On 12/16/21 09:25, Wang, Wei W wrote:
It's still easier to return the full size of the buffer from
KVM_CHECK_EXTENSION(KVM_CAP_XSAVE2). It makes the userspace code
a bit easier.
OK. For the "full size" returned to userspace, would you prefer to
directly use the value retrieved from guest CPUID(0xd), or get it
from guest_fpu (i.e. fpstate->user_size)? (retrieved from CPUID will
be the max size and should work fine as well)
It is okay to reflect only the bits that were enabled in prctl, but
please document it in api.rst as well.
Paolo
