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

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Message-ID: <cb0375e10903280724s22b231f8w81593c23ca90c288@mail.gmail.com>
Date:	Sat, 28 Mar 2009 10:24:45 -0400
From:	Andrew Lutomirski <amluto@...il.com>
To:	Fenghua Yu <fenghua.yu@...el.com>
Cc:	Ingo Molnar <mingo@...e.hu>, David Woodhouse <dwmw2@...radead.org>,
	Suresh Siddha <suresh.b.siddha@...el.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

Works for me (applied to current -tip).  I suspended and resumed just
fine, with no errors logged and all hardware apparently still working.

Tested-by: Andy Lutomirski <amluto@...il.com>

Thanks for the patch!
Andy

On Fri, Mar 27, 2009 at 5:22 PM, Fenghua Yu <fenghua.yu@...el.com> 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.
>
> --
>
>
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