linux-kernel - Re: [patch 0/4] Intel IOMMU Supspend/Resume Support

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Message-Id: <1238454102.25797.284.camel@macbook.infradead.org>
Date:	Tue, 31 Mar 2009 00:01:42 +0100
From:	David Woodhouse <dwmw2@...radead.org>
To:	Fenghua Yu <fenghua.yu@...el.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Andrew Lutomirski <amluto@...il.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Kyle McMartin <kyle@...hat.com>,
	Yinghai Lu <yinghai@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	IOMMU <iommu@...ts.linux-foundation.org>
Subject: Re: [patch 0/4] Intel IOMMU Supspend/Resume Support

On Fri, 2009-03-27 at 14:22 -0700, Fenghua Yu wrote:
> Current Intel IOMMU does not support suspend and resume. In S3 event, kernel
> crashes when DMAR or interrupt remapping is running.
> 
> The attached patch set implements the suspend and resume feature for Intel
> IOMMU. It hooks to kernel suspend and resume interface. When suspend happens, itsaves necessary hardware registers. When resume happens, it restores the
> registers and restarts IOMMU.
> 
> This patch set can be applied on the tip tree. 

Looks good to me, apart from the fact that your #4 patch actually needs
to come before #1. Shall I apply it to my iommu-2.6.git tree or let Ingo
take it? If the latter, 

Acked-by: David Woodhouse <David.Woodhouse@...el.com>
Acked-by: David Woodhouse <David.Woodhouse@...el.com>
Acked-by: David Woodhouse <David.Woodhouse@...el.com>
Acked-by: David Woodhouse <David.Woodhouse@...el.com>

(if you look carefully, you'll see those are in order 4, 1, 2, 3)

Have we tested this on IA64?

-- 
David Woodhouse                            Open Source Technology Centre
David.Woodhouse@...el.com                              Intel Corporation

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