CVS commit: [netbsd-11] src/sys/dev/nvmm/x86

["Martin Husemann" <martin%netbsd.org@localhost>]

Module Name:    src
Committed By:   martin
Date:           Wed Jun  3 18:33:24 UTC 2026

Modified Files:
        src/sys/dev/nvmm/x86 [netbsd-11]: nvmm_x86_svm.c nvmm_x86_vmx.c

Log Message:
Pull up following revision(s) (requested by yamt in ticket #298):

        sys/dev/nvmm/x86/nvmm_x86_svm.c: revision 1.95
        sys/dev/nvmm/x86/nvmm_x86_vmx.c: revision 1.95

nvmm: remove cpuid leaf 0x40000010
* given the lapic bit disabled, (PR/59424) [1]
  this leaf doesn't seem to have much benefit anymore.
  as nvmm is used in other platforms, (dragonfly bsd)
  it's better to avoid guest ABI changes without clear benefits.
* I couldn't find any documenation about what RBX=0 means.
  (vmware or kvm)

we can revisit this when/if someone comes up with a better
implementation. (probably userland-assisted one)
discussed on source-changes-d. [2]

reviewed by Taylor R Campbell.

[1] https://mail-index.netbsd.org/source-changes/2026/05/01/msg161786.html
[2] https://mail-index.netbsd.org/source-changes-d/2026/05/01/msg014654.html


To generate a diff of this commit:
cvs rdiff -u -r1.89.2.1 -r1.89.2.2 src/sys/dev/nvmm/x86/nvmm_x86_svm.c
cvs rdiff -u -r1.90.2.2 -r1.90.2.3 src/sys/dev/nvmm/x86/nvmm_x86_vmx.c

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