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 | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 33 | |
| 34 | #include <asm/reg.h> |
| 35 | #include <asm/cputable.h> |
| 36 | #include <asm/cacheflush.h> |
| 37 | #include <asm/tlbflush.h> |
| 38 | #include <asm/uaccess.h> |
| 39 | #include <asm/io.h> |
| 40 | #include <asm/kvm_ppc.h> |
| 41 | #include <asm/kvm_book3s.h> |
| 42 | #include <asm/mmu_context.h> |
| 43 | #include <asm/lppaca.h> |
| 44 | #include <asm/processor.h> |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 45 | #include <asm/cputhreads.h> |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 46 | #include <asm/page.h> |
Michael Neuling | de1d924 | 2011-11-09 20:39:49 +0000 | [diff] [blame] | 47 | #include <asm/hvcall.h> |
David Howells | ae3a197 | 2012-03-28 18:30:02 +0100 | [diff] [blame] | 48 | #include <asm/switch_to.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 49 | #include <linux/gfp.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 50 | #include <linux/vmalloc.h> |
| 51 | #include <linux/highmem.h> |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 52 | #include <linux/hugetlb.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 53 | |
| 54 | /* #define EXIT_DEBUG */ |
| 55 | /* #define EXIT_DEBUG_SIMPLE */ |
| 56 | /* #define EXIT_DEBUG_INT */ |
| 57 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 58 | static void kvmppc_end_cede(struct kvm_vcpu *vcpu); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 59 | static int kvmppc_hv_setup_rma(struct kvm_vcpu *vcpu); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 60 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 61 | void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
| 62 | { |
| 63 | local_paca->kvm_hstate.kvm_vcpu = vcpu; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 64 | local_paca->kvm_hstate.kvm_vcore = vcpu->arch.vcore; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 65 | } |
| 66 | |
| 67 | void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu) |
| 68 | { |
| 69 | } |
| 70 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 71 | void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr) |
| 72 | { |
| 73 | vcpu->arch.shregs.msr = msr; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 74 | kvmppc_end_cede(vcpu); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 75 | } |
| 76 | |
| 77 | void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr) |
| 78 | { |
| 79 | vcpu->arch.pvr = pvr; |
| 80 | } |
| 81 | |
| 82 | void kvmppc_dump_regs(struct kvm_vcpu *vcpu) |
| 83 | { |
| 84 | int r; |
| 85 | |
| 86 | pr_err("vcpu %p (%d):\n", vcpu, vcpu->vcpu_id); |
| 87 | pr_err("pc = %.16lx msr = %.16llx trap = %x\n", |
| 88 | vcpu->arch.pc, vcpu->arch.shregs.msr, vcpu->arch.trap); |
| 89 | for (r = 0; r < 16; ++r) |
| 90 | pr_err("r%2d = %.16lx r%d = %.16lx\n", |
| 91 | r, kvmppc_get_gpr(vcpu, r), |
| 92 | r+16, kvmppc_get_gpr(vcpu, r+16)); |
| 93 | pr_err("ctr = %.16lx lr = %.16lx\n", |
| 94 | vcpu->arch.ctr, vcpu->arch.lr); |
| 95 | pr_err("srr0 = %.16llx srr1 = %.16llx\n", |
| 96 | vcpu->arch.shregs.srr0, vcpu->arch.shregs.srr1); |
| 97 | pr_err("sprg0 = %.16llx sprg1 = %.16llx\n", |
| 98 | vcpu->arch.shregs.sprg0, vcpu->arch.shregs.sprg1); |
| 99 | pr_err("sprg2 = %.16llx sprg3 = %.16llx\n", |
| 100 | vcpu->arch.shregs.sprg2, vcpu->arch.shregs.sprg3); |
| 101 | pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n", |
| 102 | vcpu->arch.cr, vcpu->arch.xer, vcpu->arch.shregs.dsisr); |
| 103 | pr_err("dar = %.16llx\n", vcpu->arch.shregs.dar); |
| 104 | pr_err("fault dar = %.16lx dsisr = %.8x\n", |
| 105 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); |
| 106 | pr_err("SLB (%d entries):\n", vcpu->arch.slb_max); |
| 107 | for (r = 0; r < vcpu->arch.slb_max; ++r) |
| 108 | pr_err(" ESID = %.16llx VSID = %.16llx\n", |
| 109 | vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv); |
| 110 | pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n", |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 111 | vcpu->kvm->arch.lpcr, vcpu->kvm->arch.sdr1, |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 112 | vcpu->arch.last_inst); |
| 113 | } |
| 114 | |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 115 | struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id) |
| 116 | { |
| 117 | int r; |
| 118 | struct kvm_vcpu *v, *ret = NULL; |
| 119 | |
| 120 | mutex_lock(&kvm->lock); |
| 121 | kvm_for_each_vcpu(r, v, kvm) { |
| 122 | if (v->vcpu_id == id) { |
| 123 | ret = v; |
| 124 | break; |
| 125 | } |
| 126 | } |
| 127 | mutex_unlock(&kvm->lock); |
| 128 | return ret; |
| 129 | } |
| 130 | |
| 131 | static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa) |
| 132 | { |
| 133 | vpa->shared_proc = 1; |
| 134 | vpa->yield_count = 1; |
| 135 | } |
| 136 | |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame^] | 137 | /* Length for a per-processor buffer is passed in at offset 4 in the buffer */ |
| 138 | struct reg_vpa { |
| 139 | u32 dummy; |
| 140 | union { |
| 141 | u16 hword; |
| 142 | u32 word; |
| 143 | } length; |
| 144 | }; |
| 145 | |
| 146 | static int vpa_is_registered(struct kvmppc_vpa *vpap) |
| 147 | { |
| 148 | if (vpap->update_pending) |
| 149 | return vpap->next_gpa != 0; |
| 150 | return vpap->pinned_addr != NULL; |
| 151 | } |
| 152 | |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 153 | static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu, |
| 154 | unsigned long flags, |
| 155 | unsigned long vcpuid, unsigned long vpa) |
| 156 | { |
| 157 | struct kvm *kvm = vcpu->kvm; |
Paul Mackerras | 93e6024 | 2011-12-12 12:28:55 +0000 | [diff] [blame] | 158 | unsigned long len, nb; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 159 | void *va; |
| 160 | struct kvm_vcpu *tvcpu; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame^] | 161 | int err; |
| 162 | int subfunc; |
| 163 | struct kvmppc_vpa *vpap; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 164 | |
| 165 | tvcpu = kvmppc_find_vcpu(kvm, vcpuid); |
| 166 | if (!tvcpu) |
| 167 | return H_PARAMETER; |
| 168 | |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame^] | 169 | subfunc = (flags >> H_VPA_FUNC_SHIFT) & H_VPA_FUNC_MASK; |
| 170 | if (subfunc == H_VPA_REG_VPA || subfunc == H_VPA_REG_DTL || |
| 171 | subfunc == H_VPA_REG_SLB) { |
| 172 | /* Registering new area - address must be cache-line aligned */ |
| 173 | if ((vpa & (L1_CACHE_BYTES - 1)) || !vpa) |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 174 | return H_PARAMETER; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame^] | 175 | |
| 176 | /* convert logical addr to kernel addr and read length */ |
Paul Mackerras | 93e6024 | 2011-12-12 12:28:55 +0000 | [diff] [blame] | 177 | va = kvmppc_pin_guest_page(kvm, vpa, &nb); |
| 178 | if (va == NULL) |
Paul Mackerras | b2b2f16 | 2011-12-12 12:28:21 +0000 | [diff] [blame] | 179 | return H_PARAMETER; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame^] | 180 | if (subfunc == H_VPA_REG_VPA) |
| 181 | len = ((struct reg_vpa *)va)->length.hword; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 182 | else |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame^] | 183 | len = ((struct reg_vpa *)va)->length.word; |
| 184 | kvmppc_unpin_guest_page(kvm, va); |
| 185 | |
| 186 | /* Check length */ |
| 187 | if (len > nb || len < sizeof(struct reg_vpa)) |
| 188 | return H_PARAMETER; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 189 | } else { |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame^] | 190 | vpa = 0; |
| 191 | len = 0; |
| 192 | } |
| 193 | |
| 194 | err = H_PARAMETER; |
| 195 | vpap = NULL; |
| 196 | spin_lock(&tvcpu->arch.vpa_update_lock); |
| 197 | |
| 198 | switch (subfunc) { |
| 199 | case H_VPA_REG_VPA: /* register VPA */ |
| 200 | if (len < sizeof(struct lppaca)) |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 201 | break; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame^] | 202 | vpap = &tvcpu->arch.vpa; |
| 203 | err = 0; |
| 204 | break; |
| 205 | |
| 206 | case H_VPA_REG_DTL: /* register DTL */ |
| 207 | if (len < sizeof(struct dtl_entry)) |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 208 | break; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame^] | 209 | len -= len % sizeof(struct dtl_entry); |
