CVSROOT: /cvs
Module name: src
Changes by: [email protected] 2023/01/29 19:32:01
Modified files:
sys/arch/amd64/amd64: vmm.c
sys/arch/amd64/include: cpufunc.h vmmvar.h
Log message:
vmm(4): save and restore guest pkru.
Take a simple approach for saving and restoring PKRU if the host
has PKE support enabled. Uses explicit rdpkru/wrpkru instructions
for now instead of xsave.
This functionality is still gated behind amd64 pmap checking for
operation under a hypervisor as well as vmm masking the cpuid bit
for PKU.
"if your diff is good, then commit it" -deraadt@
