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MIPS: perf: More robustly probe for the presence of per-tc counters

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The presence of per TC performance counters is now detected by
cpu-probe.c and indicated by MIPS_CPU_MT_PER_TC_PERF_COUNTERS in
cpu_data. Switch detection of the feature to use this new flag rather
than blindly testing the implementation specific config7 register with a
magic number.

Signed-off-by: Matt Redfearn <matt.redfearn@mips.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Maciej W. Rozycki <macro@mips.com>
Cc: Paul Burton <paul.burton@mips.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: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
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/19142/
Signed-off-by: James Hogan <jhogan@kernel.org>
This commit is contained in:
Matt Redfearn
2018-04-20 11:23:04 +01:00
committed by James Hogan
parent 8270ab48e6
commit 800fb71281
3 changed files with 7 additions and 5 deletions
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7
arch/mips/include/asm/cpu-features.h
View File

@@ -535,6 +535,13 @@
# define cpu_has_shared_ftlb_entries 0
#endif
#ifdef CONFIG_MIPS_MT_SMP
# define cpu_has_mipsmt_pertccounters \
(cpu_data[0].options & MIPS_CPU_MT_PER_TC_PERF_COUNTERS)
#else
# define cpu_has_mipsmt_pertccounters 0
#endif /* CONFIG_MIPS_MT_SMP */
/*
* Guest capabilities
*/