linux-kernel - [PATCH v2 03/10] KVM: selftests: print a message when skipping KVM tests

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Date:   Wed, 19 May 2021 13:03:32 -0700
From:   Axel Rasmussen <axelrasmussen@...gle.com>
To:     Aaron Lewis <aaronlewis@...gle.com>,
        Alexander Graf <graf@...zon.com>,
        Andrew Jones <drjones@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Ben Gardon <bgardon@...gle.com>,
        Emanuele Giuseppe Esposito <eesposit@...hat.com>,
        Eric Auger <eric.auger@...hat.com>,
        Jacob Xu <jacobhxu@...gle.com>,
        Makarand Sonare <makarandsonare@...gle.com>,
        Oliver Upton <oupton@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Peter Xu <peterx@...hat.com>, Shuah Khan <shuah@...nel.org>,
        Yanan Wang <wangyanan55@...wei.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org,
        Axel Rasmussen <axelrasmussen@...gle.com>
Subject: [PATCH v2 03/10] KVM: selftests: print a message when skipping KVM tests

Previously, if this check failed, we'd just exit quietly with no output.
This can be confusing, so print out a short message indicating why the
test is being skipped.

Signed-off-by: Axel Rasmussen <axelrasmussen@...gle.com>
---
 tools/testing/selftests/kvm/lib/kvm_util.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index f05ca919cccb..0d6ddee429b9 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -53,8 +53,10 @@ int kvm_check_cap(long cap)
 	int kvm_fd;
 
 	kvm_fd = open(KVM_DEV_PATH, O_RDONLY);
-	if (kvm_fd < 0)
+	if (kvm_fd < 0) {
+		print_skip("KVM not available, errno: %d", errno);
 		exit(KSFT_SKIP);
+	}
 
 	ret = ioctl(kvm_fd, KVM_CHECK_EXTENSION, cap);
 	TEST_ASSERT(ret != -1, "KVM_CHECK_EXTENSION IOCTL failed,\n"
-- 
2.31.1.751.gd2f1c929bd-goog