2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License, version 2, as
4 * published by the Free Software Foundation.
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
9 * GNU General Public License for more details.
11 * You should have received a copy of the GNU General Public License
12 * along with this program; if not, write to the Free Software
13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
15 * Copyright IBM Corp. 2007
17 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
18 * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
21 #include <linux/errno.h>
22 #include <linux/err.h>
23 #include <linux/kvm_host.h>
24 #include <linux/vmalloc.h>
25 #include <linux/hrtimer.h>
27 #include <linux/slab.h>
28 #include <asm/cputable.h>
29 #include <asm/uaccess.h>
30 #include <asm/kvm_ppc.h>
31 #include <asm/tlbflush.h>
32 #include <asm/cputhreads.h>
34 #include "../mm/mmu_decl.h"
36 #define CREATE_TRACE_POINTS
39 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
41 return !(v->arch.shared->msr & MSR_WE) ||
42 !!(v->arch.pending_exceptions) ||
46 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
48 int nr = kvmppc_get_gpr(vcpu, 11);
50 unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
51 unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
52 unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
53 unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
56 if (!(vcpu->arch.shared->msr & MSR_SF)) {
65 case HC_VENDOR_KVM | KVM_HC_PPC_MAP_MAGIC_PAGE:
67 vcpu->arch.magic_page_pa = param1;
68 vcpu->arch.magic_page_ea = param2;
70 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
75 case HC_VENDOR_KVM | KVM_HC_FEATURES:
77 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500)
78 /* XXX Missing magic page on 44x */
79 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
82 /* Second return value is in r4 */
85 r = HC_EV_UNIMPLEMENTED;
89 kvmppc_set_gpr(vcpu, 4, r2);
94 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
98 /* We have to know what CPU to virtualize */
102 /* PAPR only works with book3s_64 */
103 if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
106 #ifdef CONFIG_KVM_BOOK3S_64_HV
107 /* HV KVM can only do PAPR mode for now */
108 if (!vcpu->arch.papr_enabled)
116 return r ? 0 : -EINVAL;
119 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
121 enum emulation_result er;
124 er = kvmppc_emulate_instruction(run, vcpu);
127 /* Future optimization: only reload non-volatiles if they were
128 * actually modified. */
131 case EMULATE_DO_MMIO:
132 run->exit_reason = KVM_EXIT_MMIO;
133 /* We must reload nonvolatiles because "update" load/store
134 * instructions modify register state. */
135 /* Future optimization: only reload non-volatiles if they were
136 * actually modified. */
140 /* XXX Deliver Program interrupt to guest. */
141 printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
142 kvmppc_get_last_inst(vcpu));
152 int kvm_arch_hardware_enable(void *garbage)
157 void kvm_arch_hardware_disable(void *garbage)
161 int kvm_arch_hardware_setup(void)
166 void kvm_arch_hardware_unsetup(void)
170 void kvm_arch_check_processor_compat(void *rtn)
172 *(int *)rtn = kvmppc_core_check_processor_compat();
175 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
180 return kvmppc_core_init_vm(kvm);
183 void kvm_arch_destroy_vm(struct kvm *kvm)
186 struct kvm_vcpu *vcpu;
188 kvm_for_each_vcpu(i, vcpu, kvm)
189 kvm_arch_vcpu_free(vcpu);
191 mutex_lock(&kvm->lock);
192 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
193 kvm->vcpus[i] = NULL;
195 atomic_set(&kvm->online_vcpus, 0);
197 kvmppc_core_destroy_vm(kvm);
199 mutex_unlock(&kvm->lock);
