perf/x86/uncore: Correct the number of CHAs on SPR

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commit 38776cc45e upstream.

The number of CHAs from the discovery table on some SPR variants is
incorrect, because of a firmware issue. An accurate number can be read
from the MSR UNC_CBO_CONFIG.

Fixes: 949b11381f ("perf/x86/intel/uncore: Add Sapphire Rapids server CHA support")
Reported-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Stephane Eranian <eranian@google.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20230508140206.283708-1-kan.liang@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Kan Liang 2023-05-08 07:02:06 -07:00 • committed by Greg Kroah-Hartman

parent f3078be2fe

commit ed0ef89508

1 changed files with 11 additions and 0 deletions

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arch/x86/events/intel/uncore_snbep.c

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