Commit f3513a33 authored by Sean Christopherson's avatar Sean Christopherson
Browse files

KVM: selftests: Assert that STI blocking isn't set after event injection 



Add an L1 (guest) assert to the nested exceptions test to verify that KVM
doesn't put VMRUN in an STI shadow (AMD CPUs bleed the shadow into the
guest's int_state if a #VMEXIT occurs before VMRUN fully completes).

Add a similar assert to the VMX side as well, because why not.

Reviewed-by: default avatarJim Mattson <jmattson@google.com>
Link: https://lore.kernel.org/r/20250224165442.2338294-3-seanjc@google.com


Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
parent be45bc4e

tools/testing/selftests/kvm/x86/nested_exceptions_test.c

+2 −0
Original line number Diff line number Diff line
@@ -85,6 +85,7 @@ static void svm_run_l2(struct svm_test_data *svm, void *l2_code, int vector, 


	GUEST_ASSERT_EQ(ctrl->exit_code, (SVM_EXIT_EXCP_BASE + vector));

	GUEST_ASSERT_EQ(ctrl->exit_info_1, error_code);

	GUEST_ASSERT(!ctrl->int_state);

}



static void l1_svm_code(struct svm_test_data *svm)
@@ -122,6 +123,7 @@ static void vmx_run_l2(void *l2_code, int vector, uint32_t error_code) 
	GUEST_ASSERT_EQ(vmreadz(VM_EXIT_REASON), EXIT_REASON_EXCEPTION_NMI);

	GUEST_ASSERT_EQ((vmreadz(VM_EXIT_INTR_INFO) & 0xff), vector);

	GUEST_ASSERT_EQ(vmreadz(VM_EXIT_INTR_ERROR_CODE), error_code);

	GUEST_ASSERT(!vmreadz(GUEST_INTERRUPTIBILITY_INFO));

}



static void l1_vmx_code(struct vmx_pages *vmx)