202 void kvm_arch_sync_events(struct kvm *kvm)
206 int kvm_dev_ioctl_check_extension(long ext)
212 case KVM_CAP_PPC_BOOKE_SREGS:
214 case KVM_CAP_PPC_SEGSTATE:
215 case KVM_CAP_PPC_HIOR:
216 case KVM_CAP_PPC_PAPR:
218 case KVM_CAP_PPC_UNSET_IRQ:
219 case KVM_CAP_PPC_IRQ_LEVEL:
220 case KVM_CAP_ENABLE_CAP:
221 case KVM_CAP_ONE_REG:
224 #ifndef CONFIG_KVM_BOOK3S_64_HV
225 case KVM_CAP_PPC_PAIRED_SINGLES:
226 case KVM_CAP_PPC_OSI:
227 case KVM_CAP_PPC_GET_PVINFO:
228 #ifdef CONFIG_KVM_E500
233 case KVM_CAP_COALESCED_MMIO:
234 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
237 #ifdef CONFIG_KVM_BOOK3S_64_HV
238 case KVM_CAP_SPAPR_TCE:
241 case KVM_CAP_PPC_SMT:
242 r = threads_per_core;
244 case KVM_CAP_PPC_RMA:
246 /* PPC970 requires an RMA */
247 if (cpu_has_feature(CPU_FTR_ARCH_201))
250 case KVM_CAP_SYNC_MMU:
251 r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0;
254 case KVM_CAP_NR_VCPUS:
256 * Recommending a number of CPUs is somewhat arbitrary; we
257 * return the number of present CPUs for -HV (since a host
258 * will have secondary threads "offline"), and for other KVM
259 * implementations just count online CPUs.
261 #ifdef CONFIG_KVM_BOOK3S_64_HV
262 r = num_present_cpus();
264 r = num_online_cpus();
267 case KVM_CAP_MAX_VCPUS:
278 long kvm_arch_dev_ioctl(struct file *filp,
279 unsigned int ioctl, unsigned long arg)
284 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
285 struct kvm_memory_slot *dont)
289 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
294 int kvm_arch_prepare_memory_region(struct kvm *kvm,
295 struct kvm_memory_slot *memslot,
296 struct kvm_memory_slot old,
297 struct kvm_userspace_memory_region *mem,
300 return kvmppc_core_prepare_memory_region(kvm, mem);
303 void kvm_arch_commit_memory_region(struct kvm *kvm,
304 struct kvm_userspace_memory_region *mem,
305 struct kvm_memory_slot old,
308 kvmppc_core_commit_memory_region(kvm, mem);
312 void kvm_arch_flush_shadow(struct kvm *kvm)
316 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
318 struct kvm_vcpu *vcpu;
319 vcpu = kvmppc_core_vcpu_create(kvm, id);
321 vcpu->arch.wqp = &vcpu->wq;
322 kvmppc_create_vcpu_debugfs(vcpu, id);
327 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
329 /* Make sure we're not using the vcpu anymore */
330 hrtimer_cancel(&vcpu->arch.dec_timer);
331 tasklet_kill(&vcpu->arch.tasklet);
333 kvmppc_remove_vcpu_debugfs(vcpu);
334 kvmppc_core_vcpu_free(vcpu);
337 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
339 kvm_arch_vcpu_free(vcpu);
342 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
344 return kvmppc_core_pending_dec(vcpu);
348 * low level hrtimer wake routine. Because this runs in hardirq context
349 * we schedule a tasklet to do the real work.
351 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
353 struct kvm_vcpu *vcpu;
355 vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
356 tasklet_schedule(&vcpu->arch.tasklet);
358 return HRTIMER_NORESTART;
361 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
363 hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
364 tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
365 vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
366 vcpu->arch.dec_expires = ~(u64)0;
368 #ifdef CONFIG_KVM_EXIT_TIMING
369 mutex_init(&vcpu->arch.exit_timing_lock);
375 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
377 kvmppc_mmu_destroy(vcpu);
380 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
384 * vrsave (formerly usprg0) isn't used by Linux, but may
385 * be used by the guest.
387 * On non-booke this is associated with Altivec and
388 * is handled by code in book3s.c.
