From: Joerg Roedel <joerg.roedel@amd.com>
To: Dave Airlie <airlied@gmail.com>
Cc: Dave Airlie <airlied@linux.ie>,
David Woodhouse <dwmw2@infradead.org>,
Joerg Roedel <joro@8bytes.org>,
Zhenyu Wang <zhenyu.z.wang@intel.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"fujita.tomonori@lab.ntt.co.jp" <fujita.tomonori@lab.ntt.co.jp>,
"iommu@lists.linux-foundation.org"
<iommu@lists.linux-foundation.org>,
"mingo@redhat.com" <mingo@redhat.com>,
David Miller <davem@davemloft.net>,
"eric@anholt.net" <eric@anholt.net>
Subject: Re: IOMMU and graphics cards
Date: Tue, 7 Jul 2009 10:54:08 +0200 [thread overview]
Message-ID: <20090707085408.GO5380@amd.com> (raw)
In-Reply-To: <0DDD3FAD-969A-421B-A36A-77AB645E8BCA@gmail.com>
On Tue, Jul 07, 2009 at 08:00:01AM +1000, Dave Airlie wrote:
>
> Could you also enumerate any limitations of the IOMMUs on the amount
> of memory they can remap per device if any.
The AMD IOMMU driver in 2.6.31-rcX can map up to 4GB per domain. If the
gfx card has a domain of its own it can use all of the 4GB.
I am not 100% sure about VT-d, but as far as I understood the allocator
it doesn't have that 4GB limitation per domain.
Joerg
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next prev parent reply other threads:[~2009-07-07 8:54 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-28 15:05 IOMMU and graphics cards Joerg Roedel
2009-04-28 15:28 ` David Woodhouse
2009-04-28 16:04 ` Joerg Roedel
2009-05-07 7:47 ` FUJITA Tomonori
2009-05-07 10:01 ` Joerg Roedel
2009-05-07 10:22 ` David Woodhouse
2009-05-07 10:42 ` FUJITA Tomonori
2009-05-07 12:15 ` Joerg Roedel
2009-05-07 12:59 ` FUJITA Tomonori
2009-05-07 14:37 ` Joerg Roedel
2009-05-07 17:04 ` Christoph Hellwig
2009-05-07 18:36 ` David Miller
2009-05-08 9:35 ` Joerg Roedel
2009-07-06 12:26 ` David Woodhouse
2009-07-06 13:11 ` Joerg Roedel
2009-07-06 14:18 ` David Woodhouse
2009-07-06 21:35 ` Dave Airlie
2009-07-06 22:00 ` Dave Airlie
2009-07-07 8:54 ` Joerg Roedel [this message]
2009-07-07 15:24 ` Duran, Leo
2009-07-07 15:33 ` Duran, Leo
2009-07-07 15:36 ` David Woodhouse
2009-07-07 8:59 ` Joerg Roedel
2009-07-07 9:16 ` David Woodhouse
2009-07-07 9:05 ` David Woodhouse
2009-05-07 10:23 ` FUJITA Tomonori
2009-05-07 11:01 ` Ingo Molnar
2009-05-07 11:14 ` FUJITA Tomonori
2009-05-07 11:26 ` Ingo Molnar
2009-05-07 12:00 ` Joerg Roedel
2009-05-07 10:55 ` Ingo Molnar
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