[PATCH 1/2] arm64: Add Apple M3 and M4 CPU part numbers

Michael Reeves via B4 Relay devnull+michael.reeves077.gmail.com at kernel.org
Thu Oct 8 05:15:40 PDT 2026


From: Myria Sarvay <myrialsarvay at gmail.com>

Add CPU part numbers and MIDR definitions for M3, M3 Pro, M3 Max and
base M4 so CPU workarounds can identify these cores.

Separate M4 core codenames are not known, so use the SoC codename with
ECORE and PCORE suffixes.

Signed-off-by: Myria Sarvay <myrialsarvay at gmail.com>
Signed-off-by: Michael Reeves <michael.reeves077 at gmail.com>
---
 arch/arm64/include/asm/cputype.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h
index 1fa29616e..ca44c354c 100644
--- a/arch/arm64/include/asm/cputype.h
+++ b/arch/arm64/include/asm/cputype.h
@@ -155,6 +155,14 @@
 #define APPLE_CPU_PART_M2_AVALANCHE_PRO	0x035
 #define APPLE_CPU_PART_M2_BLIZZARD_MAX	0x038
 #define APPLE_CPU_PART_M2_AVALANCHE_MAX	0x039
+#define APPLE_CPU_PART_M3_SAWTOOTH	0x042
+#define APPLE_CPU_PART_M3_EVEREST	0x043
+#define APPLE_CPU_PART_M3_SAWTOOTH_PRO	0x044
+#define APPLE_CPU_PART_M3_EVEREST_PRO	0x045
+#define APPLE_CPU_PART_M3_SAWTOOTH_MAX	0x048
+#define APPLE_CPU_PART_M3_EVEREST_MAX	0x049
+#define APPLE_CPU_PART_M4_DONAN_ECORE	0x052
+#define APPLE_CPU_PART_M4_DONAN_PCORE	0x053
 
 #define AMPERE_CPU_PART_AMPERE1		0xAC3
 #define AMPERE_CPU_PART_AMPERE1A	0xAC4
@@ -250,6 +258,14 @@
 #define MIDR_APPLE_M2_AVALANCHE_PRO MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M2_AVALANCHE_PRO)
 #define MIDR_APPLE_M2_BLIZZARD_MAX MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M2_BLIZZARD_MAX)
 #define MIDR_APPLE_M2_AVALANCHE_MAX MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M2_AVALANCHE_MAX)
+#define MIDR_APPLE_M3_SAWTOOTH MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M3_SAWTOOTH)
+#define MIDR_APPLE_M3_EVEREST MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M3_EVEREST)
+#define MIDR_APPLE_M3_SAWTOOTH_PRO MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M3_SAWTOOTH_PRO)
+#define MIDR_APPLE_M3_EVEREST_PRO MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M3_EVEREST_PRO)
+#define MIDR_APPLE_M3_SAWTOOTH_MAX MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M3_SAWTOOTH_MAX)
+#define MIDR_APPLE_M3_EVEREST_MAX MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M3_EVEREST_MAX)
+#define MIDR_APPLE_M4_DONAN_ECORE MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M4_DONAN_ECORE)
+#define MIDR_APPLE_M4_DONAN_PCORE MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M4_DONAN_PCORE)
 #define MIDR_AMPERE1 MIDR_CPU_MODEL(ARM_CPU_IMP_AMPERE, AMPERE_CPU_PART_AMPERE1)
 #define MIDR_AMPERE1A MIDR_CPU_MODEL(ARM_CPU_IMP_AMPERE, AMPERE_CPU_PART_AMPERE1A)
 #define MIDR_MICROSOFT_AZURE_COBALT_100 MIDR_CPU_MODEL(ARM_CPU_IMP_MICROSOFT, MICROSOFT_CPU_PART_AZURE_COBALT_100)

-- 
2.56.0





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