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| author | Jaswinder Singh Rajput <jaswinder@kernel.org> | 2009-06-11 15:28:09 +0530 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-06-13 12:58:25 +0200 |
| commit | 4d2be1267fcfb3a4d2198fd696aec5e3dcbce60e (patch) | |
| tree | 18d01f008ed0ae174539be7a69253a8b93a8384e /arch | |
| parent | d5e8da6449d4ef4bac35ea9b9719a2cda02e7b39 (diff) | |
| download | blackbird-op-linux-4d2be1267fcfb3a4d2198fd696aec5e3dcbce60e.tar.gz blackbird-op-linux-4d2be1267fcfb3a4d2198fd696aec5e3dcbce60e.zip | |
perf_counter, x86: Check old-AMD performance monitoring support
AMD supports performance monitoring start from K7 (i.e. family 6),
so disable it for earlier AMD CPUs.
Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1244714289.6923.0.camel@ht.satnam>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/cpu/perf_counter.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c index 275bc142cd5d..3c37c3930ca1 100644 --- a/arch/x86/kernel/cpu/perf_counter.c +++ b/arch/x86/kernel/cpu/perf_counter.c @@ -1459,6 +1459,10 @@ static int intel_pmu_init(void) static int amd_pmu_init(void) { + /* Performance-monitoring supported from K7 and later: */ + if (boot_cpu_data.x86 < 6) + return -ENODEV; + x86_pmu = amd_pmu; switch (boot_cpu_data.x86) { |
