Re: [PATCH 1/9] x86: export get_xsave_addr

Paolo Bonzini
2014-12-04T17:29:03Z

On 04/12/2014 17:34, Greg KH wrote:
> On Thu, Dec 04, 2014 at 04:57:06PM +0100, Paolo Bonzini wrote:
>> > get_xsave_addr is the API to access XSAVE states, and KVM would
>> > like to use it. Export it.
> Use it in what way?

As in patch 2/9, to avoid that upgrading to a newer processor breaks
userspace ABI.

>> > Cc: stable@vger.kernel.org
> Why is this a stable patch?

Because as of now, Skylake processors have a different userspace ABI
than previous generations.

Paolo