| 210 | |
| 211 | /* Check that they have previously registered a VPA */ |
| 212 | err = H_RESOURCE; |
| 213 | if (!vpa_is_registered(&tvcpu->arch.vpa)) |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 214 | break; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame^] | 215 | |
| 216 | vpap = &tvcpu->arch.dtl; |
| 217 | err = 0; |
| 218 | break; |
| 219 | |
| 220 | case H_VPA_REG_SLB: /* register SLB shadow buffer */ |
| 221 | /* Check that they have previously registered a VPA */ |
| 222 | err = H_RESOURCE; |
| 223 | if (!vpa_is_registered(&tvcpu->arch.vpa)) |
| 224 | break; |
| 225 | |
| 226 | vpap = &tvcpu->arch.slb_shadow; |
| 227 | err = 0; |
| 228 | break; |
| 229 | |
| 230 | case H_VPA_DEREG_VPA: /* deregister VPA */ |
| 231 | /* Check they don't still have a DTL or SLB buf registered */ |
| 232 | err = H_RESOURCE; |
| 233 | if (vpa_is_registered(&tvcpu->arch.dtl) || |
| 234 | vpa_is_registered(&tvcpu->arch.slb_shadow)) |
| 235 | break; |
| 236 | |
| 237 | vpap = &tvcpu->arch.vpa; |
| 238 | err = 0; |
| 239 | break; |
| 240 | |
| 241 | case H_VPA_DEREG_DTL: /* deregister DTL */ |
| 242 | vpap = &tvcpu->arch.dtl; |
| 243 | err = 0; |
| 244 | break; |
| 245 | |
| 246 | case H_VPA_DEREG_SLB: /* deregister SLB shadow buffer */ |
| 247 | vpap = &tvcpu->arch.slb_shadow; |
| 248 | err = 0; |
| 249 | break; |
| 250 | } |
| 251 | |
| 252 | if (vpap) { |
| 253 | vpap->next_gpa = vpa; |
| 254 | vpap->len = len; |
| 255 | vpap->update_pending = 1; |
| 256 | } |
| 257 | |
| 258 | spin_unlock(&tvcpu->arch.vpa_update_lock); |
| 259 | |
| 260 | return err; |
| 261 | } |
| 262 | |
| 263 | static void kvmppc_update_vpa(struct kvm *kvm, struct kvmppc_vpa *vpap) |
| 264 | { |
| 265 | void *va; |
| 266 | unsigned long nb; |
| 267 | |
| 268 | vpap->update_pending = 0; |
| 269 | va = NULL; |
| 270 | if (vpap->next_gpa) { |
| 271 | va = kvmppc_pin_guest_page(kvm, vpap->next_gpa, &nb); |
| 272 | if (nb < vpap->len) { |
| 273 | /* |
| 274 | * If it's now too short, it must be that userspace |
| 275 | * has changed the mappings underlying guest memory, |
| 276 | * so unregister the region. |
| 277 | */ |
| 278 | kvmppc_unpin_guest_page(kvm, va); |
| 279 | va = NULL; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 280 | } |
| 281 | } |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame^] | 282 | if (vpap->pinned_addr) |
| 283 | kvmppc_unpin_guest_page(kvm, vpap->pinned_addr); |
| 284 | vpap->pinned_addr = va; |
| 285 | if (va) |
| 286 | vpap->pinned_end = va + vpap->len; |
| 287 | } |
Paul Mackerras | 93e6024 | 2011-12-12 12:28:55 +0000 | [diff] [blame] | 288 | |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame^] | 289 | static void kvmppc_update_vpas(struct kvm_vcpu *vcpu) |
| 290 | { |
| 291 | struct kvm *kvm = vcpu->kvm; |
| 292 | |
| 293 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 294 | if (vcpu->arch.vpa.update_pending) { |
| 295 | kvmppc_update_vpa(kvm, &vcpu->arch.vpa); |
| 296 | init_vpa(vcpu, vcpu->arch.vpa.pinned_addr); |
| 297 | } |
| 298 | if (vcpu->arch.dtl.update_pending) { |
| 299 | kvmppc_update_vpa(kvm, &vcpu->arch.dtl); |
| 300 | vcpu->arch.dtl_ptr = vcpu->arch.dtl.pinned_addr; |
| 301 | vcpu->arch.dtl_index = 0; |
| 302 | } |
| 303 | if (vcpu->arch.slb_shadow.update_pending) |
| 304 | kvmppc_update_vpa(kvm, &vcpu->arch.slb_shadow); |
| 305 | spin_unlock(&vcpu->arch.vpa_update_lock); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 306 | } |
| 307 | |
| 308 | int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) |
| 309 | { |
| 310 | unsigned long req = kvmppc_get_gpr(vcpu, 3); |
| 311 | unsigned long target, ret = H_SUCCESS; |
| 312 | struct kvm_vcpu *tvcpu; |
| 313 | |
| 314 | switch (req) { |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 315 | case H_ENTER: |
| 316 | ret = kvmppc_virtmode_h_enter(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 317 | kvmppc_get_gpr(vcpu, 5), |
| 318 | kvmppc_get_gpr(vcpu, 6), |
| 319 | kvmppc_get_gpr(vcpu, 7)); |
| 320 | break; |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 321 | case H_CEDE: |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 322 | break; |
| 323 | case H_PROD: |
| 324 | target = kvmppc_get_gpr(vcpu, 4); |
| 325 | tvcpu = kvmppc_find_vcpu(vcpu->kvm, target); |
| 326 | if (!tvcpu) { |
| 327 | ret = H_PARAMETER; |
| 328 | break; |
| 329 | } |
| 330 | tvcpu->arch.prodded = 1; |
| 331 | smp_mb(); |
| 332 | if (vcpu->arch.ceded) { |
| 333 | if (waitqueue_active(&vcpu->wq)) { |
| 334 | wake_up_interruptible(&vcpu->wq); |
| 335 | vcpu->stat.halt_wakeup++; |
| 336 | } |
| 337 | } |
| 338 | break; |
| 339 | case H_CONFER: |
| 340 | break; |
| 341 | case H_REGISTER_VPA: |
| 342 | ret = do_h_register_vpa(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 343 | kvmppc_get_gpr(vcpu, 5), |
| 344 | kvmppc_get_gpr(vcpu, 6)); |
| 345 | break; |
| 346 | default: |
| 347 | return RESUME_HOST; |
| 348 | } |
| 349 | kvmppc_set_gpr(vcpu, 3, ret); |
| 350 | vcpu->arch.hcall_needed = 0; |
| 351 | return RESUME_GUEST; |
| 352 | } |
| 353 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 354 | static int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, |
| 355 | struct task_struct *tsk) |
| 356 | { |
| 357 | int r = RESUME_HOST; |
| 358 | |
| 359 | vcpu->stat.sum_exits++; |
| 360 | |
| 361 | run->exit_reason = KVM_EXIT_UNKNOWN; |
| 362 | run->ready_for_interrupt_injection = 1; |
| 363 | switch (vcpu->arch.trap) { |
| 364 | /* We're good on these - the host merely wanted to get our attention */ |
| 365 | case BOOK3S_INTERRUPT_HV_DECREMENTER: |
| 366 | vcpu->stat.dec_exits++; |
| 367 | r = RESUME_GUEST; |
| 368 | break; |
| 369 | case BOOK3S_INTERRUPT_EXTERNAL: |
| 370 | vcpu->stat.ext_intr_exits++; |
| 371 | r = RESUME_GUEST; |
| 372 | break; |
| 373 | case BOOK3S_INTERRUPT_PERFMON: |
| 374 | r = RESUME_GUEST; |
| 375 | break; |
| 376 | case BOOK3S_INTERRUPT_PROGRAM: |
| 377 | { |
| 378 | ulong flags; |
| 379 | /* |
| 380 | * Normally program interrupts are delivered directly |
| 381 | * to the guest by the hardware, but we can get here |
| 382 | * as a result of a hypervisor emulation interrupt |
| 383 | * (e40) getting turned into a 700 by BML RTAS. |
| 384 | */ |
| 385 | flags = vcpu->arch.shregs.msr & 0x1f0000ull; |
| 386 | kvmppc_core_queue_program(vcpu, flags); |
| 387 | r = RESUME_GUEST; |
| 388 | break; |
| 389 | } |
| 390 | case BOOK3S_INTERRUPT_SYSCALL: |
| 391 | { |
| 392 | /* hcall - punt to userspace */ |
| 393 | int i; |
| 394 | |
| 395 | if (vcpu->arch.shregs.msr & MSR_PR) { |
| 396 | /* sc 1 from userspace - reflect to guest syscall */ |
| 397 | kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_SYSCALL); |
| 398 | r = RESUME_GUEST; |
| 399 | break; |
| 400 | } |
| 401 | run->papr_hcall.nr = kvmppc_get_gpr(vcpu, 3); |
| 402 | for (i = 0; i < 9; ++i) |
| 403 | run->papr_hcall.args[i] = kvmppc_get_gpr(vcpu, 4 + i); |
| 404 | run->exit_reason = KVM_EXIT_PAPR_HCALL; |
| 405 | vcpu->arch.hcall_needed = 1; |
| 406 | r = RESUME_HOST; |
| 407 | break; |
| 408 | } |
| 409 | /* |
Paul Mackerras | 342d3db | 2011-12-12 12:38:05 +0000 | [diff] [blame] | 410 | * We get these next two if the guest accesses a page which it thinks |
| 411 | * it has mapped but which is not actually present, either because |
| 412 | * it is for an emulated I/O device or because the corresonding |
| 413 | * host page has been paged out. Any other HDSI/HISI interrupts |
| 414 | * have been handled already. |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 415 | */ |
| 416 | case BOOK3S_INTERRUPT_H_DATA_STORAGE: |
Paul Mackerras | 697d389 | 2011-12-12 12:36:37 +0000 | [diff] [blame] | 417 | r = kvmppc_book3s_hv_page_fault(run, vcpu, |
| 418 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 419 | break; |
| 420 | case BOOK3S_INTERRUPT_H_INST_STORAGE: |
Paul Mackerras | 342d3db | 2011-12-12 12:38:05 +0000 | [diff] [blame] | 421 | r = kvmppc_book3s_hv_page_fault(run, vcpu, |
| 422 | kvmppc_get_pc(vcpu), 0); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 423 | break; |
| 424 | /* |
| 425 | * This occurs if the guest executes an illegal instruction. |
