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RE: [Xen-devel] tsc_mode == 1 and hvm guests

To: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>
Subject: RE: [Xen-devel] tsc_mode == 1 and hvm guests
From: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Date: Mon, 10 May 2010 15:55:09 +0100
Cc: "Xu, Dongxiao" <dongxiao.xu@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Keir Fraser <Keir.Fraser@xxxxxxxxxxxxx>, "Zhang, Xiantao" <xiantao.zhang@xxxxxxxxx>, Stefano Stabellini <Stefano.Stabellini@xxxxxxxxxxxxx>
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On Mon, 10 May 2010, Dan Magenheimer wrote:
> Is it an objective for hybrid VMs to work on 4.0.1?
> I think the fix only is required for hybrid VM's
> and the rest is cleanup.  Is that correct, Stefano?

it is required to use VIRQ_TIMER on HVM, an hybrid VM would work anyway
falling back to the emulated timer.
Also I believe that migrating to a guest that has a different tsc rate
was broken (on HVM) before my patch.

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