4 Jan
2022
4 Jan
'22
6:58 p.m.
On Tue, Jan 04, 2022, Paolo Bonzini wrote:
On 12/29/21 02:04, Sean Christopherson wrote:
Speaking of nested, interception of #NM in vmx_update_exception_bitmap() is wrong with respect to nested guests. Until XFD is supported for L2, which I didn't see in this series, #NM should not be intercepted while L2 is running.
Why wouldn't L2 support XFD, since there are no new VMCS bits? As long as L0 knows what to do with XFD and XFD_ERR, it will do the right thing no matter if L1 or L2 is running.
I incorrectly assumed there was something L0 needed to do in order to support nested XFD.