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SubjectRe: [PATCH -tip] x86: fix iommu=soft boot option
FUJITA Tomonori wrote:
> On Wed, 2 Dec 2009 17:07:24 +0900
> FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> wrote:
>
>> On Tue, 01 Dec 2009 23:55:28 -0800
>> Yinghai Lu <yinghai@kernel.org> wrote:
>>
>>>>>>> amd 64 systems that
>>>>>>> 1. do not have AGP
>>>>>>> 2. do not have IOMMU
>>>>>>> 3. mem > 4g
>>>>>>> 4. BIOS do not allocate correct gart in NB.
>>>>>>> will leave them to use SWIOTLB forcely.
>>>>>> As I asked earlier, can you tell me what dma ops such system is
>>>>>> supposed to use?
>>>>> gart_dma_ops
>>>> How does gart_dma_ops work on systems without IOMMU?
>>> ?
>> If a system doesn't have IOMMU, what does gart_dma_ops do?
>
> Ping?

gart can do hw translation...

YH


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