[PATCH v1] arm64: errata: pass REVIDR when matching target implementation CPUs
From: Khushit Shah
Date: Mon Aug 31 2026 - 06:59:22 EST
When target implementation CPUs are provided, is_affected_midr_range()
accidentally passed the MIDR as both arguments to __is_affected_midr_range(),
so the REVIDR mask check operated on the wrong register.
Pass REVIDR as intended.
Fixes: 86edf6bdcf05 ("smccc/kvm_guest: Enable errata based on implementation CPUs")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Khushit Shah <khushit.shah@xxxxxxxxxxx>
---
arch/arm64/kernel/cpu_errata.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index 5db8f0619e4b..b33dccfafaf8 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -82,7 +82,7 @@ is_affected_midr_range(const struct arm64_cpu_capabilities *entry, int scope)
for (i = 0; i < target_impl_cpu_num; i++) {
if (__is_affected_midr_range(entry, target_impl_cpus[i].midr,
- target_impl_cpus[i].midr))
+ target_impl_cpus[i].revidr))
return true;
}
return false;
--
2.39.3