diff options
author | Stephen Rothwell <sfr@canb.auug.org.au> | 2011-03-01 13:20:02 +1100 |
---|---|---|
committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2011-03-01 13:20:02 +1100 |
commit | 5220c87d9995479df9aded33841d9d9bac523ece (patch) | |
tree | 9d8ef42cf1d1d6ecdc1b6255befa1a273cce450a /arch | |
parent | 21556da532a5c1f8e752164cb77a2d65875b3b02 (diff) | |
parent | dcac28c466a596d21ae8fdcbd5e4e645cfb32ede (diff) |
Merge remote-tracking branch 'kvm/linux-next'
Diffstat (limited to 'arch')
-rw-r--r-- | arch/alpha/include/asm/errno.h | 2 | ||||
-rw-r--r-- | arch/ia64/kvm/kvm-ia64.c | 2 | ||||
-rw-r--r-- | arch/mips/include/asm/errno.h | 2 | ||||
-rw-r--r-- | arch/parisc/include/asm/errno.h | 2 | ||||
-rw-r--r-- | arch/powerpc/kvm/book3s.c | 14 | ||||
-rw-r--r-- | arch/powerpc/kvm/booke.c | 14 | ||||
-rw-r--r-- | arch/sparc/include/asm/errno.h | 2 | ||||
-rw-r--r-- | arch/x86/include/asm/kvm_emulate.h | 1 | ||||
-rw-r--r-- | arch/x86/include/asm/kvm_host.h | 4 | ||||
-rw-r--r-- | arch/x86/include/asm/msr-index.h | 1 | ||||
-rw-r--r-- | arch/x86/kernel/kvm.c | 2 | ||||
-rw-r--r-- | arch/x86/kvm/emulate.c | 12 | ||||
-rw-r--r-- | arch/x86/kvm/i8259.c | 25 | ||||
-rw-r--r-- | arch/x86/kvm/lapic.c | 4 | ||||
-rw-r--r-- | arch/x86/kvm/mmu.c | 16 | ||||
-rw-r--r-- | arch/x86/kvm/svm.c | 22 | ||||
-rw-r--r-- | arch/x86/kvm/vmx.c | 101 | ||||
-rw-r--r-- | arch/x86/kvm/x86.c | 126 |
18 files changed, 198 insertions, 154 deletions
diff --git a/arch/alpha/include/asm/errno.h b/arch/alpha/include/asm/errno.h index 98099bda9370..e5f29ca28180 100644 --- a/arch/alpha/include/asm/errno.h +++ b/arch/alpha/include/asm/errno.h @@ -122,4 +122,6 @@ #define ERFKILL 138 /* Operation not possible due to RF-kill */ +#define EHWPOISON 139 /* Memory page has hardware error */ + #endif diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c index 70d224d4264c..8213efe1998c 100644 --- a/arch/ia64/kvm/kvm-ia64.c +++ b/arch/ia64/kvm/kvm-ia64.c @@ -662,6 +662,7 @@ again: goto vcpu_run_fail; srcu_read_unlock(&vcpu->kvm->srcu, idx); + vcpu->mode = IN_GUEST_MODE; kvm_guest_enter(); /* @@ -683,6 +684,7 @@ again: */ barrier(); kvm_guest_exit(); + vcpu->mode = OUTSIDE_GUEST_MODE; preempt_enable(); idx = srcu_read_lock(&vcpu->kvm->srcu); diff --git a/arch/mips/include/asm/errno.h b/arch/mips/include/asm/errno.h index a0efc73819e4..6dcd3583ed04 100644 --- a/arch/mips/include/asm/errno.h +++ b/arch/mips/include/asm/errno.h @@ -121,6 +121,8 @@ #define ERFKILL 167 /* Operation not possible due to RF-kill */ +#define EHWPOISON 168 /* Memory page has hardware error */ + #define EDQUOT 1133 /* Quota exceeded */ #ifdef __KERNEL__ diff --git a/arch/parisc/include/asm/errno.h b/arch/parisc/include/asm/errno.h index 9992abdd782d..135ad6047e51 100644 --- a/arch/parisc/include/asm/errno.h +++ b/arch/parisc/include/asm/errno.h @@ -122,4 +122,6 @@ #define ERFKILL 256 /* Operation not possible due to RF-kill */ +#define EHWPOISON 257 /* Memory page has hardware error */ + #endif diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c index badc983031b3..c961de40c676 100644 --- a/arch/powerpc/kvm/book3s.c +++ b/arch/powerpc/kvm/book3s.c @@ -1141,9 +1141,10 @@ int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) regs->sprg1 = vcpu->arch.shared->sprg1; regs->sprg2 = vcpu->arch.shared->sprg2; regs->sprg3 = vcpu->arch.shared->sprg3; - regs->sprg5 = vcpu->arch.sprg4; - regs->sprg6 = vcpu->arch.sprg5; - regs->sprg7 = vcpu->arch.sprg6; + regs->sprg4 = vcpu->arch.sprg4; + regs->sprg5 = vcpu->arch.sprg5; + regs->sprg6 = vcpu->arch.sprg6; + regs->sprg7 = vcpu->arch.sprg7; for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) regs->gpr[i] = kvmppc_get_gpr(vcpu, i); @@ -1167,9 +1168,10 @@ int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) vcpu->arch.shared->sprg1 = regs->sprg1; vcpu->arch.shared->sprg2 = regs->sprg2; vcpu->arch.shared->sprg3 = regs->sprg3; - vcpu->arch.sprg5 = regs->sprg4; - vcpu->arch.sprg6 = regs->sprg5; - vcpu->arch.sprg7 = regs->sprg6; + vcpu->arch.sprg4 = regs->sprg4; + vcpu->arch.sprg5 = regs->sprg5; + vcpu->arch.sprg6 = regs->sprg6; + vcpu->arch.sprg7 = regs->sprg7; for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) kvmppc_set_gpr(vcpu, i, regs->gpr[i]); diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c index 77575d08c818..ef76acb455c3 100644 --- a/arch/powerpc/kvm/booke.c +++ b/arch/powerpc/kvm/booke.c @@ -546,9 +546,10 @@ int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) regs->sprg1 = vcpu->arch.shared->sprg1; regs->sprg2 = vcpu->arch.shared->sprg2; regs->sprg3 = vcpu->arch.shared->sprg3; - regs->sprg5 = vcpu->arch.sprg4; - regs->sprg6 = vcpu->arch.sprg5; - regs->sprg7 = vcpu->arch.sprg6; + regs->sprg4 = vcpu->arch.sprg4; + regs->sprg5 = vcpu->arch.sprg5; + regs->sprg6 = vcpu->arch.sprg6; + regs->sprg7 = vcpu->arch.sprg7; for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) regs->gpr[i] = kvmppc_get_gpr(vcpu, i); @@ -572,9 +573,10 @@ int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) vcpu->arch.shared->sprg1 = regs->sprg1; vcpu->arch.shared->sprg2 = regs->sprg2; vcpu->arch.shared->sprg3 = regs->sprg3; - vcpu->arch.sprg5 = regs->sprg4; - vcpu->arch.sprg6 = regs->sprg5; - vcpu->arch.sprg7 = regs->sprg6; + vcpu->arch.sprg4 = regs->sprg4; + vcpu->arch.sprg5 = regs->sprg5; + vcpu->arch.sprg6 = regs->sprg6; + vcpu->arch.sprg7 = regs->sprg7; for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) kvmppc_set_gpr(vcpu, i, regs->gpr[i]); diff --git a/arch/sparc/include/asm/errno.h b/arch/sparc/include/asm/errno.h index 4e2bc490d714..c351aba997b7 100644 --- a/arch/sparc/include/asm/errno.h +++ b/arch/sparc/include/asm/errno.h @@ -112,4 +112,6 @@ #define ERFKILL 134 /* Operation not possible due to RF-kill */ +#define EHWPOISON 135 /* Memory page has hardware error */ + #endif diff --git a/arch/x86/include/asm/kvm_emulate.h b/arch/x86/include/asm/kvm_emulate.h index 8e37deb1eb38..50ebc327a368 100644 --- a/arch/x86/include/asm/kvm_emulate.h +++ b/arch/x86/include/asm/kvm_emulate.h @@ -239,6 +239,7 @@ struct x86_emulate_ctxt { int interruptibility; bool perm_ok; /* do not check permissions if true */ + bool only_vendor_specific_insn; bool have_exception; struct x86_exception exception; diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index ffd7f8d29187..37bd730ff852 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -85,7 +85,7 @@ #define ASYNC_PF_PER_VCPU 64 -extern spinlock_t kvm_lock; +extern raw_spinlock_t kvm_lock; extern struct list_head vm_list; struct kvm_vcpu; @@ -448,7 +448,7 @@ struct kvm_arch { unsigned long irq_sources_bitmap; s64 kvmclock_offset; - spinlock_t tsc_write_lock; + raw_spinlock_t tsc_write_lock; u64 last_tsc_nsec; u64 last_tsc_offset; u64 last_tsc_write; diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h index 43a18c77676d..d22611121ac7 100644 --- a/arch/x86/include/asm/msr-index.h +++ b/arch/x86/include/asm/msr-index.h @@ -43,6 +43,7 @@ #define MSR_MTRRcap 0x000000fe #define MSR_IA32_BBL_CR_CTL 0x00000119 +#define MSR_IA32_BBL_CR_CTL3 0x0000011e #define MSR_IA32_SYSENTER_CS 0x00000174 #define MSR_IA32_SYSENTER_ESP 0x00000175 diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c index 8dc44662394b..33c07b0b122e 100644 --- a/arch/x86/kernel/kvm.c +++ b/arch/x86/kernel/kvm.c @@ -493,7 +493,7 @@ static void __init kvm_smp_prepare_boot_cpu(void) native_smp_prepare_boot_cpu(); } -static void kvm_guest_cpu_online(void *dummy) +static void __cpuinit kvm_guest_cpu_online(void *dummy) { kvm_guest_cpu_init(); } diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index caf966781d25..a90d7e033304 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -76,6 +76,7 @@ #define Group (1<<14) /* Bits 3:5 of modrm byte extend opcode */ #define GroupDual (1<<15) /* Alternate decoding of mod == 3 */ /* Misc flags */ +#define VendorSpecific (1<<22) /* Vendor specific instruction */ #define NoAccess (1<<23) /* Don't access memory (lea/invlpg/verr etc) */ #define Op3264 (1<<24) /* Operand is 64b in long mode, 32b otherwise */ #define Undefined (1<<25) /* No Such Instruction */ @@ -2365,7 +2366,8 @@ static struct group_dual group7 = { { D(SrcMem16 | ModRM | Mov | Priv), D(SrcMem | ModRM | ByteOp | Priv | NoAccess), }, { - D(SrcNone | ModRM | Priv), N, N, D(SrcNone | ModRM | Priv), + D(SrcNone | ModRM | Priv | VendorSpecific), N, + N, D(SrcNone | ModRM | Priv | VendorSpecific), D(SrcNone | ModRM | DstMem | Mov), N, D(SrcMem16 | ModRM | Mov | Priv), N, } }; @@ -2489,7 +2491,7 @@ static struct opcode opcode_table[256] = { static struct opcode twobyte_table[256] = { /* 0x00 - 0x0F */ N, GD(0, &group7), N, N, - N, D(ImplicitOps), D(ImplicitOps | Priv), N, + N, D(ImplicitOps | VendorSpecific), D(ImplicitOps | Priv), N, D(ImplicitOps | Priv), D(ImplicitOps | Priv), N, N, N, D(ImplicitOps | ModRM), N, N, /* 0x10 - 0x1F */ @@ -2502,7 +2504,8 @@ static struct opcode twobyte_table[256] = { /* 0x30 - 0x3F */ D(ImplicitOps | Priv), I(ImplicitOps, em_rdtsc), D(ImplicitOps | Priv), N, - D(ImplicitOps), D(ImplicitOps | Priv), N, N, + D(ImplicitOps | VendorSpecific), D(ImplicitOps | Priv | VendorSpecific), + N, N, N, N, N, N, N, N, N, N, /* 0x40 - 0x4F */ X16(D(DstReg | SrcMem | ModRM | Mov)), @@ -2741,6 +2744,9 @@ done_prefixes: if (c->d == 0 || (c->d & Undefined)) return -1; + if (!(c->d & VendorSpecific) && ctxt->only_vendor_specific_insn) + return -1; + if (mode == X86EMUL_MODE_PROT64 && (c->d & Stack)) c->op_bytes = 8; diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c index 3cece05e4ac4..19fe855e7953 100644 --- a/arch/x86/kvm/i8259.c +++ b/arch/x86/kvm/i8259.c @@ -62,9 +62,6 @@ static void pic_unlock(struct kvm_pic *s) } if (!found) - found = s->kvm->bsp_vcpu; - - if (!found) return; kvm_make_request(KVM_REQ_EVENT, found); @@ -75,7 +72,6 @@ static void pic_unlock(struct kvm_pic *s) static void pic_clear_isr(struct kvm_kpic_state *s, int irq) { s->isr &= ~(1 << irq); - s->isr_ack |= (1 << irq); if (s != &s->pics_state->pics[0]) irq += 8; /* @@ -89,16 +85,6 @@ static void pic_clear_isr(struct kvm_kpic_state *s, int irq) pic_lock(s->pics_state); } -void kvm_pic_clear_isr_ack(struct kvm *kvm) -{ - struct kvm_pic *s = pic_irqchip(kvm); - - pic_lock(s); - s->pics[0].isr_ack = 0xff; - s->pics[1].isr_ack = 0xff; - pic_unlock(s); -} - /* * set irq level. If an edge is detected, then the IRR is set to 1 */ @@ -281,7 +267,6 @@ void kvm_pic_reset(struct kvm_kpic_state *s) s->irr = 0; s->imr = 0; s->isr = 0; - s->isr_ack = 0xff; s->priority_add = 0; s->irq_base = 0; s->read_reg_select = 0; @@ -545,15 +530,11 @@ static int picdev_read(struct kvm_io_device *this, */ static void pic_irq_request(struct kvm *kvm, int level) { - struct kvm_vcpu *vcpu = kvm->bsp_vcpu; struct kvm_pic *s = pic_irqchip(kvm); - int irq = pic_get_irq(&s->pics[0]); - s->output = level; - if (vcpu && level && (s->pics[0].isr_ack & (1 << irq))) { - s->pics[0].isr_ack &= ~(1 << irq); + if (!s->output) s->wakeup_needed = true; - } + s->output = level; } static const struct kvm_io_device_ops picdev_ops = { @@ -575,8 +556,6 @@ struct kvm_pic *kvm_create_pic(struct kvm *kvm) s->pics[1].elcr_mask = 0xde; s->pics[0].pics_state = s; s->pics[1].pics_state = s; - s->pics[0].isr_ack = 0xff; - s->pics[1].isr_ack = 0xff; /* * Initialize PIO device diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 93cf9d0d3653..0171e66e9994 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -417,10 +417,6 @@ static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode, case APIC_DM_INIT: if (level) { result = 1; - if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) - printk(KERN_DEBUG - "INIT on a runnable vcpu %d\n", - vcpu->vcpu_id); vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED; kvm_make_request(KVM_REQ_EVENT, vcpu); kvm_vcpu_kick(vcpu); diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index f02b8edc3d44..b6a9963400a7 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -3538,14 +3538,18 @@ void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot) if (!test_bit(slot, sp->slot_bitmap)) continue; - if (sp->role.level != PT_PAGE_TABLE_LEVEL) - continue; - pt = sp->spt; - for (i = 0; i < PT64_ENT_PER_PAGE; ++i) + for (i = 0; i < PT64_ENT_PER_PAGE; ++i) { + if (sp->role.level != PT_PAGE_TABLE_LEVEL + && is_large_pte(pt[i])) { + drop_spte(kvm, &pt[i], + shadow_trap_nonpresent_pte); + --kvm->stat.lpages; + } /* avoid RMW */ if (is_writable_pte(pt[i])) update_spte(&pt[i], pt[i] & ~PT_WRITABLE_MASK); + } } kvm_flush_remote_tlbs(kvm); } @@ -3583,7 +3587,7 @@ static int mmu_shrink(struct shrinker *shrink, int nr_to_scan, gfp_t gfp_mask) if (nr_to_scan == 0) goto out; - spin_lock(&kvm_lock); + raw_spin_lock(&kvm_lock); list_for_each_entry(kvm, &vm_list, vm_list) { int idx, freed_pages; @@ -3606,7 +3610,7 @@ static int mmu_shrink(struct shrinker *shrink, int nr_to_scan, gfp_t gfp_mask) if (kvm_freed) list_move_tail(&kvm_freed->vm_list, &vm_list); - spin_unlock(&kvm_lock); + raw_spin_unlock(&kvm_lock); out: return percpu_counter_read_positive(&kvm_total_used_mmu_pages); diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 63fec1531e89..8d61df4a02c7 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -135,6 +135,8 @@ struct vcpu_svm { u32 *msrpm; + ulong nmi_iret_rip; + struct nested_state nested; bool nmi_singlestep; @@ -2653,6 +2655,7 @@ static int iret_interception(struct vcpu_svm *svm) ++svm->vcpu.stat.nmi_window_exits; clr_intercept(svm, INTERCEPT_IRET); svm->vcpu.arch.hflags |= HF_IRET_MASK; + svm->nmi_iret_rip = kvm_rip_read(&svm->vcpu); return 1; } @@ -3474,7 +3477,12 @@ static void svm_complete_interrupts(struct vcpu_svm *svm) svm->int3_injected = 0; - if (svm->vcpu.arch.hflags & HF_IRET_MASK) { + /* + * If we've made progress since setting HF_IRET_MASK, we've + * executed an IRET and can allow NMI injection. + */ + if ((svm->vcpu.arch.hflags & HF_IRET_MASK) + && kvm_rip_read(&svm->vcpu) != svm->nmi_iret_rip) { svm->vcpu.arch.hflags &= ~(HF_NMI_MASK | HF_IRET_MASK); kvm_make_request(KVM_REQ_EVENT, &svm->vcpu); } @@ -3647,13 +3655,21 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu) local_irq_disable(); - stgi(); - vcpu->arch.cr2 = svm->vmcb->save.cr2; vcpu->arch.regs[VCPU_REGS_RAX] = svm->vmcb->save.rax; vcpu->arch.regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp; vcpu->arch.regs[VCPU_REGS_RIP] = svm->vmcb->save.rip; + if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI)) + kvm_before_handle_nmi(&svm->vcpu); + + stgi(); + + /* Any pending NMI will happen here */ + + if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI)) + kvm_after_handle_nmi(&svm->vcpu); + sync_cr8_to_lapic(vcpu); svm->next_rip = 0; diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index bf89ec2cfb82..e2b8c6b21ff2 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -93,14 +93,14 @@ module_param(yield_on_hlt, bool, S_IRUGO); * These 2 parameters are used to config the controls for Pause-Loop Exiting: * ple_gap: upper bound on the amount of time between two successive * executions of PAUSE in a loop. Also indicate if ple enabled. - * According to test, this time is usually small than 41 cycles. + * According to test, this time is usually smaller than 128 cycles. * ple_window: upper bound on the amount of time a guest is allowed to execute * in a PAUSE loop. Tests indicate that most spinlocks are held for * less than 2^12 cycles * Time is measured based on a counter that runs at the same rate as the TSC, * refer SDM volume 3b section 21.6.13 & 22.1.3. */ -#define KVM_VMX_DEFAULT_PLE_GAP 41 +#define KVM_VMX_DEFAULT_PLE_GAP 128 #define KVM_VMX_DEFAULT_PLE_WINDOW 4096 static int ple_gap = KVM_VMX_DEFAULT_PLE_GAP; module_param(ple_gap, int, S_IRUGO); @@ -176,7 +176,6 @@ static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu) return container_of(vcpu, struct vcpu_vmx, vcpu); } -static int init_rmode(struct kvm *kvm); static u64 construct_eptp(unsigned long root_hpa); static void kvm_cpu_vmxon(u64 addr); static void kvm_cpu_vmxoff(void); @@ -1333,19 +1332,25 @@ static __init int vmx_disabled_by_bios(void) rdmsrl(MSR_IA32_FEATURE_CONTROL, msr); if (msr & FEATURE_CONTROL_LOCKED) { + /* launched w/ TXT and VMX disabled */ if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX) && tboot_enabled()) return 1; + /* launched w/o TXT and VMX only enabled w/ TXT */ if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX) + && (msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX) && !tboot_enabled()) { printk(KERN_WARNING "kvm: disable TXT in the BIOS or " - " activate TXT before enabling KVM\n"); + "activate TXT before enabling KVM\n"); return 1; } + /* launched w/o TXT and VMX disabled */ + if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX) + && !tboot_enabled()) + return 1; } return 0; - /* locked but not enabled */ } static void kvm_cpu_vmxon(u64 addr) @@ -1683,6 +1688,7 @@ static void enter_pmode(struct kvm_vcpu *vcpu) vmx->emulation_required = 1; vmx->rmode.vm86_active = 0; + vmcs_write16(GUEST_TR_SELECTOR, vmx->rmode.tr.selector); vmcs_writel(GUEST_TR_BASE, vmx->rmode.tr.base); vmcs_write32(GUEST_TR_LIMIT, vmx->rmode.tr.limit); vmcs_write32(GUEST_TR_AR_BYTES, vmx->rmode.tr.ar); @@ -1756,6 +1762,7 @@ static void enter_rmode(struct kvm_vcpu *vcpu) vmx->emulation_required = 1; vmx->rmode.vm86_active = 1; + vmx->rmode.tr.selector = vmcs_read16(GUEST_TR_SELECTOR); vmx->rmode.tr.base = vmcs_readl(GUEST_TR_BASE); vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm)); @@ -1794,7 +1801,6 @@ static void enter_rmode(struct kvm_vcpu *vcpu) continue_rmode: kvm_mmu_reset_context(vcpu); - init_rmode(vcpu->kvm); } static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer) @@ -2030,23 +2036,40 @@ static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) vmcs_writel(GUEST_CR4, hw_cr4); } -static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg) -{ - struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; - - return vmcs_readl(sf->base); -} - static void vmx_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg) { + struct vcpu_vmx *vmx = to_vmx(vcpu); struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; + struct kvm_save_segment *save; u32 ar; + if (vmx->rmode.vm86_active + && (seg == VCPU_SREG_TR || seg == VCPU_SREG_ES + || seg == VCPU_SREG_DS || seg == VCPU_SREG_FS + || seg == VCPU_SREG_GS) + && !emulate_invalid_guest_state) { + switch (seg) { + case VCPU_SREG_TR: save = &vmx->rmode.tr; break; + case VCPU_SREG_ES: save = &vmx->rmode.es; break; + case VCPU_SREG_DS: save = &vmx->rmode.ds; break; + case VCPU_SREG_FS: save = &vmx->rmode.fs; break; + case VCPU_SREG_GS: save = &vmx->rmode.gs; break; + default: BUG(); + } + var->selector = save->selector; + var->base = save->base; + var->limit = save->limit; + ar = save->ar; + if (seg == VCPU_SREG_TR + || var->selector == vmcs_read16(sf->selector)) + goto use_saved_rmode_seg; + } var->base = vmcs_readl(sf->base); var->limit = vmcs_read32(sf->limit); var->selector = vmcs_read16(sf->selector); ar = vmcs_read32(sf->ar_bytes); +use_saved_rmode_seg: if ((ar & AR_UNUSABLE_MASK) && !emulate_invalid_guest_state) ar = 0; var->type = ar & 15; @@ -2060,6 +2083,18 @@ static void vmx_get_segment(struct kvm_vcpu *vcpu, var->unusable = (ar >> 16) & 1; } +static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg) +{ + struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; + struct kvm_segment s; + + if (to_vmx(vcpu)->rmode.vm86_active) { + vmx_get_segment(vcpu, &s, seg); + return s.base; + } + return vmcs_readl(sf->base); +} + static int vmx_get_cpl(struct kvm_vcpu *vcpu) { if (!is_protmode(vcpu)) @@ -2101,6 +2136,7 @@ static void vmx_set_segment(struct kvm_vcpu *vcpu, u32 ar; if (vmx->rmode.vm86_active && seg == VCPU_SREG_TR) { + vmcs_write16(sf->selector, var->selector); vmx->rmode.tr.selector = var->selector; vmx->rmode.tr.base = var->base; vmx->rmode.tr.limit = var->limit; @@ -2699,22 +2735,6 @@ static int vmx_vcpu_setup(struct vcpu_vmx *vmx) return 0; } -static int init_rmode(struct kvm *kvm) -{ - int idx, ret = 0; - - idx = srcu_read_lock(&kvm->srcu); - if (!init_rmode_tss(kvm)) - goto exit; - if (!init_rmode_identity_map(kvm)) - goto exit; - - ret = 1; -exit: - srcu_read_unlock(&kvm->srcu, idx); - return ret; -} - static int vmx_vcpu_reset(struct kvm_vcpu *vcpu) { struct vcpu_vmx *vmx = to_vmx(vcpu); @@ -2722,10 +2742,6 @@ static int vmx_vcpu_reset(struct kvm_vcpu *vcpu) int