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Diffstat (limited to 'arch/x86/kvm/x86.c')
-rw-r--r--arch/x86/kvm/x86.c94
1 files changed, 67 insertions, 27 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 03869eb7fcd6..34c85aa2e2d1 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2006,10 +2006,12 @@ static void kvmclock_sync_fn(struct work_struct *work)
KVMCLOCK_SYNC_PERIOD);
}
-static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data)
+static int set_msr_mce(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
{
u64 mcg_cap = vcpu->arch.mcg_cap;
unsigned bank_num = mcg_cap & 0xff;
+ u32 msr = msr_info->index;
+ u64 data = msr_info->data;
switch (msr) {
case MSR_IA32_MCG_STATUS:
@@ -2034,6 +2036,9 @@ static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data)
if ((offset & 0x3) == 0 &&
data != 0 && (data | (1 << 10)) != ~(u64)0)
return -1;
+ if (!msr_info->host_initiated &&
+ (offset & 0x3) == 1 && data != 0)
+ return -1;
vcpu->arch.mce_banks[offset] = data;
break;
}
@@ -2283,7 +2288,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
case MSR_IA32_MCG_CTL:
case MSR_IA32_MCG_STATUS:
case MSR_IA32_MC0_CTL ... MSR_IA32_MCx_CTL(KVM_MAX_MCE_BANKS) - 1:
- return set_msr_mce(vcpu, msr, data);
+ return set_msr_mce(vcpu, msr_info);
case MSR_K7_PERFCTR0 ... MSR_K7_PERFCTR3:
case MSR_P6_PERFCTR0 ... MSR_P6_PERFCTR1:
@@ -4034,10 +4039,16 @@ long kvm_arch_vm_ioctl(struct file *filp,
case KVM_SET_IDENTITY_MAP_ADDR: {
u64 ident_addr;
+ mutex_lock(&kvm->lock);
+ r = -EINVAL;
+ if (kvm->created_vcpus)
+ goto set_identity_unlock;
r = -EFAULT;
if (copy_from_user(&ident_addr, argp, sizeof ident_addr))
- goto out;
+ goto set_identity_unlock;
r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr);
+set_identity_unlock:
+ mutex_unlock(&kvm->lock);
break;
}
case KVM_SET_NR_MMU_PAGES:
@@ -5275,6 +5286,11 @@ static void emulator_set_hflags(struct x86_emulate_ctxt *ctxt, unsigned emul_fla
kvm_set_hflags(emul_to_vcpu(ctxt), emul_flags);
}
+static int emulator_pre_leave_smm(struct x86_emulate_ctxt *ctxt, u64 smbase)
+{
+ return kvm_x86_ops->pre_leave_smm(emul_to_vcpu(ctxt), smbase);
+}
+
static const struct x86_emulate_ops emulate_ops = {
.read_gpr = emulator_read_gpr,
.write_gpr = emulator_write_gpr,
@@ -5316,6 +5332,7 @@ static const struct x86_emulate_ops emulate_ops = {
.set_nmi_mask = emulator_set_nmi_mask,
.get_hflags = emulator_get_hflags,
.set_hflags = emulator_set_hflags,
+ .pre_leave_smm = emulator_pre_leave_smm,
};
static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask)
@@ -6426,7 +6443,7 @@ static int inject_pending_event(struct kvm_vcpu *vcpu, bool req_int_win)
}
kvm_x86_ops->queue_exception(vcpu);
- } else if (vcpu->arch.smi_pending && !is_smm(vcpu)) {
+ } else if (vcpu->arch.smi_pending && !is_smm(vcpu) && kvm_x86_ops->smi_allowed(vcpu)) {
vcpu->arch.smi_pending = false;
enter_smm(vcpu);
} else if (vcpu->arch.nmi_pending && kvm_x86_ops->nmi_allowed(vcpu)) {
@@ -6473,9 +6490,6 @@ static void process_nmi(struct kvm_vcpu *vcpu)
kvm_make_request(KVM_REQ_EVENT, vcpu);
}
-#define put_smstate(type, buf, offset, val) \
- *(type *)((buf) + (offset) - 0x7e00) = val
-
static u32 enter_smm_get_segment_flags(struct kvm_segment *seg)
{
u32 flags = 0;
@@ -6641,13 +6655,20 @@ static void enter_smm(struct kvm_vcpu *vcpu)
u32 cr0;
trace_kvm_enter_smm(vcpu->vcpu_id, vcpu->arch.smbase, true);
- vcpu->arch.hflags |= HF_SMM_MASK;
memset(buf, 0, 512);
if (guest_cpuid_has(vcpu, X86_FEATURE_LM))
enter_smm_save_state_64(vcpu, buf);
else
enter_smm_save_state_32(vcpu, buf);
+ /*
+ * Give pre_enter_smm() a chance to make ISA-specific changes to the
+ * vCPU state (e.g. leave guest mode) after we've saved the state into
+ * the SMM state-save area.
