] [blame] | 2094 | kvm->arch.rmor = ri->base_pfn << PAGE_SHIFT; |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 2095 | } |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 2096 | pr_info("KVM: Using RMO at %lx size %lx (LPCR = %lx)\n", |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 2097 | ri->base_pfn << PAGE_SHIFT, rma_size, lpcr); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 2098 | |
| 2099 | /* Initialize phys addrs of pages in RMO */ |
Aneesh Kumar K.V | 6c45b81 | 2013-07-02 11:15:17 +0530 | [diff] [blame] | 2100 | npages = kvm_rma_pages; |
Paul Mackerras | da9d1d7 | 2011-12-12 12:31:41 +0000 | [diff] [blame] | 2101 | porder = __ilog2(npages); |
Paul Mackerras | a66b48c | 2012-09-11 13:27:46 +0000 | [diff] [blame] | 2102 | physp = memslot->arch.slot_phys; |
| 2103 | if (physp) { |
| 2104 | if (npages > memslot->npages) |
| 2105 | npages = memslot->npages; |
| 2106 | spin_lock(&kvm->arch.slot_phys_lock); |
| 2107 | for (i = 0; i < npages; ++i) |
| 2108 | physp[i] = ((ri->base_pfn + i) << PAGE_SHIFT) + |
| 2109 | porder; |
| 2110 | spin_unlock(&kvm->arch.slot_phys_lock); |
| 2111 | } |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 2112 | } |
| 2113 | |
Paul Mackerras | a0144e2 | 2013-09-20 14:52:38 +1000 | [diff] [blame] | 2114 | kvmppc_update_lpcr(kvm, lpcr, lpcr_mask); |
| 2115 | |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 2116 | /* Order updates to kvm->arch.lpcr etc. vs. rma_setup_done */ |
| 2117 | smp_wmb(); |
| 2118 | kvm->arch.rma_setup_done = 1; |
| 2119 | err = 0; |
Paul Mackerras | 2c9097e | 2012-09-11 13:27:01 +0000 | [diff] [blame] | 2120 | out_srcu: |
| 2121 | srcu_read_unlock(&kvm->srcu, srcu_idx); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 2122 | out: |
| 2123 | mutex_unlock(&kvm->lock); |
| 2124 | return err; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 2125 | |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 2126 | up_out: |
| 2127 | up_read(¤t->mm->mmap_sem); |
Lai Jiangshan | 505d642 | 2013-03-16 00:50:49 +0800 | [diff] [blame] | 2128 | goto out_srcu; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2129 | } |
| 2130 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 2131 | static int kvmppc_core_init_vm_hv(struct kvm *kvm) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2132 | { |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 2133 | unsigned long lpcr, lpid; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2134 | |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 2135 | /* Allocate the guest's logical partition ID */ |
| 2136 | |
| 2137 | lpid = kvmppc_alloc_lpid(); |
Chen Gang | 5d226ae | 2013-07-22 14:32:35 +0800 | [diff] [blame] | 2138 | if ((long)lpid < 0) |
Paul Mackerras | 32fad28 | 2012-05-04 02:32:53 +0000 | [diff] [blame] | 2139 | return -ENOMEM; |
| 2140 | kvm->arch.lpid = lpid; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2141 | |
Paul Mackerras | 1b400ba | 2012-11-21 23:28:08 +0000 | [diff] [blame] | 2142 | /* |
| 2143 | * Since we don't flush the TLB when tearing down a VM, |
| 2144 | * and this lpid might have previously been used, |
