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Message-Id: <20220614204730.3359543-13-seanjc@google.com>
Date: Tue, 14 Jun 2022 20:47:21 +0000
From: Sean Christopherson <seanjc@...gle.com>
To: Paolo Bonzini <pbonzini@...hat.com>
Cc: Sean Christopherson <seanjc@...gle.com>,
Vitaly Kuznetsov <vkuznets@...hat.com>,
Wanpeng Li <wanpengli@...cent.com>,
Jim Mattson <jmattson@...gle.com>,
Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
linux-kernel@...r.kernel.org, Oliver Upton <oupton@...gle.com>,
Peter Shier <pshier@...gle.com>
Subject: [PATCH v2 12/21] KVM: x86: Make kvm_queued_exception a properly
named, visible struct
Move the definition of "struct kvm_queued_exception" out of kvm_vcpu_arch
in anticipation of adding a second instance in kvm_vcpu_arch to handle
exceptions that occur when vectoring an injected exception and are
morphed to VM-Exit instead of leading to #DF.
Opportunistically take advantage of the churn to rename "nr" to "vector".
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
arch/x86/include/asm/kvm_host.h | 23 +++++-----
arch/x86/kvm/svm/nested.c | 45 ++++++++++---------
arch/x86/kvm/svm/svm.c | 14 +++---
arch/x86/kvm/vmx/nested.c | 42 +++++++++--------
arch/x86/kvm/vmx/vmx.c | 20 ++++-----
arch/x86/kvm/x86.c | 80 ++++++++++++++++-----------------
arch/x86/kvm/x86.h | 3 +-
7 files changed, 111 insertions(+), 116 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 16a7f91cdf75..7f321d53a7e9 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -640,6 +640,17 @@ struct kvm_vcpu_xen {
struct timer_list poll_timer;
};
+struct kvm_queued_exception {
+ bool pending;
+ bool injected;
+ bool has_error_code;
+ u8 vector;
+ u32 error_code;
+ unsigned long payload;
+ bool has_payload;
+ u8 nested_apf;
+};
+
struct kvm_vcpu_arch {
/*
* rip and regs accesses must go through
@@ -739,16 +750,8 @@ struct kvm_vcpu_arch {
u8 event_exit_inst_len;
- struct kvm_queued_exception {
- bool pending;
- bool injected;
- bool has_error_code;
- u8 nr;
- u32 error_code;
- unsigned long payload;
- bool has_payload;
- u8 nested_apf;
- } exception;
+ /* Exceptions to be injected to the guest. */
+ struct kvm_queued_exception exception;
struct kvm_queued_interrupt {
bool injected;
diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index 83bae1f2eeb8..471d40e97890 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -462,7 +462,7 @@ static void nested_save_pending_event_to_vmcb12(struct vcpu_svm *svm,
unsigned int nr;
if (vcpu->arch.exception.injected) {
- nr = vcpu->arch.exception.nr;
+ nr = vcpu->arch.exception.vector;
exit_int_info = nr | SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_EXEPT;
if (vcpu->arch.exception.has_error_code) {
@@ -1299,42 +1299,43 @@ int nested_svm_check_permissions(struct kvm_vcpu *vcpu)
static bool nested_exit_on_exception(struct vcpu_svm *svm)
{
- unsigned int nr = svm->vcpu.arch.exception.nr;
+ unsigned int vector = svm->vcpu.arch.exception.vector;
- return (svm->nested.ctl.intercepts[INTERCEPT_EXCEPTION] & BIT(nr));
+ return (svm->nested.ctl.intercepts[INTERCEPT_EXCEPTION] & BIT(vector));
}
-static void nested_svm_inject_exception_vmexit(struct vcpu_svm *svm)
+static void nested_svm_inject_exception_vmexit(struct kvm_vcpu *vcpu)
{
- unsigned int nr = svm->vcpu.arch.exception.nr;
+ struct kvm_queued_exception *ex = &vcpu->arch.exception;
+ struct vcpu_svm *svm = to_svm(vcpu);
struct vmcb *vmcb = svm->vmcb;
- vmcb->control.exit_code = SVM_EXIT_EXCP_BASE + nr;
+ vmcb->control.exit_code = SVM_EXIT_EXCP_BASE + ex->vector;
vmcb->control.exit_code_hi = 0;
- if (svm->vcpu.arch.exception.has_error_code)
- vmcb->control.exit_info_1 = svm->vcpu.arch.exception.error_code;
+ if (ex->has_error_code)
+ vmcb->control.exit_info_1 = ex->error_code;
/*
* EXITINFO2 is undefined for all exception intercepts other
* than #PF.
