commit c54b3ef7253e82bc66a274476756bab3816e7fd3
author Sona Mathew <sonarebecca.mathew@arm.com> Tue Nov 07 13:46:15 2023 -0600
committer Sona Mathew <sonarebecca.mathew@arm.com> Mon Nov 20 16:29:40 2023 -0600
tree 54b31e979933b843348b096e71c546e0e2bd441e
parent 2eab9d0c79ef750a0b909557e3e970cc711d9269

fix(cpus): workaround for Neoverse V1 erratum 2348377

Neoverse V1 erratum 2348377 is a Cat B erratum that applies to
all revisions <= r1p1 and is fixed in r1p2. The workaround is to
set CPUACTLR5_EL1[61] to 1.

SDEN documentation:
https://developer.arm.com/documentation/SDEN-1401781/latest

Change-Id: Ica402494f78811c85e56a262e1f60b09915168fe
Signed-off-by: Sona Mathew <sonarebecca.mathew@arm.com>

lib/cpus/aarch64/neoverse_v1.S

diff --git a/lib/cpus/aarch64/neoverse_v1.S b/lib/cpus/aarch64/neoverse_v1.S
index 2a49134..c2fbb11 100644
--- a/lib/cpus/aarch64/neoverse_v1.S
+++ b/lib/cpus/aarch64/neoverse_v1.S
@@ -196,6 +196,13 @@
 
 check_erratum_ls neoverse_v1, ERRATUM(2294912), CPU_REV(1, 2)
 
+workaround_runtime_start neoverse_v1, ERRATUM(2348377), ERRATA_V1_2348377
+	/* Set bit 61 in CPUACTLR5_EL1 */
+	sysreg_bit_set NEOVERSE_V1_ACTLR5_EL1, NEOVERSE_V1_ACTLR5_EL1_BIT_61
+workaround_runtime_end neoverse_v1, ERRATUM(2348377)
+
+check_erratum_ls neoverse_v1, ERRATUM(2348377), CPU_REV(1, 1)
+
 workaround_reset_start neoverse_v1, ERRATUM(2372203), ERRATA_V1_2372203
 	/* Set bit 40 in ACTLR2_EL1 */
 	sysreg_bit_set NEOVERSE_V1_ACTLR2_EL1, NEOVERSE_V1_ACTLR2_EL1_BIT_40