Djam/arm-trusted-firmware
1
0
Fork 0
mirror of https://github.com/ARM-software/arm-trusted-firmware.git synced 2025-04-08 05:43:53 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

fix(cpus): workaround for Cortex-A715 erratum 2331818

Browse source 
Cortex-A715 erratum 2331818 is a cat B erratum that applies to
revisions r0p0 and r1p0 and is fixed in r1p1. The workaround is to
set bit[20] of CPUACTLR2_EL1. Setting this bit is expected to have
a negligible performance impact.

SDEN can be found here:
https://developer.arm.com/documentation/SDEN2148827/latest

Change-Id: If3b1ed78b145ab6515cdd41135314350ed556381
Signed-off-by: Bipin Ravi <biprav01@u203721.austin.arm.com>
This commit is contained in:
Bipin Ravi 2024-02-27 17:49:12 -06:00
parent 1f73247132
commit 53b3cd2532
3 changed files with 14 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
docs/design/cpu-specific-build-macros.rst
View file

@ -881,6 +881,10 @@ For Cortex-A520, the following errata build flags are defined :
For Cortex-A715, the following errata build flags are defined :
- ``ERRATA_A715_2331818``: This applies errata 2331818 workaround to
Cortex-A715 CPU. This needs to be enabled for revisions r0p0 and r1p0.
It is fixed in r1p1.
- ``ERRATA_A715_2420947``: This applies errata 2420947 workaround to
Cortex-A715 CPU. This needs to be enabled only for revision r1p0.
It is fixed in r1p1.

6
lib/cpus/aarch64/cortex_a715.S
View file

@ -26,6 +26,12 @@
wa_cve_2022_23960_bhb_vector_table CORTEX_A715_BHB_LOOP_COUNT, cortex_a715
#endif /* WORKAROUND_CVE_2022_23960 */
workaround_reset_start cortex_a715, ERRATUM(2331818), ERRATA_A715_2331818
sysreg_bit_set CORTEX_A715_CPUACTLR2_EL1, BIT(20)
workaround_reset_end cortex_a715, ERRATUM(2331818)
check_erratum_ls cortex_a715, ERRATUM(2331818), CPU_REV(1, 0)
workaround_reset_start cortex_a715, ERRATUM(2420947), ERRATA_A715_2420947
sysreg_bit_set CORTEX_A715_CPUACTLR2_EL1, BIT(33)
workaround_reset_end cortex_a715, ERRATUM(2420947)

4
lib/cpus/cpu-ops.mk
View file

@ -911,6 +911,10 @@ CPU_FLAG_LIST += ERRATA_V2_2779510
# This erratum applies to revisions r0p0, r0p1. Fixed in r0p2.
CPU_FLAG_LIST += ERRATA_V2_2801372
# Flag to apply erratum 2331818 workaround during reset. This erratum applies
# to revisions r0p0 and r1p0. It is fixed in r1p1.
CPU_FLAG_LIST += ERRATA_A715_2331818
# Flag to apply erratum 2420947 workaround during reset. This erratum applies
# only to revision r1p0. It is fixed in r1p1.
CPU_FLAG_LIST += ERRATA_A715_2420947