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> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 48 | #include <linux/gfp.h> |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 49 | #include <linux/vmalloc.h> |
| 50 | #include <linux/highmem.h> |
| 51 | |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 52 | /* |
| 53 | * For now, limit memory to 64GB and require it to be large pages. |
| 54 | * This value is chosen because it makes the ram_pginfo array be |
| 55 | * 64kB in size, which is about as large as we want to be trying |
| 56 | * to allocate with kmalloc. |
| 57 | */ |
| 58 | #define MAX_MEM_ORDER 36 |
| 59 | |
| 60 | #define LARGE_PAGE_ORDER 24 /* 16MB pages */ |
| 61 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 62 | /* #define EXIT_DEBUG */ |
| 63 | /* #define EXIT_DEBUG_SIMPLE */ |
| 64 | /* #define EXIT_DEBUG_INT */ |
| 65 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 66 | static void kvmppc_end_cede(struct kvm_vcpu *vcpu); |
| 67 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 68 | void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
| 69 | { |
| 70 | local_paca->kvm_hstate.kvm_vcpu = vcpu; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 71 | local_paca->kvm_hstate.kvm_vcore = vcpu->arch.vcore; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 72 | } |
| 73 | |
| 74 | void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu) |
| 75 | { |
| 76 | } |
| 77 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 78 | void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr) |
| 79 | { |
| 80 | vcpu->arch.shregs.msr = msr; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 81 | kvmppc_end_cede(vcpu); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 82 | } |
| 83 | |
| 84 | void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr) |
| 85 | { |
| 86 | vcpu->arch.pvr = pvr; |
| 87 | } |
| 88 | |
| 89 | void kvmppc_dump_regs(struct kvm_vcpu *vcpu) |
| 90 | { |
| 91 | int r; |
| 92 | |
| 93 | pr_err("vcpu %p (%d):\n", vcpu, vcpu->vcpu_id); |
| 94 | pr_err("pc = %.16lx msr = %.16llx trap = %x\n", |
| 95 | vcpu->arch.pc, vcpu->arch.shregs.msr, vcpu->arch.trap); |
| 96 | for (r = 0; r < 16; ++r) |
| 97 | pr_err("r%2d = %.16lx r%d = %.16lx\n", |
| 98 | r, kvmppc_get_gpr(vcpu, r), |
| 99 | r+16, kvmppc_get_gpr(vcpu, r+16)); |
| 100 | pr_err("ctr = %.16lx lr = %.16lx\n", |
| 101 | vcpu->arch.ctr, vcpu->arch.lr); |
| 102 | pr_err("srr0 = %.16llx srr1 = %.16llx\n", |
| 103 | vcpu->arch.shregs.srr0, vcpu->arch.shregs.srr1); |
| 104 | pr_err("sprg0 = %.16llx sprg1 = %.16llx\n", |
| 105 | vcpu->arch.shregs.sprg0, vcpu->arch.shregs.sprg1); |
| 106 | pr_err("sprg2 = %.16llx sprg3 = %.16llx\n", |
| 107 | vcpu->arch.shregs.sprg2, vcpu->arch.shregs.sprg3); |
| 108 | pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n", |
| 109 | vcpu->arch.cr, vcpu->arch.xer, vcpu->arch.shregs.dsisr); |
| 110 | pr_err("dar = %.16llx\n", vcpu->arch.shregs.dar); |
| 111 | pr_err("fault dar = %.16lx dsisr = %.8x\n", |
| 112 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); |
| 113 | pr_err("SLB (%d entries):\n", vcpu->arch.slb_max); |
| 114 | for (r = 0; r < vcpu->arch.slb_max; ++r) |
| 115 | pr_err(" ESID = %.16llx VSID = %.16llx\n", |
| 116 | vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv); |
| 117 | pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n", |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 118 | vcpu->kvm->arch.lpcr, vcpu->kvm->arch.sdr1, |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 119 | vcpu->arch.last_inst); |
| 120 | } |
| 121 | |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 122 | struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id) |
| 123 | { |
| 124 | int r; |
| 125 | struct kvm_vcpu *v, *ret = NULL; |
| 126 | |
| 127 | mutex_lock(&kvm->lock); |
| 128 | kvm_for_each_vcpu(r, v, kvm) { |
| 129 | if (v->vcpu_id == id) { |
| 130 | ret = v; |
| 131 | break; |
| 132 | } |
| 133 | } |
| 134 | mutex_unlock(&kvm->lock); |
| 135 | return ret; |
| 136 | } |
| 137 | |
| 138 | static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa) |
| 139 | { |
| 140 | vpa->shared_proc = 1; |
| 141 | vpa->yield_count = 1; |
| 142 | } |
| 143 | |
| 144 | static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu, |
| 145 | unsigned long flags, |
| 146 | unsigned long vcpuid, unsigned long vpa) |
| 147 | { |
| 148 | struct kvm *kvm = vcpu->kvm; |
| 149 | unsigned long pg_index, ra, len; |
| 150 | unsigned long pg_offset; |
| 151 | void *va; |
| 152 | struct kvm_vcpu *tvcpu; |
| 153 | |
| 154 | tvcpu = kvmppc_find_vcpu(kvm, vcpuid); |
| 155 | if (!tvcpu) |
| 156 | return H_PARAMETER; |
| 157 | |
| 158 | flags >>= 63 - 18; |
| 159 | flags &= 7; |
| 160 | if (flags == 0 || flags == 4) |
| 161 | return H_PARAMETER; |
| 162 | if (flags < 4) { |
| 163 | if (vpa & 0x7f) |
| 164 | return H_PARAMETER; |
| 165 | /* registering new area; convert logical addr to real */ |
| 166 | pg_index = vpa >> kvm->arch.ram_porder; |
| 167 | pg_offset = vpa & (kvm->arch.ram_psize - 1); |
| 168 | if (pg_index >= kvm->arch.ram_npages) |
| 169 | return H_PARAMETER; |
| 170 | if (kvm->arch.ram_pginfo[pg_index].pfn == 0) |
| 171 | return H_PARAMETER; |
| 172 | ra = kvm->arch.ram_pginfo[pg_index].pfn << PAGE_SHIFT; |
| 173 | ra |= pg_offset; |
| 174 | va = __va(ra); |
| 175 | if (flags <= 1) |
| 176 | len = *(unsigned short *)(va + 4); |
| 177 | else |
| 178 | len = *(unsigned int *)(va + 4); |
| 179 | if (pg_offset + len > kvm->arch.ram_psize) |
| 180 | return H_PARAMETER; |
| 181 | switch (flags) { |
| 182 | case 1: /* register VPA */ |
| 183 | if (len < 640) |
| 184 | return H_PARAMETER; |
| 185 | tvcpu->arch.vpa = va; |
| 186 | init_vpa(vcpu, va); |
| 187 | break; |
| 188 | case 2: /* register DTL */ |
| 189 | if (len < 48) |
| 190 | return H_PARAMETER; |
| 191 | if (!tvcpu->arch.vpa) |
| 192 | return H_RESOURCE; |
| 193 | len -= len % 48; |
| 194 | tvcpu->arch.dtl = va; |
| 195 | tvcpu->arch.dtl_end = va + len; |
| 196 | break; |
| 197 | case 3: /* register SLB shadow buffer */ |
| 198 | if (len < 8) |
| 199 | return H_PARAMETER; |
| 200 | if (!tvcpu->arch.vpa) |
| 201 | return H_RESOURCE; |
