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

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

Module Name:    src
Committed By:   maxv
Date:           Mon May 27 18:36:37 UTC 2019

Modified Files:
        src/sys/arch/x86/x86: cpu.c pmap.c svs.c

Log Message:
Change the effect of SVS on the TLB. Keep CR4_PGE set when SVS is enabled,
but don't use PTE_G on the kernel PTEs in general.

Add PTE_G on only a few pages, that are already leaked to userland and do
not contain secrets.

This slightly improves syscall performance.


To generate a diff of this commit:
cvs rdiff -u -r1.169 -r1.170 src/sys/arch/x86/x86/cpu.c
cvs rdiff -u -r1.332 -r1.333 src/sys/arch/x86/x86/pmap.c
cvs rdiff -u -r1.27 -r1.28 src/sys/arch/x86/x86/svs.c

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