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Re: [Qemu-devel] [PATCH 1/2] Fix real mode guest migration
From: |
Eric Blake |
Subject: |
Re: [Qemu-devel] [PATCH 1/2] Fix real mode guest migration |
Date: |
Mon, 22 Jul 2013 10:37:03 -0600 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130625 Thunderbird/17.0.7 |
On 07/22/2013 12:49 AM, Orit Wasserman wrote:
> Older KVM versions save CS dpl value to an invalid value for real mode guests
> (0x3). This patch detect this situation when loading CPU state and set all the
> segments dpl to zero.
> This will allow migration from older KVM on host without unrestricted guest
> to hosts with restricted guest support.
> For example migration from a Penryn host (with kernel 2.6.32) to
> a Westmere host.
> + /*
> + Real mode guest segments register DPL should be zero.
> + Older KVM version were setting it worngly.
s/worngly/wrongly/
> + Fixing it will allow live migration from such host that don't have
> + restricted guest support to an host with unrestricted guest support
s/an host/a host/
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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Re: [Qemu-devel] [PATCH 1/2] Fix real mode guest migration, Anthony Liguori, 2013/07/22
Re: [Qemu-devel] [PATCH 1/2] Fix real mode guest migration, Juan Quintela, 2013/07/22
Re: [Qemu-devel] [PATCH 1/2] Fix real mode guest migration,
Eric Blake <=