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| author | Michael Ellerman | 2014-03-14 06:00:29 +0100 |
|---|---|---|
| committer | Benjamin Herrenschmidt | 2014-03-23 23:48:25 +0100 |
| commit | c2e37a2626a7471875f3a6452b99dfd3809972b9 (patch) | |
| tree | 60c994235d65095308288c8ee3543b1e027d2c92 /arch/powerpc/include/asm | |
| parent | powerpc: Add a cpu feature CPU_FTR_PMAO_BUG (diff) | |
| download | kernel-qcow2-linux-c2e37a2626a7471875f3a6452b99dfd3809972b9.tar.gz kernel-qcow2-linux-c2e37a2626a7471875f3a6452b99dfd3809972b9.tar.xz kernel-qcow2-linux-c2e37a2626a7471875f3a6452b99dfd3809972b9.zip | |
powerpc/perf: Add lost exception workaround
Some power8 revisions have a hardware bug where we can lose a PMU
exception, this commit adds a workaround to detect the bad condition and
rectify the situation.
See the comment in the commit for a full description.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include/asm')
| -rw-r--r-- | arch/powerpc/include/asm/reg.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h index 90c06ec6eff5..30034720589a 100644 --- a/arch/powerpc/include/asm/reg.h +++ b/arch/powerpc/include/asm/reg.h @@ -670,6 +670,7 @@ #define MMCR0_PMC1CE 0x00008000UL /* PMC1 count enable*/ #define MMCR0_PMCjCE 0x00004000UL /* PMCj count enable*/ #define MMCR0_TRIGGER 0x00002000UL /* TRIGGER enable */ +#define MMCR0_PMAO_SYNC 0x00000800UL /* PMU interrupt is synchronous */ #define MMCR0_PMAO 0x00000080UL /* performance monitor alert has occurred, set to 0 after handling exception */ #define MMCR0_SHRFC 0x00000040UL /* SHRre freeze conditions between threads */ #define MMCR0_FC56 0x00000010UL /* freeze counters 5 and 6 */ @@ -703,6 +704,7 @@ #define SPRN_EBBHR 804 /* Event based branch handler register */ #define SPRN_EBBRR 805 /* Event based branch return register */ #define SPRN_BESCR 806 /* Branch event status and control register */ +#define BESCR_GE 0x8000000000000000ULL /* Global Enable */ #define SPRN_WORT 895 /* Workload optimization register - thread */ #define SPRN_PMC1 787 |