Djam/arm-trusted-firmware
1
0
Fork 0
mirror of https://github.com/ARM-software/arm-trusted-firmware.git synced 2025-04-15 17:14:21 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

fix(cpus): workaround for Cortex-A715 erratum 2420947

Browse source 
Cortex-A715 erratum 2420947 is a cat B erratum that applies only
to revision r1p0 and is fixed in r1p1. The workaround is to set
bit[33] of CPUACTLR2_EL1. This will prevent store and store-release
to merge inside the write buffer, and it is not expected to have
much performance impacts.

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

Change-Id: I01a71b878cd958e742ff8357f8cdfbfc5625de47
Signed-off-by: Bipin Ravi <biprav01@u203721.austin.arm.com>
This commit is contained in:
Bipin Ravi 2024-02-27 17:34:05 -06:00
parent 4a8357fb4b
commit 1f73247132
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_2420947``: This applies errata 2420947 workaround to
Cortex-A715 CPU. This needs to be enabled only for revision r1p0.
It is fixed in r1p1.
- ``ERRATA_A715_2429384``: This applies errata 2429384 workaround to
Cortex-A715 CPU. This needs to be enabled for revision r1p0. There is no
workaround for revision r0p0. 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(2420947), ERRATA_A715_2420947
sysreg_bit_set CORTEX_A715_CPUACTLR2_EL1, BIT(33)
workaround_reset_end cortex_a715, ERRATUM(2420947)
check_erratum_range cortex_a715, ERRATUM(2420947), CPU_REV(1, 0), CPU_REV(1, 0)
workaround_reset_start cortex_a715, ERRATUM(2429384), ERRATA_A715_2429384
sysreg_bit_set CORTEX_A715_CPUACTLR2_EL1, BIT(27)
workaround_reset_end cortex_a715, ERRATUM(2429384)

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 2420947 workaround during reset. This erratum applies
# only to revision r1p0. It is fixed in r1p1.
CPU_FLAG_LIST += ERRATA_A715_2420947
# Flag to apply erratum 2429384 workaround during reset. This erratum applies
# to revision r1p0. There is no workaround for r0p0. It is fixed in r1p1.
CPU_FLAG_LIST += ERRATA_A715_2429384