| 202 | tvcpu->arch.slb_shadow = va; |
| 203 | len = (len - 16) / 16; |
| 204 | tvcpu->arch.slb_shadow = va; |
| 205 | break; |
| 206 | } |
| 207 | } else { |
| 208 | switch (flags) { |
| 209 | case 5: /* unregister VPA */ |
| 210 | if (tvcpu->arch.slb_shadow || tvcpu->arch.dtl) |
| 211 | return H_RESOURCE; |
| 212 | tvcpu->arch.vpa = NULL; |
| 213 | break; |
| 214 | case 6: /* unregister DTL */ |
| 215 | tvcpu->arch.dtl = NULL; |
| 216 | break; |
| 217 | case 7: /* unregister SLB shadow buffer */ |
| 218 | tvcpu->arch.slb_shadow = NULL; |
| 219 | break; |
| 220 | } |
| 221 | } |
| 222 | return H_SUCCESS; |
| 223 | } |
| 224 | |
| 225 | int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) |
| 226 | { |
| 227 | unsigned long req = kvmppc_get_gpr(vcpu, 3); |
| 228 | unsigned long target, ret = H_SUCCESS; |
| 229 | struct kvm_vcpu *tvcpu; |
| 230 | |
| 231 | switch (req) { |
| 232 | case H_CEDE: |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 233 | break; |
| 234 | case H_PROD: |
| 235 | target = kvmppc_get_gpr(vcpu, 4); |
| 236 | tvcpu = kvmppc_find_vcpu(vcpu->kvm, target); |
| 237 | if (!tvcpu) { |
| 238 | ret = H_PARAMETER; |
| 239 | break; |
| 240 | } |
| 241 | tvcpu->arch.prodded = 1; |
| 242 | smp_mb(); |
| 243 | if (vcpu->arch.ceded) { |
| 244 | if (waitqueue_active(&vcpu->wq)) { |
| 245 | wake_up_interruptible(&vcpu->wq); |
| 246 | vcpu->stat.halt_wakeup++; |
| 247 | } |
| 248 | } |
| 249 | break; |
| 250 | case H_CONFER: |
| 251 | break; |
| 252 | case H_REGISTER_VPA: |
| 253 | ret = do_h_register_vpa(vcpu, kvmppc_get_gpr(vcpu, 4), |
| 254 | kvmppc_get_gpr(vcpu, 5), |
| 255 | kvmppc_get_gpr(vcpu, 6)); |
| 256 | break; |
| 257 | default: |
| 258 | return RESUME_HOST; |
| 259 | } |
| 260 | kvmppc_set_gpr(vcpu, 3, ret); |
| 261 | vcpu->arch.hcall_needed = 0; |
| 262 | return RESUME_GUEST; |
| 263 | } |
| 264 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 265 | static int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, |
| 266 | struct task_struct *tsk) |
| 267 | { |
| 268 | int r = RESUME_HOST; |
| 269 | |
| 270 | vcpu->stat.sum_exits++; |
| 271 | |
| 272 | run->exit_reason = KVM_EXIT_UNKNOWN; |
| 273 | run->ready_for_interrupt_injection = 1; |
| 274 | switch (vcpu->arch.trap) { |
| 275 | /* We're good on these - the host merely wanted to get our attention */ |
| 276 | case BOOK3S_INTERRUPT_HV_DECREMENTER: |
| 277 | vcpu->stat.dec_exits++; |
| 278 | r = RESUME_GUEST; |
| 279 | break; |
| 280 | case BOOK3S_INTERRUPT_EXTERNAL: |
| 281 | vcpu->stat.ext_intr_exits++; |
| 282 | r = RESUME_GUEST; |
| 283 | break; |
| 284 | case BOOK3S_INTERRUPT_PERFMON: |
| 285 | r = RESUME_GUEST; |
| 286 | break; |
| 287 | case BOOK3S_INTERRUPT_PROGRAM: |
| 288 | { |
| 289 | ulong flags; |
| 290 | /* |
| 291 | * Normally program interrupts are delivered directly |
| 292 | * to the guest by the hardware, but we can get here |
| 293 | * as a result of a hypervisor emulation interrupt |
| 294 | * (e40) getting turned into a 700 by BML RTAS. |
| 295 | */ |
| 296 | flags = vcpu->arch.shregs.msr & 0x1f0000ull; |
| 297 | kvmppc_core_queue_program(vcpu, flags); |
| 298 | r = RESUME_GUEST; |
| 299 | break; |
| 300 | } |
| 301 | case BOOK3S_INTERRUPT_SYSCALL: |
| 302 | { |
| 303 | /* hcall - punt to userspace */ |
| 304 | int i; |
| 305 | |
| 306 | if (vcpu->arch.shregs.msr & MSR_PR) { |
| 307 | /* sc 1 from userspace - reflect to guest syscall */ |
| 308 | kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_SYSCALL); |
| 309 | r = RESUME_GUEST; |
| 310 | break; |
| 311 | } |
| 312 | run->papr_hcall.nr = kvmppc_get_gpr(vcpu, 3); |
| 313 | for (i = 0; i < 9; ++i) |
| 314 | run->papr_hcall.args[i] = kvmppc_get_gpr(vcpu, 4 + i); |
| 315 | run->exit_reason = KVM_EXIT_PAPR_HCALL; |
| 316 | vcpu->arch.hcall_needed = 1; |
| 317 | r = RESUME_HOST; |
| 318 | break; |
| 319 | } |
| 320 | /* |
| 321 | * We get these next two if the guest does a bad real-mode access, |
| 322 | * as we have enabled VRMA (virtualized real mode area) mode in the |
| 323 | * LPCR. We just generate an appropriate DSI/ISI to the guest. |
| 324 | */ |
| 325 | case BOOK3S_INTERRUPT_H_DATA_STORAGE: |
| 326 | vcpu->arch.shregs.dsisr = vcpu->arch.fault_dsisr; |
| 327 | vcpu->arch.shregs.dar = vcpu->arch.fault_dar; |
| 328 | kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE, 0); |
| 329 | r = RESUME_GUEST; |
| 330 | break; |
| 331 | case BOOK3S_INTERRUPT_H_INST_STORAGE: |
| 332 | kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_INST_STORAGE, |
| 333 | 0x08000000); |
| 334 | r = RESUME_GUEST; |
| 335 | break; |
| 336 | /* |
| 337 | * This occurs if the guest executes an illegal instruction. |
| 338 | * We just generate a program interrupt to the guest, since |
| 339 | * we don't emulate any guest instructions at this stage. |
| 340 | */ |
| 341 | case BOOK3S_INTERRUPT_H_EMUL_ASSIST: |
| 342 | kvmppc_core_queue_program(vcpu, 0x80000); |
| 343 | r = RESUME_GUEST; |
| 344 | break; |
| 345 | default: |
| 346 | kvmppc_dump_regs(vcpu); |
| 347 | printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n", |
| 348 | vcpu->arch.trap, kvmppc_get_pc(vcpu), |
| 349 | vcpu->arch.shregs.msr); |
| 350 | r = RESUME_HOST; |
| 351 | BUG(); |
| 352 | break; |
| 353 | } |
| 354 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 355 | return r; |
| 356 | } |
| 357 | |
| 358 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
| 359 | struct kvm_sregs *sregs) |
| 360 | { |
| 361 | int i; |
| 362 | |
| 363 | sregs->pvr = vcpu->arch.pvr; |
| 364 | |
| 365 | memset(sregs, 0, sizeof(struct kvm_sregs)); |
| 366 | for (i = 0; i < vcpu->arch.slb_max; i++) { |
| 367 | sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige; |
| 368 | sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv; |
| 369 | } |
| 370 | |
| 371 | return 0; |
| 372 | } |
| 373 | |
| 374 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
| 375 | struct kvm_sregs *sregs) |
| 376 | { |
| 377 | int i, j; |
| 378 | |
| 379 | kvmppc_set_pvr(vcpu, sregs->pvr); |
| 380 | |
| 381 | j = 0; |
| 382 | for (i = 0; i < vcpu->arch.slb_nr; i++) { |
| 383 | if (sregs->u.s.ppc64.slb[i].slbe & SLB_ESID_V) { |
| 384 | vcpu->arch.slb[j].orige = sregs->u.s.ppc64.slb[i].slbe; |
