Re: [PATCH 0/2] x86: per-device dma_mapping_ops
- Date: Thu, 15 May 2008 18:16:19 +0900
- From: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
- Subject: Re: [PATCH 0/2] x86: per-device dma_mapping_ops
On Thu, 15 May 2008 11:01:09 +0200
Andi Kleen <andi@xxxxxxxxxxxxxx> wrote:
> FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx> writes:
>
> > This patchset adds per-device dma_mapping_ops support for
> > CONFIG_X86_64 like POWER architecture does. This change enables us to
> > cleanly fix the Calgary IOMMU issue that some devices are not behind
> > the IOMMU [1]. It also would be helpful to handle KVM PCI passthrough.
>
> This makes it basically impossible to do stack ops, which some
> people have been doing.
Seems that I misunderstand what those people want.
What those people want to do and how the stack ops achieve it? Or can
you tell me where their patches are?
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