commit f6c0185203d8a0e5955a47e12e0efad053b88532 Author: Aaron LI <a...@aaronly.me> Date: Fri Jul 9 12:50:33 2021 +0800
nvmm: Save host DB regs in per-cpu structure * The host DB regs save/restore operations are performed outside the hard interrupt disablement. If the DB regs were saved in curthread's PCB, an interrupt thread running just after hard interrupts are enabled again could overwrite the DB regs in the PCB with the guest DB regs. Saving the host DB regs in the per-cpu structure avoid such issues. * This change also makes the code a bit more OS-independent. Credit-to: Matt Dillon Referred-to: FreeBSD bhyve Summary of changes: sys/dev/virtual/nvmm/x86/nvmm_x86.h | 63 ++++++++++++--------------------- sys/dev/virtual/nvmm/x86/nvmm_x86_svm.c | 5 +-- sys/dev/virtual/nvmm/x86/nvmm_x86_vmx.c | 5 +-- 3 files changed, 28 insertions(+), 45 deletions(-) http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/f6c0185203d8a0e5955a47e12e0efad053b88532 -- DragonFly BSD source repository