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Diffstat (limited to 'arch/x86/kvm')
-rw-r--r--arch/x86/kvm/emulate.c38
-rw-r--r--arch/x86/kvm/ioapic.c2
-rw-r--r--arch/x86/kvm/irq_comm.c13
-rw-r--r--arch/x86/kvm/vmx.c13
-rw-r--r--arch/x86/kvm/x86.c21
5 files changed, 56 insertions, 31 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index b9b09fec173b..f49e98062ea5 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -2093,16 +2093,10 @@ static int em_iret(struct x86_emulate_ctxt *ctxt)
static int em_jmp_far(struct x86_emulate_ctxt *ctxt)
{
int rc;
- unsigned short sel, old_sel;
- struct desc_struct old_desc, new_desc;
- const struct x86_emulate_ops *ops = ctxt->ops;
+ unsigned short sel;
+ struct desc_struct new_desc;
u8 cpl = ctxt->ops->cpl(ctxt);
- /* Assignment of RIP may only fail in 64-bit mode */
- if (ctxt->mode == X86EMUL_MODE_PROT64)
- ops->get_segment(ctxt, &old_sel, &old_desc, NULL,
- VCPU_SREG_CS);
-
memcpy(&sel, ctxt->src.valptr + ctxt->op_bytes, 2);
rc = __load_segment_descriptor(ctxt, sel, VCPU_SREG_CS, cpl,
@@ -2112,12 +2106,10 @@ static int em_jmp_far(struct x86_emulate_ctxt *ctxt)
return rc;
rc = assign_eip_far(ctxt, ctxt->src.val, &new_desc);
- if (rc != X86EMUL_CONTINUE) {
- WARN_ON(ctxt->mode != X86EMUL_MODE_PROT64);
- /* assigning eip failed; restore the old cs */
- ops->set_segment(ctxt, old_sel, &old_desc, 0, VCPU_SREG_CS);
- return rc;
- }
+ /* Error handling is not implemented. */
+ if (rc != X86EMUL_CONTINUE)
+ return X86EMUL_UNHANDLEABLE;
+
return rc;
}
@@ -2177,14 +2169,8 @@ static int em_ret_far(struct x86_emulate_ctxt *ctxt)
{
int rc;
unsigned long eip, cs;
- u16 old_cs;
int cpl = ctxt->ops->cpl(ctxt);
- struct desc_struct old_desc, new_desc;
- const struct x86_emulate_ops *ops = ctxt->ops;
-
- if (ctxt->mode == X86EMUL_MODE_PROT64)
- ops->get_segment(ctxt, &old_cs, &old_desc, NULL,
- VCPU_SREG_CS);
+ struct desc_struct new_desc;
rc = emulate_pop(ctxt, &eip, ctxt->op_bytes);
if (rc != X86EMUL_CONTINUE)
@@ -2201,10 +2187,10 @@ static int em_ret_far(struct x86_emulate_ctxt *ctxt)
if (rc != X86EMUL_CONTINUE)
return rc;
rc = assign_eip_far(ctxt, eip, &new_desc);
- if (rc != X86EMUL_CONTINUE) {
- WARN_ON(ctxt->mode != X86EMUL_MODE_PROT64);
- ops->set_segment(ctxt, old_cs, &old_desc, 0, VCPU_SREG_CS);
- }
+ /* Error handling is not implemented. */
+ if (rc != X86EMUL_CONTINUE)
+ return X86EMUL_UNHANDLEABLE;
+
return rc;
}
@@ -5033,7 +5019,7 @@ done_prefixes:
/* Decode and fetch the destination operand: register or memory. */
rc = decode_operand(ctxt, &ctxt->dst, (ctxt->d >> DstShift) & OpMask);
- if (ctxt->rip_relative)
+ if (ctxt->rip_relative && likely(ctxt->memopp))
ctxt->memopp->addr.mem.ea = address_mask(ctxt,
ctxt->memopp->addr.mem.ea + ctxt->_eip);
diff --git a/arch/x86/kvm/ioapic.c b/arch/x86/kvm/ioapic.c
index 88d0a92d3f94..3aab53f8cad2 100644
--- a/arch/x86/kvm/ioapic.c
+++ b/arch/x86/kvm/ioapic.c
@@ -580,7 +580,7 @@ static void kvm_ioapic_reset(struct kvm_ioapic *ioapic)
ioapic->irr = 0;
ioapic->irr_delivered = 0;
ioapic->id = 0;
- memset(ioapic->irq_eoi, 0x00, IOAPIC_NUM_PINS);
+ memset(ioapic->irq_eoi, 0x00, sizeof(ioapic->irq_eoi));
rtc_irq_eoi_tracking_reset(ioapic);
}
diff --git a/arch/x86/kvm/irq_comm.c b/arch/x86/kvm/irq_comm.c
index 84b96d319909..d09544e826f6 100644
--- a/arch/x86/kvm/irq_comm.c
+++ b/arch/x86/kvm/irq_comm.c
@@ -38,6 +38,15 @@ static int kvm_set_pic_irq(struct kvm_kernel_irq_routing_entry *e,
bool line_status)
{
struct kvm_pic *pic = pic_irqchip(kvm);
+
+ /*
+ * XXX: rejecting pic routes when pic isn't in use would be better,
+ * but the default routing table is installed while kvm->arch.vpic is
+ * NULL and KVM_CREATE_IRQCHIP can race with KVM_IRQ_LINE.
