linux-kernel - Re: [Xen-devel] [PATCH/RFC] Fix xsave bug on older Xen hypervisors

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Message-ID: <504B1DC3.1000604@redhat.com>
Date:	Sat, 08 Sep 2012 12:28:19 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Stefan Bader <stefan.bader@...onical.com>
CC:	Jan Beulich <JBeulich@...e.com>, Matt Wilson <msw@...zon.com>,
	"Justin M. Forbes" <jmforbes@...uxtx.org>, xen-devel@...ts.xen.org,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [Xen-devel] [PATCH/RFC] Fix xsave bug on older Xen hypervisors

Il 07/09/2012 18:13, Stefan Bader ha scritto:
> This would make it save again _if_ the HV failing to handle the writes to CR4
> (which iirc the kernel code still does when the cpuid bit is set) does have at
> least the patch to mask off the cpuid bits (the one Ian mentioned)

Given how old it is, that's very unlikely.  You can download CentOS 5.0
from http://mirror.stanford.edu/yum/pub/centos/5/isos/x86_64/ or get the
source RPM for the RHEL5.0 kernel (including the Xen hypervisor) at
ftp://ftp.redhat.com/redhat/linux/enterprise/5Client/en/os/SRPMS/kernel-2.6.18-8.el5.src.rpm

Paolo
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