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Apple M4 uarch detect #362

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Merged
GregoryComer merged 3 commits into from
Dec 30, 2025
Merged

Apple M4 uarch detect #362

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ea6959a
Apple M4 uarch detect
fbarchard Dec 30, 2025
e1fa7b0
clang-format applied
fbarchard Dec 30, 2025
40ee5e7
fix clang-format
fbarchard Dec 30, 2025
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5 changes: 5 additions & 0 deletions include/cpuinfo.h
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Original file line number Diff line number Diff line change
Expand Up @@ -614,6 +614,11 @@ enum cpuinfo_uarch {
/** Apple A18 pro processor (little cores). */
cpuinfo_uarch_tahiti_sawtooth = 0x00700207,

/** Apple M4 processor (big cores). */
cpuinfo_uarch_donan_everest = 0x00700308,
/** Apple M4 processor (little cores). */
cpuinfo_uarch_donan_sawtooth = 0x00700309,

/** Cavium ThunderX. */
cpuinfo_uarch_thunderx = 0x00800100,
/** Cavium ThunderX2 (originally Broadcom Vulkan). */
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6 changes: 5 additions & 1 deletion src/arm/mach/init.c
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Expand Up @@ -148,7 +148,11 @@ static enum cpuinfo_uarch decode_uarch(uint32_t cpu_family, uint32_t core_index,
/* Hexa-core: 2x Avalanche + 4x Blizzard */
return core_index + 4 < core_count ? cpuinfo_uarch_tahiti_everest
: cpuinfo_uarch_tahiti_sawtooth;

case CPUFAMILY_ARM_DONAN: /* M4 */
/* 10-core: 4x Donan Everest + 6x Donan Sawtooth */
case CPUFAMILY_ARM_BRAVA: /* M4 Pro */
/* 14-core: 10x Donan Everest + 4x Donan Sawtooth */
return core_index + 4 < core_count ? cpuinfo_uarch_donan_everest : cpuinfo_uarch_donan_sawtooth;
default:
/* Use hw.cpusubtype for detection */
break;
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4 changes: 4 additions & 0 deletions tools/cpu-info.c
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Expand Up @@ -306,6 +306,10 @@ static const char* uarch_to_string(enum cpuinfo_uarch uarch) {
return "Tahiti_Everest";
case cpuinfo_uarch_tahiti_sawtooth:
return "Tahiti_Sawtooth";
case cpuinfo_uarch_donan_everest:
return "Donan Everest";
case cpuinfo_uarch_donan_sawtooth:
return "Donan Sawtooth";
case cpuinfo_uarch_thunderx:
return "ThunderX";
case cpuinfo_uarch_thunderx2:
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