diff options
| author | Calvin Owens <calvin@wbinvd.org> | 2025-06-13 19:20:28 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-08-20 18:41:31 +0200 |
| commit | 54d959676df65ca7b6b5833ab99d6fa792216ee8 (patch) | |
| tree | 68796efb57d0c455d1defd307afe0f0b70a584d6 | |
| parent | c723289f4e7f13968e97ecebd861d84bb9a390f0 (diff) | |
tools/power turbostat: Handle cap_get_proc() ENOSYS
[ Upstream commit d34fe509f5f76d9dc36291242d67c6528027ebbd ]
Kernels configured with CONFIG_MULTIUSER=n have no cap_get_proc().
Check for ENOSYS to recognize this case, and continue on to
attempt to access the requested MSRs (such as temperature).
Signed-off-by: Calvin Owens <calvin@wbinvd.org>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | tools/power/x86/turbostat/turbostat.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c index 9eb8e8a850ec..5c747131f155 100644 --- a/tools/power/x86/turbostat/turbostat.c +++ b/tools/power/x86/turbostat/turbostat.c @@ -6573,8 +6573,16 @@ int check_for_cap_sys_rawio(void) int ret = 0; caps = cap_get_proc(); - if (caps == NULL) + if (caps == NULL) { + /* + * CONFIG_MULTIUSER=n kernels have no cap_get_proc() + * Allow them to continue and attempt to access MSRs + */ + if (errno == ENOSYS) + return 0; + return 1; + } if (cap_get_flag(caps, CAP_SYS_RAWIO, CAP_EFFECTIVE, &cap_flag_value)) { ret = 1; |