#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
/* #define EXIT_DEBUG */
-/* #define DEBUG_EXT */
-
-static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
- ulong msr);
-
-/* Some compatibility defines */
-#ifdef CONFIG_PPC_BOOK3S_32
-#define MSR_USER32 MSR_USER
-#define MSR_USER64 MSR_USER
-#define HW_PAGE_SIZE PAGE_SIZE
-#endif
struct kvm_stats_debugfs_item debugfs_entries[] = {
{ "exits", VCPU_STAT(sum_exits) },
{
}
-void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
-{
-#ifdef CONFIG_PPC_BOOK3S_64
- memcpy(to_svcpu(vcpu)->slb, to_book3s(vcpu)->slb_shadow, sizeof(to_svcpu(vcpu)->slb));
- memcpy(&get_paca()->shadow_vcpu, to_book3s(vcpu)->shadow_vcpu,
- sizeof(get_paca()->shadow_vcpu));
- to_svcpu(vcpu)->slb_max = to_book3s(vcpu)->slb_shadow_max;
-#endif
-
-#ifdef CONFIG_PPC_BOOK3S_32
- current->thread.kvm_shadow_vcpu = to_book3s(vcpu)->shadow_vcpu;
-#endif
-}
-
-void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
-{
-#ifdef CONFIG_PPC_BOOK3S_64
- memcpy(to_book3s(vcpu)->slb_shadow, to_svcpu(vcpu)->slb, sizeof(to_svcpu(vcpu)->slb));
- memcpy(to_book3s(vcpu)->shadow_vcpu, &get_paca()->shadow_vcpu,
- sizeof(get_paca()->shadow_vcpu));
- to_book3s(vcpu)->slb_shadow_max = to_svcpu(vcpu)->slb_max;
-#endif
-
- kvmppc_giveup_ext(vcpu, MSR_FP);
- kvmppc_giveup_ext(vcpu, MSR_VEC);
- kvmppc_giveup_ext(vcpu, MSR_VSX);
-}
-
-static void kvmppc_recalc_shadow_msr(struct kvm_vcpu *vcpu)
-{
- ulong smsr = vcpu->arch.shared->msr;
-
- /* Guest MSR values */
- smsr &= MSR_FE0 | MSR_FE1 | MSR_SF | MSR_SE | MSR_BE | MSR_DE;
- /* Process MSR values */
- smsr |= MSR_ME | MSR_RI | MSR_IR | MSR_DR | MSR_PR | MSR_EE;
- /* External providers the guest reserved */
- smsr |= (vcpu->arch.shared->msr & vcpu->arch.guest_owned_ext);
- /* 64-bit Process MSR values */
-#ifdef CONFIG_PPC_BOOK3S_64
- smsr |= MSR_ISF | MSR_HV;
-#endif
- vcpu->arch.shadow_msr = smsr;
-}
-
-void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
-{
- ulong old_msr = vcpu->arch.shared->msr;
-
-#ifdef EXIT_DEBUG
- printk(KERN_INFO "KVM: Set MSR to 0x%llx\n", msr);
-#endif
-
- msr &= to_book3s(vcpu)->msr_mask;
- vcpu->arch.shared->msr = msr;
- kvmppc_recalc_shadow_msr(vcpu);
-
- if (msr & MSR_POW) {
- if (!vcpu->arch.pending_exceptions) {
- kvm_vcpu_block(vcpu);
- vcpu->stat.halt_wakeup++;
-
- /* Unset POW bit after we woke up */
- msr &= ~MSR_POW;
- vcpu->arch.shared->msr = msr;
- }
- }
-
- if ((vcpu->arch.shared->msr & (MSR_PR|MSR_IR|MSR_DR)) !=
- (old_msr & (MSR_PR|MSR_IR|MSR_DR))) {
- kvmppc_mmu_flush_segments(vcpu);
- kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
-
- /* Preload magic page segment when in kernel mode */
- if (!(msr & MSR_PR) && vcpu->arch.magic_page_pa) {
- struct kvm_vcpu_arch *a = &vcpu->arch;
-
- if (msr & MSR_DR)
- kvmppc_mmu_map_segment(vcpu, a->magic_page_ea);
- else
- kvmppc_mmu_map_segment(vcpu, a->magic_page_pa);
- }
- }
-
- /* Preload FPU if it's enabled */
- if (vcpu->arch.shared->msr & MSR_FP)
- kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
-}
-
void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
{
vcpu->arch.shared->srr0 = kvmppc_get_pc(vcpu);
vcpu->arch.shared->srr1 = vcpu->arch.shared->msr | flags;
- kvmppc_set_pc(vcpu, to_book3s(vcpu)->hior + vec);
+ kvmppc_set_pc(vcpu, kvmppc_interrupt_offset(vcpu) + vec);
vcpu->arch.mmu.reset_msr(vcpu);
}
static void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
unsigned int vec)
{
