CVS commit: src/sys/dev/nvmm/x86

["Maxime Villard" <maxv%netbsd.org@localhost>]

Module Name:    src
Committed By:   maxv
Date:           Thu Jan 10 06:58:37 UTC 2019

Modified Files:
        src/sys/dev/nvmm/x86: nvmm_x86_svm.c nvmm_x86_svmfunc.S

Log Message:
Optimize:

 * Don't save/restore the host CR2, we don't care because we're not in a
   #PF context (and preemption switches already handle CR2 safely).

 * Don't save/restore the host FS and GS, just reset them to zero after
   VMRUN. Note: DS and ES must be reset _before_ VMRUN, but that doesn't
   apply to FS and GS.

 * Handle FSBASE and KGSBASE outside of the VCPU loop, to avoid the cost
   of saving/restoring them when there's no reason to leave the loop.


To generate a diff of this commit:
cvs rdiff -u -r1.13 -r1.14 src/sys/dev/nvmm/x86/nvmm_x86_svm.c
cvs rdiff -u -r1.1 -r1.2 src/sys/dev/nvmm/x86/nvmm_x86_svmfunc.S

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