[PATCH v1 6/6] arm64: cpufeature: Enable BBML3 on Cortex-A320, A520 and A720

[Ryan Roberts <ryan.roberts@arm.com>]

Cortex-A320, Cortex-A520 and Cortex-A720 advertise BBML2 and are known
not to raise conflict aborts for mapping-granularity changes. They can
therefore use the BBML3 semantics, but their MIDRs are missing from the
allow list.

Commit a7ac60414475 ("arm64: cpufeature: Extend bbml2_noabort support
list") named A520(AE) and A720(AE), but added only the AE MIDRs. The
non-AE CPUs have distinct MIDRs and need their own entries. Cortex-A320
can now be identified using its new MIDR definition.

Add all revisions of these three CPUs to the allow list. The reviewed
SDENs identify no BBML3 exclusion erratum for them.

Cortex-A510 remains excluded because it can raise conflict aborts.

Link: https://support.arm.com/documentation/SDEN-2877630/0000?lang=en&rev=0000-06
Link: https://support.arm.com/documentation/SDEN-2444153/0000?lang=en&rev=0000-12
Link: https://support.arm.com/documentation/SDEN-2439421/0000?lang=en&rev=0000-17
Signed-off-by: Ryan Roberts <ryan.roberts@arm.com>
---
 arch/arm64/kernel/cpufeature.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index aa6f4c8c1052..de2d2bd686d8 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -2015,11 +2015,14 @@ bool cpu_supports_bbml3(void)
 		MIDR_ALL_VERSIONS(MIDR_NVIDIA_RIGEL),
 		MIDR_ALL_VERSIONS(MIDR_AMPERE1),
 		MIDR_ALL_VERSIONS(MIDR_AMPERE1A),
+		MIDR_ALL_VERSIONS(MIDR_CORTEX_A320),
+		MIDR_ALL_VERSIONS(MIDR_CORTEX_A520),
 		MIDR_ALL_VERSIONS(MIDR_CORTEX_A520AE),
 #ifndef CONFIG_ARM64_ERRATUM_3696244
 		MIDR_ALL_VERSIONS(MIDR_CORTEX_A710),
 #endif
 		MIDR_ALL_VERSIONS(MIDR_CORTEX_A715),
+		MIDR_ALL_VERSIONS(MIDR_CORTEX_A720),
 		MIDR_ALL_VERSIONS(MIDR_CORTEX_A720AE),
 		MIDR_ALL_VERSIONS(MIDR_CORTEX_A725),
 #ifndef CONFIG_ARM64_ERRATUM_3696244
-- 
2.43.0