+ unsigned long old_pending = vcpu->arch.pending_exceptions;
+
clear_bit(kvmppc_book3s_vec2irqprio(vec),
&vcpu->arch.pending_exceptions);
- if (!vcpu->arch.pending_exceptions)
- vcpu->arch.shared->int_pending = 0;
+ kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions,
+ old_pending);
}
void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
int deliver = 1;
int vec = 0;
ulong flags = 0ULL;
- ulong crit_raw = vcpu->arch.shared->critical;
- ulong crit_r1 = kvmppc_get_gpr(vcpu, 1);
- bool crit;
-
- /* Truncate crit indicators in 32 bit mode */
- if (!(vcpu->arch.shared->msr & MSR_SF)) {
- crit_raw &= 0xffffffff;
- crit_r1 &= 0xffffffff;
- }
-
- /* Critical section when crit == r1 */
- crit = (crit_raw == crit_r1);
- /* ... and we're in supervisor mode */
- crit = crit && !(vcpu->arch.shared->msr & MSR_PR);
+ bool crit = kvmppc_critical_section(vcpu);
switch (priority) {
case BOOK3S_IRQPRIO_DECREMENTER:
}
/* Tell the guest about our interrupt status */
- if (*pending)
- vcpu->arch.shared->int_pending = 1;
- else if (old_pending)
- vcpu->arch.shared->int_pending = 0;
-}
-
-void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr)
-{
- u32 host_pvr;
-
- vcpu->arch.hflags &= ~BOOK3S_HFLAG_SLB;
- vcpu->arch.pvr = pvr;
-#ifdef CONFIG_PPC_BOOK3S_64
- if ((pvr >= 0x330000) && (pvr < 0x70330000)) {
- kvmppc_mmu_book3s_64_init(vcpu);
- to_book3s(vcpu)->hior = 0xfff00000;
- to_book3s(vcpu)->msr_mask = 0xffffffffffffffffULL;
- } else
-#endif
- {
- kvmppc_mmu_book3s_32_init(vcpu);
- to_book3s(vcpu)->hior = 0;
- to_book3s(vcpu)->msr_mask = 0xffffffffULL;
- }
-
- /* If we are in hypervisor level on 970, we can tell the CPU to
- * treat DCBZ as 32 bytes store */
- vcpu->arch.hflags &= ~BOOK3S_HFLAG_DCBZ32;
- if (vcpu->arch.mmu.is_dcbz32(vcpu) && (mfmsr() & MSR_HV) &&
- !strcmp(cur_cpu_spec->platform, "ppc970"))
- vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
-
- /* Cell performs badly if MSR_FEx are set. So let's hope nobody
- really needs them in a VM on Cell and force disable them. */
- if (!strcmp(cur_cpu_spec->platform, "ppc-cell-be"))
- to_book3s(vcpu)->msr_mask &= ~(MSR_FE0 | MSR_FE1);
-
-#ifdef CONFIG_PPC_BOOK3S_32
- /* 32 bit Book3S always has 32 byte dcbz */
- vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
-#endif
-
- /* On some CPUs we can execute paired single operations natively */
- asm ( "mfpvr %0" : "=r"(host_pvr));
- switch (host_pvr) {
- case 0x00080200: /* lonestar 2.0 */
- case 0x00088202: /* lonestar 2.2 */
- case 0x70000100: /* gekko 1.0 */
- case 0x00080100: /* gekko 2.0 */
- case 0x00083203: /* gekko 2.3a */
- case 0x00083213: /* gekko 2.3b */
- case 0x00083204: /* gekko 2.4 */
- case 0x00083214: /* gekko 2.4e (8SE) - retail HW2 */
- case 0x00087200: /* broadway */
- vcpu->arch.hflags |= BOOK3S_HFLAG_NATIVE_PS;
- /* Enable HID2.PSE - in case we need it later */
- mtspr(SPRN_HID2_GEKKO, mfspr(SPRN_HID2_GEKKO) | (1 << 29));
- }
+ kvmppc_update_int_pending(vcpu, *pending, old_pending);
}
pfn_t kvmppc_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn)
return gfn_to_pfn(vcpu->kvm, gfn);
}
-/* Book3s_32 CPUs always have 32 bytes cache line size, which Linux assumes. To
- * make Book3s_32 Linux work on Book3s_64, we have to make sure we trap dcbz to
- * emulate 32 bytes dcbz length.
- *
- * The Book3s_64 inventors also realized this case and implemented a special bit
- * in the HID5 register, which is a hypervisor ressource. Thus we can't use it.
