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| author |   JP Kobryn <inwardvessel@gmail.com> | 2025-06-27 10:49:35 -0700 |
|---|---|---|
| committer |   Borislav Petkov (AMD) <bp@alien8.de> | 2025-06-28 12:45:48 +0200 |
| commit | 30ad231a5029bfa16e46ce868497b1a5cdd3c24d (patch) | |
| tree | 1a5a9c2d1cefc2123ed9ae7c4eff85081580ba1e /tools/perf/scripts/python/Perf-Trace-Util/lib | |
| parent | x86/mce/amd: Fix threshold limit reset (diff) | |
| download | wireguard-linux-30ad231a5029bfa16e46ce868497b1a5cdd3c24d.tar.xz wireguard-linux-30ad231a5029bfa16e46ce868497b1a5cdd3c24d.zip | |
x86/mce: Make sure CMCI banks are cleared during shutdown on Intel
CMCI banks are not cleared during shutdown on Intel CPUs. As a side effect,
when a kexec is performed, CPUs coming back online are unable to
rediscover/claim these occupied banks which breaks MCE reporting.
Clear the CPU ownership during shutdown via cmci_clear() so the banks can
be reclaimed and MCE reporting will become functional once more.
[ bp: Massage commit message. ]
Reported-by: Aijay Adams <aijay@meta.com>
Signed-off-by: JP Kobryn <inwardvessel@gmail.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Reviewed-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Cc: <stable@kernel.org>
Link: https://lore.kernel.org/20250627174935.95194-1-inwardvessel@gmail.com
Diffstat (limited to 'tools/perf/scripts/python/Perf-Trace-Util/lib')
0 files changed, 0 insertions, 0 deletions