ret; vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP)); - if (!init_rmode(vmx->vcpu.kvm)) { - ret = -ENOMEM; - goto out; - } vmx->rmode.vm86_active = 0; @@ -2971,6 +2987,9 @@ static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr) if (ret) return ret; kvm->arch.tss_addr = addr; + if (!init_rmode_tss(kvm)) + return -ENOMEM; + return 0; } @@ -3962,7 +3981,7 @@ static void vmx_cancel_injection(struct kvm_vcpu *vcpu) #define Q "l" #endif -static void vmx_vcpu_run(struct kvm_vcpu *vcpu) +static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu) { struct vcpu_vmx *vmx = to_vmx(vcpu); @@ -3991,6 +4010,7 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu) asm( /* Store host registers */ "push %%"R"dx; push %%"R"bp;" + "push %%"R"cx \n\t" /* placeholder for guest rcx */ "push %%"R"cx \n\t" "cmp %%"R"sp, %c[host_rsp](%0) \n\t" "je 1f \n\t" @@ -4032,10 +4052,11 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu) ".Llaunched: " __ex(ASM_VMX_VMRESUME) "\n\t" ".Lkvm_vmx_return: " /* Save guest registers, load host registers, keep flags */ - "xchg %0, (%%"R"sp) \n\t" + "mov %0, %c[wordsize](%%"R"sp) \n\t" + "pop %0 \n\t" "mov %%"R"ax, %c[rax](%0) \n\t" "mov %%"R"bx, %c[rbx](%0) \n\t" - "push"Q" (%%"R"sp); pop"Q" %c[rcx](%0) \n\t" + "pop"Q" %c[rcx](%0) \n\t" "mov %%"R"dx, %c[rdx](%0) \n\t" "mov %%"R"si, %c[rsi](%0) \n\t" "mov %%"R"di, %c[rdi](%0) \n\t" @@ -4053,7 +4074,7 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu) "mov %%cr2, %%"R"ax \n\t" "mov %%"R"ax, %c[cr2](%0) \n\t" - "pop %%"R"bp; pop %%"R"bp; pop %%"R"dx \n\t" + "pop %%"R"bp; pop %%"R"dx \n\t" "setbe %c[fail](%0) \n\t" : : "c"(vmx), "d"((unsigned long)HOST_RSP), [launched]"i"(offsetof(struct vcpu_vmx, launched)), @@ -4076,7 +4097,8 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu) [r14]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R14])), [r15]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R15])), #endif - [cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2)) + [cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2)), + [wordsize]"i"(sizeof(ulong)) : "cc", "memory" , R"ax", R"bx", R"di", R"si" #ifdef CONFIG_X86_64 @@ -4183,8 +4205,11 @@ static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id) if (!kvm->arch.ept_identity_map_addr) kvm->arch.ept_identity_map_addr = VMX_EPT_IDENTITY_PAGETABLE_ADDR; + err = -ENOMEM; if (alloc_identity_pagetable(kvm) != 0) goto free_vmcs; + if (!init_rmode_identity_map(kvm)) + goto free_vmcs; } return &vmx->vcpu; diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index bcc0efce85bf..785ae0c300f7 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -81,9 +81,10 @@ * - enable LME and LMA per default on 64 bit KVM */ #ifdef CONFIG_X86_64 -static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffafeULL; +static +u64 __read_mostly efer_reserved_bits = ~((u64)(EFER_SCE | EFER_LME | EFER_LMA)); #else -static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffffeULL; +static u64 __read_mostly efer_reserved_bits = ~((u64)EFER_SCE); #endif #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM @@ -360,8 +361,8 @@ void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault) void kvm_inject_nmi(struct kvm_vcpu *vcpu) { + kvm_make_request(KVM_REQ_NMI, vcpu); kvm_make_request(KVM_REQ_EVENT, vcpu); - vcpu->arch.nmi_pending = 1; } EXPORT_SYMBOL_GPL(kvm_inject_nmi); @@ -525,8 +526,10 @@ int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) kvm_x86_ops->set_cr0(vcpu, cr0); - if ((cr0 ^ old_cr0) & X86_CR0_PG) + if ((cr0 ^ old_cr0) & X86_CR0_PG) { kvm_clear_async_pf_completion_queue(vcpu); + kvm_async_pf_hash_reset(vcpu); + } if ((cr0 ^ old_cr0) & update_bits) kvm_mmu_reset_context(vcpu); @@ -1017,7 +1020,7 @@ void kvm_write_tsc(struct kvm_vcpu *vcpu, u64 data) unsigned long flags; s64 sdiff; - spin_lock_irqsave(&kvm->arch.tsc_write_lock, flags); + raw_spin_lock_irqsave(&kvm->arch.tsc_write_lock, flags); offset = data - native_read_tsc(); ns = get_kernel_ns(); elapsed = ns - kvm->arch.last_tsc_nsec; @@ -1050,7 +1053,7 @@ void kvm_write_tsc(struct kvm_vcpu *vcpu, u64 