- *
- * My approach here is to patch the dcbz instruction on executing pages.
- */
-static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte)
-{
- struct page *hpage;
- u64 hpage_offset;
- u32 *page;
- int i;
-
- hpage = gfn_to_page(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
- if (is_error_page(hpage)) {
- kvm_release_page_clean(hpage);
- return;
- }
-
- hpage_offset = pte->raddr & ~PAGE_MASK;
- hpage_offset &= ~0xFFFULL;
- hpage_offset /= 4;
-
- get_page(hpage);
- page = kmap_atomic(hpage, KM_USER0);
-
- /* patch dcbz into reserved instruction, so we trap */
- for (i=hpage_offset; i < hpage_offset + (HW_PAGE_SIZE / 4); i++)
- if ((page[i] & 0xff0007ff) == INS_DCBZ)
- page[i] &= 0xfffffff7;
-
- kunmap_atomic(page, KM_USER0);
- put_page(hpage);
-}
-
static int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, bool data,
struct kvmppc_pte *pte)
{
return EMULATE_DO_MMIO;
}
-static int kvmppc_visible_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
-{
- ulong mp_pa = vcpu->arch.magic_page_pa;
-
- if (unlikely(mp_pa) &&
- unlikely((mp_pa & KVM_PAM) >> PAGE_SHIFT == gfn)) {
- return 1;
- }
-
- return kvm_is_visible_gfn(vcpu->kvm, gfn);
-}
-
-int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
- ulong eaddr, int vec)
-{
- bool data = (vec == BOOK3S_INTERRUPT_DATA_STORAGE);
- int r = RESUME_GUEST;
- int relocated;
- int page_found = 0;
- struct kvmppc_pte pte;
- bool is_mmio = false;
- bool dr = (vcpu->arch.shared->msr & MSR_DR) ? true : false;
- bool ir = (vcpu->arch.shared->msr & MSR_IR) ? true : false;
- u64 vsid;
-
- relocated = data ? dr : ir;
-
- /* Resolve real address if translation turned on */
- if (relocated) {
- page_found = vcpu->arch.mmu.xlate(vcpu, eaddr, &pte, data);
- } else {
- pte.may_execute = true;
- pte.may_read = true;
- pte.may_write = true;
- pte.raddr = eaddr & KVM_PAM;
- pte.eaddr = eaddr;
- pte.vpage = eaddr >> 12;
- }
-
- switch (vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) {
- case 0:
- pte.vpage |= ((u64)VSID_REAL << (SID_SHIFT - 12));
- break;
- case MSR_DR:
- case MSR_IR:
- vcpu->arch.mmu.esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid);
-
- if ((vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) == MSR_DR)
- pte.vpage |= ((u64)VSID_REAL_DR << (SID_SHIFT - 12));
- else
- pte.vpage |= ((u64)VSID_REAL_IR << (SID_SHIFT - 12));
- pte.vpage |= vsid;
-
- if (vsid == -1)
- page_found = -EINVAL;
- break;
- }
-
- if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
- (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
- /*
- * If we do the dcbz hack, we have to NX on every execution,
- * so we can patch the executing code. This renders our guest
- * NX-less.
- */
- pte.may_execute = !data;
- }
-
- if (page_found == -ENOENT) {
- /* Page not found in guest PTE entries */
- vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
- vcpu->arch.shared->dsisr = to_svcpu(vcpu)->fault_dsisr;
- vcpu->arch.shared->msr |=
- (to_svcpu(vcpu)->shadow_srr1 & 0x00000000f8000000ULL);
- kvmppc_book3s_queue_irqprio(vcpu, vec);
- } else if (page_found == -EPERM) {
- /* Storage protection */
- vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
- vcpu->arch.shared->dsisr =
- to_svcpu(vcpu)->fault_dsisr & ~DSISR_NOHPTE;
- vcpu->arch.shared->dsisr |= DSISR_PROTFAULT;
- vcpu->arch.shared->msr |=
- (to_svcpu(vcpu)->shadow_srr1 & 0x00000000f8000000ULL);
- kvmppc_book3s_queue_irqprio(vcpu, vec);
- } else if (page_found == -EINVAL) {
- /* Page not found in guest SLB */
- vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
- kvmppc_book3s_queue_irqprio(vcpu, vec + 0x80);
- } else if (!is_mmio &&
