From: Nicușor Cîțu <nicu.citu@xxxxxxxxxx>
This function is needed for the KVMI_VCPU_INJECT_EXCEPTION command.
Signed-off-by: Nicușor Cîțu <nicu.citu@xxxxxxxxxx>
Signed-off-by: Adalbert Lazăr <alazar@xxxxxxxxxxxxxxx>
---
arch/x86/include/asm/kvm_host.h | 1 +
arch/x86/kvm/x86.c | 52 +++++++++++++++++++--------------
2 files changed, 31 insertions(+), 22 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 3a06a7799571..7dc1ebac8d91 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1514,6 +1514,7 @@ unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu);
void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags);
bool kvm_rdpmc(struct kvm_vcpu *vcpu);
+bool kvm_inject_pending_exception(struct kvm_vcpu *vcpu);
void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
void kvm_queue_exception_p(struct kvm_vcpu *vcpu, unsigned nr, unsigned long payload);
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 8eda5c3bd244..741505f405b1 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8200,6 +8200,35 @@ static void update_cr8_intercept(struct kvm_vcpu *vcpu)
kvm_x86_ops.update_cr8_intercept(vcpu, tpr, max_irr);
}
+bool kvm_inject_pending_exception(struct kvm_vcpu *vcpu)
+{
+ if (vcpu->arch.exception.pending) {
+ trace_kvm_inj_exception(vcpu->arch.exception.nr,
+ vcpu->arch.exception.has_error_code,
+ vcpu->arch.exception.error_code);
+
+ vcpu->arch.exception.pending = false;
+ vcpu->arch.exception.injected = true;
+
+ if (exception_type(vcpu->arch.exception.nr) == 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.dr7 & DR7_GD) {
+ vcpu->arch.dr7 &= ~DR7_GD;
+ kvm_update_dr7(vcpu);
+ }
+ }
+
+ kvm_x86_ops.queue_exception(vcpu);
+ return true;
+ }
+
+ return false;
+}
+
static void inject_pending_event(struct kvm_vcpu *vcpu, bool *req_immediate_exit)
{
int r;
@@ -8251,29 +8280,8 @@ static void inject_pending_event(struct kvm_vcpu *vcpu, bool *req_immediate_exit
}
/* try to inject new event if pending */
- if (vcpu->arch.exception.pending) {
- trace_kvm_inj_exception(vcpu->arch.exception.nr,
- vcpu->arch.exception.has_error_code,
- vcpu->arch.exception.error_code);
-
- vcpu->arch.exception.pending = false;
- vcpu->arch.exception.injected = true;
-
- if (exception_type(vcpu->arch.exception.nr) == 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.dr7 & DR7_GD) {
- vcpu->arch.dr7 &= ~DR7_GD;
- kvm_update_dr7(vcpu);
- }
- }
-
- kvm_x86_ops.queue_exception(vcpu);
+ if (kvm_inject_pending_exception(vcpu))
can_inject = false;
- }
/*
* Finally, inject interrupt events. If an event cannot be injected