+ */
+ kvm_x86_ops->pre_enter_smm(vcpu, buf);
+
+ vcpu->arch.hflags |= HF_SMM_MASK;
kvm_vcpu_write_guest(vcpu, vcpu->arch.smbase + 0xfe00, buf, sizeof(buf));
if (kvm_x86_ops->get_nmi_mask(vcpu))
@@ -6876,17 +6897,23 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
if (inject_pending_event(vcpu, req_int_win) != 0)
req_immediate_exit = true;
else {
- /* Enable NMI/IRQ window open exits if needed.
+ /* Enable SMI/NMI/IRQ window open exits if needed.
*
- * SMIs have two cases: 1) they can be nested, and
- * then there is nothing to do here because RSM will
- * cause a vmexit anyway; 2) or the SMI can be pending
- * because inject_pending_event has completed the
- * injection of an IRQ or NMI from the previous vmexit,
- * and then we request an immediate exit to inject the SMI.
+ * SMIs have three cases:
+ * 1) They can be nested, and then there is nothing to
+ * do here because RSM will cause a vmexit anyway.
+ * 2) There is an ISA-specific reason why SMI cannot be
+ * injected, and the moment when this changes can be
+ * intercepted.
+ * 3) Or the SMI can be pending because
+ * inject_pending_event has completed the injection
+ * of an IRQ or NMI from the previous vmexit, and
+ * then we request an immediate exit to inject the
+ * SMI.
*/
if (vcpu->arch.smi_pending && !is_smm(vcpu))
- req_immediate_exit = true;
+ if (!kvm_x86_ops->enable_smi_window(vcpu))
+ req_immediate_exit = true;
if (vcpu->arch.nmi_pending)
kvm_x86_ops->enable_nmi_window(vcpu);
if (kvm_cpu_has_injectable_intr(vcpu) || req_int_win)
@@ -7798,18 +7825,40 @@ void kvm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event)
kvm_async_pf_hash_reset(vcpu);
vcpu->arch.apf.halted = false;
+ if (kvm_mpx_supported()) {
+ void *mpx_state_buffer;
+
+ /*
+ * To avoid have the INIT path from kvm_apic_has_events() that be
+ * called with loaded FPU and does not let userspace fix the state.
+ */
+ kvm_put_guest_fpu(vcpu);
+ mpx_state_buffer = get_xsave_addr(&vcpu->arch.guest_fpu.state.xsave,
+ XFEATURE_MASK_BNDREGS);
+ if (mpx_state_buffer)
+ memset(mpx_state_buffer, 0, sizeof(struct mpx_bndreg_state));
+ mpx_state_buffer = get_xsave_addr(&vcpu->arch.guest_fpu.state.xsave,
+ XFEATURE_MASK_BNDCSR);
+ if (mpx_state_buffer)
+ memset(mpx_state_buffer, 0, sizeof(struct mpx_bndcsr));
+ }
+
if (!init_event) {
kvm_pmu_reset(vcpu);
vcpu->arch.smbase = 0x30000;
vcpu->arch.msr_platform_info = MSR_PLATFORM_INFO_CPUID_FAULT;
vcpu->arch.msr_misc_features_enables = 0;
+
+ vcpu->arch.xcr0 = XFEATURE_MASK_FP;
}
memset(vcpu->arch.regs, 0, sizeof(vcpu->arch.regs));
vcpu->arch.regs_avail = ~0;
vcpu->arch.regs_dirty = ~0;
+ vcpu->arch.ia32_xss = 0;
+
kvm_x86_ops->vcpu_reset(vcpu, init_event);
}
@@ -7974,16 +8023,11 @@ EXPORT_SYMBOL_GPL(kvm_no_apic_vcpu);
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
{
struct page *page;
- struct kvm *kvm;
int r;
- BUG_ON(vcpu->kvm == NULL);
- kvm = vcpu->kvm;
-
vcpu->arch.apicv_active = kvm_x86_ops->get_enable_apicv(vcpu);
- vcpu->arch.pv.pv_unhalted = false;
vcpu->arch.emulate_ctxt.ops = &emulate_ops;
- if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_reset_bsp(vcpu))
+ if (!irqchip_in_kernel(vcpu->kvm) || kvm_vcpu_is_reset_bsp(vcpu))
vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
else
vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED;
@@ -8001,7 +8045,7 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
if (r < 0)
goto fail_free_pio_data;
- if (irqchip_in_kernel(kvm)) {
+ if (irqchip_in_kernel(vcpu->kvm)) {
r = kvm_create_lapic(vcpu);
if (r < 0)
goto fail_mmu_destroy;
@@ -8023,10 +8067,6 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
fx_init(vcpu);
- vcpu->arch.ia32_tsc_adjust_msr = 0x0;
- vcpu->arch.pv_time_enabled = false;
-
- vcpu->arch.guest_supported_xcr0 = 0;
vcpu->arch.guest_xstate_size = XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET;
vcpu->arch.maxphyaddr = cpuid_query_maxphyaddr(vcpu);
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-19 16:15:59 +0300