| 385 | vcpu->arch.slb[j].origv = sregs->u.s.ppc64.slb[i].slbv; |
| 386 | ++j; |
| 387 | } |
| 388 | } |
| 389 | vcpu->arch.slb_max = j; |
| 390 | |
| 391 | return 0; |
| 392 | } |
| 393 | |
| 394 | int kvmppc_core_check_processor_compat(void) |
| 395 | { |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 396 | if (cpu_has_feature(CPU_FTR_HVMODE)) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 397 | return 0; |
| 398 | return -EIO; |
| 399 | } |
| 400 | |
| 401 | struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id) |
| 402 | { |
| 403 | struct kvm_vcpu *vcpu; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 404 | int err = -EINVAL; |
| 405 | int core; |
| 406 | struct kvmppc_vcore *vcore; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 407 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 408 | core = id / threads_per_core; |
| 409 | if (core >= KVM_MAX_VCORES) |
| 410 | goto out; |
| 411 | |
| 412 | err = -ENOMEM; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 413 | vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL); |
| 414 | if (!vcpu) |
| 415 | goto out; |
| 416 | |
| 417 | err = kvm_vcpu_init(vcpu, kvm, id); |
| 418 | if (err) |
| 419 | goto free_vcpu; |
| 420 | |
| 421 | vcpu->arch.shared = &vcpu->arch.shregs; |
| 422 | vcpu->arch.last_cpu = -1; |
| 423 | vcpu->arch.mmcr[0] = MMCR0_FC; |
| 424 | vcpu->arch.ctrl = CTRL_RUNLATCH; |
| 425 | /* default to host PVR, since we can't spoof it */ |
| 426 | vcpu->arch.pvr = mfspr(SPRN_PVR); |
| 427 | kvmppc_set_pvr(vcpu, vcpu->arch.pvr); |
| 428 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 429 | kvmppc_mmu_book3s_hv_init(vcpu); |
| 430 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 431 | /* |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 432 | * 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] | 433 | */ |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 434 | vcpu->arch.state = KVMPPC_VCPU_STOPPED; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 435 | |
| 436 | init_waitqueue_head(&vcpu->arch.cpu_run); |
| 437 | |
| 438 | mutex_lock(&kvm->lock); |
| 439 | vcore = kvm->arch.vcores[core]; |
| 440 | if (!vcore) { |
| 441 | vcore = kzalloc(sizeof(struct kvmppc_vcore), GFP_KERNEL); |
| 442 | if (vcore) { |
| 443 | INIT_LIST_HEAD(&vcore->runnable_threads); |
| 444 | spin_lock_init(&vcore->lock); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 445 | init_waitqueue_head(&vcore->wq); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 446 | } |
| 447 | kvm->arch.vcores[core] = vcore; |
| 448 | } |
| 449 | mutex_unlock(&kvm->lock); |
| 450 | |
| 451 | if (!vcore) |
| 452 | goto free_vcpu; |
| 453 | |
| 454 | spin_lock(&vcore->lock); |
| 455 | ++vcore->num_threads; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 456 | spin_unlock(&vcore->lock); |
| 457 | vcpu->arch.vcore = vcore; |
| 458 | |
Alexander Graf | af8f38b | 2011-08-10 13:57:08 +0200 | [diff] [blame] | 459 | vcpu->arch.cpu_type = KVM_CPU_3S_64; |
| 460 | kvmppc_sanity_check(vcpu); |
| 461 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 462 | return vcpu; |
| 463 | |
| 464 | free_vcpu: |
| 465 | kfree(vcpu); |
| 466 | out: |
| 467 | return ERR_PTR(err); |
| 468 | } |
| 469 | |
| 470 | void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu) |
| 471 | { |
| 472 | kvm_vcpu_uninit(vcpu); |
| 473 | kfree(vcpu); |
| 474 | } |
| 475 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 476 | static void kvmppc_set_timer(struct kvm_vcpu *vcpu) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 477 | { |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 478 | unsigned long dec_nsec, now; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 479 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 480 | now = get_tb(); |
| 481 | if (now > vcpu->arch.dec_expires) { |
| 482 | /* decrementer has already gone negative */ |
| 483 | kvmppc_core_queue_dec(vcpu); |
| 484 | kvmppc_core_deliver_interrupts(vcpu); |
| 485 | return; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 486 | } |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 487 | dec_nsec = (vcpu->arch.dec_expires - now) * NSEC_PER_SEC |
| 488 | / tb_ticks_per_sec; |
| 489 | hrtimer_start(&vcpu->arch.dec_timer, ktime_set(0, dec_nsec), |
| 490 | HRTIMER_MODE_REL); |
| 491 | vcpu->arch.timer_running = 1; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 492 | } |
| 493 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 494 | static void kvmppc_end_cede(struct kvm_vcpu *vcpu) |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 495 | { |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 496 | vcpu->arch.ceded = 0; |
| 497 | if (vcpu->arch.timer_running) { |
| 498 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); |
| 499 | vcpu->arch.timer_running = 0; |
| 500 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 501 | } |
| 502 | |
| 503 | extern int __kvmppc_vcore_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu); |
| 504 | extern void xics_wake_cpu(int cpu); |
| 505 | |
| 506 | static void kvmppc_remove_runnable(struct kvmppc_vcore *vc, |
| 507 | struct kvm_vcpu *vcpu) |
| 508 | { |
| 509 | struct kvm_vcpu *v; |
| 510 | |
| 511 | if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) |
| 512 | return; |
| 513 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; |
| 514 | --vc->n_runnable; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 515 | ++vc->n_busy; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 516 | /* decrement the physical thread id of each following vcpu */ |
| 517 | v = vcpu; |
| 518 | list_for_each_entry_continue(v, &vc->runnable_threads, arch.run_list) |
| 519 | --v->arch.ptid; |
| 520 | list_del(&vcpu->arch.run_list); |
| 521 | } |
| 522 | |
| 523 | static void kvmppc_start_thread(struct kvm_vcpu *vcpu) |
| 524 | { |
| 525 | int cpu; |
| 526 | struct paca_struct *tpaca; |
| 527 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
| 528 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 529 | if (vcpu->arch.timer_running) { |
| 530 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); |
| 531 | vcpu->arch.timer_running = 0; |
