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perf/x86/intel: Add more events requires FRONTEND MSR on Sapphire Rapids
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commit d18216f upstream.

On Sapphire Rapids, there are two more events 0x40ad and 0x04c2 which
rely on the FRONTEND MSR. If the FRONTEND MSR is not set correctly, the
count value is not correct.

Update intel_spr_extra_regs[] to support them.

Fixes: 61b985e ("perf/x86/intel: Add perf core PMU support for Sapphire Rapids")
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/1624029174-122219-3-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Kan Liang authored and gregkh committed Jul 14, 2021
1 parent d4222ec commit 6bf8ec1
Showing 1 changed file with 2 additions and 0 deletions.
2 changes: 2 additions & 0 deletions arch/x86/events/intel/core.c
Original file line number Diff line number Diff line change
Expand Up @@ -280,6 +280,8 @@ static struct extra_reg intel_spr_extra_regs[] __read_mostly = {
INTEL_UEVENT_EXTRA_REG(0x012b, MSR_OFFCORE_RSP_1, 0x3fffffffffull, RSP_1),
INTEL_UEVENT_PEBS_LDLAT_EXTRA_REG(0x01cd),
INTEL_UEVENT_EXTRA_REG(0x01c6, MSR_PEBS_FRONTEND, 0x7fff17, FE),
INTEL_UEVENT_EXTRA_REG(0x40ad, MSR_PEBS_FRONTEND, 0x7, FE),
INTEL_UEVENT_EXTRA_REG(0x04c2, MSR_PEBS_FRONTEND, 0x8, FE),
EVENT_EXTRA_END
};

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