CVS commit: src/sys/arch/x86

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

Module Name:    src
Committed By:   imil
Date:           Fri May  2 07:08:11 UTC 2025

Modified Files:
        src/sys/arch/x86/include: apicvar.h
        src/sys/arch/x86/x86: cpu.c identcpu_subr.c lapic.c

Log Message:
Add support for CPUID leaf 0x40000010 to detect TSC and LAPIC frequency on
hypervisors implementing the VMware-defined interface

This change enables virtual machines to obtain TSC and LAPIC frequency
information directly from the hypervisor via CPUID leaf 0x40000010, avoiding
the need for runtime calibration, thus reducing boot speed in supported
environments.

Tested on GENERIC and MICROVM kernels, QEMU/KVM and QEMU/NVMM (current and
10.1), Intel and AMD CPUs, NetBSD/amd64 and i386.


To generate a diff of this commit:
cvs rdiff -u -r1.10 -r1.11 src/sys/arch/x86/include/apicvar.h
cvs rdiff -u -r1.213 -r1.214 src/sys/arch/x86/x86/cpu.c
cvs rdiff -u -r1.13 -r1.14 src/sys/arch/x86/x86/identcpu_subr.c
cvs rdiff -u -r1.92 -r1.93 src/sys/arch/x86/x86/lapic.c

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