| 532 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 533 | cpu = vc->pcpu + vcpu->arch.ptid; |
| 534 | tpaca = &paca[cpu]; |
| 535 | tpaca->kvm_hstate.kvm_vcpu = vcpu; |
| 536 | tpaca->kvm_hstate.kvm_vcore = vc; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 537 | tpaca->kvm_hstate.napping = 0; |
| 538 | vcpu->cpu = vc->pcpu; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 539 | smp_wmb(); |
Michael Neuling | 251da03 | 2011-11-10 16:03:20 +0000 | [diff] [blame] | 540 | #if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP) |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 541 | if (vcpu->arch.ptid) { |
| 542 | tpaca->cpu_start = 0x80; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 543 | wmb(); |
| 544 | xics_wake_cpu(cpu); |
| 545 | ++vc->n_woken; |
| 546 | } |
| 547 | #endif |
| 548 | } |
| 549 | |
| 550 | static void kvmppc_wait_for_nap(struct kvmppc_vcore *vc) |
| 551 | { |
| 552 | int i; |
| 553 | |
| 554 | HMT_low(); |
| 555 | i = 0; |
| 556 | while (vc->nap_count < vc->n_woken) { |
| 557 | if (++i >= 1000000) { |
| 558 | pr_err("kvmppc_wait_for_nap timeout %d %d\n", |
| 559 | vc->nap_count, vc->n_woken); |
| 560 | break; |
| 561 | } |
| 562 | cpu_relax(); |
| 563 | } |
| 564 | HMT_medium(); |
| 565 | } |
| 566 | |
| 567 | /* |
| 568 | * Check that we are on thread 0 and that any other threads in |
| 569 | * this core are off-line. |
| 570 | */ |
| 571 | static int on_primary_thread(void) |
| 572 | { |
| 573 | int cpu = smp_processor_id(); |
| 574 | int thr = cpu_thread_in_core(cpu); |
| 575 | |
| 576 | if (thr) |
| 577 | return 0; |
| 578 | while (++thr < threads_per_core) |
| 579 | if (cpu_online(cpu + thr)) |
| 580 | return 0; |
| 581 | return 1; |
| 582 | } |
| 583 | |
| 584 | /* |
| 585 | * Run a set of guest threads on a physical core. |
| 586 | * Called with vc->lock held. |
| 587 | */ |
| 588 | static int kvmppc_run_core(struct kvmppc_vcore *vc) |
| 589 | { |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 590 | struct kvm_vcpu *vcpu, *vcpu0, *vnext; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 591 | long ret; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 592 | u64 now; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 593 | int ptid; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 594 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 595 | /* don't start if any threads have a signal pending */ |
| 596 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) |
| 597 | if (signal_pending(vcpu->arch.run_task)) |
| 598 | return 0; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 599 | |
| 600 | /* |
| 601 | * Make sure we are running on thread 0, and that |
| 602 | * secondary threads are offline. |
| 603 | * XXX we should also block attempts to bring any |
| 604 | * secondary threads online. |
| 605 | */ |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 606 | if (threads_per_core > 1 && !on_primary_thread()) { |
| 607 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) |
| 608 | vcpu->arch.ret = -EBUSY; |
| 609 | goto out; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 610 | } |
| 611 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 612 | /* |
| 613 | * Assign physical thread IDs, first to non-ceded vcpus |
| 614 | * and then to ceded ones. |
| 615 | */ |
| 616 | ptid = 0; |
| 617 | vcpu0 = NULL; |
| 618 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { |
| 619 | if (!vcpu->arch.ceded) { |
| 620 | if (!ptid) |
| 621 | vcpu0 = vcpu; |
| 622 | vcpu->arch.ptid = ptid++; |
| 623 | } |
| 624 | } |
| 625 | if (!vcpu0) |
| 626 | return 0; /* nothing to run */ |
| 627 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) |
| 628 | if (vcpu->arch.ceded) |
| 629 | vcpu->arch.ptid = ptid++; |
| 630 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 631 | vc->n_woken = 0; |
| 632 | vc->nap_count = 0; |
| 633 | vc->entry_exit_count = 0; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 634 | vc->vcore_state = VCORE_RUNNING; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 635 | vc->in_guest = 0; |
| 636 | vc->pcpu = smp_processor_id(); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 637 | vc->napping_threads = 0; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 638 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) |
| 639 | kvmppc_start_thread(vcpu); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 640 | |
| 641 | preempt_disable(); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 642 | spin_unlock(&vc->lock); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 643 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 644 | kvm_guest_enter(); |
| 645 | __kvmppc_vcore_entry(NULL, vcpu0); |
| 646 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 647 | spin_lock(&vc->lock); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 648 | /* disable sending of IPIs on virtual external irqs */ |
| 649 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) |
| 650 | vcpu->cpu = -1; |
| 651 | /* wait for secondary threads to finish writing their state to memory */ |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 652 | if (vc->nap_count < vc->n_woken) |
| 653 | kvmppc_wait_for_nap(vc); |
| 654 | /* prevent other vcpu threads from doing kvmppc_start_thread() now */ |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 655 | vc->vcore_state = VCORE_EXITING; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 656 | spin_unlock(&vc->lock); |
| 657 | |
| 658 | /* make sure updates to secondary vcpu structs are visible now */ |
| 659 | smp_mb(); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 660 | kvm_guest_exit(); |
| 661 | |
| 662 | preempt_enable(); |
| 663 | kvm_resched(vcpu); |
| 664 | |
| 665 | now = get_tb(); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 666 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { |
| 667 | /* cancel pending dec exception if dec is positive */ |
| 668 | if (now < vcpu->arch.dec_expires && |
| 669 | kvmppc_core_pending_dec(vcpu)) |
| 670 | kvmppc_core_dequeue_dec(vcpu); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 671 | |
| 672 | ret = RESUME_GUEST; |
| 673 | if (vcpu->arch.trap) |
| 674 | ret = kvmppc_handle_exit(vcpu->arch.kvm_run, vcpu, |