| 426 | * We just generate a program interrupt to the guest, since |
| 427 | * we don't emulate any guest instructions at this stage. |
| 428 | */ |
| 429 | case BOOK3S_INTERRUPT_H_EMUL_ASSIST: |
| 430 | kvmppc_core_queue_program(vcpu, 0x80000); |
| 431 | r = RESUME_GUEST; |
| 432 | break; |
| 433 | default: |
| 434 | kvmppc_dump_regs(vcpu); |
| 435 | printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n", |
| 436 | vcpu->arch.trap, kvmppc_get_pc(vcpu), |
| 437 | vcpu->arch.shregs.msr); |
| 438 | r = RESUME_HOST; |
| 439 | BUG(); |
| 440 | break; |
| 441 | } |
| 442 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 443 | return r; |
| 444 | } |
| 445 | |
| 446 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
| 447 | struct kvm_sregs *sregs) |
| 448 | { |
| 449 | int i; |
| 450 | |
| 451 | sregs->pvr = vcpu->arch.pvr; |
| 452 | |
| 453 | memset(sregs, 0, sizeof(struct kvm_sregs)); |
| 454 | for (i = 0; i < vcpu->arch.slb_max; i++) { |
| 455 | sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige; |
| 456 | sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv; |
| 457 | } |
| 458 | |
| 459 | return 0; |
| 460 | } |
| 461 | |
| 462 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
| 463 | struct kvm_sregs *sregs) |
| 464 | { |
| 465 | int i, j; |
| 466 | |
| 467 | kvmppc_set_pvr(vcpu, sregs->pvr); |
| 468 | |
| 469 | j = 0; |
| 470 | for (i = 0; i < vcpu->arch.slb_nr; i++) { |
| 471 | if (sregs->u.s.ppc64.slb[i].slbe & SLB_ESID_V) { |
| 472 | vcpu->arch.slb[j].orige = sregs->u.s.ppc64.slb[i].slbe; |
| 473 | vcpu->arch.slb[j].origv = sregs->u.s.ppc64.slb[i].slbv; |
| 474 | ++j; |
| 475 | } |
| 476 | } |
| 477 | vcpu->arch.slb_max = j; |
| 478 | |
| 479 | return 0; |
| 480 | } |
| 481 | |
Paul Mackerras | 31f3438 | 2011-12-12 12:26:50 +0000 | [diff] [blame] | 482 | int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) |
| 483 | { |
| 484 | int r = -EINVAL; |
| 485 | |
| 486 | switch (reg->id) { |
| 487 | case KVM_REG_PPC_HIOR: |
| 488 | r = put_user(0, (u64 __user *)reg->addr); |
| 489 | break; |
| 490 | default: |
| 491 | break; |
| 492 | } |
| 493 | |
| 494 | return r; |
| 495 | } |
| 496 | |
| 497 | int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) |
| 498 | { |
| 499 | int r = -EINVAL; |
| 500 | |
| 501 | switch (reg->id) { |
| 502 | case KVM_REG_PPC_HIOR: |
| 503 | { |
| 504 | u64 hior; |
| 505 | /* Only allow this to be set to zero */ |
| 506 | r = get_user(hior, (u64 __user *)reg->addr); |
| 507 | if (!r && (hior != 0)) |
| 508 | r = -EINVAL; |
| 509 | break; |
| 510 | } |
| 511 | default: |
| 512 | break; |
| 513 | } |
| 514 | |
| 515 | return r; |
| 516 | } |
| 517 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 518 | int kvmppc_core_check_processor_compat(void) |
| 519 | { |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 520 | if (cpu_has_feature(CPU_FTR_HVMODE)) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 521 | return 0; |
| 522 | return -EIO; |
| 523 | } |
| 524 | |
| 525 | struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id) |
| 526 | { |
| 527 | struct kvm_vcpu *vcpu; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 528 | int err = -EINVAL; |
| 529 | int core; |
| 530 | struct kvmppc_vcore *vcore; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 531 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 532 | core = id / threads_per_core; |
| 533 | if (core >= KVM_MAX_VCORES) |
| 534 | goto out; |
| 535 | |
| 536 | err = -ENOMEM; |
Sasha Levin | 6b75e6b | 2011-12-07 10:24:56 +0200 | [diff] [blame] | 537 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 538 | if (!vcpu) |
| 539 | goto out; |
| 540 | |
| 541 | err = kvm_vcpu_init(vcpu, kvm, id); |
| 542 | if (err) |
| 543 | goto free_vcpu; |
| 544 | |
| 545 | vcpu->arch.shared = &vcpu->arch.shregs; |
| 546 | vcpu->arch.last_cpu = -1; |
| 547 | vcpu->arch.mmcr[0] = MMCR0_FC; |
| 548 | vcpu->arch.ctrl = CTRL_RUNLATCH; |
| 549 | /* default to host PVR, since we can't spoof it */ |
| 550 | vcpu->arch.pvr = mfspr(SPRN_PVR); |
| 551 | kvmppc_set_pvr(vcpu, vcpu->arch.pvr); |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame^] | 552 | spin_lock_init(&vcpu->arch.vpa_update_lock); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 553 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 554 | kvmppc_mmu_book3s_hv_init(vcpu); |
| 555 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 556 | /* |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 557 | * We consider the vcpu stopped until we see the first run ioctl for it. |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 558 | */ |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 559 | vcpu->arch.state = KVMPPC_VCPU_STOPPED; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 560 | |
| 561 | init_waitqueue_head(&vcpu->arch.cpu_run); |
| 562 | |
| 563 | mutex_lock(&kvm->lock); |
| 564 | vcore = kvm->arch.vcores[core]; |
| 565 | if (!vcore) { |
| 566 | vcore = kzalloc(sizeof(struct kvmppc_vcore), GFP_KERNEL); |
| 567 | if (vcore) { |
| 568 | INIT_LIST_HEAD(&vcore->runnable_threads); |
| 569 | spin_lock_init(&vcore->lock); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 570 | init_waitqueue_head(&vcore->wq); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 571 | } |
| 572 | kvm->arch.vcores[core] = vcore; |
| 573 | } |
| 574 | mutex_unlock(&kvm->lock); |
| 575 | |
| 576 | if (!vcore) |
| 577 | goto free_vcpu; |
| 578 | |
| 579 | spin_lock(&vcore->lock); |
| 580 | ++vcore->num_threads; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 581 | spin_unlock(&vcore->lock); |
| 582 | vcpu->arch.vcore = vcore; |
| 583 | |
Alexander Graf | af8f38b | 2011-08-10 13:57:08 +0200 | [diff] [blame] | 584 | vcpu->arch.cpu_type = KVM_CPU_3S_64; |
| 585 | kvmppc_sanity_check(vcpu); |
| 586 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 587 | return vcpu; |
| 588 | |
| 589 | free_vcpu: |
Sasha Levin | 6b75e6b | 2011-12-07 10:24:56 +0200 | [diff] [blame] | 590 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 591 | out: |
| 592 | return ERR_PTR(err); |
| 593 | } |
| 594 | |
| 595 | void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu) |
| 596 | { |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame^] | 597 | spin_lock(&vcpu->arch.vpa_update_lock); |
| 598 | if (vcpu->arch.dtl.pinned_addr) |
| 599 | kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.dtl.pinned_addr); |
| 600 | if (vcpu->arch.slb_shadow.pinned_addr) |
| 601 | kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.slb_shadow.pinned_addr); |
| 602 | if (vcpu->arch.vpa.pinned_addr) |
| 603 | kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.vpa.pinned_addr); |
| 604 | spin_unlock(&vcpu->arch.vpa_update_lock); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 605 | kvm_vcpu_uninit(vcpu); |
Sasha Levin | 6b75e6b | 2011-12-07 10:24:56 +0200 | [diff] [blame] | 606 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 607 | } |
| 608 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 609 | static void kvmppc_set_timer(struct kvm_vcpu *vcpu) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 610 | { |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 611 | unsigned long dec_nsec, now; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 612 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 613 | now = get_tb(); |
| 614 | if (now > vcpu->arch.dec_expires) { |
| 615 | /* decrementer has already gone negative */ |
| 616 | kvmppc_core_queue_dec(vcpu); |
Scott Wood | 7e28e60e | 2011-11-08 18:23:20 -0600 | [diff] [blame] | 617 | kvmppc_core_prepare_to_enter(vcpu); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 618 | return; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 619 | } |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 620 | dec_nsec = (vcpu->arch.dec_expires - now) * NSEC_PER_SEC |
| 621 | / tb_ticks_per_sec; |
| 622 | hrtimer_start(&vcpu->arch.dec_timer, ktime_set(0, dec_nsec), |
| 623 | HRTIMER_MODE_REL); |
| 624 | vcpu->arch.timer_running = 1; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 625 | } |
| 626 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 627 | static void kvmppc_end_cede(struct kvm_vcpu *vcpu) |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 628 | { |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 629 | vcpu->arch.ceded = 0; |