390 mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
392 kvmppc_core_vcpu_load(vcpu, cpu);
393 vcpu->cpu = smp_processor_id();
396 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
398 kvmppc_core_vcpu_put(vcpu);
400 vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
405 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
406 struct kvm_guest_debug *dbg)
411 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
414 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
417 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
420 u64 uninitialized_var(gpr);
422 if (run->mmio.len > sizeof(gpr)) {
423 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
427 if (vcpu->arch.mmio_is_bigendian) {
428 switch (run->mmio.len) {
429 case 8: gpr = *(u64 *)run->mmio.data; break;
430 case 4: gpr = *(u32 *)run->mmio.data; break;
431 case 2: gpr = *(u16 *)run->mmio.data; break;
432 case 1: gpr = *(u8 *)run->mmio.data; break;
435 /* Convert BE data from userland back to LE. */
436 switch (run->mmio.len) {
437 case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
438 case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
439 case 1: gpr = *(u8 *)run->mmio.data; break;
443 if (vcpu->arch.mmio_sign_extend) {
444 switch (run->mmio.len) {
459 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
461 switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
462 case KVM_MMIO_REG_GPR:
463 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
465 case KVM_MMIO_REG_FPR:
466 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
468 #ifdef CONFIG_PPC_BOOK3S
469 case KVM_MMIO_REG_QPR:
470 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
472 case KVM_MMIO_REG_FQPR:
473 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
474 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
482 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
483 unsigned int rt, unsigned int bytes, int is_bigendian)
485 if (bytes > sizeof(run->mmio.data)) {
486 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
490 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
491 run->mmio.len = bytes;
492 run->mmio.is_write = 0;
494 vcpu->arch.io_gpr = rt;
495 vcpu->arch.mmio_is_bigendian = is_bigendian;
496 vcpu->mmio_needed = 1;
497 vcpu->mmio_is_write = 0;
498 vcpu->arch.mmio_sign_extend = 0;
500 return EMULATE_DO_MMIO;
503 /* Same as above, but sign extends */
504 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
505 unsigned int rt, unsigned int bytes, int is_bigendian)
509 r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
510 vcpu->arch.mmio_sign_extend = 1;
515 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
516 u64 val, unsigned int bytes, int is_bigendian)
518 void *data = run->mmio.data;
520 if (bytes > sizeof(run->mmio.data)) {
521 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
525 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
526 run->mmio.len = bytes;
527 run->mmio.is_write = 1;
528 vcpu->mmio_needed = 1;
529 vcpu->mmio_is_write = 1;
531 /* Store the value at the lowest bytes in 'data'. */
534 case 8: *(u64 *)data = val; break;
535 case 4: *(u32 *)data = val; break;
536 case 2: *(u16 *)data = val; break;
537 case 1: *(u8 *)data = val; break;
540 /* Store LE value into 'data'. */
542 case 4: st_le32(data, val); break;
543 case 2: st_le16(data, val); break;
544 case 1: *(u8 *)data = val; break;
548 return EMULATE_DO_MMIO;
551 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
556 if (vcpu->sigset_active)
557 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
559 if (vcpu->mmio_needed) {
560 if (!vcpu->mmio_is_write)
561 kvmppc_complete_mmio_load(vcpu, run);
562 vcpu->mmio_needed = 0;
563 } else if (vcpu->arch.dcr_needed) {
564 if (!vcpu->arch.dcr_is_write)
565 kvmppc_complete_dcr_load(vcpu, run);
566 vcpu->arch.dcr_needed = 0;
567 } else if (vcpu->arch.osi_needed) {
568 u64 *gprs = run->osi.gprs;
571 for (i = 0; i < 32; i++)
572 kvmppc_set_gpr(vcpu, i, gprs[i]);
573 vcpu->arch.osi_needed = 0;
