git: feat: acpi: install Darwin _OSI on Apple hardware

[Matthew Dillon]

commit 7e4f5e5ddde1db4b6680a9254edef7d62ce6d7a5
Author: Abdelkader Boudih <dragonflybsd at seuros.com>
Date:   Wed May 6 19:41:48 2026 +0000

    feat: acpi: install Darwin _OSI on Apple hardware
    
    Apple firmware checks _OSI("Darwin") during ACPI init and sets
    OSYS=0x2710, making OSDW() return 1.  Many device methods gate
    behind OSDW() for GPU visibility, Thunderbolt, and power management.
    
    Add hw.acpi.apple_darwin_osi tunable (default 1) that installs the
    Darwin interface and disables Windows vendor strings on Apple hardware,
    matching Linux and FreeBSD behavior.
    
    Register apple_fw in the kernel build system (sys/conf/files).
    
    The apple_fw driver reads the tunable and falls back to a late fixup
    (re-evaluate PINI or direct OSYS poke) when the early path missed,
    while respecting the user's choice when the tunable is disabled.

Summary of changes:
 sys/conf/files              |  3 ++
 sys/dev/acpica/acpi.c       | 34 ++++++++++++++++++++++
 sys/dev/apple/fw/apple_fw.c | 70 +++++++++++++++++++++++++++++++++++++++++++--
 3 files changed, 105 insertions(+), 2 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/7e4f5e5ddde1db4b6680a9254edef7d62ce6d7a5


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