| 675 | vcpu->arch.run_task); |
| 676 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 677 | vcpu->arch.ret = ret; |
| 678 | vcpu->arch.trap = 0; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 679 | |
| 680 | if (vcpu->arch.ceded) { |
| 681 | if (ret != RESUME_GUEST) |
| 682 | kvmppc_end_cede(vcpu); |
| 683 | else |
| 684 | kvmppc_set_timer(vcpu); |
| 685 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 686 | } |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 687 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 688 | spin_lock(&vc->lock); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 689 | out: |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 690 | vc->vcore_state = VCORE_INACTIVE; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 691 | list_for_each_entry_safe(vcpu, vnext, &vc->runnable_threads, |
| 692 | arch.run_list) { |
| 693 | if (vcpu->arch.ret != RESUME_GUEST) { |
| 694 | kvmppc_remove_runnable(vc, vcpu); |
| 695 | wake_up(&vcpu->arch.cpu_run); |
| 696 | } |
| 697 | } |
| 698 | |
| 699 | return 1; |
| 700 | } |
| 701 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 702 | /* |
| 703 | * Wait for some other vcpu thread to execute us, and |
| 704 | * wake us up when we need to handle something in the host. |
| 705 | */ |
| 706 | 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] | 707 | { |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 708 | DEFINE_WAIT(wait); |
| 709 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 710 | prepare_to_wait(&vcpu->arch.cpu_run, &wait, wait_state); |
| 711 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) |
| 712 | schedule(); |
| 713 | finish_wait(&vcpu->arch.cpu_run, &wait); |
| 714 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 715 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 716 | /* |
| 717 | * All the vcpus in this vcore are idle, so wait for a decrementer |
| 718 | * or external interrupt to one of the vcpus. vc->lock is held. |
| 719 | */ |
| 720 | static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc) |
| 721 | { |
| 722 | DEFINE_WAIT(wait); |
| 723 | struct kvm_vcpu *v; |
| 724 | int all_idle = 1; |
| 725 | |
| 726 | prepare_to_wait(&vc->wq, &wait, TASK_INTERRUPTIBLE); |
| 727 | vc->vcore_state = VCORE_SLEEPING; |
| 728 | spin_unlock(&vc->lock); |
| 729 | list_for_each_entry(v, &vc->runnable_threads, arch.run_list) { |
| 730 | if (!v->arch.ceded || v->arch.pending_exceptions) { |
| 731 | all_idle = 0; |
| 732 | break; |
| 733 | } |
| 734 | } |
| 735 | if (all_idle) |
| 736 | schedule(); |
| 737 | finish_wait(&vc->wq, &wait); |
| 738 | spin_lock(&vc->lock); |
| 739 | vc->vcore_state = VCORE_INACTIVE; |
| 740 | } |
| 741 | |
| 742 | static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) |
| 743 | { |
| 744 | int n_ceded; |
| 745 | int prev_state; |
| 746 | struct kvmppc_vcore *vc; |
| 747 | struct kvm_vcpu *v, *vn; |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 748 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 749 | kvm_run->exit_reason = 0; |
| 750 | vcpu->arch.ret = RESUME_GUEST; |
| 751 | vcpu->arch.trap = 0; |
| 752 | |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 753 | /* |
| 754 | * Synchronize with other threads in this virtual core |
| 755 | */ |
| 756 | vc = vcpu->arch.vcore; |
| 757 | spin_lock(&vc->lock); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 758 | vcpu->arch.ceded = 0; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 759 | vcpu->arch.run_task = current; |
| 760 | vcpu->arch.kvm_run = kvm_run; |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 761 | prev_state = vcpu->arch.state; |
| 762 | vcpu->arch.state = KVMPPC_VCPU_RUNNABLE; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 763 | list_add_tail(&vcpu->arch.run_list, &vc->runnable_threads); |
| 764 | ++vc->n_runnable; |
| 765 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 766 | /* |
| 767 | * This happens the first time this is called for a vcpu. |
| 768 | * If the vcore is already running, we may be able to start |
| 769 | * this thread straight away and have it join in. |
| 770 | */ |
| 771 | if (prev_state == KVMPPC_VCPU_STOPPED) { |
| 772 | if (vc->vcore_state == VCORE_RUNNING && |
| 773 | VCORE_EXIT_COUNT(vc) == 0) { |
| 774 | vcpu->arch.ptid = vc->n_runnable - 1; |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 775 | kvmppc_start_thread(vcpu); |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 776 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 777 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 778 | } else if (prev_state == KVMPPC_VCPU_BUSY_IN_HOST) |
| 779 | --vc->n_busy; |
| 780 | |
| 781 | while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && |
| 782 | !signal_pending(current)) { |
| 783 | if (vc->n_busy || vc->vcore_state != VCORE_INACTIVE) { |
| 784 | spin_unlock(&vc->lock); |
| 785 | kvmppc_wait_for_exec(vcpu, TASK_INTERRUPTIBLE); |
| 786 | spin_lock(&vc->lock); |
| 787 | continue; |
| 788 | } |
| 789 | n_ceded = 0; |
| 790 | list_for_each_entry(v, &vc->runnable_threads, arch.run_list) |
| 791 | n_ceded += v->arch.ceded; |
| 792 | if (n_ceded == vc->n_runnable) |
| 793 | kvmppc_vcore_blocked(vc); |
| 794 | else |
| 795 | kvmppc_run_core(vc); |
| 796 | |
| 797 | list_for_each_entry_safe(v, vn, &vc->runnable_threads, |
| 798 | arch.run_list) { |
| 799 | kvmppc_core_deliver_interrupts(v); |
| 800 | if (signal_pending(v->arch.run_task)) { |
| 801 | kvmppc_remove_runnable(vc, v); |
| 802 | v->stat.signal_exits++; |
| 803 | v->arch.kvm_run->exit_reason = KVM_EXIT_INTR; |
| 804 | v->arch.ret = -EINTR; |
| 805 | wake_up(&v->arch.cpu_run); |
| 806 | } |
| 807 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 808 | } |
| 809 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 810 | if (signal_pending(current)) { |
| 811 | if (vc->vcore_state == VCORE_RUNNING || |
| 812 | vc->vcore_state == VCORE_EXITING) { |
| 813 | spin_unlock(&vc->lock); |
| 814 | kvmppc_wait_for_exec(vcpu, TASK_UNINTERRUPTIBLE); |
| 815 | spin_lock(&vc->lock); |
| 816 | } |
| 817 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) { |
| 818 | kvmppc_remove_runnable(vc, vcpu); |
