[PATCH] selftests: KVM: Gracefully handle missing vCPU features

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



An error of ENOENT for the KVM_ARM_VCPU_INIT ioctl indicates that one of
the requested feature flags is not supported by the kernel/hardware.
Detect the case when KVM doesn't support the requested features and skip
the test rather than failing it.

Cc: Andrew Jones <drjones@xxxxxxxxxx>
Signed-off-by: Oliver Upton <oupton@xxxxxxxxxx>
---
Applies to 5.14-rc6. Tested by running all selftests on an Ampere Mt.
Jade system.

 .../testing/selftests/kvm/lib/aarch64/processor.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/kvm/lib/aarch64/processor.c b/tools/testing/selftests/kvm/lib/aarch64/processor.c
index 632b74d6b3ca..b1064a0c5e62 100644
--- a/tools/testing/selftests/kvm/lib/aarch64/processor.c
+++ b/tools/testing/selftests/kvm/lib/aarch64/processor.c
@@ -216,6 +216,7 @@ void aarch64_vcpu_setup(struct kvm_vm *vm, int vcpuid, struct kvm_vcpu_init *ini
 {
 	struct kvm_vcpu_init default_init = { .target = -1, };
 	uint64_t sctlr_el1, tcr_el1;
+	int ret;
 
 	if (!init)
 		init = &default_init;
@@ -226,7 +227,19 @@ void aarch64_vcpu_setup(struct kvm_vm *vm, int vcpuid, struct kvm_vcpu_init *ini
 		init->target = preferred.target;
 	}
 
-	vcpu_ioctl(vm, vcpuid, KVM_ARM_VCPU_INIT, init);
+	ret = _vcpu_ioctl(vm, vcpuid, KVM_ARM_VCPU_INIT, init);
+
+	/*
+	 * Missing kernel feature support should result in skipping the test,
+	 * not failing it.
+	 */
+	if (ret && errno == ENOENT) {
+		print_skip("requested vCPU features not supported; skipping test.");
+		exit(KSFT_SKIP);
+	}
+
+	TEST_ASSERT(!ret, "KVM_ARM_VCPU_INIT failed, rc: %i errno: %i (%s)",
+		    ret, errno, strerror(errno));
 
 	/*
 	 * Enable FP/ASIMD to avoid trapping when accessing Q0-Q15
-- 
2.33.0.rc1.237.g0d66db33f3-goog

_______________________________________________
kvmarm mailing list
kvmarm@xxxxxxxxxxxxxxxxxxxxx
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm



[Index of Archives]     [Linux KVM]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux