fix(cpus): workaround for Cortex-A715 erratum 2429384
Cortex-A715 erratum 2429384 is a cat B erratum that applies to
revision r1p0 and is fixed in r1p1. The workaround is to set
bit[27] of CPUACTLR2_EL1. There is no workaround for revision
r0p0.
SDEN can be found here:
https://developer.arm.com/documentation/SDEN2148827/latest
Change-Id: I3cdb1b71567542174759f6946e9c81f77d0d993d
Signed-off-by: Bipin Ravi <biprav01@u203721.austin.arm.com>
diff --git a/lib/cpus/aarch64/cortex_a715.S b/lib/cpus/aarch64/cortex_a715.S
index 0faa276..44796b6 100644
--- a/lib/cpus/aarch64/cortex_a715.S
+++ b/lib/cpus/aarch64/cortex_a715.S
@@ -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(2429384), ERRATA_A715_2429384
+ sysreg_bit_set CORTEX_A715_CPUACTLR2_EL1, BIT(27)
+workaround_reset_end cortex_a715, ERRATUM(2429384)
+
+check_erratum_range cortex_a715, ERRATUM(2429384), CPU_REV(1, 0), CPU_REV(1, 0)
+
workaround_runtime_start cortex_a715, ERRATUM(2561034), ERRATA_A715_2561034
sysreg_bit_set CORTEX_A715_CPUACTLR2_EL1, BIT(26)
workaround_runtime_end cortex_a715, ERRATUM(2561034), NO_ISB
diff --git a/lib/cpus/cpu-ops.mk b/lib/cpus/cpu-ops.mk
index 0b4ed6b..22ca07d 100644
--- a/lib/cpus/cpu-ops.mk
+++ b/lib/cpus/cpu-ops.mk
@@ -907,6 +907,10 @@
# This erratum applies to revisions r0p0, r0p1. Fixed in r0p2.
CPU_FLAG_LIST += ERRATA_V2_2801372
+# 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
+
# Flag to apply erratum 2561034 workaround during reset. This erratum applies
# only to revision r1p0. It is fixed in r1p1.
CPU_FLAG_LIST += ERRATA_A715_2561034