Re: [PATCH v2 2/3] virtio_ring: Support DMA APIs

From	Christian Borntraeger <borntraeger@de.ibm.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2 2/3] virtio_ring: Support DMA APIs
Date	2015-10-28 09:50 +0100
Message-ID	<qouAF-h4-9@gated-at.bofh.it> (permalink)
References	<qorCN-6TG-5@gated-at.bofh.it> <qorCP-6TG-17@gated-at.bofh.it> <qorWa-70n-7@gated-at.bofh.it> <qos5P-7j5-3@gated-at.bofh.it>
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Am 28.10.2015 um 15:04 schrieb David Woodhouse:
> On Wed, 2015-10-28 at 14:52 +0900, Christian Borntraeger wrote:
>>            000000000059b25a: e32010200004       lg      %r2,32(%r1)
>>           #000000000059b260: e310b0a00004       lg      %r1,160(%r11)
>>           >000000000059b266: 4810100c           lh      %r1,12(%r1)
> 
> Precisely what is that? Is that loading ->archdata.dev_ops (offset 160)
> from a device and then trying to find the ->unmap_page method therein?
> 

qemu 2.4 works, and current qemu master has a broken gdb server....I am going to fix
this first.
What I can tell, that the problem goes away if I disable virtio 1.0 so I assume
that things are fine when Andy sends a v4 with the endianess fixes.

Christian

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[PATCH v2 0/3] virtio DMA API core stuff Andy Lutomirski <luto@kernel.org> - 2015-10-28 06:40 +0100
  [PATCH v2 1/3] virtio_net: Stop doing DMA from the stack Andy Lutomirski <luto@kernel.org> - 2015-10-28 06:40 +0100
    Re: [PATCH v2 1/3] virtio_net: Stop doing DMA from the stack "Michael S. Tsirkin" <mst@redhat.com> - 2015-10-28 08:10 +0100
      Re: [PATCH v2 1/3] virtio_net: Stop doing DMA from the stack Andy Lutomirski <luto@amacapital.net> - 2015-10-30 00:50 +0100
  [PATCH v2 2/3] virtio_ring: Support DMA APIs Andy Lutomirski <luto@kernel.org> - 2015-10-28 06:40 +0100
    Re: [PATCH v2 2/3] virtio_ring: Support DMA APIs Christian Borntraeger <borntraeger@de.ibm.com> - 2015-10-28 07:00 +0100
      Re: [PATCH v2 2/3] virtio_ring: Support DMA APIs David Woodhouse <dwmw2@infradead.org> - 2015-10-28 07:10 +0100
        Re: [PATCH v2 2/3] virtio_ring: Support DMA APIs Christian Borntraeger <borntraeger@de.ibm.com> - 2015-10-28 09:50 +0100

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