data) kvm->arch.last_tsc_write = data; kvm->arch.last_tsc_offset = offset; kvm_x86_ops->write_tsc_offset(vcpu, offset); - spin_unlock_irqrestore(&kvm->arch.tsc_write_lock, flags); + raw_spin_unlock_irqrestore(&kvm->arch.tsc_write_lock, flags); /* Reset of TSC must disable overshoot protection below */ vcpu->arch.hv_clock.tsc_timestamp = 0; @@ -1453,6 +1456,14 @@ static int kvm_pv_enable_async_pf(struct kvm_vcpu *vcpu, u64 data) return 0; } +static void kvmclock_reset(struct kvm_vcpu *vcpu) +{ + if (vcpu->arch.time_page) { + kvm_release_page_dirty(vcpu->arch.time_page); + vcpu->arch.time_page = NULL; + } +} + int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) { switch (msr) { @@ -1510,10 +1521,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) break; case MSR_KVM_SYSTEM_TIME_NEW: case MSR_KVM_SYSTEM_TIME: { - if (vcpu->arch.time_page) { - kvm_release_page_dirty(vcpu->arch.time_page); - vcpu->arch.time_page = NULL; - } + kvmclock_reset(vcpu); vcpu->arch.time = data; kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); @@ -1592,6 +1600,12 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) } else return set_msr_hyperv(vcpu, msr, data); break; + case MSR_IA32_BBL_CR_CTL3: + /* Drop writes to this legacy MSR -- see rdmsr + * counterpart for further detail. + */ + pr_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", msr, data); + break; default: if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr)) return xen_hvm_config(vcpu, data); @@ -1846,6 +1860,19 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) } else return get_msr_hyperv(vcpu, msr, pdata); break; + case MSR_IA32_BBL_CR_CTL3: + /* This legacy MSR exists but isn't fully documented in current + * silicon. It is however accessed by winxp in very narrow + * scenarios where it sets bit #19, itself documented as + * a "reserved" bit. Best effort attempt to source coherent + * read data here should the balance of the register be + * interpreted by the guest: + * + * L2 cache control register 3: 64GB range, 256KB size, + * enabled, latency 0x1, configured + */ + data = 0xbe702111; + break; default: if (!ignore_msrs) { pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr); @@ -2575,9 +2602,6 @@ static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu, if (mce->status & MCI_STATUS_UC) { if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) || !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) { - printk(KERN_DEBUG "kvm: set_mce: " - "injects mce exception while " - "previous one is in progress!\n"); kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); return 0; } @@ -2648,8 +2672,6 @@ static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu, vcpu->arch.interrupt.pending = events->interrupt.injected; vcpu->arch.interrupt.nr = events->interrupt.nr; vcpu->arch.interrupt.soft = events->interrupt.soft; - if (vcpu->arch.interrupt.pending && irqchip_in_kernel(vcpu->kvm)) - kvm_pic_clear_isr_ack(vcpu->kvm); if (events->flags & KVM_VCPUEVENT_VALID_SHADOW) kvm_x86_ops->set_interrupt_shadow(vcpu, events->interrupt.shadow); @@ -4390,41 +4412,16 @@ int x86_emulate_instruction(struct kvm_vcpu *vcpu, vcpu->arch.emulate_ctxt.have_exception = false; vcpu->arch.emulate_ctxt.perm_ok = false; + vcpu->arch.emulate_ctxt.only_vendor_specific_insn + = emulation_type & EMULTYPE_TRAP_UD; + r = x86_decode_insn(&vcpu->arch.emulate_ctxt, insn, insn_len); - if (r == X86EMUL_PROPAGATE_FAULT) - goto done; trace_kvm_emulate_insn_start(vcpu); - - /* Only allow emulation of specific instructions on #UD - * (namely VMMCALL, sysenter, sysexit, syscall)*/ - if (emulation_type & EMULTYPE_TRAP_UD) { - if (!c->twobyte) - return EMULATE_FAIL; - switch (c->b) { - case 0x01: /* VMMCALL */ - if (c->modrm_mod != 3 || c->modrm_rm != 1) - return EMULATE_FAIL; - break; - case 0x34: /* sysenter */ - case 0x35: /* sysexit */ - if (c->modrm_mod != 0 || c->modrm_rm != 0) - return EMULATE_FAIL; - break; - case 0x05: /* syscall */ - if (c->modrm_mod != 0 || c->modrm_rm != 0) - return EMULATE_FAIL; - break; - default: - return EMULATE_FAIL; - } - - if (!