commit ef1b5d8366f760ba15a8520f1b99ad93755f12e9
author Sona Mathew <sonarebecca.mathew@arm.com> Wed Jul 10 18:04:40 2024 -0500
committer Sona Mathew <sonarebecca.mathew@arm.com> Thu Oct 03 10:07:47 2024 -0500
tree 25cedeffd3aff1598215b5ed3d80a2658dcc0a38
parent 9f97a075380c1c651d045ec03d30847bfe47523c

fix(cpus): modify the fix for Cortex-A75 erratum 764081

Apply the mitigation only for the revision and variant
mentioned in the SDEN.

SDEN Documentation:
https://developer.arm.com/documentation/SDEN859515/latest

Change-Id: Ifda1f4cb32bdec9a9af29397ddc03bf22a7a87fc
Signed-off-by: Sona Mathew <sonarebecca.mathew@arm.com>

include/lib/cpus/aarch64/cortex_a75.h

diff --git a/include/lib/cpus/aarch64/cortex_a75.h b/include/lib/cpus/aarch64/cortex_a75.h
index ca79991..7a97ed1 100644
--- a/include/lib/cpus/aarch64/cortex_a75.h
+++ b/include/lib/cpus/aarch64/cortex_a75.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019, Arm Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2024, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -50,6 +50,11 @@
 unsigned int cortex_a75_amu_read_cpuamcntenclr_el0(void);
 void cortex_a75_amu_write_cpuamcntenset_el0(unsigned int mask);
 void cortex_a75_amu_write_cpuamcntenclr_el0(unsigned int mask);
+
+#if ERRATA_A75_764081
+long check_erratum_cortex_a75_764081(long cpu_rev);
+#endif /* ERRATA_A75_764081 */
+
 #endif /* __ASSEMBLER__ */
 
 #endif /* CORTEX_A75_H */

include/lib/cpus/errata.h

diff --git a/include/lib/cpus/errata.h b/include/lib/cpus/errata.h
index ef1b02b..2c31515 100644
--- a/include/lib/cpus/errata.h
+++ b/include/lib/cpus/errata.h
@@ -35,6 +35,15 @@
 
 void print_errata_status(void);
 
+#if ERRATA_A75_764081
+bool errata_a75_764081_applies(void);
+#else
+static inline bool errata_a75_764081_applies(void)
+{
+       return false;
+}
+#endif
+
 #if ERRATA_A520_2938996 || ERRATA_X4_2726228
 unsigned int check_if_affected_core(void);
 #endif