On 2017/7/13 17:02, Paolo Bonzini wrote:
On 13/07/2017 10:53, Yang Zhang wrote:
Even if it is restored correctly, you will have the wrong PKRU on the
host between kvm_load_guest_fpu and entering the guest.
Before kvm_load_guest_fpu or after? kvm_load_guest_fpu will load the
right pkru.
It's the right pkru for the guest, but the wrong for the host. And if
vmx->guest_pkru_valid is true for whatever reason, it will be
overwritten in vmx_vcpu_run.
ok, i see. You want to load guest pkru just before vmentry to avoid the
potential conflicts.
Paolo
--
Yang
Alibaba Cloud Computing
