From: "Justin T. Gibbs" <gibbs@scsiguy.com>
To: Keir Fraser <keir.fraser@eu.citrix.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: Re: [PATCH 0 of 5] Add support for mapping grant references into HVM guests (+ some cleanup)
Date: Fri, 08 Jan 2010 16:43:38 -0700 [thread overview]
Message-ID: <4B47C32A.8010802@scsiguy.com> (raw)
In-Reply-To: <C75158C9.4C5B%keir.fraser@eu.citrix.com>
On 12/18/2009 9:05 AM, Keir Fraser wrote:
> Support is already in the tree and will be part of Xen 4.0. See xen-unstable
> changeset 19932:c0cb307d927f.
>
> -- Keir
>
I have successfully integrated the 4.0 change into my 3.4.1 test
system. The changes works as expected
so long as the I/O is serviced via a copy from memory owned by the
device domain. However, iommu
mappings are not updated for HVM grant table updates so it is not
possible to use DMA. I am experimenting
with changes to update the iommu for p2m_grant_map* types but wonder is
some overarching
architectural consideration I'm missing that would explain why the iommu
was not updated in the original
changes?
--
Justin
next prev parent reply other threads:[~2010-01-08 23:43 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-18 15:26 [PATCH 0 of 5] Add support for mapping grant references into HVM guests (+ some cleanup) Justin T. Gibbs
2009-12-18 16:05 ` Keir Fraser
2010-01-08 23:43 ` Justin T. Gibbs [this message]
-- strict thread matches above, loose matches on Subject: below --
2009-05-19 11:27 steven.smith
2009-05-25 2:36 ` Isaku Yamahata
2009-05-26 9:23 ` Steven Smith
2009-05-26 10:55 ` Isaku Yamahata
2009-05-26 11:46 ` Steven Smith
2009-05-26 12:24 ` Isaku Yamahata
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