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[Xen-devel] [PATCH 1/4] XSAVE/XRSTOR: Fix frozen states

To: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
From: "Han, Weidong" <weidong.han@xxxxxxxxx>
Date: Tue, 31 Aug 2010 10:59:46 +0800
Accept-language: en-US
Acceptlanguage: en-US
Cc: "jeremy@xxxxxxxx" <jeremy@xxxxxxxx>, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Delivery-date: Mon, 30 Aug 2010 20:06:12 -0700
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
Thread-index: ActIuJGPgmm/hsluQmCSBxFZkZfG2w==
Thread-topic: [Xen-devel] [PATCH 1/4] XSAVE/XRSTOR: Fix frozen states

If a guest sets a state and dirties the state, but later temporarily clears the 
state, and at this time this vcpu is scheduled out, then other vcpus may 
corrupt the state before the vcpu is scheduled in again, thus the state cannot 
be restored correctly. To solve this issue, this patch save/restore all states 
unconditionally on vcpu context switch.

Signed-off-by: Weidong Han <weidong.han@xxxxxxxxx>

Attachment: fix-xsave.patch
Description: fix-xsave.patch

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