| 630 | if (vcpu->arch.timer_running) { |
| 631 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); |
| 632 | vcpu->arch.timer_running = 0; |
| 633 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 634 | } |
| 635 | |
| 636 | extern int __kvmppc_vcore_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu); |
| 637 | extern void xics_wake_cpu(int cpu); |
| 638 | |
| 639 | static void kvmppc_remove_runnable(struct kvmppc_vcore *vc, |
| 640 | struct kvm_vcpu *vcpu) |
| 641 | { |
| 642 | struct kvm_vcpu *v; |
| 643 | |
| 644 | if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) |
| 645 | return; |
| 646 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; |
| 647 | --vc->n_runnable; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 648 | ++vc->n_busy; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 649 | /* decrement the physical thread id of each following vcpu */ |
| 650 | v = vcpu; |
| 651 | list_for_each_entry_continue(v, &vc->runnable_threads, arch.run_list) |
| 652 | --v->arch.ptid; |
| 653 | list_del(&vcpu->arch.run_list); |
| 654 | } |
| 655 | |
Paul Mackerras | f0888f7 | 2012-02-03 00:54:17 +0000 | [diff] [blame] | 656 | static int kvmppc_grab_hwthread(int cpu) |
| 657 | { |
| 658 | struct paca_struct *tpaca; |
| 659 | long timeout = 1000; |
| 660 | |
| 661 | tpaca = &paca[cpu]; |
| 662 | |
| 663 | /* Ensure the thread won't go into the kernel if it wakes */ |
| 664 | tpaca->kvm_hstate.hwthread_req = 1; |
| 665 | |
| 666 | /* |
| 667 | * If the thread is already executing in the kernel (e.g. handling |
| 668 | * a stray interrupt), wait for it to get back to nap mode. |
| 669 | * The smp_mb() is to ensure that our setting of hwthread_req |
| 670 | * is visible before we look at hwthread_state, so if this |
| 671 | * races with the code at system_reset_pSeries and the thread |
| 672 | * misses our setting of hwthread_req, we are sure to see its |
| 673 | * setting of hwthread_state, and vice versa. |
| 674 | */ |
| 675 | smp_mb(); |
| 676 | while (tpaca->kvm_hstate.hwthread_state == KVM_HWTHREAD_IN_KERNEL) { |
| 677 | if (--timeout <= 0) { |
| 678 | pr_err("KVM: couldn't grab cpu %d\n", cpu); |
| 679 | return -EBUSY; |
| 680 | } |
| 681 | udelay(1); |
| 682 | } |
| 683 | return 0; |
| 684 | } |
| 685 | |
| 686 | static void kvmppc_release_hwthread(int cpu) |
| 687 | { |
| 688 | struct paca_struct *tpaca; |
| 689 | |
| 690 | tpaca = &paca[cpu]; |
| 691 | tpaca->kvm_hstate.hwthread_req = 0; |
| 692 | tpaca->kvm_hstate.kvm_vcpu = NULL; |
| 693 | } |
| 694 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 695 | static void kvmppc_start_thread(struct kvm_vcpu *vcpu) |
| 696 | { |
| 697 | int cpu; |
| 698 | struct paca_struct *tpaca; |
| 699 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
| 700 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 701 | if (vcpu->arch.timer_running) { |
| 702 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); |
| 703 | vcpu->arch.timer_running = 0; |
| 704 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 705 | cpu = vc->pcpu + vcpu->arch.ptid; |
| 706 | tpaca = &paca[cpu]; |
| 707 | tpaca->kvm_hstate.kvm_vcpu = vcpu; |
| 708 | tpaca->kvm_hstate.kvm_vcore = vc; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 709 | tpaca->kvm_hstate.napping = 0; |
| 710 | vcpu->cpu = vc->pcpu; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 711 | smp_wmb(); |
Michael Neuling | 251da03 | 2011-11-10 16:03:20 +0000 | [diff] [blame] | 712 | #if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP) |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 713 | if (vcpu->arch.ptid) { |
Paul Mackerras | f0888f7 | 2012-02-03 00:54:17 +0000 | [diff] [blame] | 714 | kvmppc_grab_hwthread(cpu); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 715 | xics_wake_cpu(cpu); |
| 716 | ++vc->n_woken; |
| 717 | } |
| 718 | #endif |
| 719 | } |
| 720 | |
| 721 | static void kvmppc_wait_for_nap(struct kvmppc_vcore *vc) |
| 722 | { |
| 723 | int i; |
| 724 | |
| 725 | HMT_low(); |
| 726 | i = 0; |
| 727 | while (vc->nap_count < vc->n_woken) { |
| 728 | if (++i >= 1000000) { |
| 729 | pr_err("kvmppc_wait_for_nap timeout %d %d\n", |
| 730 | vc->nap_count, vc->n_woken); |
| 731 | break; |
| 732 | } |
| 733 | cpu_relax(); |
| 734 | } |
| 735 | HMT_medium(); |
| 736 | } |
| 737 | |
| 738 | /* |
| 739 | * Check that we are on thread 0 and that any other threads in |
| 740 | * this core are off-line. |
| 741 | */ |
| 742 | static int on_primary_thread(void) |
| 743 | { |
| 744 | int cpu = smp_processor_id(); |
| 745 | int thr = cpu_thread_in_core(cpu); |
| 746 | |
| 747 | if (thr) |
| 748 | return 0; |
| 749 | while (++thr < threads_per_core) |
| 750 | if (cpu_online(cpu + thr)) |
| 751 | return 0; |
| 752 | return 1; |
| 753 | } |
| 754 | |
| 755 | /* |
| 756 | * Run a set of guest threads on a physical core. |
| 757 | * Called with vc->lock held. |
| 758 | */ |
| 759 | static int kvmppc_run_core(struct kvmppc_vcore *vc) |
| 760 | { |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 761 | struct kvm_vcpu *vcpu, *vcpu0, *vnext; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 762 | long ret; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 763 | u64 now; |
Paul Mackerras | f0888f7 | 2012-02-03 00:54:17 +0000 | [diff] [blame] | 764 | int ptid, i; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 765 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 766 | /* don't start if any threads have a signal pending */ |
| 767 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) |
| 768 | if (signal_pending(vcpu->arch.run_task)) |
| 769 | return 0; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 770 | |
| 771 | /* |
| 772 | * Make sure we are running on thread 0, and that |
| 773 | * secondary threads are offline. |
| 774 | * XXX we should also block attempts to bring any |
| 775 | * secondary threads online. |
| 776 | */ |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 777 | if (threads_per_core > 1 && !on_primary_thread()) { |
| 778 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) |
| 779 | vcpu->arch.ret = -EBUSY; |
| 780 | goto out; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 781 | } |
| 782 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 783 | /* |
| 784 | * Assign physical thread IDs, first to non-ceded vcpus |
| 785 | * and then to ceded ones. |
| 786 | */ |
| 787 | ptid = 0; |
| 788 | vcpu0 = NULL; |
| 789 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { |
| 790 | if (!vcpu->arch.ceded) { |
| 791 | if (!ptid) |
| 792 | vcpu0 = vcpu; |
| 793 | vcpu->arch.ptid = ptid++; |
| 794 | } |
| 795 | } |
| 796 | if (!vcpu0) |
| 797 | return 0; /* nothing to run */ |
| 798 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) |
| 799 | if (vcpu->arch.ceded) |
| 800 | vcpu->arch.ptid = ptid++; |
| 801 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 802 | vc->n_woken = 0; |
| 803 | vc->nap_count = 0; |
| 804 | vc->entry_exit_count = 0; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 805 | vc->vcore_state = VCORE_RUNNING; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 806 | vc->in_guest = 0; |
| 807 | vc->pcpu = smp_processor_id(); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 808 | vc->napping_threads = 0; |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame^] | 809 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 810 | kvmppc_start_thread(vcpu); |
Paul Mackerras | 2e25aa5 | 2012-02-19 17:46:32 +0000 | [diff] [blame^] | 811 | if (vcpu->arch.vpa.update_pending || |
| 812 | vcpu->arch.slb_shadow.update_pending || |
| 813 | vcpu->arch.dtl.update_pending) |
| 814 | kvmppc_update_vpas(vcpu); |
| 815 | } |
Paul Mackerras | f0888f7 | 2012-02-03 00:54:17 +0000 | [diff] [blame] | 816 | /* Grab any remaining hw threads so they can't go into the kernel */ |
| 817 | for (i = ptid; i < threads_per_core; ++i) |
| 818 | kvmppc_grab_hwthread(vc->pcpu + i); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 819 | |
| 820 | preempt_disable(); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 821 | spin_unlock(&vc->lock); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 822 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 823 | kvm_guest_enter(); |
