Re: [Xen-devel] [PATCH 0/4] HVM Virtual S3

To:	"Yu, Ke" <ke.yu@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject:	Re: [Xen-devel] [PATCH 0/4] HVM Virtual S3
From:	Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date:	Wed, 16 May 2007 22:59:08 +0100
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On 16/5/07 17:48, "Yu, Ke" <ke.yu@xxxxxxxxx> wrote:

> The main idea is:
> - emulate ACPI PM1A control resiger in QEMU to capture guest S3 request
> - when QEMU capture guest S3 request, it call hypercall to trap to Xen

So why emulate this register in QEMU at all, rather than directly in Xen?
Xen already knows the address of the pm1a block of ports because it emulates
the pmtimer.

 -- Keir

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