- kvmppc_visible_gfn(vcpu, pte.raddr >> PAGE_SHIFT)) {
- /* The guest's PTE is not mapped yet. Map on the host */
- kvmppc_mmu_map_page(vcpu, &pte);
- if (data)
- vcpu->stat.sp_storage++;
- else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
- (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32)))
- kvmppc_patch_dcbz(vcpu, &pte);
- } else {
- /* MMIO */
- vcpu->stat.mmio_exits++;
- vcpu->arch.paddr_accessed = pte.raddr;
- r = kvmppc_emulate_mmio(run, vcpu);
- if ( r == RESUME_HOST_NV )
- r = RESUME_HOST;
- }
-
- return r;
-}
-
-static inline int get_fpr_index(int i)
-{
-#ifdef CONFIG_VSX
- i *= 2;
-#endif
- return i;
-}
-
-/* Give up external provider (FPU, Altivec, VSX) */
-void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr)
-{
- struct thread_struct *t = ¤t->thread;
- u64 *vcpu_fpr = vcpu->arch.fpr;
-#ifdef CONFIG_VSX
- u64 *vcpu_vsx = vcpu->arch.vsr;
-#endif
- u64 *thread_fpr = (u64*)t->fpr;
- int i;
-
- if (!(vcpu->arch.guest_owned_ext & msr))
- return;
-
-#ifdef DEBUG_EXT
- printk(KERN_INFO "Giving up ext 0x%lx\n", msr);
-#endif
-
- switch (msr) {
- case MSR_FP:
- giveup_fpu(current);
- for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++)
- vcpu_fpr[i] = thread_fpr[get_fpr_index(i)];
-
- vcpu->arch.fpscr = t->fpscr.val;
- break;
- case MSR_VEC:
-#ifdef CONFIG_ALTIVEC
- giveup_altivec(current);
- memcpy(vcpu->arch.vr, t->vr, sizeof(vcpu->arch.vr));
- vcpu->arch.vscr = t->vscr;
-#endif
- break;
- case MSR_VSX:
-#ifdef CONFIG_VSX
- __giveup_vsx(current);
- for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr); i++)
- vcpu_vsx[i] = thread_fpr[get_fpr_index(i) + 1];
-#endif
- break;
- default:
- BUG();
- }
-
- vcpu->arch.guest_owned_ext &= ~msr;
- current->thread.regs->msr &= ~msr;
- kvmppc_recalc_shadow_msr(vcpu);
-}
-
-static int kvmppc_read_inst(struct kvm_vcpu *vcpu)
-{
- ulong srr0 = kvmppc_get_pc(vcpu);
- u32 last_inst = kvmppc_get_last_inst(vcpu);
- int ret;
-
- ret = kvmppc_ld(vcpu, &srr0, sizeof(u32), &last_inst, false);
- if (ret == -ENOENT) {
- ulong msr = vcpu->arch.shared->msr;
-
- msr = kvmppc_set_field(msr, 33, 33, 1);
- msr = kvmppc_set_field(msr, 34, 36, 0);
- vcpu->arch.shared->msr = kvmppc_set_field(msr, 42, 47, 0);
- kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
- return EMULATE_AGAIN;
- }
-
- return EMULATE_DONE;
-}
-
-static int kvmppc_check_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr)
-{
-
- /* Need to do paired single emulation? */
- if (!(vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE))
- return EMULATE_DONE;
-
- /* Read out the instruction */
- if (kvmppc_read_inst(vcpu) == EMULATE_DONE)
- /* Need to emulate */
- return EMULATE_FAIL;
-
- return EMULATE_AGAIN;
-}
-
-/* Handle external providers (FPU, Altivec, VSX) */
-static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
- ulong msr)
-{
- struct thread_struct *t = ¤t->thread;
- u64 *vcpu_fpr = vcpu->arch.fpr;
-#ifdef CONFIG_VSX
- u64 *vcpu_vsx = vcpu->arch.vsr;
-#endif
- u64 *thread_fpr = (u64*)t->fpr;
- int i;
-
- /* When we have paired singles, we emulate in software */
- if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE)
- return RESUME_GUEST;
-
- if (!(vcpu->arch.shared->msr & msr)) {
- kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
- return RESUME_GUEST;
- }
-
- /* We already own the ext */
- if (vcpu->arch.guest_owned_ext & msr) {
- return RESUME_GUEST;
- }
-
-#ifdef DEBUG_EXT
- printk(KERN_INFO "Loading up ext 0x%lx\n", msr);
-#endif
-
- current->thread.regs->msr |= msr;
-
- switch (msr) {
- case MSR_FP:
- for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++)