| 824 | __kvmppc_vcore_entry(NULL, vcpu0); |
Paul Mackerras | f0888f7 | 2012-02-03 00:54:17 +0000 | [diff] [blame] | 825 | for (i = 0; i < threads_per_core; ++i) |
| 826 | kvmppc_release_hwthread(vc->pcpu + i); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 827 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 828 | spin_lock(&vc->lock); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 829 | /* disable sending of IPIs on virtual external irqs */ |
| 830 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) |
| 831 | vcpu->cpu = -1; |
| 832 | /* wait for secondary threads to finish writing their state to memory */ |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 833 | if (vc->nap_count < vc->n_woken) |
| 834 | kvmppc_wait_for_nap(vc); |
| 835 | /* prevent other vcpu threads from doing kvmppc_start_thread() now */ |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 836 | vc->vcore_state = VCORE_EXITING; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 837 | spin_unlock(&vc->lock); |
| 838 | |
| 839 | /* make sure updates to secondary vcpu structs are visible now */ |
| 840 | smp_mb(); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 841 | kvm_guest_exit(); |
| 842 | |
| 843 | preempt_enable(); |
| 844 | kvm_resched(vcpu); |
| 845 | |
| 846 | now = get_tb(); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 847 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { |
| 848 | /* cancel pending dec exception if dec is positive */ |
| 849 | if (now < vcpu->arch.dec_expires && |
| 850 | kvmppc_core_pending_dec(vcpu)) |
| 851 | kvmppc_core_dequeue_dec(vcpu); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 852 | |
| 853 | ret = RESUME_GUEST; |
| 854 | if (vcpu->arch.trap) |
| 855 | ret = kvmppc_handle_exit(vcpu->arch.kvm_run, vcpu, |
| 856 | vcpu->arch.run_task); |
| 857 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 858 | vcpu->arch.ret = ret; |
| 859 | vcpu->arch.trap = 0; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 860 | |
| 861 | if (vcpu->arch.ceded) { |
| 862 | if (ret != RESUME_GUEST) |
| 863 | kvmppc_end_cede(vcpu); |
| 864 | else |
| 865 | kvmppc_set_timer(vcpu); |
| 866 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 867 | } |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 868 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 869 | spin_lock(&vc->lock); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 870 | out: |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 871 | vc->vcore_state = VCORE_INACTIVE; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 872 | list_for_each_entry_safe(vcpu, vnext, &vc->runnable_threads, |
| 873 | arch.run_list) { |
| 874 | if (vcpu->arch.ret != RESUME_GUEST) { |
| 875 | kvmppc_remove_runnable(vc, vcpu); |
| 876 | wake_up(&vcpu->arch.cpu_run); |
| 877 | } |
| 878 | } |
| 879 | |
| 880 | return 1; |
| 881 | } |
| 882 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 883 | /* |
| 884 | * Wait for some other vcpu thread to execute us, and |
| 885 | * wake us up when we need to handle something in the host. |
| 886 | */ |
| 887 | 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] | 888 | { |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 889 | DEFINE_WAIT(wait); |
| 890 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 891 | prepare_to_wait(&vcpu->arch.cpu_run, &wait, wait_state); |
| 892 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) |
| 893 | schedule(); |
| 894 | finish_wait(&vcpu->arch.cpu_run, &wait); |
| 895 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 896 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 897 | /* |
| 898 | * All the vcpus in this vcore are idle, so wait for a decrementer |
| 899 | * or external interrupt to one of the vcpus. vc->lock is held. |
| 900 | */ |
| 901 | static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc) |
| 902 | { |
| 903 | DEFINE_WAIT(wait); |
| 904 | struct kvm_vcpu *v; |
| 905 | int all_idle = 1; |
| 906 | |
| 907 | prepare_to_wait(&vc->wq, &wait, TASK_INTERRUPTIBLE); |
| 908 | vc->vcore_state = VCORE_SLEEPING; |
| 909 | spin_unlock(&vc->lock); |
| 910 | list_for_each_entry(v, &vc->runnable_threads, arch.run_list) { |
| 911 | if (!v->arch.ceded || v->arch.pending_exceptions) { |
| 912 | all_idle = 0; |
| 913 | break; |
| 914 | } |
| 915 | } |
| 916 | if (all_idle) |
| 917 | schedule(); |
| 918 | finish_wait(&vc->wq, &wait); |
| 919 | spin_lock(&vc->lock); |
| 920 | vc->vcore_state = VCORE_INACTIVE; |
| 921 | } |
| 922 | |
| 923 | static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) |
| 924 | { |
| 925 | int n_ceded; |
| 926 | int prev_state; |
| 927 | struct kvmppc_vcore *vc; |
| 928 | struct kvm_vcpu *v, *vn; |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 929 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 930 | kvm_run->exit_reason = 0; |
| 931 | vcpu->arch.ret = RESUME_GUEST; |
| 932 | vcpu->arch.trap = 0; |
| 933 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 934 | /* |
| 935 | * Synchronize with other threads in this virtual core |
| 936 | */ |
| 937 | vc = vcpu->arch.vcore; |
| 938 | spin_lock(&vc->lock); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 939 | vcpu->arch.ceded = 0; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 940 | vcpu->arch.run_task = current; |
| 941 | vcpu->arch.kvm_run = kvm_run; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 942 | prev_state = vcpu->arch.state; |
| 943 | vcpu->arch.state = KVMPPC_VCPU_RUNNABLE; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 944 | list_add_tail(&vcpu->arch.run_list, &vc->runnable_threads); |
| 945 | ++vc->n_runnable; |
| 946 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 947 | /* |
| 948 | * This happens the first time this is called for a vcpu. |
| 949 | * If the vcore is already running, we may be able to start |
| 950 | * this thread straight away and have it join in. |
| 951 | */ |
| 952 | if (prev_state == KVMPPC_VCPU_STOPPED) { |
| 953 | if (vc->vcore_state == VCORE_RUNNING && |
| 954 | VCORE_EXIT_COUNT(vc) == 0) { |
| 955 | vcpu->arch.ptid = vc->n_runnable - 1; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 956 | kvmppc_start_thread(vcpu); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 957 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 958 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 959 | } else if (prev_state == KVMPPC_VCPU_BUSY_IN_HOST) |
| 960 | --vc->n_busy; |
| 961 | |
| 962 | while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && |
| 963 | !signal_pending(current)) { |
| 964 | if (vc->n_busy || vc->vcore_state != VCORE_INACTIVE) { |
| 965 | spin_unlock(&vc->lock); |
| 966 | kvmppc_wait_for_exec(vcpu, TASK_INTERRUPTIBLE); |
| 967 | spin_lock(&vc->lock); |
| 968 | continue; |
| 969 | } |
| 970 | n_ceded = 0; |
| 971 | list_for_each_entry(v, &vc->runnable_threads, arch.run_list) |
| 972 | n_ceded += v->arch.ceded; |
| 973 | if (n_ceded == vc->n_runnable) |
| 974 | kvmppc_vcore_blocked(vc); |
| 975 | else |
| 976 | kvmppc_run_core(vc); |
| 977 | |
| 978 | list_for_each_entry_safe(v, vn, &vc->runnable_threads, |
| 979 | arch.run_list) { |
Scott Wood | 7e28e60e | 2011-11-08 18:23:20 -0600 | [diff] [blame] | 980 | kvmppc_core_prepare_to_enter(v); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 981 | if (signal_pending(v->arch.run_task)) { |
| 982 | kvmppc_remove_runnable(vc, v); |
| 983 | v->stat.signal_exits++; |
| 984 | v->arch.kvm_run->exit_reason = KVM_EXIT_INTR; |
| 985 | v->arch.ret = -EINTR; |
| 986 | wake_up(&v->arch.cpu_run); |
| 987 | } |
| 988 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 989 | } |
| 990 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 991 | if (signal_pending(current)) { |
| 992 | if (vc->vcore_state == VCORE_RUNNING || |
| 993 | vc->vcore_state == VCORE_EXITING) { |
| 994 | spin_unlock(&vc->lock); |
| 995 | kvmppc_wait_for_exec(vcpu, TASK_UNINTERRUPTIBLE); |
| 996 | spin_lock(&vc->lock); |
| 997 | } |
| 998 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) { |
| 999 | kvmppc_remove_runnable(vc, vcpu); |
| 1000 | vcpu->stat.signal_exits++; |
