On 12/14/21 08:06, Tian, Kevin wrote:
- if (dynamic_enabled & ~guest_fpu->user_perm) != 0, then this is a
userspace error and you can #GP the guest without any issue. Userspace
is buggy
Is it a general guideline that an error caused by emulation itself (e.g.
due to no memory) can be reflected into the guest as #GP, even
when from guest p.o.v there is nothing wrong with its setting?
No memory is a tricky one, if possible it should propagate -ENOMEM up to
KVM_RUN or KVM_SET_MSR. But it's basically an impossible case anyway,
because even with 8K TILEDATA we're within the limit of
PAGE_ALLOC_COSTLY_ORDER.
So, since it's not easy to do it right now, we can look at it later.
Paolo
