diff options
Diffstat (limited to 'arch/powerpc/kvm/book3s.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s.c | 1008 |
1 files changed, 14 insertions, 994 deletions
diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c index 0f95b5cce03..a459479995c 100644 --- a/arch/powerpc/kvm/book3s.c +++ b/arch/powerpc/kvm/book3s.c @@ -16,8 +16,8 @@ #include <linux/kvm_host.h> #include <linux/err.h> +#include <linux/export.h> #include <linux/slab.h> -#include "trace.h" #include <asm/reg.h> #include <asm/cputable.h> @@ -28,25 +28,17 @@ #include <asm/kvm_ppc.h> #include <asm/kvm_book3s.h> #include <asm/mmu_context.h> +#include <asm/page.h> #include <linux/gfp.h> #include <linux/sched.h> #include <linux/vmalloc.h> #include <linux/highmem.h> +#include "trace.h" + #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) }, @@ -77,100 +69,11 @@ void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu) { } -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); } @@ -204,11 +107,13 @@ static int kvmppc_book3s_vec2irqprio(unsigned int vec) 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) @@ -225,8 +130,8 @@ void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec) void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags) { - to_book3s(vcpu)->prog_flags = flags; - kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_PROGRAM); + /* might as well deliver this straight away */ + kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags); } void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu) @@ -266,21 +171,7 @@ int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority) { 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: @@ -315,7 +206,6 @@ int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority) break; case BOOK3S_IRQPRIO_PROGRAM: vec = BOOK3S_INTERRUPT_PROGRAM; - flags = to_book3s(vcpu)->prog_flags; break; case BOOK3S_IRQPRIO_VSX: vec = BOOK3S_INTERRUPT_VSX; @@ -346,7 +236,7 @@ int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority) #endif if (deliver) - kvmppc_inject_interrupt(vcpu, vec, flags); + kvmppc_inject_interrupt(vcpu, vec, 0); return deliver; } @@ -392,64 +282,7 @@ void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu) } /* 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) @@ -471,44 +304,6 @@ 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) { @@ -606,519 +401,6 @@ mmio: 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; @@ -1179,69 +461,6 @@ int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) 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 = vcpu3s->slb[i].orige | i; - sregs->u.s.ppc64.slb[i].slbv = vcpu3s->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; @@ -1296,202 +515,3 @@ out: 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_book3s->slb_nr = 64; - - /* remember where some real-mode handlers are */ - vcpu->arch.trampoline_lowmem = kvmppc_trampoline_lowmem; - vcpu->arch.trampoline_enter = kvmppc_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); |