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Differential D57700

linuxkpi: Add x86 CPU ID matching functions and macros
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Authored by dumbbell on Jun 20 2026, 12:02 PM.
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kib
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linuxkpi
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rG5fb3aea2d8c4: linuxkpi: Add x86 CPU ID matching functions and macros
Summary

There are two parts that go together:

  • X86_MATCH_VFM() to declare a matching pattern
  • x86_match_cpu() to check if the current CPU matches one of the patterns in an array.

The i915 DRM driver started to use this in Linux 6.14.

This is part of the update of DRM drivers to Linux 6.14.

Sponsored by: The FreeBSD Foundation

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rG FreeBSD src repository
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Event Timeline

dumbbell created this revision.Jun 20 2026, 12:02 PM
Herald added subscribers: emaste, imp. · View Herald TranscriptJun 20 2026, 12:02 PM
dumbbell requested review of this revision.Jun 20 2026, 12:02 PM
dumbbell added a parent revision: D57699: linuxkpi: Defined more Intel vendor/family/model constants.Jun 20 2026, 12:07 PM
dumbbell added a child revision: D57701: linuxkpi: Add `kthread_run_worker()`.
emaste added inline comments.Aug 4 2026, 5:51 PM
sys/compat/linuxkpi/common/src/linux_compat.c
3111

is this a copy-paste of above?

emaste added a project: linuxkpi.Aug 17 2026, 5:00 PM
dumbbell updated this revision to Diff 185649.Wed, Sep 2, 9:02 PM

Fix issue reported by @emaste

bz added a reviewer: kib.Mon, Sep 7, 8:02 PM
bz added a subscriber: bz.

Does this compile on arm64 or does it need #if defined(amd64) || defined(i386) guards?

Also adding kib for the field checks as I do not know them.

kib added inline comments.Mon, Sep 7, 11:23 PM
sys/compat/linuxkpi/common/include/linux/mod_devicetable.h
98

Is this a good choice for max stepping, while x86_cpu_id uses uint16_t for the steppings member? Was the constant copied from Linux?

sys/compat/linuxkpi/common/src/linux_compat.c
3096
3098

'{' should be on the previous line, by style,

3112
dumbbell marked 5 inline comments as done.Thu, Sep 10, 6:23 PM
dumbbell added inline comments.
sys/compat/linuxkpi/common/include/linux/mod_devicetable.h
98

Yes, it is the same value on Linux 6.15.

dumbbell updated this revision to Diff 186403.Thu, Sep 10, 6:23 PM
dumbbell marked an inline comment as done.

Address feedback from @kib

kib accepted this revision.Thu, Sep 10, 11:44 PM
This revision is now accepted and ready to land.Thu, Sep 10, 11:44 PM
Closed by commit rG5fb3aea2d8c4: linuxkpi: Add x86 CPU ID matching functions and macros (authored by dumbbell). · Explain WhyMon, Sep 14, 8:12 PM
This revision was automatically updated to reflect the committed changes.
dumbbell added a commit: rG5fb3aea2d8c4: linuxkpi: Add x86 CPU ID matching functions and macros.

Revision Contents
Changeset List

PathSize
sys/
compat/
linuxkpi/
common/
include/
asm/
25 lines
linux/
2 lines
17 lines
src/
37 lines

Diff 186720

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sys/compat/linuxkpi/common/include/asm/cpu_device_id.h

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sys/compat/linuxkpi/common/include/linux/bits.h

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sys/compat/linuxkpi/common/include/linux/mod_devicetable.h

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sys/compat/linuxkpi/common/src/linux_compat.c

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