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| author | Ingo Molnar <mingo@kernel.org> | 2016-02-18 09:28:03 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-02-18 09:28:03 +0100 |
| commit | 3a2f2ac9b96f9a9f5538396a212d3b9fb543bfc5 (patch) | |
| tree | 294c2f340b11584e58cea90adfc4182ac8742348 /arch/arm64/mm/proc-macros.S | |
| parent | 4e79e182b419172e35936a47f098509092d69817 (diff) | |
| parent | f4eafd8bcd5229e998aa252627703b8462c3b90f (diff) | |
Merge branch 'x86/urgent' into x86/asm, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/arm64/mm/proc-macros.S')
| -rw-r--r-- | arch/arm64/mm/proc-macros.S | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm64/mm/proc-macros.S b/arch/arm64/mm/proc-macros.S index 146bd99a7532..e6a30e1268a8 100644 --- a/arch/arm64/mm/proc-macros.S +++ b/arch/arm64/mm/proc-macros.S @@ -84,3 +84,15 @@ b.lo 9998b dsb \domain .endm + +/* + * reset_pmuserenr_el0 - reset PMUSERENR_EL0 if PMUv3 present + */ + .macro reset_pmuserenr_el0, tmpreg + mrs \tmpreg, id_aa64dfr0_el1 // Check ID_AA64DFR0_EL1 PMUVer + sbfx \tmpreg, \tmpreg, #8, #4 + cmp \tmpreg, #1 // Skip if no PMU present + b.lt 9000f + msr pmuserenr_el0, xzr // Disable PMU access from EL0 +9000: + .endm |