| 819 | vcpu->stat.signal_exits++; |
| 820 | kvm_run->exit_reason = KVM_EXIT_INTR; |
| 821 | vcpu->arch.ret = -EINTR; |
| 822 | } |
| 823 | } |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 824 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 825 | spin_unlock(&vc->lock); |
Paul Mackerras | 371fefd | 2011-06-29 00:23:08 +0000 | [diff] [blame] | 826 | return vcpu->arch.ret; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 827 | } |
| 828 | |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 829 | int kvmppc_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu) |
| 830 | { |
| 831 | int r; |
| 832 | |
Alexander Graf | af8f38b | 2011-08-10 13:57:08 +0200 | [diff] [blame] | 833 | if (!vcpu->arch.sane) { |
| 834 | run->exit_reason = KVM_EXIT_INTERNAL_ERROR; |
| 835 | return -EINVAL; |
| 836 | } |
| 837 | |
Paul Mackerras | 19ccb76 | 2011-07-23 17:42:46 +1000 | [diff] [blame] | 838 | /* No need to go into the guest when all we'll do is come back out */ |
| 839 | if (signal_pending(current)) { |
| 840 | run->exit_reason = KVM_EXIT_INTR; |
| 841 | return -EINTR; |
| 842 | } |
| 843 | |
| 844 | /* On PPC970, check that we have an RMA region */ |
| 845 | if (!vcpu->kvm->arch.rma && cpu_has_feature(CPU_FTR_ARCH_201)) |
| 846 | return -EPERM; |
| 847 | |
| 848 | flush_fp_to_thread(current); |
| 849 | flush_altivec_to_thread(current); |
| 850 | flush_vsx_to_thread(current); |
| 851 | vcpu->arch.wqp = &vcpu->arch.vcore->wq; |
| 852 | |
Paul Mackerras | a8606e2 | 2011-06-29 00:22:05 +0000 | [diff] [blame] | 853 | do { |
| 854 | r = kvmppc_run_vcpu(run, vcpu); |
| 855 | |
| 856 | if (run->exit_reason == KVM_EXIT_PAPR_HCALL && |
| 857 | !(vcpu->arch.shregs.msr & MSR_PR)) { |
| 858 | r = kvmppc_pseries_do_hcall(vcpu); |
| 859 | kvmppc_core_deliver_interrupts(vcpu); |
| 860 | } |
| 861 | } while (r == RESUME_GUEST); |
| 862 | return r; |
| 863 | } |
| 864 | |
David Gibson | 54738c0 | 2011-06-29 00:22:41 +0000 | [diff] [blame] | 865 | static long kvmppc_stt_npages(unsigned long window_size) |
| 866 | { |
| 867 | return ALIGN((window_size >> SPAPR_TCE_SHIFT) |
| 868 | * sizeof(u64), PAGE_SIZE) / PAGE_SIZE; |
| 869 | } |
| 870 | |
| 871 | static void release_spapr_tce_table(struct kvmppc_spapr_tce_table *stt) |
| 872 | { |
| 873 | struct kvm *kvm = stt->kvm; |
| 874 | int i; |
| 875 | |
| 876 | mutex_lock(&kvm->lock); |
| 877 | list_del(&stt->list); |
| 878 | for (i = 0; i < kvmppc_stt_npages(stt->window_size); i++) |
| 879 | __free_page(stt->pages[i]); |
| 880 | kfree(stt); |
| 881 | mutex_unlock(&kvm->lock); |
| 882 | |
| 883 | kvm_put_kvm(kvm); |
| 884 | } |
| 885 | |
| 886 | static int kvm_spapr_tce_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
| 887 | { |
| 888 | struct kvmppc_spapr_tce_table *stt = vma->vm_file->private_data; |
| 889 | struct page *page; |
| 890 | |
| 891 | if (vmf->pgoff >= kvmppc_stt_npages(stt->window_size)) |
| 892 | return VM_FAULT_SIGBUS; |
| 893 | |
| 894 | page = stt->pages[vmf->pgoff]; |
| 895 | get_page(page); |
| 896 | vmf->page = page; |
| 897 | return 0; |
| 898 | } |
| 899 | |
| 900 | static const struct vm_operations_struct kvm_spapr_tce_vm_ops = { |
| 901 | .fault = kvm_spapr_tce_fault, |
| 902 | }; |
| 903 | |
| 904 | static int kvm_spapr_tce_mmap(struct file *file, struct vm_area_struct *vma) |
| 905 | { |
| 906 | vma->vm_ops = &kvm_spapr_tce_vm_ops; |
| 907 | return 0; |
| 908 | } |
| 909 | |
| 910 | static int kvm_spapr_tce_release(struct inode *inode, struct file *filp) |
| 911 | { |
| 912 | struct kvmppc_spapr_tce_table *stt = filp->private_data; |
| 913 | |
| 914 | release_spapr_tce_table(stt); |
| 915 | return 0; |
| 916 | } |
| 917 | |
| 918 | static struct file_operations kvm_spapr_tce_fops = { |
| 919 | .mmap = kvm_spapr_tce_mmap, |
| 920 | .release = kvm_spapr_tce_release, |
| 921 | }; |
| 922 | |
| 923 | long kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm, |
| 924 | struct kvm_create_spapr_tce *args) |
| 925 | { |
| 926 | struct kvmppc_spapr_tce_table *stt = NULL; |
| 927 | long npages; |
| 928 | int ret = -ENOMEM; |
| 929 | int i; |
| 930 | |
| 931 | /* Check this LIOBN hasn't been previously allocated */ |
| 932 | list_for_each_entry(stt, &kvm->arch.spapr_tce_tables, list) { |
| 933 | if (stt->liobn == args->liobn) |
| 934 | return -EBUSY; |
| 935 | } |
| 936 | |
| 937 | npages = kvmppc_stt_npages(args->window_size); |
| 938 | |
| 939 | stt = kzalloc(sizeof(*stt) + npages* sizeof(struct page *), |
| 940 | GFP_KERNEL); |
| 941 | if (!stt) |
| 942 | goto fail; |
| 943 | |
| 944 | stt->liobn = args->liobn; |
| 945 | stt->window_size = args->window_size; |
| 946 | stt->kvm = kvm; |
| 947 | |
| 948 | for (i = 0; i < npages; i++) { |
| 949 | stt->pages[i] = alloc_page(GFP_KERNEL | __GFP_ZERO); |
| 950 | if (!stt->pages[i]) |
| 951 | goto fail; |
| 952 | } |
| 953 | |
| 954 | kvm_get_kvm(kvm); |
| 955 | |
| 956 | mutex_lock(&kvm->lock); |
| 957 | list_add(&stt->list, &kvm->arch.spapr_tce_tables); |
| 958 | |
| 959 | mutex_unlock(&kvm->lock); |
| 960 | |
| 961 | return anon_inode_getfd("kvm-spapr-tce", &kvm_spapr_tce_fops, |
| 962 | stt, O_RDWR); |
| 963 | |
| 964 | fail: |
| 965 | if (stt) { |
| 966 | for (i = 0; i < npages; i++) |
| 967 | if (stt->pages[i]) |
| 968 | __free_page(stt->pages[i]); |
| 969 | |
| 970 | kfree(stt); |
| 971 | } |
| 972 | return ret; |
| 973 | } |
| 974 | |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 975 | /* 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] | 976 | Assumes POWER7 or PPC970. */ |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 977 | static inline int lpcr_rmls(unsigned long rma_size) |
| 978 | { |
| 979 | switch (rma_size) { |
| 980 | case 32ul << 20: /* 32 MB */ |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 981 | if (cpu_has_feature(CPU_FTR_ARCH_206)) |
| 982 | return 8; /* only supported on POWER7 */ |
| 983 | return -1; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 984 | case 64ul << 20: /* 64 MB */ |
| 985 | return 3; |
| 986 | case 128ul << 20: /* 128 MB */ |
| 987 | return 7; |
| 988 | case 256ul << 20: /* 256 MB */ |
| 989 | return 4; |
| 990 | case 1ul << 30: /* 1 GB */ |
| 991 | return 2; |
| 992 | case 16ul << 30: /* 16 GB */ |
