From: Keir Fraser <keir.fraser@eu.citrix.com>
To: Jan Beulich <jbeulich@novell.com>, Haitao Shan <haitao.shan@intel.com>
Cc: "'xen-devel@lists.xensource.com'" <xen-devel@lists.xensource.com>
Subject: Re: [PATCH] Dom0 Kernel - Fixes for saving/restoringMSI/MSI-X across Dom0 S3
Date: Mon, 24 Nov 2008 12:03:37 +0000 [thread overview]
Message-ID: <C5504899.2950B%keir.fraser@eu.citrix.com> (raw)
In-Reply-To: <492AA0F0.76E4.0078.0@novell.com>
On 24/11/08 11:41, "Jan Beulich" <jbeulich@novell.com> wrote:
>>>> "Shan, Haitao" <haitao.shan@intel.com> 24.11.08 12:03 >>>
>> With this patch, MSI/MSI-X capabilities and tables are saved in Dom0 when
>> S3 and restored when resume. Actually, this is also the approach that
>> kernel takes. The only concern is that Dom0 should not touch MSI/MSI-X,
>> they are owned by VMM itself. Maybe adding a hypercall to instruct Xen to
>> do the saving/restoring is good. I wonder whether the reason is strong
>> enough for adding a hypercall for such purpose.
>
> Is it at all necessary to use a hypercall here? Shouldn't Xen itself be able
> to
> do the necessary saving/restoring (just like it does for IO-APIC)?
I was thinking the same thing. Haitao: shall I hold off on your original
patch while we think about this?
-- Keir
next prev parent reply other threads:[~2008-11-24 12:03 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-24 11:03 [PATCH] Dom0 Kernel - Fixes for saving/restoring MSI/MSI-X across Dom0 S3 Shan, Haitao
2008-11-24 11:41 ` [PATCH] Dom0 Kernel - Fixes for saving/restoringMSI/MSI-X " Jan Beulich
2008-11-24 12:03 ` Keir Fraser [this message]
2008-11-24 12:53 ` Tian, Kevin
2008-11-24 13:35 ` [PATCH] Dom0 Kernel - Fixes forsaving/restoringMSI/MSI-X " Jan Beulich
2008-11-24 13:45 ` Tian, Kevin
2008-11-24 13:55 ` Shan, Haitao
2008-11-24 15:32 ` Jan Beulich
2008-11-25 1:21 ` Shan, Haitao
2008-11-24 13:45 ` [PATCH] Dom0 Kernel - Fixes for saving/restoringMSI/MSI-X " Shan, Haitao
2008-11-24 14:15 ` [PATCH] Dom0 Kernel - Fixes for saving/restoring MSI/MSI-X " Keir Fraser
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