| 2145 | * make sure we flush on each core before running the new VM. |
| 2146 | */ |
| 2147 | cpumask_setall(&kvm->arch.need_tlb_flush); |
| 2148 | |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 2149 | kvm->arch.rma = NULL; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 2150 | |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 2151 | kvm->arch.host_sdr1 = mfspr(SPRN_SDR1); |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 2152 | |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 2153 | if (cpu_has_feature(CPU_FTR_ARCH_201)) { |
| 2154 | /* PPC970; HID4 is effectively the LPCR */ |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 2155 | kvm->arch.host_lpid = 0; |
| 2156 | kvm->arch.host_lpcr = lpcr = mfspr(SPRN_HID4); |
| 2157 | lpcr &= ~((3 << HID4_LPID1_SH) | (0xful << HID4_LPID5_SH)); |
| 2158 | lpcr |= ((lpid >> 4) << HID4_LPID1_SH) | |
| 2159 | ((lpid & 0xf) << HID4_LPID5_SH); |
| 2160 | } else { |
| 2161 | /* POWER7; init LPCR for virtual RMA mode */ |
| 2162 | kvm->arch.host_lpid = mfspr(SPRN_LPID); |
| 2163 | kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR); |
| 2164 | lpcr &= LPCR_PECE | LPCR_LPES; |
| 2165 | lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE | |
Paul Mackerras | 697d389 | 2011-12-12 12:36:37 +0000 | [diff] [blame] | 2166 | LPCR_VPM0 | LPCR_VPM1; |
| 2167 | kvm->arch.vrma_slb_v = SLB_VSID_B_1T | |
| 2168 | (VRMA_VSID << SLB_VSID_SHIFT_1T); |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 2169 | } |
| 2170 | kvm->arch.lpcr = lpcr; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 2171 | |
Paul Mackerras | 342d3db | 2011-12-12 12:38:05 +0000 | [diff] [blame] | 2172 | kvm->arch.using_mmu_notifiers = !!cpu_has_feature(CPU_FTR_ARCH_206); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 2173 | spin_lock_init(&kvm->arch.slot_phys_lock); |
Paul Mackerras | 512691d | 2012-10-15 01:15:41 +0000 | [diff] [blame] | 2174 | |
| 2175 | /* |
| 2176 | * Don't allow secondary CPU threads to come online |
| 2177 | * while any KVM VMs exist. |
| 2178 | */ |
| 2179 | inhibit_secondary_onlining(); |
| 2180 | |
David Gibson | 54738c0 | 2011-06-29 00:22:41 +0000 | [diff] [blame] | 2181 | return 0; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2182 | } |
| 2183 | |
Paul Mackerras | f1378b1 | 2013-09-27 15:33:43 +0530 | [diff] [blame] | 2184 | static void kvmppc_free_vcores(struct kvm *kvm) |
| 2185 | { |
| 2186 | long int i; |
| 2187 | |
| 2188 | for (i = 0; i < KVM_MAX_VCORES; ++i) |
| 2189 | kfree(kvm->arch.vcores[i]); |
| 2190 | kvm->arch.online_vcores = 0; |
| 2191 | } |
| 2192 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 2193 | static void kvmppc_core_destroy_vm_hv(struct kvm *kvm) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2194 | { |
Paul Mackerras | 512691d | 2012-10-15 01:15:41 +0000 | [diff] [blame] | 2195 | uninhibit_secondary_onlining(); |
| 2196 | |
Paul Mackerras | f1378b1 | 2013-09-27 15:33:43 +0530 | [diff] [blame] | 2197 | kvmppc_free_vcores(kvm); |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 2198 | if (kvm->arch.rma) { |
| 2199 | kvm_release_rma(kvm->arch.rma); |
| 2200 | kvm->arch.rma = NULL; |
