qemu-devel
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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




reply via email to

[Prev in Thread] Current Thread [Next in Thread]