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Merge "Explicitly disable the SPME bit in MDCR_EL3" into integration

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Soby Mathew 2019-10-07 12:06:08 +00:00 • committed by TrustedFirmware Code Review
commit 80003d86a6
1 changed files with 8 additions and 1 deletions
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9
include/arch/aarch64/el3_common_macros.S
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@ -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