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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-12 13:16:52 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-12 13:16:52 -0700 |
| commit | 4ddbac98980fe0a42cf57af5d1032e024aced6a1 (patch) | |
| tree | 341d152dc1f9427d70d5b1fadafca61d22baacbb /arch/x86 | |
| parent | 02a99ed6207e9a1d787bb360ef97de023c7edf4a (diff) | |
| parent | 018df72dd01576ab199c6129233cdeaf1409958b (diff) | |
| download | linux-4ddbac98980fe0a42cf57af5d1032e024aced6a1.tar.bz2 | |
Merge branch 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
perf_counter: Start documenting HAVE_PERF_COUNTERS requirements
perf_counter: Add forward/backward attribute ABI compatibility
perf record: Explicity program a default counter
perf_counter: Remove PERF_TYPE_RAW special casing
perf_counter: PERF_TYPE_HW_CACHE is a hardware counter too
powerpc, perf_counter: Fix performance counter event types
perf_counter/x86: Add a quirk for Atom processors
perf_counter tools: Remove one L1-data alias
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/cpu/perf_counter.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c index 895c82e78455..275bc142cd5d 100644 --- a/arch/x86/kernel/cpu/perf_counter.c +++ b/arch/x86/kernel/cpu/perf_counter.c @@ -968,6 +968,13 @@ fixed_mode_idx(struct perf_counter *counter, struct hw_perf_counter *hwc) if (!x86_pmu.num_counters_fixed) return -1; + /* + * Quirk, IA32_FIXED_CTRs do not work on current Atom processors: + */ + if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL && + boot_cpu_data.x86_model == 28) + return -1; + event = hwc->config & ARCH_PERFMON_EVENT_MASK; if (unlikely(event == x86_pmu.event_map(PERF_COUNT_HW_INSTRUCTIONS))) |