| 2201 | } |
| 2202 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2203 | kvmppc_free_hpt(kvm); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2204 | } |
| 2205 | |
| 2206 | /* 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] | 2207 | static int kvmppc_core_emulate_op_hv(struct kvm_run *run, struct kvm_vcpu *vcpu, |
| 2208 | unsigned int inst, int *advance) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2209 | { |
| 2210 | return EMULATE_FAIL; |
| 2211 | } |
| 2212 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 2213 | static int kvmppc_core_emulate_mtspr_hv(struct kvm_vcpu *vcpu, int sprn, |
| 2214 | ulong spr_val) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2215 | { |
| 2216 | return EMULATE_FAIL; |
| 2217 | } |
| 2218 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 2219 | static int kvmppc_core_emulate_mfspr_hv(struct kvm_vcpu *vcpu, int sprn, |
| 2220 | ulong *spr_val) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2221 | { |
| 2222 | return EMULATE_FAIL; |
| 2223 | } |
| 2224 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 2225 | static int kvmppc_core_check_processor_compat_hv(void) |
| 2226 | { |
| 2227 | if (!cpu_has_feature(CPU_FTR_HVMODE)) |
| 2228 | return -EIO; |
| 2229 | return 0; |
| 2230 | } |
| 2231 | |
| 2232 | static long kvm_arch_vm_ioctl_hv(struct file *filp, |
| 2233 | unsigned int ioctl, unsigned long arg) |
| 2234 | { |
| 2235 | struct kvm *kvm __maybe_unused = filp->private_data; |
| 2236 | void __user *argp = (void __user *)arg; |
| 2237 | long r; |
| 2238 | |
| 2239 | switch (ioctl) { |
| 2240 | |
| 2241 | case KVM_ALLOCATE_RMA: { |
| 2242 | struct kvm_allocate_rma rma; |
| 2243 | struct kvm *kvm = filp->private_data; |
| 2244 | |
| 2245 | r = kvm_vm_ioctl_allocate_rma(kvm, &rma); |
| 2246 | if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma))) |
| 2247 | r = -EFAULT; |
| 2248 | break; |
| 2249 | } |
| 2250 | |
| 2251 | case KVM_PPC_ALLOCATE_HTAB: { |
| 2252 | u32 htab_order; |
| 2253 | |
| 2254 | r = -EFAULT; |
| 2255 | if (get_user(htab_order, (u32 __user *)argp)) |
| 2256 | break; |
| 2257 | r = kvmppc_alloc_reset_hpt(kvm, &htab_order); |
| 2258 | if (r) |
| 2259 | break; |
| 2260 | r = -EFAULT; |
| 2261 | if (put_user(htab_order, (u32 __user *)argp)) |
| 2262 | break; |
| 2263 | r = 0; |
| 2264 | break; |
| 2265 | } |
| 2266 | |
| 2267 | case KVM_PPC_GET_HTAB_FD: { |
| 2268 | struct kvm_get_htab_fd ghf; |
| 2269 | |
| 2270 | r = -EFAULT; |
| 2271 | if (copy_from_user(&ghf, argp, sizeof(ghf))) |
| 2272 | break; |
| 2273 | r = kvm_vm_ioctl_get_htab_fd(kvm, &ghf); |
| 2274 | break; |
| 2275 | } |
| 2276 | |
| 2277 | default: |
| 2278 | r = -ENOTTY; |
| 2279 | } |
| 2280 | |
| 2281 | return r; |
| 2282 | } |
| 2283 | |
Aneesh Kumar K.V | cbbc58d | 2013-10-07 22:18:01 +0530 | [diff] [blame] | 2284 | static struct kvmppc_ops kvm_ops_hv = { |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 2285 | .get_sregs = kvm_arch_vcpu_ioctl_get_sregs_hv, |
| 2286 | .set_sregs = kvm_arch_vcpu_ioctl_set_sregs_hv, |
| 2287 | .get_one_reg = kvmppc_get_one_reg_hv, |
| 2288 | .set_one_reg = kvmppc_set_one_reg_hv, |