*/
- if (nr == PF_VECTOR) {
- if (svm->vcpu.arch.exception.nested_apf)
- vmcb->control.exit_info_2 = svm->vcpu.arch.apf.nested_apf_token;
- else if (svm->vcpu.arch.exception.has_payload)
- vmcb->control.exit_info_2 = svm->vcpu.arch.exception.payload;
+ if (ex->vector == PF_VECTOR) {
+ if (ex->has_payload)
+ vmcb->control.exit_info_2 = ex->payload;
else
- vmcb->control.exit_info_2 = svm->vcpu.arch.cr2;
- } else if (nr == DB_VECTOR) {
+ vmcb->control.exit_info_2 = vcpu->arch.cr2;
+ } else if (ex->vector == DB_VECTOR) {
/* See inject_pending_event. */
- kvm_deliver_exception_payload(&svm->vcpu);
- if (svm->vcpu.arch.dr7 & DR7_GD) {
- svm->vcpu.arch.dr7 &= ~DR7_GD;
- kvm_update_dr7(&svm->vcpu);
+ kvm_deliver_exception_payload(vcpu, ex);
+
+ if (vcpu->arch.dr7 & DR7_GD) {
+ vcpu->arch.dr7 &= ~DR7_GD;
+ kvm_update_dr7(vcpu);
}
- } else
- WARN_ON(svm->vcpu.arch.exception.has_payload);
+ } else {
+ WARN_ON(ex->has_payload);
+ }
nested_svm_vmexit(svm);
}
@@ -1372,7 +1373,7 @@ static int svm_check_nested_events(struct kvm_vcpu *vcpu)
return -EBUSY;
if (!nested_exit_on_exception(svm))
return 0;
- nested_svm_inject_exception_vmexit(svm);
+ nested_svm_inject_exception_vmexit(vcpu);
return 0;
}
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index ca39f76ca44b..6b80046a014f 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -432,22 +432,20 @@ static int svm_update_soft_interrupt_rip(struct kvm_vcpu *vcpu)
static void svm_inject_exception(struct kvm_vcpu *vcpu)
{
+ struct kvm_queued_exception *ex = &vcpu->arch.exception;
struct vcpu_svm *svm = to_svm(vcpu);
- unsigned nr = vcpu->arch.exception.nr;
- bool has_error_code = vcpu->arch.exception.has_error_code;
- u32 error_code = vcpu->arch.exception.error_code;
- kvm_deliver_exception_payload(vcpu);
+ kvm_deliver_exception_payload(vcpu, ex);
- if (kvm_exception_is_soft(nr) &&
+ if (kvm_exception_is_soft(ex->vector) &&
svm_update_soft_interrupt_rip(vcpu))
return;
- svm->vmcb->control.event_inj = nr
+ svm->vmcb->control.event_inj = ex->vector
| SVM_EVTINJ_VALID
- | (has_error_code ? SVM_EVTINJ_VALID_ERR : 0)
+ | (ex->has_error_code ? SVM_EVTINJ_VALID_ERR : 0)
| SVM_EVTINJ_TYPE_EXEPT;
- svm->vmcb->control.event_inj_err = error_code;
+ svm->vmcb->control.event_inj_err = ex->error_code;
}
static void svm_init_erratum_383(void)
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 7b644513c82b..fafdcbfeca1f 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -445,29 +445,27 @@ static bool nested_vmx_is_page_fault_vmexit(struct vmcs12 *vmcs12,
