CVS commit: src/sys/arch/x86/x86

["Emile iMil Heitor" <imil%netbsd.org@localhost>]

Module Name:    src
Committed By:   imil
Date:           Mon Jan 13 06:35:38 UTC 2025

Modified Files:
        src/sys/arch/x86/x86: mpbios.c

Log Message:
Firecracker and qemu/microvm in MMIO mode don't have ACPI, either
they rely on MP tables, but using it IOAPIC was not detected.
This patch fixes it by adding a Linux-specific behavior, counting
the right amount of entries and then find the IOAPIC entry.
These bugs were found by Colin Percival and described here
https://www.usenix.org/publications/loginonline/freebsd-firecracker

/!\ This needs a new kernel option: MPTABLE_LINUX_BUG_COMPAT


To generate a diff of this commit:
cvs rdiff -u -r1.71 -r1.72 src/sys/arch/x86/x86/mpbios.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.