| 993 | return 1; |
| 994 | case 256ul << 30: /* 256 GB */ |
| 995 | return 0; |
| 996 | default: |
| 997 | return -1; |
| 998 | } |
| 999 | } |
| 1000 | |
| 1001 | static int kvm_rma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
| 1002 | { |
| 1003 | struct kvmppc_rma_info *ri = vma->vm_file->private_data; |
| 1004 | struct page *page; |
| 1005 | |
| 1006 | if (vmf->pgoff >= ri->npages) |
| 1007 | return VM_FAULT_SIGBUS; |
| 1008 | |
| 1009 | page = pfn_to_page(ri->base_pfn + vmf->pgoff); |
| 1010 | get_page(page); |
| 1011 | vmf->page = page; |
| 1012 | return 0; |
| 1013 | } |
| 1014 | |
| 1015 | static const struct vm_operations_struct kvm_rma_vm_ops = { |
| 1016 | .fault = kvm_rma_fault, |
| 1017 | }; |
| 1018 | |
| 1019 | static int kvm_rma_mmap(struct file *file, struct vm_area_struct *vma) |
| 1020 | { |
| 1021 | vma->vm_flags |= VM_RESERVED; |
| 1022 | vma->vm_ops = &kvm_rma_vm_ops; |
| 1023 | return 0; |
| 1024 | } |
| 1025 | |
| 1026 | static int kvm_rma_release(struct inode *inode, struct file *filp) |
| 1027 | { |
| 1028 | struct kvmppc_rma_info *ri = filp->private_data; |
| 1029 | |
| 1030 | kvm_release_rma(ri); |
| 1031 | return 0; |
| 1032 | } |
| 1033 | |
| 1034 | static struct file_operations kvm_rma_fops = { |
| 1035 | .mmap = kvm_rma_mmap, |
| 1036 | .release = kvm_rma_release, |
| 1037 | }; |
| 1038 | |
| 1039 | long kvm_vm_ioctl_allocate_rma(struct kvm *kvm, struct kvm_allocate_rma *ret) |
| 1040 | { |
| 1041 | struct kvmppc_rma_info *ri; |
| 1042 | long fd; |
| 1043 | |
| 1044 | ri = kvm_alloc_rma(); |
| 1045 | if (!ri) |
| 1046 | return -ENOMEM; |
| 1047 | |
| 1048 | fd = anon_inode_getfd("kvm-rma", &kvm_rma_fops, ri, O_RDWR); |
| 1049 | if (fd < 0) |
| 1050 | kvm_release_rma(ri); |
| 1051 | |
| 1052 | ret->rma_size = ri->npages << PAGE_SHIFT; |
| 1053 | return fd; |
| 1054 | } |
| 1055 | |
| 1056 | static struct page *hva_to_page(unsigned long addr) |
| 1057 | { |
| 1058 | struct page *page[1]; |
| 1059 | int npages; |
| 1060 | |
| 1061 | might_sleep(); |
| 1062 | |
| 1063 | npages = get_user_pages_fast(addr, 1, 1, page); |
| 1064 | |
| 1065 | if (unlikely(npages != 1)) |
| 1066 | return 0; |
| 1067 | |
| 1068 | return page[0]; |
| 1069 | } |
| 1070 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1071 | int kvmppc_core_prepare_memory_region(struct kvm *kvm, |
| 1072 | struct kvm_userspace_memory_region *mem) |
| 1073 | { |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1074 | unsigned long psize, porder; |
| 1075 | unsigned long i, npages, totalpages; |
| 1076 | unsigned long pg_ix; |
| 1077 | struct kvmppc_pginfo *pginfo; |
| 1078 | unsigned long hva; |
| 1079 | struct kvmppc_rma_info *ri = NULL; |
| 1080 | struct page *page; |
| 1081 | |
| 1082 | /* For now, only allow 16MB pages */ |
| 1083 | porder = LARGE_PAGE_ORDER; |
| 1084 | psize = 1ul << porder; |
| 1085 | if ((mem->memory_size & (psize - 1)) || |
| 1086 | (mem->guest_phys_addr & (psize - 1))) { |
| 1087 | pr_err("bad memory_size=%llx @ %llx\n", |
| 1088 | mem->memory_size, mem->guest_phys_addr); |
| 1089 | return -EINVAL; |
| 1090 | } |
| 1091 | |
| 1092 | npages = mem->memory_size >> porder; |
| 1093 | totalpages = (mem->guest_phys_addr + mem->memory_size) >> porder; |
| 1094 | |
| 1095 | /* More memory than we have space to track? */ |
| 1096 | if (totalpages > (1ul << (MAX_MEM_ORDER - LARGE_PAGE_ORDER))) |
| 1097 | return -EINVAL; |
| 1098 | |
| 1099 | /* Do we already have an RMA registered? */ |
| 1100 | if (mem->guest_phys_addr == 0 && kvm->arch.rma) |
| 1101 | return -EINVAL; |
| 1102 | |
| 1103 | if (totalpages > kvm->arch.ram_npages) |
| 1104 | kvm->arch.ram_npages = totalpages; |
| 1105 | |
| 1106 | /* Is this one of our preallocated RMAs? */ |
| 1107 | if (mem->guest_phys_addr == 0) { |
| 1108 | struct vm_area_struct *vma; |
| 1109 | |
| 1110 | down_read(¤t->mm->mmap_sem); |
| 1111 | vma = find_vma(current->mm, mem->userspace_addr); |
| 1112 | if (vma && vma->vm_file && |
| 1113 | vma->vm_file->f_op == &kvm_rma_fops && |
| 1114 | mem->userspace_addr == vma->vm_start) |
| 1115 | ri = vma->vm_file->private_data; |
| 1116 | up_read(¤t->mm->mmap_sem); |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 1117 | if (!ri && cpu_has_feature(CPU_FTR_ARCH_201)) { |
| 1118 | pr_err("CPU requires an RMO\n"); |
| 1119 | return -EINVAL; |
| 1120 | } |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1121 | } |
| 1122 | |
| 1123 | if (ri) { |
| 1124 | unsigned long rma_size; |
| 1125 | unsigned long lpcr; |
| 1126 | long rmls; |
| 1127 | |
| 1128 | rma_size = ri->npages << PAGE_SHIFT; |
| 1129 | if (rma_size > mem->memory_size) |
| 1130 | rma_size = mem->memory_size; |
| 1131 | rmls = lpcr_rmls(rma_size); |
| 1132 | if (rmls < 0) { |
| 1133 | pr_err("Can't use RMA of 0x%lx bytes\n", rma_size); |
| 1134 | return -EINVAL; |
| 1135 | } |
| 1136 | atomic_inc(&ri->use_count); |
| 1137 | kvm->arch.rma = ri; |
| 1138 | kvm->arch.n_rma_pages = rma_size >> porder; |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 1139 | |
| 1140 | /* Update LPCR and RMOR */ |
| 1141 | lpcr = kvm->arch.lpcr; |
| 1142 | if (cpu_has_feature(CPU_FTR_ARCH_201)) { |
| 1143 | /* PPC970; insert RMLS value (split field) in HID4 */ |
| 1144 | lpcr &= ~((1ul << HID4_RMLS0_SH) | |
| 1145 | (3ul << HID4_RMLS2_SH)); |
| 1146 | lpcr |= ((rmls >> 2) << HID4_RMLS0_SH) | |
| 1147 | ((rmls & 3) << HID4_RMLS2_SH); |
| 1148 | /* RMOR is also in HID4 */ |
| 1149 | lpcr |= ((ri->base_pfn >> (26 - PAGE_SHIFT)) & 0xffff) |
| 1150 | << HID4_RMOR_SH; |
| 1151 | } else { |
| 1152 | /* POWER7 */ |
| 1153 | lpcr &= ~(LPCR_VPM0 | LPCR_VRMA_L); |
| 1154 | lpcr |= rmls << LPCR_RMLS_SH; |
| 1155 | kvm->arch.rmor = kvm->arch.rma->base_pfn << PAGE_SHIFT; |
| 1156 | } |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1157 | kvm->arch.lpcr = lpcr; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1158 | pr_info("Using RMO at %lx size %lx (LPCR = %lx)\n", |
| 1159 | ri->base_pfn << PAGE_SHIFT, rma_size, lpcr); |
| 1160 | } |
| 1161 | |
| 1162 | pg_ix = mem->guest_phys_addr >> porder; |
| 1163 | pginfo = kvm->arch.ram_pginfo + pg_ix; |
| 1164 | for (i = 0; i < npages; ++i, ++pg_ix) { |
| 1165 | if (ri && pg_ix < kvm->arch.n_rma_pages) { |
