1 files changed, 32 insertions, 1 deletions

diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index 9332cf7c0826..e107ed2d66dc 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -23,6 +23,8 @@
 #include <asm/cputype.h>
 #include <asm/cpufeature.h>
 
+#define MIDR_CORTEX_A53 MIDR_CPU_PART(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A53)
+
 /*
  * Add a struct or another datatype to the union below if you need
  * different means to detect an affected CPU.
@@ -39,8 +41,37 @@ struct arm64_cpu_capabilities {
         };
 };
 
+#define CPU_MODEL_MASK (MIDR_IMPLEMENTOR_MASK | MIDR_PARTNUM_MASK | \
+                        MIDR_ARCHITECTURE_MASK)
+
+static bool __maybe_unused
+is_affected_midr_range(struct arm64_cpu_capabilities *entry)
+{
+        u32 midr = read_cpuid_id();
+
+        if ((midr & CPU_MODEL_MASK) != entry->midr_model)
+                return false;
+
+        midr &= MIDR_REVISION_MASK | MIDR_VARIANT_MASK;
+
+        return (midr >= entry->midr_range_min && midr <= entry->midr_range_max);
+}
+
+#define MIDR_RANGE(model, min, max) \
+        .is_affected = is_affected_midr_range, \
+        .midr_model = model, \
+        .midr_range_min = min, \
+        .midr_range_max = max
+
 struct arm64_cpu_capabilities arm64_errata[] = {
-        {}
+        {
+        /* Cortex-A53 r0p[012] */
+                .desc = "ARM errata 826319, 827319, 824069",
+                .capability = ARM64_WORKAROUND_CLEAN_CACHE,
+                MIDR_RANGE(MIDR_CORTEX_A53, 0x00, 0x02),
+        },
+        {
+        }
 };
 
 void check_local_cpu_errata(void)