git: nvmm: Optimize DB regs save & restore

[Aaron LI]

commit b3f7271ce8a6736910e3e66d2fff5ddf4bd2c570
Author: Aaron LI <aly at aaronly.me>
Date:   Sun Jul 18 16:32:04 2021 +0800

    nvmm: Optimize DB regs save & restore
    
    Check PCB_DBREGS flag before save/restore DB regs.  If the current
    thread doesn't use DB regs, then no need to save & restore them.
    
    Meanwhile, revert to use x86_dbregs_save() and x86_dbregs_restore()
    for the NetBSD code.
    
    This is a partial revert of commit:
    "nvmm: Save host DB regs in per-cpu structure"

Summary of changes:
 sys/dev/virtual/nvmm/x86/nvmm_x86.h | 64 ++++++++++++++++++++++++-------------
 1 file changed, 42 insertions(+), 22 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/b3f7271ce8a6736910e3e66d2fff5ddf4bd2c570


-- 
DragonFly BSD source repository