diff options
Diffstat (limited to 'include/arch/aarch64/el3_common_macros.S')
| -rw-r--r-- | include/arch/aarch64/el3_common_macros.S | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/arch/aarch64/el3_common_macros.S b/include/arch/aarch64/el3_common_macros.S index ee20d5b2..378e827c 100644 --- a/include/arch/aarch64/el3_common_macros.S +++ b/include/arch/aarch64/el3_common_macros.S @@ -113,11 +113,18 @@ * prohibited in Secure state. This bit is RES0 in versions of the * architecture earlier than ARMv8.5, setting it to 1 doesn't have any * effect on them. + * + * MDCR_EL3.SPME: Set to zero so that event counting by the programmable + * counters PMEVCNTR<n>_EL0 is prohibited in Secure state. If ARMv8.2 + * Debug is not implemented this bit does not have any effect on the + * counters unless there is support for the implementation defined + * authentication interface ExternalSecureNoninvasiveDebugEnabled(). * --------------------------------------------------------------------- */ mov_imm x0, ((MDCR_EL3_RESET_VAL | MDCR_SDD_BIT | \ MDCR_SPD32(MDCR_SPD32_DISABLE) | MDCR_SCCD_BIT) & \ - ~(MDCR_TDOSA_BIT | MDCR_TDA_BIT | MDCR_TPM_BIT)) + ~(MDCR_SPME_BIT | MDCR_TDOSA_BIT | MDCR_TDA_BIT | \ + MDCR_TPM_BIT)) msr mdcr_el3, x0 |