+ */
+ if (!pic)
+ return -1;
+
return kvm_pic_set_irq(pic, e->irqchip.pin, irq_source_id, level);
}
@@ -46,6 +55,10 @@ static int kvm_set_ioapic_irq(struct kvm_kernel_irq_routing_entry *e,
bool line_status)
{
struct kvm_ioapic *ioapic = kvm->arch.vioapic;
+
+ if (!ioapic)
+ return -1;
+
return kvm_ioapic_set_irq(ioapic, e->irqchip.pin, irq_source_id, level,
line_status);
}
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 4589b6feeb7b..268df707b5ce 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -408,6 +408,7 @@ struct nested_vmx {
struct list_head vmcs02_pool;
int vmcs02_num;
u64 vmcs01_tsc_offset;
+ bool change_vmcs01_virtual_x2apic_mode;
/* L2 must run next, and mustn't decide to exit to L1. */
bool nested_run_pending;
/*
@@ -8184,6 +8185,12 @@ static void vmx_set_virtual_x2apic_mode(struct kvm_vcpu *vcpu, bool set)
{
u32 sec_exec_control;
+ /* Postpone execution until vmcs01 is the current VMCS. */
+ if (is_guest_mode(vcpu)) {
+ to_vmx(vcpu)->nested.change_vmcs01_virtual_x2apic_mode = true;
+ return;
+ }
+
/*
* There is not point to enable virtualize x2apic without enable
* apicv
@@ -10483,6 +10490,12 @@ static void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason,
/* Update TSC_OFFSET if TSC was changed while L2 ran */
vmcs_write64(TSC_OFFSET, vmx->nested.vmcs01_tsc_offset);
+ if (vmx->nested.change_vmcs01_virtual_x2apic_mode) {
+ vmx->nested.change_vmcs01_virtual_x2apic_mode = false;
+ vmx_set_virtual_x2apic_mode(vcpu,
+ vcpu->arch.apic_base & X2APIC_ENABLE);
+ }
+
/* This is needed for same reason as it was needed in prepare_vmcs02 */
vmx->host_rsp = 0;
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index be222666b1c2..7429d481a311 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -199,7 +199,18 @@ static void kvm_on_user_return(struct user_return_notifier *urn)
struct kvm_shared_msrs *locals
= container_of(urn, struct kvm_shared_msrs, urn);
struct kvm_shared_msr_values *values;
+ unsigned long flags;
+ /*
+ * Disabling irqs at this point since the following code could be
+ * interrupted and executed through kvm_arch_hardware_disable()
+ */
+ local_irq_save(flags);
+ if (locals->registered) {
+ locals->registered = false;
+ user_return_notifier_unregister(urn);
+ }
+ local_irq_restore(flags);
for (slot = 0; slot < shared_msrs_global.nr; ++slot) {
values = &locals->values[slot];
if (values->host != values->curr) {
@@ -207,8 +218,6 @@ static void kvm_on_user_return(struct user_return_notifier *urn)
values->curr = values->host;
}
}
- locals->registered = false;
- user_return_notifier_unregister(urn);
}
static void shared_msr_update(unsigned slot, u32 msr)
@@ -2735,7 +2744,6 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
}
kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu);
- vcpu->arch.switch_db_regs |= KVM_DEBUGREG_RELOAD;
}
void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
@@ -3318,6 +3326,7 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
};
case KVM_SET_VAPIC_ADDR: {
struct kvm_vapic_addr va;
+ int idx;
r = -EINVAL;
if (!lapic_in_kernel(vcpu))
@@ -3325,7 +3334,9 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
r = -EFAULT;
if (copy_from_user(&va, argp, sizeof va))
goto out;
+ idx = srcu_read_lock(&vcpu->kvm->srcu);
r = kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr);
+ srcu_read_unlock(&vcpu->kvm->srcu, idx);
break;
}
case KVM_X86_SETUP_MCE: {
@@ -7253,10 +7264,12 @@ void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
{
+ void *wbinvd_dirty_mask = vcpu->arch.wbinvd_dirty_mask;
+
kvmclock_reset(vcpu);
- free_cpumask_var(vcpu->arch.wbinvd_dirty_mask);
kvm_x86_ops->vcpu_free(vcpu);
+ free_cpumask_var(wbinvd_dirty_mask);
}
struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
generated by cgit v1.2.3 (git 2.25.1) at 2025-12-10 13:31:09 +0000