4.17-stable review patch. If anyone has any objections, please let me know.
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From: "Shuah Khan (Samsung OSG)" shuah@kernel.org
[ Upstream commit ab0e9c4b91ca902b1cae593b3dec9c4c7a724f9f ]
When kvm test is skipped because of unmet dependencies and/or unsupported configuration, it exits with error which is treated as a fail by the Kselftest framework. This leads to false negative result even when the test could not be run.
Change it to return kselftest skip code when a test gets skipped to clearly report that the test could not be run.
Change it to use ksft_exit_skip() when the test is skipped. In addition, refine test_assert() message to include strerror() string and add explicit check for EACCES to cleary identify when test doesn't run when access is denied to resources required e.g: open /dev/kvm failed, rc: -1 errno: 13
Signed-off-by: Shuah Khan (Samsung OSG) shuah@kernel.org Acked-by: Paolo Bonzini pbonzini@redhat.com Signed-off-by: Shuah Khan (Samsung OSG) shuah@kernel.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- tools/testing/selftests/kvm/lib/assert.c | 9 +++++++-- tools/testing/selftests/kvm/vmx_tsc_adjust_test.c | 2 ++ 2 files changed, 9 insertions(+), 2 deletions(-)
--- a/tools/testing/selftests/kvm/lib/assert.c +++ b/tools/testing/selftests/kvm/lib/assert.c @@ -13,6 +13,8 @@ #include <execinfo.h> #include <sys/syscall.h>
+#include "../../kselftest.h" + /* Dumps the current stack trace to stderr. */ static void __attribute__((noinline)) test_dump_stack(void); static void test_dump_stack(void) @@ -70,8 +72,9 @@ test_assert(bool exp, const char *exp_st
fprintf(stderr, "==== Test Assertion Failure ====\n" " %s:%u: %s\n" - " pid=%d tid=%d\n", - file, line, exp_str, getpid(), gettid()); + " pid=%d tid=%d - %s\n", + file, line, exp_str, getpid(), gettid(), + strerror(errno)); test_dump_stack(); if (fmt) { fputs(" ", stderr); @@ -80,6 +83,8 @@ test_assert(bool exp, const char *exp_st } va_end(ap);
+ if (errno == EACCES) + ksft_exit_skip("Access denied - Exiting.\n"); exit(254); }
--- a/tools/testing/selftests/kvm/vmx_tsc_adjust_test.c +++ b/tools/testing/selftests/kvm/vmx_tsc_adjust_test.c @@ -28,6 +28,8 @@ #include <string.h> #include <sys/ioctl.h>
+#include "../kselftest.h" + #ifndef MSR_IA32_TSC_ADJUST #define MSR_IA32_TSC_ADJUST 0x3b #endif