- thread_fpr[get_fpr_index(i)] = vcpu_fpr[i];
-
- t->fpscr.val = vcpu->arch.fpscr;
- t->fpexc_mode = 0;
- kvmppc_load_up_fpu();
- break;
- case MSR_VEC:
-#ifdef CONFIG_ALTIVEC
- memcpy(t->vr, vcpu->arch.vr, sizeof(vcpu->arch.vr));
- t->vscr = vcpu->arch.vscr;
- t->vrsave = -1;
- kvmppc_load_up_altivec();
-#endif
- break;
- case MSR_VSX:
-#ifdef CONFIG_VSX
- for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr); i++)
- thread_fpr[get_fpr_index(i) + 1] = vcpu_vsx[i];
- kvmppc_load_up_vsx();
-#endif
- break;
- default:
- BUG();
- }
-
- vcpu->arch.guest_owned_ext |= msr;
-
- kvmppc_recalc_shadow_msr(vcpu);
-
- return RESUME_GUEST;
-}
-
-int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
- unsigned int exit_nr)
-{
- int r = RESUME_HOST;
-
- vcpu->stat.sum_exits++;
-
- run->exit_reason = KVM_EXIT_UNKNOWN;
- run->ready_for_interrupt_injection = 1;
-
- trace_kvm_book3s_exit(exit_nr, vcpu);
- kvm_resched(vcpu);
- switch (exit_nr) {
- case BOOK3S_INTERRUPT_INST_STORAGE:
- vcpu->stat.pf_instruc++;
-
-#ifdef CONFIG_PPC_BOOK3S_32
- /* We set segments as unused segments when invalidating them. So
- * treat the respective fault as segment fault. */
- if (to_svcpu(vcpu)->sr[kvmppc_get_pc(vcpu) >> SID_SHIFT]
- == SR_INVALID) {
- kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
- r = RESUME_GUEST;
- break;
- }
-#endif
-
- /* only care about PTEG not found errors, but leave NX alone */
- if (to_svcpu(vcpu)->shadow_srr1 & 0x40000000) {
- r = kvmppc_handle_pagefault(run, vcpu, kvmppc_get_pc(vcpu), exit_nr);
- vcpu->stat.sp_instruc++;
- } else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
- (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
- /*
- * XXX If we do the dcbz hack we use the NX bit to flush&patch the page,
- * so we can't use the NX bit inside the guest. Let's cross our fingers,
- * that no guest that needs the dcbz hack does NX.
- */
- kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL);
- r = RESUME_GUEST;
- } else {
- vcpu->arch.shared->msr |=
- to_svcpu(vcpu)->shadow_srr1 & 0x58000000;
- kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
- r = RESUME_GUEST;
- }
- break;
- case BOOK3S_INTERRUPT_DATA_STORAGE:
- {
- ulong dar = kvmppc_get_fault_dar(vcpu);
- vcpu->stat.pf_storage++;
-
-#ifdef CONFIG_PPC_BOOK3S_32
- /* We set segments as unused segments when invalidating them. So
- * treat the respective fault as segment fault. */
- if ((to_svcpu(vcpu)->sr[dar >> SID_SHIFT]) == SR_INVALID) {
- kvmppc_mmu_map_segment(vcpu, dar);
- r = RESUME_GUEST;
- break;
- }
-#endif
-
- /* The only case we need to handle is missing shadow PTEs */
- if (to_svcpu(vcpu)->fault_dsisr & DSISR_NOHPTE) {
- r = kvmppc_handle_pagefault(run, vcpu, dar, exit_nr);
- } else {
- vcpu->arch.shared->dar = dar;
- vcpu->arch.shared->dsisr = to_svcpu(vcpu)->fault_dsisr;
- kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
- r = RESUME_GUEST;
- }
- break;
- }
- case BOOK3S_INTERRUPT_DATA_SEGMENT:
- if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_fault_dar(vcpu)) < 0) {
- vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
- kvmppc_book3s_queue_irqprio(vcpu,
- BOOK3S_INTERRUPT_DATA_SEGMENT);
- }
- r = RESUME_GUEST;
- break;
- case BOOK3S_INTERRUPT_INST_SEGMENT:
- if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu)) < 0) {
- kvmppc_book3s_queue_irqprio(vcpu,
- BOOK3S_INTERRUPT_INST_SEGMENT);
- }
- r = RESUME_GUEST;
- break;
- /* We're good on these - the host merely wanted to get our attention */
- case BOOK3S_INTERRUPT_DECREMENTER:
- vcpu->stat.dec_exits++;
- r = RESUME_GUEST;
- break;
- case BOOK3S_INTERRUPT_EXTERNAL:
- vcpu->stat.ext_intr_exits++;
