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| author | Saurabh Sengar <ssengar@linux.microsoft.com> | 2023-09-20 07:04:35 +0300 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2023-09-22 21:40:53 +0300 |
| commit | f2a55d08d7e1a5746dad80fc5eda023eff2eeea5 (patch) | |
| tree | 1accc73c8ee6d950c7e9a6370112c8cc5e3cf8bb /tools/perf/scripts/python/stackcollapse.py | |
| parent | ce9ecca0238b140b88f43859b211c9fdfd8e5b70 (diff) | |
| download | linux-f2a55d08d7e1a5746dad80fc5eda023eff2eeea5.tar.xz | |
x86/hyperv: Restrict get_vtl to only VTL platforms
When Linux runs in a non-default VTL (CONFIG_HYPERV_VTL_MODE=y),
get_vtl() must never fail as its return value is used in negotiations
with the host. In the more generic case, (CONFIG_HYPERV_VTL_MODE=n) the
VTL is always zero so there's no need to do the hypercall.
Make get_vtl() BUG() in case of failure and put the implementation under
"if IS_ENABLED(CONFIG_HYPERV_VTL_MODE)" to avoid the call altogether in
the most generic use case.
Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Link: https://lore.kernel.org/r/1695182675-13405-1-git-send-email-ssengar@linux.microsoft.com
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions