Identify Apple M4 Seymour and add JackS config#2033
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ph0enix1974 wants to merge 1 commit intofreebsd:mainfrom
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Identify Apple M4 Seymour and add JackS config#2033ph0enix1974 wants to merge 1 commit intofreebsd:mainfrom
ph0enix1974 wants to merge 1 commit intofreebsd:mainfrom
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arm64: Add CPU identification for Apple M3 (Sawtooth/Malacca) and M4 (Seymour/Tahoe) series Extend the Apple CPU part definitions in cpu.h and the identification table in identcpu.c to include M3 and M4 models, as well as virtualized Apple CPUs (e.g., UTM/Framework fallback). This provides better strings in dmesg, sysctl hw.model, etc., on newer Apple Silicon hardware. No functional/behavioral changes; purely cosmetic/enhancement. Includes reordering for logical grouping (M3 before M4). Signed-off-by: Jack Seredyniecki <jack@it-wise.com>
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Where did the names come from? |
Author
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The PartNum values and codenames are from direct MIDR_EL1 reads on real
M3/M4 hardware via a Linux guest VM in UTM (Apple Virtualization.framework
on macOS host). In the guest user space, `mrs midr_el1` succeeds and
returns the host's actual register values (implementer 0x61, PartNum
0x042/0x043 for M3 variants, 0x052/0x053 for M4).
This matches Asahi Linux patterns for Apple SoC identification (
https://asahilinux.org/docs/hw/cpu/system-registers).
Codenames (Sawtooth/Malacca for M3, Tahoe/Seymour for M4) come from
internal Apple firmware/hardware leaks documented in community sources like
Asahi and The Apple Wiki.
…On Thu, Feb 19, 2026 at 12:57 PM Andrew Turner ***@***.***> wrote:
*zxombie* left a comment (freebsd/freebsd-src#2033)
<#2033 (comment)>
Where did the names come from?
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That page doesn't list any of the code names, and as far as I can tell neither does The Apple Wiki. |
Author
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You're right. My initial research showed those names but I'm unable to
reliably verify them.
Are you ok with using the following descriptors?
case 0x042:
return ("Apple M3 (Efficiency)");
case 0x043:
return ("Apple M3 (Performance)");
case 0x052:
return ("Apple M4 (Efficiency)");
case 0x053:
return ("Apple M4 (Performance)");
…On Fri, Feb 20, 2026 at 7:52 AM Andrew Turner ***@***.***> wrote:
*zxombie* left a comment (freebsd/freebsd-src#2033)
<#2033 (comment)>
That page doesn't list any of the code names, and as far as I can tell
neither does The Apple Wiki.
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Extend Apple CPU part definitions and identification strings to include M3 and M4 models, plus virtualized Apple CPUs (e.g., UTM/Framework fallback).
Improves dmesg, sysctl hw.model, etc. on newer Apple Silicon hardware.
Closes any previous incomplete PRs.