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From: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
To: mpe@ellerman.id.au
Cc: linuxppc-dev@lists.ozlabs.org,
	Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Subject: [PATCH] powerpc/perf: use MSR to report privilege level on P9 DD1
Date: Tue,  3 Jan 2017 14:43:13 +0530	[thread overview]
Message-ID: <1483434793-1814-1-git-send-email-maddy@linux.vnet.ibm.com> (raw)

"use_siar" variable is primarily used for deciding the sampled address
and the privilege level to be reported for a sample. perf_read_regs()
function updates the "use_siar" and "regs->result" based on the pmu
flags along with other checks. To force the use of MSR to report the
privilege level and to use "regs->nip" to report the instruction pointer,
set "PPMU_NO_CONT_SAMPLING" flag and remove "PPMU_HAS_SIER" from the
ppmu->flags.

Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
---
 arch/powerpc/perf/power9-pmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/perf/power9-pmu.c b/arch/powerpc/perf/power9-pmu.c
index a46ef29e50e7..06b7e8ebd29a 100644
--- a/arch/powerpc/perf/power9-pmu.c
+++ b/arch/powerpc/perf/power9-pmu.c
@@ -403,7 +403,7 @@ static struct power_pmu power9_isa207_pmu = {
 	.bhrb_filter_map	= power9_bhrb_filter_map,
 	.get_constraint		= isa207_get_constraint,
 	.disable_pmc		= isa207_disable_pmc,
-	.flags			= PPMU_HAS_SIER | PPMU_ARCH_207S,
+	.flags			= PPMU_NO_CONT_SAMPLING | PPMU_ARCH_207S,
 	.n_generic		= ARRAY_SIZE(power9_generic_events),
 	.generic_events		= power9_generic_events,
 	.cache_events		= &power9_cache_events,
-- 
2.7.4

             reply	other threads:[~2017-01-03  9:14 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-01-03  9:13 Madhavan Srinivasan [this message]
2017-01-17  5:46 ` [PATCH] powerpc/perf: use MSR to report privilege level on P9 DD1 Michael Ellerman
2017-01-17  6:18   ` Madhavan Srinivasan

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