(c->modrm_reg == 0 || c->modrm_reg == 3)) - return EMULATE_FAIL; - } - ++vcpu->stat.insn_emulation; if (r) { + if (emulation_type & EMULTYPE_TRAP_UD) + return EMULATE_FAIL; if (reexecute_instruction(vcpu, cr2)) return EMULATE_DONE; if (emulation_type & EMULTYPE_SKIP) @@ -4452,7 +4449,6 @@ restart: return handle_emulation_failure(vcpu); } -done: if (vcpu->arch.emulate_ctxt.have_exception) { inject_emulated_exception(vcpu); r = EMULATE_DONE; @@ -4562,7 +4558,7 @@ static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long va smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1); - spin_lock(&kvm_lock); + raw_spin_lock(&kvm_lock); list_for_each_entry(kvm, &vm_list, vm_list) { kvm_for_each_vcpu(i, vcpu, kvm) { if (vcpu->cpu != freq->cpu) @@ -4572,7 +4568,7 @@ static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long va send_ipi = 1; } } - spin_unlock(&kvm_lock); + raw_spin_unlock(&kvm_lock); if (freq->old < freq->new && send_ipi) { /* @@ -5185,6 +5181,8 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu) r = 1; goto out; } + if (kvm_check_request(KVM_REQ_NMI, vcpu)) + vcpu->arch.nmi_pending = true; } r = kvm_mmu_reload(vcpu); @@ -5213,14 +5211,18 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu) kvm_load_guest_fpu(vcpu); kvm_load_guest_xcr0(vcpu); - atomic_set(&vcpu->guest_mode, 1); - smp_wmb(); + vcpu->mode = IN_GUEST_MODE; + + /* We should set ->mode before check ->requests, + * see the comment in make_all_cpus_request. + */ + smp_mb(); local_irq_disable(); - if (!atomic_read(&vcpu->guest_mode) || vcpu->requests + if (vcpu->mode == EXITING_GUEST_MODE || vcpu->requests || need_resched() || signal_pending(current)) { - atomic_set(&vcpu->guest_mode, 0); + vcpu->mode = OUTSIDE_GUEST_MODE; smp_wmb(); local_irq_enable(); preempt_enable(); @@ -5256,7 +5258,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu) kvm_get_msr(vcpu, MSR_IA32_TSC, &vcpu->arch.last_guest_tsc); - atomic_set(&vcpu->guest_mode, 0); + vcpu->mode = OUTSIDE_GUEST_MODE; smp_wmb(); local_irq_enable(); @@ -5574,7 +5576,7 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) { int mmu_reset_needed = 0; - int pending_vec, max_bits; + int pending_vec, max_bits, idx; struct desc_ptr dt; dt.size = sregs->idt.limit; @@ -5603,10 +5605,13 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, kvm_x86_ops->set_cr4(vcpu, sregs->cr4); if (sregs->cr4 & X86_CR4_OSXSAVE) update_cpuid(vcpu); + + idx = srcu_read_lock(&vcpu->kvm->srcu); if (!is_long_mode(vcpu) && is_pae(vcpu)) { load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu)); mmu_reset_needed = 1; } + srcu_read_unlock(&vcpu->kvm->srcu, idx); if (mmu_reset_needed) kvm_mmu_reset_context(vcpu); @@ -5617,8 +5622,6 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, if (pending_vec < max_bits) { kvm_queue_interrupt(vcpu, pending_vec, false); pr_debug("Set back pending irq %d\n", pending_vec); - if (irqchip_in_kernel(vcpu->kvm)) - kvm_pic_clear_isr_ack(vcpu->kvm); } kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); @@ -5814,10 +5817,7 @@ void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) { - if (vcpu->arch.time_page) { - kvm_release_page_dirty(vcpu->arch.time_page); - vcpu->arch.time_page = NULL; - } + kvmclock_reset(vcpu); free_cpumask_var(vcpu->arch.wbinvd_dirty_mask); fx_free(vcpu); @@ -5878,6 +5878,8 @@ int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu) kvm_make_request(KVM_REQ_EVENT, vcpu); vcpu->arch.apf.msr_val = 0; + kvmclock_reset(vcpu); + kvm_clear_async_pf_completion_queue(vcpu); kvm_async_pf_hash_reset(vcpu); vcpu->arch.apf.halted = false; @@ -6005,7 +6007,7 @@ int kvm_arch_init_vm(struct kvm *kvm) /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); - spin_lock_init(&kvm->arch.tsc_write_lock); + raw_spin_lock_init(&kvm->arch.tsc_write_lock); return 0; } @@ -6157,7 +6159,7 @@ void kvm_vcpu_kick(struct kvm_vcpu *vcpu) me = get_cpu(); if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu)) - if (atomic_xchg(&vcpu->guest_mode, 0)) + if (kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE) smp_send_reschedule(cpu); put_cpu(); } |