574 } else if (vcpu->arch.hcall_needed) {
577 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
578 for (i = 0; i < 9; ++i)
579 kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
580 vcpu->arch.hcall_needed = 0;
583 r = kvmppc_vcpu_run(run, vcpu);
585 if (vcpu->sigset_active)
586 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
591 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
597 if (waitqueue_active(vcpu->arch.wqp)) {
598 wake_up_interruptible(vcpu->arch.wqp);
599 vcpu->stat.halt_wakeup++;
600 } else if (cpu != me && cpu != -1) {
601 smp_send_reschedule(vcpu->cpu);
606 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
608 if (irq->irq == KVM_INTERRUPT_UNSET) {
609 kvmppc_core_dequeue_external(vcpu, irq);
613 kvmppc_core_queue_external(vcpu, irq);
619 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
620 struct kvm_enable_cap *cap)
628 case KVM_CAP_PPC_OSI:
630 vcpu->arch.osi_enabled = true;
632 case KVM_CAP_PPC_PAPR:
634 vcpu->arch.papr_enabled = true;
636 #ifdef CONFIG_KVM_E500
637 case KVM_CAP_SW_TLB: {
638 struct kvm_config_tlb cfg;
639 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
642 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
645 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
655 r = kvmppc_sanity_check(vcpu);
660 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
661 struct kvm_mp_state *mp_state)
666 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
667 struct kvm_mp_state *mp_state)
672 long kvm_arch_vcpu_ioctl(struct file *filp,
673 unsigned int ioctl, unsigned long arg)
675 struct kvm_vcpu *vcpu = filp->private_data;
676 void __user *argp = (void __user *)arg;
680 case KVM_INTERRUPT: {
681 struct kvm_interrupt irq;
683 if (copy_from_user(&irq, argp, sizeof(irq)))
685 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
691 struct kvm_enable_cap cap;
693 if (copy_from_user(&cap, argp, sizeof(cap)))
695 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
699 case KVM_SET_ONE_REG:
700 case KVM_GET_ONE_REG:
702 struct kvm_one_reg reg;
704 if (copy_from_user(®, argp, sizeof(reg)))
706 if (ioctl == KVM_SET_ONE_REG)
707 r = kvm_vcpu_ioctl_set_one_reg(vcpu, ®);
709 r = kvm_vcpu_ioctl_get_one_reg(vcpu, ®);
713 #ifdef CONFIG_KVM_E500
714 case KVM_DIRTY_TLB: {
715 struct kvm_dirty_tlb dirty;
717 if (copy_from_user(&dirty, argp, sizeof(dirty)))
719 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
732 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
734 return VM_FAULT_SIGBUS;
737 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
739 u32 inst_lis = 0x3c000000;
740 u32 inst_ori = 0x60000000;
741 u32 inst_nop = 0x60000000;
742 u32 inst_sc = 0x44000002;
743 u32 inst_imm_mask = 0xffff;
746 * The hypercall to get into KVM from within guest context is as
749 * lis r0, r0, KVM_SC_MAGIC_R0@h
750 * ori r0, KVM_SC_MAGIC_R0@l
754 pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
755 pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask);
756 pvinfo->hcall[2] = inst_sc;
757 pvinfo->hcall[3] = inst_nop;
762 long kvm_arch_vm_ioctl(struct file *filp,
763 unsigned int ioctl, unsigned long arg)
765 void __user *argp = (void __user *)arg;
769 case KVM_PPC_GET_PVINFO: {
770 struct kvm_ppc_pvinfo pvinfo;
771 memset(&pvinfo, 0, sizeof(pvinfo));
772 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
773 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
780 #ifdef CONFIG_KVM_BOOK3S_64_HV
781 case KVM_CREATE_SPAPR_TCE: {
782 struct kvm_create_spapr_tce create_tce;
783 struct kvm *kvm = filp->private_data;
786 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
788 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
792 case KVM_ALLOCATE_RMA: {
793 struct kvm *kvm = filp->private_data;
794 struct kvm_allocate_rma rma;
796 r = kvm_vm_ioctl_allocate_rma(kvm, &rma);
797 if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma)))
801 #endif /* CONFIG_KVM_BOOK3S_64_HV */
811 int kvm_arch_init(void *opaque)
816 void kvm_arch_exit(void)