- r = RESUME_GUEST;
- break;
- case BOOK3S_INTERRUPT_PERFMON:
- r = RESUME_GUEST;
- break;
- case BOOK3S_INTERRUPT_PROGRAM:
- {
- enum emulation_result er;
- ulong flags;
-
-program_interrupt:
- flags = to_svcpu(vcpu)->shadow_srr1 & 0x1f0000ull;
-
- if (vcpu->arch.shared->msr & MSR_PR) {
-#ifdef EXIT_DEBUG
- printk(KERN_INFO "Userspace triggered 0x700 exception at 0x%lx (0x%x)\n", kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu));
-#endif
- if ((kvmppc_get_last_inst(vcpu) & 0xff0007ff) !=
- (INS_DCBZ & 0xfffffff7)) {
- kvmppc_core_queue_program(vcpu, flags);
- r = RESUME_GUEST;
- break;
- }
- }
-
- vcpu->stat.emulated_inst_exits++;
- er = kvmppc_emulate_instruction(run, vcpu);
- switch (er) {
- case EMULATE_DONE:
- r = RESUME_GUEST_NV;
- break;
- case EMULATE_AGAIN:
- r = RESUME_GUEST;
- break;
- case EMULATE_FAIL:
- printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
- __func__, kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu));
- kvmppc_core_queue_program(vcpu, flags);
- r = RESUME_GUEST;
- break;
- case EMULATE_DO_MMIO:
- run->exit_reason = KVM_EXIT_MMIO;
- r = RESUME_HOST_NV;
- break;
- default:
- BUG();
- }
- break;
- }
- case BOOK3S_INTERRUPT_SYSCALL:
- if (vcpu->arch.osi_enabled &&
- (((u32)kvmppc_get_gpr(vcpu, 3)) == OSI_SC_MAGIC_R3) &&
- (((u32)kvmppc_get_gpr(vcpu, 4)) == OSI_SC_MAGIC_R4)) {
- /* MOL hypercalls */
- u64 *gprs = run->osi.gprs;
- int i;
-
- run->exit_reason = KVM_EXIT_OSI;
- for (i = 0; i < 32; i++)
- gprs[i] = kvmppc_get_gpr(vcpu, i);
- vcpu->arch.osi_needed = 1;
- r = RESUME_HOST_NV;
- } else if (!(vcpu->arch.shared->msr & MSR_PR) &&
- (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
- /* KVM PV hypercalls */
- kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
- r = RESUME_GUEST;
- } else {
- /* Guest syscalls */
- vcpu->stat.syscall_exits++;
- kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
- r = RESUME_GUEST;
- }
- break;
- case BOOK3S_INTERRUPT_FP_UNAVAIL:
- case BOOK3S_INTERRUPT_ALTIVEC:
- case BOOK3S_INTERRUPT_VSX:
- {
- int ext_msr = 0;
-
- switch (exit_nr) {
- case BOOK3S_INTERRUPT_FP_UNAVAIL: ext_msr = MSR_FP; break;
- case BOOK3S_INTERRUPT_ALTIVEC: ext_msr = MSR_VEC; break;
- case BOOK3S_INTERRUPT_VSX: ext_msr = MSR_VSX; break;
- }
-
- switch (kvmppc_check_ext(vcpu, exit_nr)) {
- case EMULATE_DONE:
- /* everything ok - let's enable the ext */
- r = kvmppc_handle_ext(vcpu, exit_nr, ext_msr);
- break;
- case EMULATE_FAIL:
- /* we need to emulate this instruction */
- goto program_interrupt;
- break;
- default:
- /* nothing to worry about - go again */
- break;
- }
- break;
- }
- case BOOK3S_INTERRUPT_ALIGNMENT:
- if (kvmppc_read_inst(vcpu) == EMULATE_DONE) {
- vcpu->arch.shared->dsisr = kvmppc_alignment_dsisr(vcpu,
- kvmppc_get_last_inst(vcpu));
- vcpu->arch.shared->dar = kvmppc_alignment_dar(vcpu,
- kvmppc_get_last_inst(vcpu));
- kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
- }
- r = RESUME_GUEST;
- break;
- case BOOK3S_INTERRUPT_MACHINE_CHECK:
- case BOOK3S_INTERRUPT_TRACE:
- kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
- r = RESUME_GUEST;
- break;
- default:
- /* Ugh - bork here! What did we get? */
- printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | msr=0x%lx\n",
- exit_nr, kvmppc_get_pc(vcpu), to_svcpu(vcpu)->shadow_srr1);
- r = RESUME_HOST;
- BUG();
- break;
- }
-
-
- if (!(r & RESUME_HOST)) {
- /* To avoid clobbering exit_reason, only check for signals if
- * we aren't already exiting to userspace for some other
- * reason. */
- if (signal_pending(current)) {
-#ifdef EXIT_DEBUG
- printk(KERN_EMERG "KVM: Going back to host\n");
-#endif
