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Commit fe8e7f83 authored by Gleb Natapov's avatar Gleb Natapov Committed by Avi Kivity
Browse files

KVM: SVM: Don't reinject event that caused a task switch 



If a task switch caused by an event remove it from the event queue.
VMX already does that.

Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent b586eb02

arch/x86/kvm/svm.c

+21 −2
Original line number Diff line number Diff line
@@ -1811,6 +1811,10 @@ static int task_switch_interception(struct vcpu_svm *svm, 
	int int_type = svm->vmcb->control.exit_int_info &

		SVM_EXITINTINFO_TYPE_MASK;

	int int_vec = svm->vmcb->control.exit_int_info & SVM_EVTINJ_VEC_MASK;

	uint32_t type =

		svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_TYPE_MASK;

	uint32_t idt_v =

		svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_VALID;



	tss_selector = (u16)svm->vmcb->control.exit_info_1;
@@ -1820,11 +1824,26 @@ static int task_switch_interception(struct vcpu_svm *svm, 
	else if (svm->vmcb->control.exit_info_2 &

		 (1ULL << SVM_EXITINFOSHIFT_TS_REASON_JMP))

		reason = TASK_SWITCH_JMP;

	else if (svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_VALID)

	else if (idt_v)

		reason = TASK_SWITCH_GATE;

	else

		reason = TASK_SWITCH_CALL;



	if (reason == TASK_SWITCH_GATE) {

		switch (type) {

		case SVM_EXITINTINFO_TYPE_NMI:

			svm->vcpu.arch.nmi_injected = false;

			break;

		case SVM_EXITINTINFO_TYPE_EXEPT:

			kvm_clear_exception_queue(&svm->vcpu);

			break;

		case SVM_EXITINTINFO_TYPE_INTR:

			kvm_clear_interrupt_queue(&svm->vcpu);

			break;

		default:

			break;

		}

	}



	if (reason != TASK_SWITCH_GATE ||

	    int_type == SVM_EXITINTINFO_TYPE_SOFT ||
@@ -2203,7 +2222,7 @@ static int handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) 


	if (is_external_interrupt(svm->vmcb->control.exit_int_info) &&

	    exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR &&

	    exit_code != SVM_EXIT_NPF)

	    exit_code != SVM_EXIT_NPF && exit_code != SVM_EXIT_TASK_SWITCH)

		printk(KERN_ERR "%s: unexpected exit_ini_info 0x%x "

		       "exit_code 0x%x\n",

		       __func__, svm->vmcb->control.exit_int_info,