From: Paolo Bonzini <pbonzini@redhat.com>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
rkrcmar@redhat.com, Wanpeng Li <wanpeng.li@linux.intel.com>,
stable@vger.kernel.org, x86@kernel.org,
"H. Peter Anvin" <hpa@linux.intel.com>
Subject: Re: [PATCH 1/9] x86: export get_xsave_addr
Date: Thu, 04 Dec 2014 18:29:03 +0100 [thread overview]
Message-ID: <548099DF.4080202@redhat.com> (raw)
In-Reply-To: <20141204163443.GA1477@kroah.com>
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
next prev parent reply other threads:[~2014-12-04 17:29 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1417708634-24333-1-git-send-email-pbonzini@redhat.com>
2014-12-04 15:57 ` [PATCH 1/9] x86: export get_xsave_addr Paolo Bonzini
2014-12-04 16:34 ` Greg KH
2014-12-04 17:29 ` Paolo Bonzini [this message]
2014-12-04 15:57 ` [PATCH 2/9] KVM: x86: support XSAVES usage in the host Paolo Bonzini
2014-12-04 17:56 ` Radim Krčmář
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