*/
static int nested_vmx_check_exception(struct kvm_vcpu *vcpu, unsigned long *exit_qual)
{
+ struct kvm_queued_exception *ex = &vcpu->arch.exception;
struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
- unsigned int nr = vcpu->arch.exception.nr;
- bool has_payload = vcpu->arch.exception.has_payload;
- unsigned long payload = vcpu->arch.exception.payload;
- if (nr == PF_VECTOR) {
- if (vcpu->arch.exception.nested_apf) {
+ if (ex->vector == PF_VECTOR) {
+ if (ex->nested_apf) {
*exit_qual = vcpu->arch.apf.nested_apf_token;
return 1;
}
- if (nested_vmx_is_page_fault_vmexit(vmcs12,
- vcpu->arch.exception.error_code)) {
- *exit_qual = has_payload ? payload : vcpu->arch.cr2;
+ if (nested_vmx_is_page_fault_vmexit(vmcs12, ex->error_code)) {
+ *exit_qual = ex->has_payload ? ex->payload : vcpu->arch.cr2;
return 1;
}
- } else if (vmcs12->exception_bitmap & (1u << nr)) {
- if (nr == DB_VECTOR) {
- if (!has_payload) {
- payload = vcpu->arch.dr6;
- payload &= ~DR6_BT;
- payload ^= DR6_ACTIVE_LOW;
+ } else if (vmcs12->exception_bitmap & (1u << ex->vector)) {
+ if (ex->vector == DB_VECTOR) {
+ if (ex->has_payload) {
+ *exit_qual = ex->payload;
+ } else {
+ *exit_qual = vcpu->arch.dr6;
+ *exit_qual &= ~DR6_BT;
+ *exit_qual ^= DR6_ACTIVE_LOW;
}
- *exit_qual = payload;
} else
*exit_qual = 0;
return 1;
@@ -3724,7 +3722,7 @@ static void vmcs12_save_pending_event(struct kvm_vcpu *vcpu,
is_double_fault(exit_intr_info))) {
vmcs12->idt_vectoring_info_field = 0;
} else if (vcpu->arch.exception.injected) {
- nr = vcpu->arch.exception.nr;
+ nr = vcpu->arch.exception.vector;
idt_vectoring = nr | VECTORING_INFO_VALID_MASK;
if (kvm_exception_is_soft(nr)) {
@@ -3828,11 +3826,11 @@ static int vmx_complete_nested_posted_interrupt(struct kvm_vcpu *vcpu)
static void nested_vmx_inject_exception_vmexit(struct kvm_vcpu *vcpu,
unsigned long exit_qual)
{
+ struct kvm_queued_exception *ex = &vcpu->arch.exception;
+ u32 intr_info = ex->vector | INTR_INFO_VALID_MASK;
struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
- unsigned int nr = vcpu->arch.exception.nr;
- u32 intr_info = nr | INTR_INFO_VALID_MASK;
- if (vcpu->arch.exception.has_error_code) {
+ if (ex->has_error_code) {
/*
* Intel CPUs will never generate an error code with bits 31:16
* set, and more importantly VMX disallows setting bits 31:16
@@ -3840,11 +3838,11 @@ static void nested_vmx_inject_exception_vmexit(struct kvm_vcpu *vcpu,
* mimic hardware and avoid inducing failure on nested VM-Entry
* if L1 chooses to inject the exception back to L2.
