perf/x86/intel/uncore: Register the PMU only if the uncore pci device exists

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Current code registers PMUs for all possible uncore pci devices.
This is not good because, on some machines, one or more uncore pci
devices can be missing. The missing pci device make corresponding
PMU unusable. Register the PMU only if the uncore device exists.

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: eranian@google.com
Link: http://lkml.kernel.org/r/1409872109-31645-3-git-send-email-andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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Yan, Zheng 2014-09-04 16:08:27 -07:00 • committed by Ingo Molnar

parent e735b9db12

commit 513d793e5f

1 changed files with 11 additions and 8 deletions

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arch/x86/kernel/cpu/perf_event_intel_uncore.c

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