[PATCH] ARM: mvebu: fix Cortex-A9 errata selection for Armada 38x

[Qingfang Deng <qingfang.deng@linux.dev>]

Armada 38x uses Cortex-A9 r4p1, but MACH_ARMADA_38X selects the
workaround for erratum 720789, which was fixed in r2p0, and omits
workarounds for errata that still affect r4p1.

Drop ARM_ERRATA_720789 and select ARM_ERRATA_754322 for faulty MMU
translations following an ASID switch and ARM_ERRATA_764319 for
unexpected undefined instruction exceptions when reading debug
registers. Also select ARM_ERRATA_764369 when SMP is enabled to work
around cache maintenance by MVA failing to reach other agents.

The Cortex-A9 r4 Software Developers Errata Notice (ARM UAN 0009D)
lists these errata in sections 2.3.3, 2.5.10 and 2.3.4, respectively.

Link: https://documentation-service.arm.com/static/608118675e70d934bc69f143
Fixes: 9aa30f1c13d1 ("ARM: mvebu: add initial support for the Armada 380/385 SOCs")
Signed-off-by: Qingfang Deng <qingfang.deng@linux.dev>
---
 arch/arm/mach-mvebu/Kconfig | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig
index 9f60a6fe0eaf..5203b5cfa457 100644
--- a/arch/arm/mach-mvebu/Kconfig
+++ b/arch/arm/mach-mvebu/Kconfig
@@ -55,7 +55,9 @@ config MACH_ARMADA_375
 config MACH_ARMADA_38X
 	bool "Marvell Armada 380/385 boards"
 	depends on ARCH_MULTI_V7
-	select ARM_ERRATA_720789
+	select ARM_ERRATA_754322
+	select ARM_ERRATA_764319
+	select ARM_ERRATA_764369 if SMP
 	select PL310_ERRATA_753970
 	select ARM_GIC
 	select ARM_GLOBAL_TIMER
-- 
2.43.0