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| author | James Hogan <james.hogan@imgtec.com> | 2016-05-11 13:50:53 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2016-05-13 15:30:25 +0200 |
| commit | 30228c40f0c6f0a93910325f120904505a4c39cc (patch) | |
| tree | e94f33f75456f37efe79b1bcfb7b5359035dfbb1 /arch/mips/kernel/cpu-probe.c | |
| parent | f18bdfa191df3947879f93519ce4a4985e5f5fce (diff) | |
| download | linux-30228c40f0c6f0a93910325f120904505a4c39cc.tar.gz linux-30228c40f0c6f0a93910325f120904505a4c39cc.tar.bz2 linux-30228c40f0c6f0a93910325f120904505a4c39cc.zip | |
MIPS: Add perf counter feature
Add CPU feature for standard MIPS r2 performance counters, as determined
by the Config1.PC bit. Both perf_events and oprofile probe this bit, so
lets combine the probing and change both to use cpu_has_perf.
This will also be used for VZ support in KVM to know whether performance
counters exist which can be exposed to guests.
[ralf@linux-mips.org: resolve conflict.]
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Robert Richter <rric@kernel.org>
Cc: linux-mips@linux-mips.org
Cc: oprofile-list@lists.sf.net
Patchwork: https://patchwork.linux-mips.org/patch/13226/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/cpu-probe.c')
| -rw-r--r-- | arch/mips/kernel/cpu-probe.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c index 963ce7ef29df..45770d83c3f0 100644 --- a/arch/mips/kernel/cpu-probe.c +++ b/arch/mips/kernel/cpu-probe.c @@ -648,6 +648,8 @@ static inline unsigned int decode_config1(struct cpuinfo_mips *c) if (config1 & MIPS_CONF1_MD) c->ases |= MIPS_ASE_MDMX; + if (config1 & MIPS_CONF1_PC) + c->options |= MIPS_CPU_PERF; if (config1 & MIPS_CONF1_WR) c->options |= MIPS_CPU_WATCH; if (config1 & MIPS_CONF1_CA) |