[PATCH 5.5 37/80] perf/x86/amd: Add missing L2 misses event spec to AMD Family 17hs event map
From: Greg Kroah-Hartman
Date: Tue Feb 18 2020 - 15:04:34 EST
From: Kim Phillips <kim.phillips@xxxxxxx>
commit 25d387287cf0330abf2aad761ce6eee67326a355 upstream.
Commit 3fe3331bb285 ("perf/x86/amd: Add event map for AMD Family 17h"),
claimed L2 misses were unsupported, due to them not being found in its
referenced documentation, whose link has now moved .
That old documentation listed PMCx064 unit mask bit 3 as:
"LsRdBlkC: LS Read Block C S L X Change to X Miss."
and bit 0 as:
"IcFillMiss: IC Fill Miss"
We now have new public documentation  with improved descriptions, that
clearly indicate what events those unit mask bits represent:
Bit 3 now clearly states:
"LsRdBlkC: Data Cache Req Miss in L2 (all types)"
and bit 0 is:
"IcFillMiss: Instruction Cache Req Miss in L2."
So we can now add support for L2 misses in perf's genericised events as
PMCx064 with both the above unit masks.
 The commit's original documentation reference, "Processor Programming
Reference (PPR) for AMD Family 17h Model 01h, Revision B1 Processors",
originally available here:
is now available here:
 "Processor Programming Reference (PPR) for Family 17h Model 31h,
Revision B0 Processors", available here:
Fixes: 3fe3331bb285 ("perf/x86/amd: Add event map for AMD Family 17h")
Reported-by: Babu Moger <babu.moger@xxxxxxx>
Signed-off-by: Kim Phillips <kim.phillips@xxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Tested-by: Babu Moger <babu.moger@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
arch/x86/events/amd/core.c | 1 +
1 file changed, 1 insertion(+)
@@ -246,6 +246,7 @@ static const u64 amd_f17h_perfmon_event_
[PERF_COUNT_HW_CPU_CYCLES] = 0x0076,
[PERF_COUNT_HW_INSTRUCTIONS] = 0x00c0,
[PERF_COUNT_HW_CACHE_REFERENCES] = 0xff60,
+ [PERF_COUNT_HW_CACHE_MISSES] = 0x0964,
[PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x00c2,
[PERF_COUNT_HW_BRANCH_MISSES] = 0x00c3,
[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = 0x0287,