On 12/02/21 21:56, Jim Mattson wrote:
Not all, we intercept GPs only under a specific condition - just as we
do for vmware_backdoor and for the recent amd errata. IMO, I think it's the right
tradeoff to make to get guest exceptions right.
It sounds like I need to get you in my corner to help put a stop to
all of the incorrect #UDs that kvm is going to be raising in lieu of
#PF when narrow physical address width emulation is enabled!
Ahah :) Apart from the question of when you've entered diminishing
returns, one important thing to consider is what the code looks like.
This series is not especially pretty, and that's not your fault. The
whole idea of special decoding for #GP is a necessary evil for the
address-check errata, but is it worth extending it to the corner case of
INVPCID for CPL>0?
Paolo