*/
- vmcs12->vm_exit_intr_error_code = (u16)vcpu->arch.exception.error_code;
+ vmcs12->vm_exit_intr_error_code = (u16)ex->error_code;
intr_info |= INTR_INFO_DELIVER_CODE_MASK;
}
- if (kvm_exception_is_soft(nr))
+ if (kvm_exception_is_soft(ex->vector))
intr_info |= INTR_TYPE_SOFT_EXCEPTION;
else
intr_info |= INTR_TYPE_HARD_EXCEPTION;
@@ -3875,7 +3873,7 @@ static void nested_vmx_inject_exception_vmexit(struct kvm_vcpu *vcpu,
static inline unsigned long vmx_get_pending_dbg_trap(struct kvm_vcpu *vcpu)
{
if (!vcpu->arch.exception.pending ||
- vcpu->arch.exception.nr != DB_VECTOR)
+ vcpu->arch.exception.vector != DB_VECTOR)
return 0;
/* General Detect #DBs are always fault-like. */
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 26b863c78a9f..7ef5659a1bbd 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -1585,7 +1585,7 @@ static void vmx_update_emulated_instruction(struct kvm_vcpu *vcpu)
*/
if (nested_cpu_has_mtf(vmcs12) &&
(!vcpu->arch.exception.pending ||
- vcpu->arch.exception.nr == DB_VECTOR))
+ vcpu->arch.exception.vector == DB_VECTOR))
vmx->nested.mtf_pending = true;
else
vmx->nested.mtf_pending = false;
@@ -1612,15 +1612,13 @@ static void vmx_clear_hlt(struct kvm_vcpu *vcpu)
static void vmx_inject_exception(struct kvm_vcpu *vcpu)
{
+ struct kvm_queued_exception *ex = &vcpu->arch.exception;
+ u32 intr_info = ex->vector | INTR_INFO_VALID_MASK;
struct vcpu_vmx *vmx = to_vmx(vcpu);
- unsigned nr = vcpu->arch.exception.nr;
- bool has_error_code = vcpu->arch.exception.has_error_code;
- u32 error_code = vcpu->arch.exception.error_code;
- u32 intr_info = nr | INTR_INFO_VALID_MASK;
- kvm_deliver_exception_payload(vcpu);
+ kvm_deliver_exception_payload(vcpu, ex);
- if (has_error_code) {
+ if (ex->has_error_code) {
/*
* Despite the error code being architecturally defined as 32
* bits, and the VMCS field being 32 bits, Intel CPUs and thus
@@ -1630,21 +1628,21 @@ static void vmx_inject_exception(struct kvm_vcpu *vcpu)
* the upper bits to avoid VM-Fail, losing information that
* does't really exist is preferable to killing the VM.
*/
- vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, (u16)error_code);
+ vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, (u16)ex->error_code);
intr_info |= INTR_INFO_DELIVER_CODE_MASK;
}
if (vmx->rmode.vm86_active) {
int inc_eip = 0;
- if (kvm_exception_is_soft(nr))
+ if (kvm_exception_is_soft(ex->vector))
inc_eip = vcpu->arch.event_exit_inst_len;
- kvm_inject_realmode_interrupt(vcpu, nr, inc_eip);
+ kvm_inject_realmode_interrupt(vcpu, ex->vector, inc_eip);
return;
}
WARN_ON_ONCE(vmx->emulation_required);
- if (kvm_exception_is_soft(nr)) {
+ if (kvm_exception_is_soft(ex->vector)) {
vmcs_write32(VM_ENTRY_INSTRUCTION_LEN,
vmx->vcpu.arch.event_exit_inst_len);
intr_info |= INTR_TYPE_SOFT_EXCEPTION;
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index b63421d511c5..511c0c8af80e 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -557,16 +557,13 @@ static int exception_type(int vector)
return EXCPT_FAULT;
}
-void kvm_deliver_exception_payload(struct kvm_vcpu *vcpu)
+void kvm_deliver_exception_payload(struct kvm_vcpu *vcpu,
+ struct kvm_queued_exception *ex)
{
- unsigned nr = vcpu->arch.exception.nr;
- bool has_payload = vcpu->arch.exception.has_payload;
- unsigned long payload = vcpu->arch.exception.payload;
-
- if (!has_payload)
+ if (!ex->has_payload)
return;
- switch (nr) {
+ switch (ex->vector) {
case DB_VECTOR:
/*
* "Certain debug exceptions may clear bit 0-3. The
@@ -591,8 +588,8 @@ void kvm_deliver_exception_payload(struct kvm_vcpu *vcpu)
* So they need to be flipped for DR6.
