fix(cpus): workaround for Cortex-A715 erratum 2413290
Cortex-A715 erratum 2413290 is a Cat B erratum that is present
only in revision r1p0 and is fixed in r1p1. The errata is only
present when SPE(Statistical Profiling Extension) is enabled.
The workaround is to set bits[58:57] of the CPUACTLR_EL1 to 'b11
when SPE is enabled, ENABLE_SPE_FOR_NS=1.
SDEN documentation:
https://developer.arm.com/documentation/SDEN2148827/latest
Change-Id: Iaeb258c8b0a92e93d70b7dad6ba59d1056aeb135
Signed-off-by: Sona Mathew <sonarebecca.mathew@arm.com>
diff --git a/lib/cpus/aarch64/cortex_a715.S b/lib/cpus/aarch64/cortex_a715.S
index 9e4d78e..6974e5f 100644
--- a/lib/cpus/aarch64/cortex_a715.S
+++ b/lib/cpus/aarch64/cortex_a715.S
@@ -60,6 +60,19 @@
check_erratum_ls cortex_a715, ERRATUM(2344187), CPU_REV(1, 0)
+/* Errata applies only when Static profiling extension is enabled. */
+workaround_reset_start cortex_a715, ERRATUM(2413290), ERRATA_A715_2413290
+ /* Apply the workaround by setting CPUACTLR_EL1[58:57] = 0b11. */
+ mrs x1, id_aa64dfr0_el1
+ ubfx x0, x1, ID_AA64DFR0_PMS_SHIFT, #4
+ cbz x0, 1f
+ sysreg_bit_set CORTEX_A715_CPUACTLR_EL1, BIT(57)
+ sysreg_bit_set CORTEX_A715_CPUACTLR_EL1, BIT(58)
+1:
+workaround_reset_end cortex_a715, ERRATUM(2413290)
+
+check_erratum_range cortex_a715, ERRATUM(2413290), CPU_REV(1,0), CPU_REV(1, 0)
+
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)