| 1001 | kvm_run->exit_reason = KVM_EXIT_INTR; |
| 1002 | vcpu->arch.ret = -EINTR; |
| 1003 | } |
| 1004 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1005 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1006 | spin_unlock(&vc->lock); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 1007 | return vcpu->arch.ret; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1008 | } |
| 1009 | |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 1010 | int kvmppc_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu) |
| 1011 | { |
| 1012 | int r; |
| 1013 | |
Alexander Graf | af8f38b | 2011-08-10 13:57:08 +0200 | [diff] [blame] | 1014 | if (!vcpu->arch.sane) { |
| 1015 | run->exit_reason = KVM_EXIT_INTERNAL_ERROR; |
| 1016 | return -EINVAL; |
| 1017 | } |
| 1018 | |
Scott Wood | 25051b5 | 2011-11-08 18:23:23 -0600 | [diff] [blame] | 1019 | kvmppc_core_prepare_to_enter(vcpu); |
| 1020 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1021 | /* No need to go into the guest when all we'll do is come back out */ |
| 1022 | if (signal_pending(current)) { |
| 1023 | run->exit_reason = KVM_EXIT_INTR; |
| 1024 | return -EINTR; |
| 1025 | } |
| 1026 | |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1027 | /* On the first time here, set up VRMA or RMA */ |
| 1028 | if (!vcpu->kvm->arch.rma_setup_done) { |
| 1029 | r = kvmppc_hv_setup_rma(vcpu); |
| 1030 | if (r) |
| 1031 | return r; |
| 1032 | } |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1033 | |
| 1034 | flush_fp_to_thread(current); |
| 1035 | flush_altivec_to_thread(current); |
| 1036 | flush_vsx_to_thread(current); |
| 1037 | vcpu->arch.wqp = &vcpu->arch.vcore->wq; |
Paul Mackerras | 342d3db | 2011-12-12 12:38:05 +0000 | [diff] [blame] | 1038 | vcpu->arch.pgdir = current->mm->pgd; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 1039 | |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 1040 | do { |
| 1041 | r = kvmppc_run_vcpu(run, vcpu); |
| 1042 | |
| 1043 | if (run->exit_reason == KVM_EXIT_PAPR_HCALL && |
| 1044 | !(vcpu->arch.shregs.msr & MSR_PR)) { |
| 1045 | r = kvmppc_pseries_do_hcall(vcpu); |
Scott Wood | 7e28e60e | 2011-11-08 18:23:20 -0600 | [diff] [blame] | 1046 | kvmppc_core_prepare_to_enter(vcpu); |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 1047 | } |
| 1048 | } while (r == RESUME_GUEST); |
| 1049 | return r; |
| 1050 | } |
| 1051 | |
David Gibson | 54738c0 | 2011-06-29 00:22:41 +0000 | [diff] [blame] | 1052 | static long kvmppc_stt_npages(unsigned long window_size) |
| 1053 | { |
| 1054 | return ALIGN((window_size >> SPAPR_TCE_SHIFT) |
| 1055 | * sizeof(u64), PAGE_SIZE) / PAGE_SIZE; |
| 1056 | } |
| 1057 | |
| 1058 | static void release_spapr_tce_table(struct kvmppc_spapr_tce_table *stt) |
| 1059 | { |
| 1060 | struct kvm *kvm = stt->kvm; |
| 1061 | int i; |
| 1062 | |
| 1063 | mutex_lock(&kvm->lock); |
| 1064 | list_del(&stt->list); |
| 1065 | for (i = 0; i < kvmppc_stt_npages(stt->window_size); i++) |
| 1066 | __free_page(stt->pages[i]); |
| 1067 | kfree(stt); |
| 1068 | mutex_unlock(&kvm->lock); |
| 1069 | |
| 1070 | kvm_put_kvm(kvm); |
| 1071 | } |
| 1072 | |
| 1073 | static int kvm_spapr_tce_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
| 1074 | { |
| 1075 | struct kvmppc_spapr_tce_table *stt = vma->vm_file->private_data; |
| 1076 | struct page *page; |
| 1077 | |
| 1078 | if (vmf->pgoff >= kvmppc_stt_npages(stt->window_size)) |
| 1079 | return VM_FAULT_SIGBUS; |
| 1080 | |
| 1081 | page = stt->pages[vmf->pgoff]; |
| 1082 | get_page(page); |
| 1083 | vmf->page = page; |
| 1084 | return 0; |
| 1085 | } |
| 1086 | |
| 1087 | static const struct vm_operations_struct kvm_spapr_tce_vm_ops = { |
| 1088 | .fault = kvm_spapr_tce_fault, |
| 1089 | }; |
| 1090 | |
| 1091 | static int kvm_spapr_tce_mmap(struct file *file, struct vm_area_struct *vma) |
| 1092 | { |
| 1093 | vma->vm_ops = &kvm_spapr_tce_vm_ops; |
| 1094 | return 0; |
| 1095 | } |
| 1096 | |
| 1097 | static int kvm_spapr_tce_release(struct inode *inode, struct file *filp) |
| 1098 | { |
| 1099 | struct kvmppc_spapr_tce_table *stt = filp->private_data; |
| 1100 | |
| 1101 | release_spapr_tce_table(stt); |
| 1102 | return 0; |
| 1103 | } |
| 1104 | |
| 1105 | static struct file_operations kvm_spapr_tce_fops = { |
| 1106 | .mmap = kvm_spapr_tce_mmap, |
| 1107 | .release = kvm_spapr_tce_release, |
| 1108 | }; |
| 1109 | |
| 1110 | long kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm, |
| 1111 | struct kvm_create_spapr_tce *args) |
| 1112 | { |
| 1113 | struct kvmppc_spapr_tce_table *stt = NULL; |
| 1114 | long npages; |
| 1115 | int ret = -ENOMEM; |
| 1116 | int i; |
| 1117 | |
| 1118 | /* Check this LIOBN hasn't been previously allocated */ |
| 1119 | list_for_each_entry(stt, &kvm->arch.spapr_tce_tables, list) { |
| 1120 | if (stt->liobn == args->liobn) |
| 1121 | return -EBUSY; |
| 1122 | } |
| 1123 | |
| 1124 | npages = kvmppc_stt_npages(args->window_size); |
| 1125 | |
| 1126 | stt = kzalloc(sizeof(*stt) + npages* sizeof(struct page *), |
| 1127 | GFP_KERNEL); |
| 1128 | if (!stt) |
| 1129 | goto fail; |
| 1130 | |
| 1131 | stt->liobn = args->liobn; |
| 1132 | stt->window_size = args->window_size; |
| 1133 | stt->kvm = kvm; |
| 1134 | |
| 1135 | for (i = 0; i < npages; i++) { |
| 1136 | stt->pages[i] = alloc_page(GFP_KERNEL | __GFP_ZERO); |
| 1137 | if (!stt->pages[i]) |
| 1138 | goto fail; |
| 1139 | } |
| 1140 | |
| 1141 | kvm_get_kvm(kvm); |
| 1142 | |
| 1143 | mutex_lock(&kvm->lock); |
| 1144 | list_add(&stt->list, &kvm->arch.spapr_tce_tables); |
| 1145 | |
| 1146 | mutex_unlock(&kvm->lock); |
| 1147 | |
| 1148 | return anon_inode_getfd("kvm-spapr-tce", &kvm_spapr_tce_fops, |
| 1149 | stt, O_RDWR); |
| 1150 | |
| 1151 | fail: |
| 1152 | if (stt) { |
| 1153 | for (i = 0; i < npages; i++) |
| 1154 | if (stt->pages[i]) |
| 1155 | __free_page(stt->pages[i]); |
| 1156 | |
| 1157 | kfree(stt); |
| 1158 | } |
| 1159 | return ret; |
| 1160 | } |
| 1161 | |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1162 | /* 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] | 1163 | Assumes POWER7 or PPC970. */ |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1164 | static inline int lpcr_rmls(unsigned long rma_size) |
| 1165 | { |
| 1166 | switch (rma_size) { |
| 1167 | case 32ul << 20: /* 32 MB */ |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 1168 | if (cpu_has_feature(CPU_FTR_ARCH_206)) |
| 1169 | return 8; /* only supported on POWER7 */ |
| 1170 | return -1; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1171 | case 64ul << 20: /* 64 MB */ |
| 1172 | return 3; |
| 1173 | case 128ul << 20: /* 128 MB */ |
| 1174 | return 7; |
| 1175 | case 256ul << 20: /* 256 MB */ |
| 1176 | return 4; |
| 1177 | case 1ul << 30: /* 1 GB */ |
| 1178 | return 2; |
| 1179 | case 16ul << 30: /* 16 GB */ |
| 1180 | return 1; |
| 1181 | case 256ul << 30: /* 256 GB */ |
| 1182 | return 0; |
| 1183 | default: |
| 1184 | return -1; |
| 1185 | } |
| 1186 | } |
| 1187 | |
| 1188 | static int kvm_rma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
| 1189 | { |
Alexander Graf | b4e7061 | 2012-01-16 16:50:10 +0100 | [diff] [blame] | 1190 | struct kvmppc_linear_info *ri = vma->vm_file->private_data; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1191 | struct page *page; |
| 1192 | |
| 1193 | if (vmf->pgoff >= ri->npages) |
| 1194 | return VM_FAULT_SIGBUS; |
| 1195 | |
| 1196 | page = pfn_to_page(ri->base_pfn + vmf->pgoff); |
| 1197 | get_page(page); |
| 1198 | vmf->page = page; |
| 1199 | return 0; |
| 1200 | } |
| 1201 | |
| 1202 | static const struct vm_operations_struct kvm_rma_vm_ops = { |
| 1203 | .fault = kvm_rma_fault, |
| 1204 | }; |
| 1205 | |
| 1206 | static int kvm_rma_mmap(struct file *file, struct vm_area_struct *vma) |
| 1207 | { |
| 1208 | vma->vm_flags |= VM_RESERVED; |
| 1209 | vma->vm_ops = &kvm_rma_vm_ops; |
| 1210 | return 0; |
| 1211 | } |
| 1212 | |
| 1213 | static int kvm_rma_release(struct inode *inode, struct file *filp) |
| 1214 | { |
Alexander Graf | b4e7061 | 2012-01-16 16:50:10 +0100 | [diff] [blame] | 1215 | struct kvmppc_linear_info *ri = filp->private_data; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1216 | |
| 1217 | kvm_release_rma(ri); |
