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Re: [Qemu-devel] [PATCH v2] pci: Introduce helper to retrieve a PCI devi
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH v2] pci: Introduce helper to retrieve a PCI device's DMA address space |
Date: |
Fri, 09 Aug 2013 12:29:09 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130625 Thunderbird/17.0.7 |
Il 09/08/2013 12:20, Benjamin Herrenschmidt ha scritto:
> On Fri, 2013-08-09 at 11:40 +0200, Paolo Bonzini wrote:
>> (BTW, do you need to enable bus-master DMA on PCI bridges, to do DMA
>> for devices sitting on the secondary bus?)
>
> In theory yes though I have seen bridges who ignore it...
And we would need a compatibility property anyway. So let's choose to
be among the ones who ignore it (i.e. the same as this patch). But it
needs a comment.
Paolo
Re: [Qemu-devel] [PATCH v2] pci: Introduce helper to retrieve a PCI device's DMA address space, Benjamin Herrenschmidt, 2013/08/09
- Re: [Qemu-devel] [PATCH v2] pci: Introduce helper to retrieve a PCI device's DMA address space,
Paolo Bonzini <=