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SubjectRe: [PATCH 16/19] kvm: x86: Introduce KVM_{G|S}ET_XSAVE2 ioctl
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.


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