[lkml]   [2021]   [May]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH RFC 4/7] kvm: x86: Add new ioctls for XSAVE extension
On Sat, Feb 6, 2021 at 11:00 PM Jing Liu <> wrote:
> The static xstate buffer kvm_xsave contains the extended register
> states, but it is not enough for dynamic features with large state.
> Introduce a new capability called KVM_CAP_X86_XSAVE_EXTENSION to
> detect if hardware has XSAVE extension (XFD). Meanwhile, add two
> new ioctl interfaces to get/set the whole xstate using struct
> kvm_xsave_extension buffer containing both static and dynamic
> xfeatures. Reuse fill_xsave and load_xsave for both cases.
> Signed-off-by: Jing Liu <>
> ---

> +#define KVM_GET_XSAVE_EXTENSION _IOW(KVMIO, 0xa4, struct kvm_xsave_extension)
> +#define KVM_SET_XSAVE_EXTENSION _IOW(KVMIO, 0xa5, struct kvm_xsave_extension)
Isn't the convention to call these KVM_GET_XSAVE2 and KVM_SET_XSAVE2?

Do you have any documentation to add to Documentation/virt/kvm/api.rst?

 \ /
  Last update: 2021-05-25 00:07    [W:0.221 / U:2.340 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site