*/
vcpu->arch.dr6 |= DR6_ACTIVE_LOW;
- vcpu->arch.dr6 |= payload;
- vcpu->arch.dr6 ^= payload & DR6_ACTIVE_LOW;
+ vcpu->arch.dr6 |= ex->payload;
+ vcpu->arch.dr6 ^= ex->payload & DR6_ACTIVE_LOW;
/*
* The #DB payload is defined as compatible with the 'pending
@@ -603,12 +600,12 @@ void kvm_deliver_exception_payload(struct kvm_vcpu *vcpu)
vcpu->arch.dr6 &= ~BIT(12);
break;
case PF_VECTOR:
- vcpu->arch.cr2 = payload;
+ vcpu->arch.cr2 = ex->payload;
break;
}
- vcpu->arch.exception.has_payload = false;
- vcpu->arch.exception.payload = 0;
+ ex->has_payload = false;
+ ex->payload = 0;
}
EXPORT_SYMBOL_GPL(kvm_deliver_exception_payload);
@@ -647,17 +644,18 @@ static void kvm_multiple_exception(struct kvm_vcpu *vcpu,
vcpu->arch.exception.injected = false;
}
vcpu->arch.exception.has_error_code = has_error;
- vcpu->arch.exception.nr = nr;
+ vcpu->arch.exception.vector = nr;
vcpu->arch.exception.error_code = error_code;
vcpu->arch.exception.has_payload = has_payload;
vcpu->arch.exception.payload = payload;
if (!is_guest_mode(vcpu))
- kvm_deliver_exception_payload(vcpu);
+ kvm_deliver_exception_payload(vcpu,
+ &vcpu->arch.exception);
return;
}
/* to check exception */
- prev_nr = vcpu->arch.exception.nr;
+ prev_nr = vcpu->arch.exception.vector;
if (prev_nr == DF_VECTOR) {
/* triple fault -> shutdown */
kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
@@ -675,7 +673,7 @@ static void kvm_multiple_exception(struct kvm_vcpu *vcpu,
vcpu->arch.exception.pending = true;
vcpu->arch.exception.injected = false;
vcpu->arch.exception.has_error_code = true;
- vcpu->arch.exception.nr = DF_VECTOR;
+ vcpu->arch.exception.vector = DF_VECTOR;
vcpu->arch.exception.error_code = 0;
vcpu->arch.exception.has_payload = false;
vcpu->arch.exception.payload = 0;
@@ -4886,25 +4884,24 @@ static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu,
static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu,
struct kvm_vcpu_events *events)
{
+ struct kvm_queued_exception *ex = &vcpu->arch.exception;
+
process_nmi(vcpu);
if (kvm_check_request(KVM_REQ_SMI, vcpu))
process_smi(vcpu);
/*
- * In guest mode, payload delivery should be deferred,
- * so that the L1 hypervisor can intercept #PF before
- * CR2 is modified (or intercept #DB before DR6 is
- * modified under nVMX). Unless the per-VM capability,
- * KVM_CAP_EXCEPTION_PAYLOAD, is set, we may not defer the delivery of
- * an exception payload and handle after a KVM_GET_VCPU_EVENTS. Since we
- * opportunistically defer the exception payload, deliver it if the
- * capability hasn't been requested before processing a
- * KVM_GET_VCPU_EVENTS.
+ * In guest mode, payload delivery should be deferred if the exception
+ * will be intercepted by L1, e.g. KVM should not modifying CR2 if L1
+ * intercepts #PF, ditto for DR6 and #DBs. If the per-VM capability,
+ * KVM_CAP_EXCEPTION_PAYLOAD, is not set, userspace may or may not
+ * propagate the payload and so it cannot be safely deferred. Deliver
+ * the payload if the capability hasn't been requested.
*/
if (!vcpu->kvm->arch.exception_payload_enabled &&
- vcpu->arch.exception.pending && vcpu->arch.exception.has_payload)
- kvm_deliver_exception_payload(vcpu);
+ ex->pending && ex->has_payload)
+ kvm_deliver_exception_payload(vcpu, ex);
/*
* The API doesn't provide the instruction length for software
@@ -4912,26 +4909,25 @@ static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu,
* isn't advanced, we should expect to encounter the exception
* again.