| 1218 | return 0; |
| 1219 | } |
| 1220 | |
| 1221 | static struct file_operations kvm_rma_fops = { |
| 1222 | .mmap = kvm_rma_mmap, |
| 1223 | .release = kvm_rma_release, |
| 1224 | }; |
| 1225 | |
| 1226 | long kvm_vm_ioctl_allocate_rma(struct kvm *kvm, struct kvm_allocate_rma *ret) |
| 1227 | { |
Alexander Graf | b4e7061 | 2012-01-16 16:50:10 +0100 | [diff] [blame] | 1228 | struct kvmppc_linear_info *ri; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1229 | long fd; |
| 1230 | |
| 1231 | ri = kvm_alloc_rma(); |
| 1232 | if (!ri) |
| 1233 | return -ENOMEM; |
| 1234 | |
| 1235 | fd = anon_inode_getfd("kvm-rma", &kvm_rma_fops, ri, O_RDWR); |
| 1236 | if (fd < 0) |
| 1237 | kvm_release_rma(ri); |
| 1238 | |
| 1239 | ret->rma_size = ri->npages << PAGE_SHIFT; |
| 1240 | return fd; |
| 1241 | } |
| 1242 | |
Paul Mackerras | 82ed361 | 2011-12-15 02:03:22 +0000 | [diff] [blame] | 1243 | /* |
| 1244 | * Get (and clear) the dirty memory log for a memory slot. |
| 1245 | */ |
| 1246 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) |
| 1247 | { |
| 1248 | struct kvm_memory_slot *memslot; |
| 1249 | int r; |
| 1250 | unsigned long n; |
| 1251 | |
| 1252 | mutex_lock(&kvm->slots_lock); |
| 1253 | |
| 1254 | r = -EINVAL; |
| 1255 | if (log->slot >= KVM_MEMORY_SLOTS) |
| 1256 | goto out; |
| 1257 | |
| 1258 | memslot = id_to_memslot(kvm->memslots, log->slot); |
| 1259 | r = -ENOENT; |
| 1260 | if (!memslot->dirty_bitmap) |
| 1261 | goto out; |
| 1262 | |
| 1263 | n = kvm_dirty_bitmap_bytes(memslot); |
| 1264 | memset(memslot->dirty_bitmap, 0, n); |
| 1265 | |
| 1266 | r = kvmppc_hv_get_dirty_log(kvm, memslot); |
| 1267 | if (r) |
| 1268 | goto out; |
| 1269 | |
| 1270 | r = -EFAULT; |
| 1271 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) |
| 1272 | goto out; |
| 1273 | |
| 1274 | r = 0; |
| 1275 | out: |
| 1276 | mutex_unlock(&kvm->slots_lock); |
| 1277 | return r; |
| 1278 | } |
| 1279 | |
Paul Mackerras | da9d1d7 | 2011-12-12 12:31:41 +0000 | [diff] [blame] | 1280 | static unsigned long slb_pgsize_encoding(unsigned long psize) |
| 1281 | { |
| 1282 | unsigned long senc = 0; |
| 1283 | |
| 1284 | if (psize > 0x1000) { |
| 1285 | senc = SLB_VSID_L; |
| 1286 | if (psize == 0x10000) |
| 1287 | senc |= SLB_VSID_LP_01; |
| 1288 | } |
| 1289 | return senc; |
| 1290 | } |
| 1291 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1292 | int kvmppc_core_prepare_memory_region(struct kvm *kvm, |
| 1293 | struct kvm_userspace_memory_region *mem) |
| 1294 | { |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1295 | unsigned long npages; |
Paul Mackerras | b2b2f16 | 2011-12-12 12:28:21 +0000 | [diff] [blame] | 1296 | unsigned long *phys; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1297 | |
Paul Mackerras | b2b2f16 | 2011-12-12 12:28:21 +0000 | [diff] [blame] | 1298 | /* Allocate a slot_phys array */ |
Paul Mackerras | b2b2f16 | 2011-12-12 12:28:21 +0000 | [diff] [blame] | 1299 | phys = kvm->arch.slot_phys[mem->slot]; |
Paul Mackerras | 342d3db | 2011-12-12 12:38:05 +0000 | [diff] [blame] | 1300 | if (!kvm->arch.using_mmu_notifiers && !phys) { |
| 1301 | npages = mem->memory_size >> PAGE_SHIFT; |
Paul Mackerras | b2b2f16 | 2011-12-12 12:28:21 +0000 | [diff] [blame] | 1302 | phys = vzalloc(npages * sizeof(unsigned long)); |
| 1303 | if (!phys) |
| 1304 | return -ENOMEM; |
| 1305 | kvm->arch.slot_phys[mem->slot] = phys; |
| 1306 | kvm->arch.slot_npages[mem->slot] = npages; |
| 1307 | } |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1308 | |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1309 | return 0; |
| 1310 | } |
| 1311 | |
| 1312 | static void unpin_slot(struct kvm *kvm, int slot_id) |
| 1313 | { |
| 1314 | unsigned long *physp; |
| 1315 | unsigned long j, npages, pfn; |
| 1316 | struct page *page; |
| 1317 | |
| 1318 | physp = kvm->arch.slot_phys[slot_id]; |
| 1319 | npages = kvm->arch.slot_npages[slot_id]; |
| 1320 | if (physp) { |
| 1321 | spin_lock(&kvm->arch.slot_phys_lock); |
| 1322 | for (j = 0; j < npages; j++) { |
| 1323 | if (!(physp[j] & KVMPPC_GOT_PAGE)) |
| 1324 | continue; |
| 1325 | pfn = physp[j] >> PAGE_SHIFT; |
| 1326 | page = pfn_to_page(pfn); |
Paul Mackerras | da9d1d7 | 2011-12-12 12:31:41 +0000 | [diff] [blame] | 1327 | if (PageHuge(page)) |
| 1328 | page = compound_head(page); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1329 | SetPageDirty(page); |
| 1330 | put_page(page); |
| 1331 | } |
| 1332 | kvm->arch.slot_phys[slot_id] = NULL; |
| 1333 | spin_unlock(&kvm->arch.slot_phys_lock); |
| 1334 | vfree(physp); |
| 1335 | } |
| 1336 | } |
| 1337 | |
| 1338 | void kvmppc_core_commit_memory_region(struct kvm *kvm, |
| 1339 | struct kvm_userspace_memory_region *mem) |
| 1340 | { |
| 1341 | } |
| 1342 | |
| 1343 | static int kvmppc_hv_setup_rma(struct kvm_vcpu *vcpu) |
| 1344 | { |
| 1345 | int err = 0; |
| 1346 | struct kvm *kvm = vcpu->kvm; |
Alexander Graf | b4e7061 | 2012-01-16 16:50:10 +0100 | [diff] [blame] | 1347 | struct kvmppc_linear_info *ri = NULL; |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1348 | unsigned long hva; |
| 1349 | struct kvm_memory_slot *memslot; |
| 1350 | struct vm_area_struct *vma; |
Paul Mackerras | da9d1d7 | 2011-12-12 12:31:41 +0000 | [diff] [blame] | 1351 | unsigned long lpcr, senc; |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1352 | unsigned long psize, porder; |
| 1353 | unsigned long rma_size; |
| 1354 | unsigned long rmls; |
| 1355 | unsigned long *physp; |
Paul Mackerras | da9d1d7 | 2011-12-12 12:31:41 +0000 | [diff] [blame] | 1356 | unsigned long i, npages; |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1357 | |
| 1358 | mutex_lock(&kvm->lock); |
| 1359 | if (kvm->arch.rma_setup_done) |
| 1360 | goto out; /* another vcpu beat us to it */ |
| 1361 | |
| 1362 | /* Look up the memslot for guest physical address 0 */ |
| 1363 | memslot = gfn_to_memslot(kvm, 0); |
| 1364 | |
| 1365 | /* We must have some memory at 0 by now */ |
| 1366 | err = -EINVAL; |
| 1367 | if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) |
| 1368 | goto out; |
| 1369 | |
| 1370 | /* Look up the VMA for the start of this memory slot */ |
| 1371 | hva = memslot->userspace_addr; |
| 1372 | down_read(¤t->mm->mmap_sem); |
| 1373 | vma = find_vma(current->mm, hva); |
| 1374 | if (!vma || vma->vm_start > hva || (vma->vm_flags & VM_IO)) |
| 1375 | goto up_out; |
| 1376 | |
| 1377 | psize = vma_kernel_pagesize(vma); |
Paul Mackerras | da9d1d7 | 2011-12-12 12:31:41 +0000 | [diff] [blame] | 1378 | porder = __ilog2(psize); |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1379 | |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1380 | /* Is this one of our preallocated RMAs? */ |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1381 | if (vma->vm_file && vma->vm_file->f_op == &kvm_rma_fops && |
| 1382 | hva == vma->vm_start) |
| 1383 | ri = vma->vm_file->private_data; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1384 | |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1385 | up_read(¤t->mm->mmap_sem); |
| 1386 | |
| 1387 | if (!ri) { |
| 1388 | /* On POWER7, use VRMA; on PPC970, give up */ |
| 1389 | err = -EPERM; |
| 1390 | if (cpu_has_feature(CPU_FTR_ARCH_201)) { |
| 1391 | pr_err("KVM: CPU requires an RMO\n"); |
| 1392 | goto out; |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 1393 | } |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1394 | |
Paul Mackerras | da9d1d7 | 2011-12-12 12:31:41 +0000 | [diff] [blame] | 1395 | /* We can handle 4k, 64k or 16M pages in the VRMA */ |
| 1396 | err = -EINVAL; |
| 1397 | if (!(psize == 0x1000 || psize == 0x10000 || |
| 1398 | psize == 0x1000000)) |
| 1399 | goto out; |
| 1400 | |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1401 | /* Update VRMASD field in the LPCR */ |
Paul Mackerras | da9d1d7 | 2011-12-12 12:31:41 +0000 | [diff] [blame] | 1402 | senc = slb_pgsize_encoding(psize); |
Paul Mackerras | 697d389 | 2011-12-12 12:36:37 +0000 | [diff] [blame] | 1403 | kvm->arch.vrma_slb_v = senc | SLB_VSID_B_1T | |
| 1404 | (VRMA_VSID << SLB_VSID_SHIFT_1T); |
Paul Mackerras | da9d1d7 | 2011-12-12 12:31:41 +0000 | [diff] [blame] | 1405 | lpcr = kvm->arch.lpcr & ~LPCR_VRMASD; |
