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

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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: Jim Mattson <jmattson@google.com>
Link: https://lore.kernel.org/r/20250224165442.2338294-3-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2025-02-24 08:54:42 -08:00
parent be45bc4eff
commit f3513a335e
1 changed files with 2 additions and 0 deletions
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2
tools/testing/selftests/kvm/x86/nested_exceptions_test.c
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@ -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)