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| author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-02-02 23:22:20 -0300 |
|---|---|---|
| committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-02-02 23:22:20 -0300 |
| commit | 5c545e1fb127a4b11ddc5f1a5ed066b853dd1a1a (patch) | |
| tree | d4cd913bc79d37d32756a9bffbeedabf93e32579 /arch/arm64/mm/proc-macros.S | |
| parent | b4b7ff4b08e691656c9d77c758fc355833128ac0 (diff) | |
Linux-libre 4.4.1-gnupck-4.4.1-gnu
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 4c4d93c4b..d69dffffa 100644 --- a/arch/arm64/mm/proc-macros.S +++ b/arch/arm64/mm/proc-macros.S @@ -62,3 +62,15 @@ bfi \valreg, \tmpreg, #TCR_T0SZ_OFFSET, #TCR_TxSZ_WIDTH #endif .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 |