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authorAndi Kleen <ak@linux.intel.com>2014-11-03 17:00:28 -0800
committerIngo Molnar <mingo@kernel.org>2014-11-16 09:53:36 +0100
commit68055915c1c22489f9658bd2b7391bb11b2cf4e4 (patch)
treed1fc12606a313d76851d468b09eb1cede3a0c0d9 /arch/arm/mach-s3c24xx/mach-smdk2443.c
parent41a134a5830a5e1396723ace0a63000780d6e267 (diff)
perf/x86/intel/uncore: Fix boot crash on SBOX PMU on Haswell-EP
There were several reports that on some systems writing the SBOX0 PMU initialization MSR would #GP at boot. This did not happen on all systems -- my two test systems booted fine. Writing the three initialization bits bit-by-bit seems to avoid the problem. So add a special callback to do just that. This replaces an earlier patch that disabled the SBOX. Reported-by: Alexei Starovoitov <alexei.starovoitov@gmail.com> Reported-and-Tested-by: Patrick Lu <patrick.lu@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Link: http://lkml.kernel.org/r/1415062828-19759-4-git-send-email-andi@firstfloor.org [ Fixed a whitespace error and added attribution tags that were left out inexplicably. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/arm/mach-s3c24xx/mach-smdk2443.c')
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