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| author | Athira Rajeev <atrajeev@linux.vnet.ibm.com> | 2020-11-26 19:54:39 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-12-30 13:53:32 +0300 |
| commit | e559aaba71b9d1eebe8e3ac8627b641686dc04d8 (patch) | |
| tree | 51e2685adc25d022e92ae44940aec54db8b0e3c5 /arch | |
| parent | 0760233fd45070542fbc4f1b1156296fcde096bb (diff) | |
| download | linux-e559aaba71b9d1eebe8e3ac8627b641686dc04d8.tar.xz | |
powerpc/perf: Update the PMU group constraints for l2l3 events in power10
[ Upstream commit e924be7b0b0d1f37d0509c854a92c7a71e3cdfe7 ]
In Power9, L2/L3 bus events are always available as a
"bank" of 4 events. To obtain the counts for any of the
l2/l3 bus events in a given bank, the user will have to
program PMC4 with corresponding l2/l3 bus event for that
bank.
Commit 59029136d750 ("powerpc/perf: Add constraints for power9 l2/l3 bus events")
enforced this rule in Power9. But this is not valid for
Power10, since in Power10 Monitor Mode Control Register2
(MMCR2) has bits to configure l2/l3 event bits. Hence remove
this PMC4 constraint check from power10.
Since the l2/l3 bits in MMCR2 are not per-pmc, patch handles
group constrints checks for l2/l3 bits in MMCR2.
Fixes: a64e697cef23 ("powerpc/perf: power10 Performance Monitoring support")
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1606409684-1589-3-git-send-email-atrajeev@linux.vnet.ibm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/perf/isa207-common.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/powerpc/perf/isa207-common.c b/arch/powerpc/perf/isa207-common.c index f57f54f92c10..38ed450c7855 100644 --- a/arch/powerpc/perf/isa207-common.c +++ b/arch/powerpc/perf/isa207-common.c @@ -311,9 +311,11 @@ int isa207_get_constraint(u64 event, unsigned long *maskp, unsigned long *valp) } if (unit >= 6 && unit <= 9) { - if (cpu_has_feature(CPU_FTR_ARCH_31) && (unit == 6)) { - mask |= CNST_L2L3_GROUP_MASK; - value |= CNST_L2L3_GROUP_VAL(event >> p10_L2L3_EVENT_SHIFT); + if (cpu_has_feature(CPU_FTR_ARCH_31)) { + if (unit == 6) { + mask |= CNST_L2L3_GROUP_MASK; + value |= CNST_L2L3_GROUP_VAL(event >> p10_L2L3_EVENT_SHIFT); + } } else if (cpu_has_feature(CPU_FTR_ARCH_300)) { mask |= CNST_CACHE_GROUP_MASK; value |= CNST_CACHE_GROUP_VAL(event & 0xff); |