*/
- if (kvm_exception_is_soft(vcpu->arch.exception.nr)) {
+ if (kvm_exception_is_soft(ex->vector)) {
events->exception.injected = 0;
events->exception.pending = 0;
} else {
- events->exception.injected = vcpu->arch.exception.injected;
- events->exception.pending = vcpu->arch.exception.pending;
+ events->exception.injected = ex->injected;
+ events->exception.pending = ex->pending;
/*
* For ABI compatibility, deliberately conflate
* pending and injected exceptions when
* KVM_CAP_EXCEPTION_PAYLOAD isn't enabled.
*/
if (!vcpu->kvm->arch.exception_payload_enabled)
- events->exception.injected |=
- vcpu->arch.exception.pending;
+ events->exception.injected |= ex->pending;
}
- events->exception.nr = vcpu->arch.exception.nr;
- events->exception.has_error_code = vcpu->arch.exception.has_error_code;
- events->exception.error_code = vcpu->arch.exception.error_code;
- events->exception_has_payload = vcpu->arch.exception.has_payload;
- events->exception_payload = vcpu->arch.exception.payload;
+ events->exception.nr = ex->vector;
+ events->exception.has_error_code = ex->has_error_code;
+ events->exception.error_code = ex->error_code;
+ events->exception_has_payload = ex->has_payload;
+ events->exception_payload = ex->payload;
events->interrupt.injected =
vcpu->arch.interrupt.injected && !vcpu->arch.interrupt.soft;
@@ -5003,7 +4999,7 @@ static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu,
process_nmi(vcpu);
vcpu->arch.exception.injected = events->exception.injected;
vcpu->arch.exception.pending = events->exception.pending;
- vcpu->arch.exception.nr = events->exception.nr;
+ vcpu->arch.exception.vector = events->exception.nr;
vcpu->arch.exception.has_error_code = events->exception.has_error_code;
vcpu->arch.exception.error_code = events->exception.error_code;
vcpu->arch.exception.has_payload = events->exception_has_payload;
@@ -9497,7 +9493,7 @@ int kvm_check_nested_events(struct kvm_vcpu *vcpu)
static void kvm_inject_exception(struct kvm_vcpu *vcpu)
{
- trace_kvm_inj_exception(vcpu->arch.exception.nr,
+ trace_kvm_inj_exception(vcpu->arch.exception.vector,
vcpu->arch.exception.has_error_code,
vcpu->arch.exception.error_code,
vcpu->arch.exception.injected);
@@ -9569,12 +9565,12 @@ static int inject_pending_event(struct kvm_vcpu *vcpu, bool *req_immediate_exit)
* describe the behavior of General Detect #DBs, which are
* fault-like. They do _not_ set RF, a la code breakpoints.
*/
- if (exception_type(vcpu->arch.exception.nr) == EXCPT_FAULT)
+ if (exception_type(vcpu->arch.exception.vector) == EXCPT_FAULT)
__kvm_set_rflags(vcpu, kvm_get_rflags(vcpu) |
X86_EFLAGS_RF);
- if (vcpu->arch.exception.nr == DB_VECTOR) {
- kvm_deliver_exception_payload(vcpu);
+ if (vcpu->arch.exception.vector == DB_VECTOR) {
+ kvm_deliver_exception_payload(vcpu, &vcpu->arch.exception);
if (vcpu->arch.dr7 & DR7_GD) {
vcpu->arch.dr7 &= ~DR7_GD;
kvm_update_dr7(vcpu);
diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h
index 501b884b8cc4..dc2af0146220 100644
--- a/arch/x86/kvm/x86.h
+++ b/arch/x86/kvm/x86.h
@@ -286,7 +286,8 @@ int kvm_write_guest_virt_system(struct kvm_vcpu *vcpu,
int handle_ud(struct kvm_vcpu *vcpu);
-void kvm_deliver_exception_payload(struct kvm_vcpu *vcpu);
+void kvm_deliver_exception_payload(struct kvm_vcpu *vcpu,
+ struct kvm_queued_exception *ex);
void kvm_vcpu_mtrr_init(struct kvm_vcpu *vcpu);
u8 kvm_mtrr_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn);
--
2.36.1.476.g0c4daa206d-goog
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