| 2289 | .vcpu_load = kvmppc_core_vcpu_load_hv, |
| 2290 | .vcpu_put = kvmppc_core_vcpu_put_hv, |
| 2291 | .set_msr = kvmppc_set_msr_hv, |
| 2292 | .vcpu_run = kvmppc_vcpu_run_hv, |
| 2293 | .vcpu_create = kvmppc_core_vcpu_create_hv, |
| 2294 | .vcpu_free = kvmppc_core_vcpu_free_hv, |
| 2295 | .check_requests = kvmppc_core_check_requests_hv, |
| 2296 | .get_dirty_log = kvm_vm_ioctl_get_dirty_log_hv, |
| 2297 | .flush_memslot = kvmppc_core_flush_memslot_hv, |
| 2298 | .prepare_memory_region = kvmppc_core_prepare_memory_region_hv, |
| 2299 | .commit_memory_region = kvmppc_core_commit_memory_region_hv, |
| 2300 | .unmap_hva = kvm_unmap_hva_hv, |
| 2301 | .unmap_hva_range = kvm_unmap_hva_range_hv, |
| 2302 | .age_hva = kvm_age_hva_hv, |
| 2303 | .test_age_hva = kvm_test_age_hva_hv, |
| 2304 | .set_spte_hva = kvm_set_spte_hva_hv, |
| 2305 | .mmu_destroy = kvmppc_mmu_destroy_hv, |
| 2306 | .free_memslot = kvmppc_core_free_memslot_hv, |
| 2307 | .create_memslot = kvmppc_core_create_memslot_hv, |
| 2308 | .init_vm = kvmppc_core_init_vm_hv, |
| 2309 | .destroy_vm = kvmppc_core_destroy_vm_hv, |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 2310 | .get_smmu_info = kvm_vm_ioctl_get_smmu_info_hv, |
| 2311 | .emulate_op = kvmppc_core_emulate_op_hv, |
| 2312 | .emulate_mtspr = kvmppc_core_emulate_mtspr_hv, |
| 2313 | .emulate_mfspr = kvmppc_core_emulate_mfspr_hv, |
| 2314 | .fast_vcpu_kick = kvmppc_fast_vcpu_kick_hv, |
| 2315 | .arch_vm_ioctl = kvm_arch_vm_ioctl_hv, |
| 2316 | }; |
| 2317 | |
| 2318 | static int kvmppc_book3s_init_hv(void) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2319 | { |
| 2320 | int r; |
Aneesh Kumar K.V | cbbc58d | 2013-10-07 22:18:01 +0530 | [diff] [blame] | 2321 | /* |
| 2322 | * FIXME!! Do we need to check on all cpus ? |
| 2323 | */ |
| 2324 | r = kvmppc_core_check_processor_compat_hv(); |
| 2325 | if (r < 0) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2326 | return r; |
| 2327 | |
Aneesh Kumar K.V | cbbc58d | 2013-10-07 22:18:01 +0530 | [diff] [blame] | 2328 | kvm_ops_hv.owner = THIS_MODULE; |
| 2329 | kvmppc_hv_ops = &kvm_ops_hv; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2330 | |
Aneesh Kumar K.V | cbbc58d | 2013-10-07 22:18:01 +0530 | [diff] [blame] | 2331 | r = kvmppc_mmu_hv_init(); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2332 | return r; |
| 2333 | } |
| 2334 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 2335 | static void kvmppc_book3s_exit_hv(void) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2336 | { |
Aneesh Kumar K.V | cbbc58d | 2013-10-07 22:18:01 +0530 | [diff] [blame] | 2337 | kvmppc_hv_ops = NULL; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 2338 | } |
| 2339 | |
Aneesh Kumar K.V | 3a167bea | 2013-10-07 22:17:53 +0530 | [diff] [blame] | 2340 | module_init(kvmppc_book3s_init_hv); |
| 2341 | module_exit(kvmppc_book3s_exit_hv); |
Aneesh Kumar K.V | 2ba9f0d | 2013-10-07 22:17:59 +0530 | [diff] [blame] | 2342 | MODULE_LICENSE("GPL"); |
Alexander Graf | 398a76c | 2013-12-09 13:53:42 +0100 | [diff] [blame] | 2343 | MODULE_ALIAS_MISCDEV(KVM_MINOR); |
| 2344 | MODULE_ALIAS("devname:kvm"); |