- vcpu->stat.signal_exits++;
- run->exit_reason = KVM_EXIT_INTR;
- r = -EINTR;
- } else {
- /* In case an interrupt came in that was triggered
- * from userspace (like DEC), we need to check what
- * to inject now! */
- kvmppc_core_deliver_interrupts(vcpu);
- }
- }
-
- trace_kvm_book3s_reenter(r, vcpu);
-
- return r;
-}
-
int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
{
return 0;
return 0;
}
-int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
- struct kvm_sregs *sregs)
-{
- struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
- int i;
-
- sregs->pvr = vcpu->arch.pvr;
-
- sregs->u.s.sdr1 = to_book3s(vcpu)->sdr1;
- if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
- for (i = 0; i < 64; i++) {
- sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige | i;
- sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv;
- }
- } else {
- for (i = 0; i < 16; i++)
- sregs->u.s.ppc32.sr[i] = vcpu->arch.shared->sr[i];
-
- for (i = 0; i < 8; i++) {
- sregs->u.s.ppc32.ibat[i] = vcpu3s->ibat[i].raw;
- sregs->u.s.ppc32.dbat[i] = vcpu3s->dbat[i].raw;
- }
- }
-
- return 0;
-}
-
-int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
- struct kvm_sregs *sregs)
-{
- struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
- int i;
-
- kvmppc_set_pvr(vcpu, sregs->pvr);
-
- vcpu3s->sdr1 = sregs->u.s.sdr1;
- if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
- for (i = 0; i < 64; i++) {
- vcpu->arch.mmu.slbmte(vcpu, sregs->u.s.ppc64.slb[i].slbv,
- sregs->u.s.ppc64.slb[i].slbe);
- }
- } else {
- for (i = 0; i < 16; i++) {
- vcpu->arch.mmu.mtsrin(vcpu, i, sregs->u.s.ppc32.sr[i]);
- }
- for (i = 0; i < 8; i++) {
- kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), false,
- (u32)sregs->u.s.ppc32.ibat[i]);
- kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), true,
- (u32)(sregs->u.s.ppc32.ibat[i] >> 32));
- kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), false,
- (u32)sregs->u.s.ppc32.dbat[i]);
- kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), true,
- (u32)(sregs->u.s.ppc32.dbat[i] >> 32));
- }
- }
-
- /* Flush the MMU after messing with the segments */
- kvmppc_mmu_pte_flush(vcpu, 0, 0);
-
- return 0;
-}
-
int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
{
return -ENOTSUPP;
mutex_unlock(&kvm->slots_lock);
return r;
}
-
-int kvmppc_core_check_processor_compat(void)
-{
- return 0;
-}
-
-struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
-{
- struct kvmppc_vcpu_book3s *vcpu_book3s;
- struct kvm_vcpu *vcpu;
- int err = -ENOMEM;
- unsigned long p;
-
- vcpu_book3s = vzalloc(sizeof(struct kvmppc_vcpu_book3s));
- if (!vcpu_book3s)
- goto out;
-
- vcpu_book3s->shadow_vcpu = (struct kvmppc_book3s_shadow_vcpu *)
- kzalloc(sizeof(*vcpu_book3s->shadow_vcpu), GFP_KERNEL);
- if (!vcpu_book3s->shadow_vcpu)
- goto free_vcpu;
-
- vcpu = &vcpu_book3s->vcpu;
- err = kvm_vcpu_init(vcpu, kvm, id);
- if (err)
- goto free_shadow_vcpu;
-
- p = __get_free_page(GFP_KERNEL|__GFP_ZERO);
- /* the real shared page fills the last 4k of our page */
- vcpu->arch.shared = (void*)(p + PAGE_SIZE - 4096);
- if (!p)
- goto uninit_vcpu;
-
- vcpu->arch.host_retip = kvm_return_point;
- vcpu->arch.host_msr = mfmsr();
-#ifdef CONFIG_PPC_BOOK3S_64
- /* default to book3s_64 (970fx) */
- vcpu->arch.pvr = 0x3C0301;
-#else
- /* default to book3s_32 (750) */
- vcpu->arch.pvr = 0x84202;
-#endif
- kvmppc_set_pvr(vcpu, vcpu->arch.pvr);
- vcpu->arch.slb_nr = 64;
-
- /* remember where some real-mode handlers are */
- vcpu->arch.trampoline_lowmem = __pa(kvmppc_handler_lowmem_trampoline);
- vcpu->arch.trampoline_enter = __pa(kvmppc_handler_trampoline_enter);
