commit 189622a111bb235eacd4c3284a9898d71d0f2c2b
author Arvind Ram Prakash <arvind.ramprakash@arm.com> Mon Jul 17 14:46:14 2023 -0500
committer Arvind Ram Prakash <arvind.ramprakash@arm.com> Thu Aug 03 22:42:31 2023 +0200
tree 0611f0b5ea930213fc44a4fd84d4c071ec2b39cf
parent eb49113e497b6dc260ba099440eac2e7ab6e8533

fix(cpus): workaround for Neoverse N2 erratum 2779511

Neoverse N2 erratum 2779511 is a Cat B erratum that applies to
all revisions <=r0p2 and is fixed in r0p3. The workaround is to
set bit[47] of CPUACTLR3_EL1

SDEN documentation:
https://developer.arm.com/documentation/SDEN1982442/latest

Signed-off-by: Arvind Ram Prakash <arvind.ramprakash@arm.com>
Change-Id: Iaa0e30de8473ecb1df1fcca3a45904aac2e419b3

lib/cpus/aarch64/neoverse_n2.S

diff --git a/lib/cpus/aarch64/neoverse_n2.S b/lib/cpus/aarch64/neoverse_n2.S
index e981ef7..acf8dee 100644
--- a/lib/cpus/aarch64/neoverse_n2.S
+++ b/lib/cpus/aarch64/neoverse_n2.S
@@ -181,6 +181,13 @@
 
 check_erratum_ls neoverse_n2, ERRATUM(2743089), CPU_REV(0, 2)
 
+workaround_reset_start neoverse_n2, ERRATUM(2779511), ERRATA_N2_2779511
+	/* Set bit 47 in ACTLR3_EL1 */
+	sysreg_bit_set NEOVERSE_N2_CPUACTLR3_EL1, NEOVERSE_N2_CPUACTLR3_EL1_BIT_47
+workaround_reset_end neoverse_n2, ERRATUM(2779511)
+
+check_erratum_ls neoverse_n2, ERRATUM(2779511), CPU_REV(0, 2)
+
 workaround_reset_start neoverse_n2, CVE(2022,23960), WORKAROUND_CVE_2022_23960
 #if IMAGE_BL31
 	/*