| 1166 | pginfo[i].pfn = ri->base_pfn + |
| 1167 | (pg_ix << (porder - PAGE_SHIFT)); |
| 1168 | continue; |
| 1169 | } |
| 1170 | hva = mem->userspace_addr + (i << porder); |
| 1171 | page = hva_to_page(hva); |
| 1172 | if (!page) { |
| 1173 | pr_err("oops, no pfn for hva %lx\n", hva); |
| 1174 | goto err; |
| 1175 | } |
| 1176 | /* Check it's a 16MB page */ |
| 1177 | if (!PageHead(page) || |
| 1178 | compound_order(page) != (LARGE_PAGE_ORDER - PAGE_SHIFT)) { |
| 1179 | pr_err("page at %lx isn't 16MB (o=%d)\n", |
| 1180 | hva, compound_order(page)); |
| 1181 | goto err; |
| 1182 | } |
| 1183 | pginfo[i].pfn = page_to_pfn(page); |
| 1184 | } |
| 1185 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1186 | return 0; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1187 | |
| 1188 | err: |
| 1189 | return -EINVAL; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1190 | } |
| 1191 | |
| 1192 | void kvmppc_core_commit_memory_region(struct kvm *kvm, |
| 1193 | struct kvm_userspace_memory_region *mem) |
| 1194 | { |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1195 | if (mem->guest_phys_addr == 0 && mem->memory_size != 0 && |
| 1196 | !kvm->arch.rma) |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1197 | kvmppc_map_vrma(kvm, mem); |
| 1198 | } |
| 1199 | |
| 1200 | int kvmppc_core_init_vm(struct kvm *kvm) |
| 1201 | { |
| 1202 | long r; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1203 | unsigned long npages = 1ul << (MAX_MEM_ORDER - LARGE_PAGE_ORDER); |
| 1204 | long err = -ENOMEM; |
| 1205 | unsigned long lpcr; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1206 | |
| 1207 | /* Allocate hashed page table */ |
| 1208 | r = kvmppc_alloc_hpt(kvm); |
David Gibson | 54738c0 | 2011-06-29 00:22:41 +0000 | [diff] [blame] | 1209 | if (r) |
| 1210 | return r; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1211 | |
David Gibson | 54738c0 | 2011-06-29 00:22:41 +0000 | [diff] [blame] | 1212 | INIT_LIST_HEAD(&kvm->arch.spapr_tce_tables); |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1213 | |
| 1214 | kvm->arch.ram_pginfo = kzalloc(npages * sizeof(struct kvmppc_pginfo), |
| 1215 | GFP_KERNEL); |
| 1216 | if (!kvm->arch.ram_pginfo) { |
| 1217 | pr_err("kvmppc_core_init_vm: couldn't alloc %lu bytes\n", |
| 1218 | npages * sizeof(struct kvmppc_pginfo)); |
| 1219 | goto out_free; |
| 1220 | } |
| 1221 | |
| 1222 | kvm->arch.ram_npages = 0; |
| 1223 | kvm->arch.ram_psize = 1ul << LARGE_PAGE_ORDER; |
| 1224 | kvm->arch.ram_porder = LARGE_PAGE_ORDER; |
| 1225 | kvm->arch.rma = NULL; |
| 1226 | kvm->arch.n_rma_pages = 0; |
| 1227 | |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 1228 | kvm->arch.host_sdr1 = mfspr(SPRN_SDR1); |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1229 | |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 1230 | if (cpu_has_feature(CPU_FTR_ARCH_201)) { |
| 1231 | /* PPC970; HID4 is effectively the LPCR */ |
| 1232 | unsigned long lpid = kvm->arch.lpid; |
| 1233 | kvm->arch.host_lpid = 0; |
| 1234 | kvm->arch.host_lpcr = lpcr = mfspr(SPRN_HID4); |
| 1235 | lpcr &= ~((3 << HID4_LPID1_SH) | (0xful << HID4_LPID5_SH)); |
| 1236 | lpcr |= ((lpid >> 4) << HID4_LPID1_SH) | |
| 1237 | ((lpid & 0xf) << HID4_LPID5_SH); |
| 1238 | } else { |
| 1239 | /* POWER7; init LPCR for virtual RMA mode */ |
| 1240 | kvm->arch.host_lpid = mfspr(SPRN_LPID); |
| 1241 | kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR); |
| 1242 | lpcr &= LPCR_PECE | LPCR_LPES; |
| 1243 | lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE | |
| 1244 | LPCR_VPM0 | LPCR_VRMA_L; |
| 1245 | } |
| 1246 | kvm->arch.lpcr = lpcr; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1247 | |
David Gibson | 54738c0 | 2011-06-29 00:22:41 +0000 | [diff] [blame] | 1248 | return 0; |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1249 | |
| 1250 | out_free: |
| 1251 | kvmppc_free_hpt(kvm); |
| 1252 | return err; |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1253 | } |
| 1254 | |
| 1255 | void kvmppc_core_destroy_vm(struct kvm *kvm) |
| 1256 | { |
Paul Mackerras | aa04b4c | 2011-06-29 00:25:44 +0000 | [diff] [blame] | 1257 | struct kvmppc_pginfo *pginfo; |
| 1258 | unsigned long i; |
| 1259 | |
| 1260 | if (kvm->arch.ram_pginfo) { |
| 1261 | pginfo = kvm->arch.ram_pginfo; |
| 1262 | kvm->arch.ram_pginfo = NULL; |
| 1263 | for (i = kvm->arch.n_rma_pages; i < kvm->arch.ram_npages; ++i) |
| 1264 | if (pginfo[i].pfn) |
| 1265 | put_page(pfn_to_page(pginfo[i].pfn)); |
| 1266 | kfree(pginfo); |
| 1267 | } |
| 1268 | if (kvm->arch.rma) { |
| 1269 | kvm_release_rma(kvm->arch.rma); |
| 1270 | kvm->arch.rma = NULL; |
| 1271 | } |
| 1272 | |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1273 | kvmppc_free_hpt(kvm); |
David Gibson | 54738c0 | 2011-06-29 00:22:41 +0000 | [diff] [blame] | 1274 | WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables)); |
Paul Mackerras | de56a94 | 2011-06-29 00:21:34 +0000 | [diff] [blame] | 1275 | } |
| 1276 | |
| 1277 | /* These are stubs for now */ |
| 1278 | void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end) |
| 1279 | { |
| 1280 | } |
| 1281 | |
| 1282 | /* We don't need to emulate any privileged instructions or dcbz */ |
| 1283 | int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu, |
| 1284 | unsigned int inst, int *advance) |
| 1285 | { |
| 1286 | return EMULATE_FAIL; |
| 1287 | } |
| 1288 | |
| 1289 | int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs) |
| 1290 | { |
| 1291 | return EMULATE_FAIL; |
| 1292 | } |
| 1293 | |
| 1294 | int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt) |
| 1295 | { |
| 1296 | return EMULATE_FAIL; |
| 1297 | } |
| 1298 | |
| 1299 | static int kvmppc_book3s_hv_init(void) |
| 1300 | { |
| 1301 | int r; |
| 1302 | |
| 1303 | r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
| 1304 | |
| 1305 | if (r) |
| 1306 | return r; |
| 1307 | |
| 1308 | r = kvmppc_mmu_hv_init(); |
| 1309 | |
| 1310 | return r; |
| 1311 | } |
| 1312 | |
| 1313 | static void kvmppc_book3s_hv_exit(void) |
| 1314 | { |
| 1315 | kvm_exit(); |
| 1316 | } |
| 1317 | |
| 1318 | module_init(kvmppc_book3s_hv_init); |
| 1319 | module_exit(kvmppc_book3s_hv_exit); |