[PATCH] KVM: selftests: Use GUEST_ASSERT_EQ() to check exit codes in Hyper-V SVM test

From: Sean Christopherson

Date: Fri Nov 14 2025 - 11:40:04 EST


Use GUEST_ASSERT_EQ() instead of GUEST_ASSERT(x == SVM_EXIT_<code>) in the
Hyper-V SVM test so that the test prints the actual vs. expected values on
failure. E.g. instead of printing:

vmcb->control.exit_code == SVM_EXIT_VMMCALL

print:

0x7c != 0x81 (vmcb->control.exit_code != SVM_EXIT_VMMCALL)

Cc: Yosry Ahmed <yosry.ahmed@xxxxxxxxx>
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
---
.../testing/selftests/kvm/x86/hyperv_svm_test.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/tools/testing/selftests/kvm/x86/hyperv_svm_test.c b/tools/testing/selftests/kvm/x86/hyperv_svm_test.c
index 0ddb63229bcb..7fb988df5f55 100644
--- a/tools/testing/selftests/kvm/x86/hyperv_svm_test.c
+++ b/tools/testing/selftests/kvm/x86/hyperv_svm_test.c
@@ -94,7 +94,7 @@ static void __attribute__((__flatten__)) guest_code(struct svm_test_data *svm,

GUEST_SYNC(2);
run_guest(vmcb, svm->vmcb_gpa);
- GUEST_ASSERT(vmcb->control.exit_code == SVM_EXIT_VMMCALL);
+ GUEST_ASSERT_EQ(vmcb->control.exit_code, SVM_EXIT_VMMCALL);
GUEST_SYNC(4);
vmcb->save.rip += 3;

@@ -102,13 +102,13 @@ static void __attribute__((__flatten__)) guest_code(struct svm_test_data *svm,
vmcb->control.intercept |= 1ULL << INTERCEPT_MSR_PROT;
__set_bit(2 * (MSR_FS_BASE & 0x1fff), svm->msr + 0x800);
run_guest(vmcb, svm->vmcb_gpa);
- GUEST_ASSERT(vmcb->control.exit_code == SVM_EXIT_MSR);
+ GUEST_ASSERT_EQ(vmcb->control.exit_code, SVM_EXIT_MSR);
vmcb->save.rip += 2; /* rdmsr */

/* Enable enlightened MSR bitmap */
hve->hv_enlightenments_control.msr_bitmap = 1;
run_guest(vmcb, svm->vmcb_gpa);
- GUEST_ASSERT(vmcb->control.exit_code == SVM_EXIT_MSR);
+ GUEST_ASSERT_EQ(vmcb->control.exit_code, SVM_EXIT_MSR);
vmcb->save.rip += 2; /* rdmsr */

/* Intercept RDMSR 0xc0000101 without telling KVM about it */
@@ -117,13 +117,13 @@ static void __attribute__((__flatten__)) guest_code(struct svm_test_data *svm,
vmcb->control.clean |= HV_VMCB_NESTED_ENLIGHTENMENTS;
run_guest(vmcb, svm->vmcb_gpa);
/* Make sure we don't see SVM_EXIT_MSR here so eMSR bitmap works */
- GUEST_ASSERT(vmcb->control.exit_code == SVM_EXIT_VMMCALL);
+ GUEST_ASSERT_EQ(vmcb->control.exit_code, SVM_EXIT_VMMCALL);
vmcb->save.rip += 3; /* vmcall */

/* Now tell KVM we've changed MSR-Bitmap */
vmcb->control.clean &= ~HV_VMCB_NESTED_ENLIGHTENMENTS;
run_guest(vmcb, svm->vmcb_gpa);
- GUEST_ASSERT(vmcb->control.exit_code == SVM_EXIT_MSR);
+ GUEST_ASSERT_EQ(vmcb->control.exit_code, SVM_EXIT_MSR);
vmcb->save.rip += 2; /* rdmsr */


@@ -132,16 +132,16 @@ static void __attribute__((__flatten__)) guest_code(struct svm_test_data *svm,
* no VMCALL exit expected.
*/
run_guest(vmcb, svm->vmcb_gpa);
- GUEST_ASSERT(vmcb->control.exit_code == SVM_EXIT_MSR);
+ GUEST_ASSERT_EQ(vmcb->control.exit_code, SVM_EXIT_MSR);
vmcb->save.rip += 2; /* rdmsr */
/* Enable synthetic vmexit */
*(u32 *)(hv_pages->partition_assist) = 1;
run_guest(vmcb, svm->vmcb_gpa);
- GUEST_ASSERT(vmcb->control.exit_code == HV_SVM_EXITCODE_ENL);
+ GUEST_ASSERT_EQ(vmcb->control.exit_code, HV_SVM_EXITCODE_ENL);
GUEST_ASSERT(vmcb->control.exit_info_1 == HV_SVM_ENL_EXITCODE_TRAP_AFTER_FLUSH);

run_guest(vmcb, svm->vmcb_gpa);
- GUEST_ASSERT(vmcb->control.exit_code == SVM_EXIT_VMMCALL);
+ GUEST_ASSERT_EQ(vmcb->control.exit_code, SVM_EXIT_VMMCALL);
GUEST_SYNC(6);

GUEST_DONE();

base-commit: 16ec4fb4ac95d878b879192d280db2baeec43272
--
2.52.0.rc1.455.g30608eb744-goog