- vcpu->arch.highmem_handler = (ulong)kvmppc_handler_highmem;
-#ifdef CONFIG_PPC_BOOK3S_64
- vcpu->arch.rmcall = *(ulong*)kvmppc_rmcall;
-#else
- vcpu->arch.rmcall = (ulong)kvmppc_rmcall;
-#endif
-
- vcpu->arch.shadow_msr = MSR_USER64;
-
- err = kvmppc_mmu_init(vcpu);
- if (err < 0)
- goto uninit_vcpu;
-
- return vcpu;
-
-uninit_vcpu:
- kvm_vcpu_uninit(vcpu);
-free_shadow_vcpu:
- kfree(vcpu_book3s->shadow_vcpu);
-free_vcpu:
- vfree(vcpu_book3s);
-out:
- return ERR_PTR(err);
-}
-
-void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
-{
- struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
-
- free_page((unsigned long)vcpu->arch.shared & PAGE_MASK);
- kvm_vcpu_uninit(vcpu);
- kfree(vcpu_book3s->shadow_vcpu);
- vfree(vcpu_book3s);
-}
-
-extern int __kvmppc_vcpu_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
-int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
-{
- int ret;
- double fpr[32][TS_FPRWIDTH];
- unsigned int fpscr;
- int fpexc_mode;
-#ifdef CONFIG_ALTIVEC
- vector128 vr[32];
- vector128 vscr;
- unsigned long uninitialized_var(vrsave);
- int used_vr;
-#endif
-#ifdef CONFIG_VSX
- int used_vsr;
-#endif
- ulong ext_msr;
-
- /* No need to go into the guest when all we do is going out */
- if (signal_pending(current)) {
- kvm_run->exit_reason = KVM_EXIT_INTR;
- return -EINTR;
- }
-
- /* Save FPU state in stack */
- if (current->thread.regs->msr & MSR_FP)
- giveup_fpu(current);
- memcpy(fpr, current->thread.fpr, sizeof(current->thread.fpr));
- fpscr = current->thread.fpscr.val;
- fpexc_mode = current->thread.fpexc_mode;
-
-#ifdef CONFIG_ALTIVEC
- /* Save Altivec state in stack */
- used_vr = current->thread.used_vr;
- if (used_vr) {
- if (current->thread.regs->msr & MSR_VEC)
- giveup_altivec(current);
- memcpy(vr, current->thread.vr, sizeof(current->thread.vr));
- vscr = current->thread.vscr;
- vrsave = current->thread.vrsave;
- }
-#endif
-
-#ifdef CONFIG_VSX
- /* Save VSX state in stack */
- used_vsr = current->thread.used_vsr;
- if (used_vsr && (current->thread.regs->msr & MSR_VSX))
- __giveup_vsx(current);
-#endif
-
- /* Remember the MSR with disabled extensions */
- ext_msr = current->thread.regs->msr;
-
- /* XXX we get called with irq disabled - change that! */
- local_irq_enable();
-
- /* Preload FPU if it's enabled */
- if (vcpu->arch.shared->msr & MSR_FP)
- kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
-
- ret = __kvmppc_vcpu_entry(kvm_run, vcpu);
-
- local_irq_disable();
-
- current->thread.regs->msr = ext_msr;
-
- /* Make sure we save the guest FPU/Altivec/VSX state */
- kvmppc_giveup_ext(vcpu, MSR_FP);
- kvmppc_giveup_ext(vcpu, MSR_VEC);
- kvmppc_giveup_ext(vcpu, MSR_VSX);
-
- /* Restore FPU state from stack */
- memcpy(current->thread.fpr, fpr, sizeof(current->thread.fpr));
- current->thread.fpscr.val = fpscr;
- current->thread.fpexc_mode = fpexc_mode;
-
-#ifdef CONFIG_ALTIVEC
- /* Restore Altivec state from stack */
- if (used_vr && current->thread.used_vr) {
- memcpy(current->thread.vr, vr, sizeof(current->thread.vr));
- current->thread.vscr = vscr;
- current->thread.vrsave = vrsave;
- }
- current->thread.used_vr = used_vr;
-#endif
-
-#ifdef CONFIG_VSX
- current->thread.used_vsr = used_vsr;
-#endif
-
- return ret;
-}
-
-static int kvmppc_book3s_init(void)
-{
- int r;
-
- r = kvm_init(NULL, sizeof(struct kvmppc_vcpu_book3s), 0,
- THIS_MODULE);
-
- if (r)
- return r;
-
- r = kvmppc_mmu_hpte_sysinit();
-
- return r;
-}
-
-static void kvmppc_book3s_exit(void)
-{
- kvmppc_mmu_hpte_sysexit();
- kvm_exit();
-}
-
-module_init(kvmppc_book3s_init);
-module_exit(kvmppc_book3s_exit);
projects / karo-tx-linux.git / blobdiff