| 1406 | lpcr |= senc << (LPCR_VRMASD_SH - 4); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1407 | kvm->arch.lpcr = lpcr; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1408 | |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1409 | /* Create HPTEs in the hash page table for the VRMA */ |
Paul Mackerras | da9d1d7 | 2011-12-12 12:31:41 +0000 | [diff] [blame] | 1410 | kvmppc_map_vrma(vcpu, memslot, porder); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1411 | |
| 1412 | } else { |
| 1413 | /* Set up to use an RMO region */ |
| 1414 | rma_size = ri->npages; |
| 1415 | if (rma_size > memslot->npages) |
| 1416 | rma_size = memslot->npages; |
| 1417 | rma_size <<= PAGE_SHIFT; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1418 | rmls = lpcr_rmls(rma_size); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1419 | err = -EINVAL; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1420 | if (rmls < 0) { |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1421 | pr_err("KVM: Can't use RMA of 0x%lx bytes\n", rma_size); |
| 1422 | goto out; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1423 | } |
| 1424 | atomic_inc(&ri->use_count); |
| 1425 | kvm->arch.rma = ri; |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 1426 | |
| 1427 | /* Update LPCR and RMOR */ |
| 1428 | lpcr = kvm->arch.lpcr; |
| 1429 | if (cpu_has_feature(CPU_FTR_ARCH_201)) { |
| 1430 | /* PPC970; insert RMLS value (split field) in HID4 */ |
| 1431 | lpcr &= ~((1ul << HID4_RMLS0_SH) | |
| 1432 | (3ul << HID4_RMLS2_SH)); |
| 1433 | lpcr |= ((rmls >> 2) << HID4_RMLS0_SH) | |
| 1434 | ((rmls & 3) << HID4_RMLS2_SH); |
| 1435 | /* RMOR is also in HID4 */ |
| 1436 | lpcr |= ((ri->base_pfn >> (26 - PAGE_SHIFT)) & 0xffff) |
| 1437 | << HID4_RMOR_SH; |
| 1438 | } else { |
| 1439 | /* POWER7 */ |
| 1440 | lpcr &= ~(LPCR_VPM0 | LPCR_VRMA_L); |
| 1441 | lpcr |= rmls << LPCR_RMLS_SH; |
| 1442 | kvm->arch.rmor = kvm->arch.rma->base_pfn << PAGE_SHIFT; |
| 1443 | } |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1444 | kvm->arch.lpcr = lpcr; |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1445 | pr_info("KVM: Using RMO at %lx size %lx (LPCR = %lx)\n", |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1446 | ri->base_pfn << PAGE_SHIFT, rma_size, lpcr); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1447 | |
| 1448 | /* Initialize phys addrs of pages in RMO */ |
Paul Mackerras | da9d1d7 | 2011-12-12 12:31:41 +0000 | [diff] [blame] | 1449 | npages = ri->npages; |
| 1450 | porder = __ilog2(npages); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1451 | physp = kvm->arch.slot_phys[memslot->id]; |
| 1452 | spin_lock(&kvm->arch.slot_phys_lock); |
| 1453 | for (i = 0; i < npages; ++i) |
Paul Mackerras | da9d1d7 | 2011-12-12 12:31:41 +0000 | [diff] [blame] | 1454 | physp[i] = ((ri->base_pfn + i) << PAGE_SHIFT) + porder; |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1455 | spin_unlock(&kvm->arch.slot_phys_lock); |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1456 | } |
| 1457 | |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1458 | /* Order updates to kvm->arch.lpcr etc. vs. rma_setup_done */ |
| 1459 | smp_wmb(); |
| 1460 | kvm->arch.rma_setup_done = 1; |
| 1461 | err = 0; |
| 1462 | out: |
| 1463 | mutex_unlock(&kvm->lock); |
| 1464 | return err; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1465 | |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1466 | up_out: |
| 1467 | up_read(¤t->mm->mmap_sem); |
| 1468 | goto out; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1469 | } |
| 1470 | |
| 1471 | int kvmppc_core_init_vm(struct kvm *kvm) |
| 1472 | { |
| 1473 | long r; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1474 | unsigned long lpcr; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1475 | |
| 1476 | /* Allocate hashed page table */ |
| 1477 | r = kvmppc_alloc_hpt(kvm); |
David Gibson | 54738c0 | 2011-06-29 00:22:41 +0000 | [diff] [blame] | 1478 | if (r) |
| 1479 | return r; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1480 | |
David Gibson | 54738c0 | 2011-06-29 00:22:41 +0000 | [diff] [blame] | 1481 | INIT_LIST_HEAD(&kvm->arch.spapr_tce_tables); |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1482 | |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1483 | kvm->arch.rma = NULL; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1484 | |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 1485 | kvm->arch.host_sdr1 = mfspr(SPRN_SDR1); |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1486 | |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 1487 | if (cpu_has_feature(CPU_FTR_ARCH_201)) { |
| 1488 | /* PPC970; HID4 is effectively the LPCR */ |
| 1489 | unsigned long lpid = kvm->arch.lpid; |
| 1490 | kvm->arch.host_lpid = 0; |
| 1491 | kvm->arch.host_lpcr = lpcr = mfspr(SPRN_HID4); |
| 1492 | lpcr &= ~((3 << HID4_LPID1_SH) | (0xful << HID4_LPID5_SH)); |
| 1493 | lpcr |= ((lpid >> 4) << HID4_LPID1_SH) | |
| 1494 | ((lpid & 0xf) << HID4_LPID5_SH); |
| 1495 | } else { |
| 1496 | /* POWER7; init LPCR for virtual RMA mode */ |
| 1497 | kvm->arch.host_lpid = mfspr(SPRN_LPID); |
| 1498 | kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR); |
| 1499 | lpcr &= LPCR_PECE | LPCR_LPES; |
| 1500 | lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE | |
Paul Mackerras | 697d389 | 2011-12-12 12:36:37 +0000 | [diff] [blame] | 1501 | LPCR_VPM0 | LPCR_VPM1; |
| 1502 | kvm->arch.vrma_slb_v = SLB_VSID_B_1T | |
| 1503 | (VRMA_VSID << SLB_VSID_SHIFT_1T); |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 1504 | } |
| 1505 | kvm->arch.lpcr = lpcr; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1506 | |
Paul Mackerras | 342d3db | 2011-12-12 12:38:05 +0000 | [diff] [blame] | 1507 | kvm->arch.using_mmu_notifiers = !!cpu_has_feature(CPU_FTR_ARCH_206); |
Paul Mackerras | c77162d | 2011-12-12 12:31:00 +0000 | [diff] [blame] | 1508 | spin_lock_init(&kvm->arch.slot_phys_lock); |
David Gibson | 54738c0 | 2011-06-29 00:22:41 +0000 | [diff] [blame] | 1509 | return 0; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1510 | } |
| 1511 | |
| 1512 | void kvmppc_core_destroy_vm(struct kvm *kvm) |
| 1513 | { |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1514 | unsigned long i; |
| 1515 | |
Paul Mackerras | 342d3db | 2011-12-12 12:38:05 +0000 | [diff] [blame] | 1516 | if (!kvm->arch.using_mmu_notifiers) |
| 1517 | for (i = 0; i < KVM_MEM_SLOTS_NUM; i++) |
| 1518 | unpin_slot(kvm, i); |
Paul Mackerras | b2b2f16 | 2011-12-12 12:28:21 +0000 | [diff] [blame] | 1519 | |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1520 | if (kvm->arch.rma) { |
| 1521 | kvm_release_rma(kvm->arch.rma); |
| 1522 | kvm->arch.rma = NULL; |
| 1523 | } |
| 1524 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1525 | kvmppc_free_hpt(kvm); |
David Gibson | 54738c0 | 2011-06-29 00:22:41 +0000 | [diff] [blame] | 1526 | WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables)); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1527 | } |
| 1528 | |
| 1529 | /* These are stubs for now */ |
| 1530 | void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end) |
| 1531 | { |
| 1532 | } |
| 1533 | |
| 1534 | /* We don't need to emulate any privileged instructions or dcbz */ |
| 1535 | int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu, |
| 1536 | unsigned int inst, int *advance) |
| 1537 | { |
| 1538 | return EMULATE_FAIL; |
| 1539 | } |
| 1540 | |
| 1541 | int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs) |
| 1542 | { |
| 1543 | return EMULATE_FAIL; |
| 1544 | } |
| 1545 | |
| 1546 | int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt) |
| 1547 | { |
| 1548 | return EMULATE_FAIL; |
| 1549 | } |
| 1550 | |
| 1551 | static int kvmppc_book3s_hv_init(void) |
| 1552 | { |
| 1553 | int r; |
| 1554 | |
| 1555 | r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
| 1556 | |
| 1557 | if (r) |
| 1558 | return r; |
| 1559 | |
| 1560 | r = kvmppc_mmu_hv_init(); |
| 1561 | |
| 1562 | return r; |
| 1563 | } |
| 1564 | |
| 1565 | static void kvmppc_book3s_hv_exit(void) |
| 1566 | { |
| 1567 | kvm_exit(); |
| 1568 | } |
| 1569 | |
| 1570 | module_init(kvmppc_book3s_hv_init); |
| 1571 | module_exit(kvmppc_book3s_hv_exit); |