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Re: [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api
From: |
Andy Lutomirski |
Subject: |
Re: [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api |
Date: |
Mon, 18 Apr 2016 12:24:15 -0700 |
On Mon, Apr 18, 2016 at 11:29 AM, David Woodhouse <address@hidden> wrote:
> For x86, you *can* enable virtio-behind-IOMMU if your DMAR tables tell
> the truth, and even legacy kernels ought to cope with that.
> FSVO 'ought to' where I suspect some of them will actually crash with a
> NULL pointer dereference if there's no "catch-all" DMAR unit in the
> tables, which puts it back into the same camp as ARM and Power.
I think x86 may get a bit of a free pass here. AFAIK the QEMU IOMMU
implementation on x86 has always been "experimental", so it just might
be okay to change it in a way that causes some older kernels to OOPS.
--Andy
- [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api, Michael S. Tsirkin, 2016/04/18
- Re: [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api, David Woodhouse, 2016/04/18
- Re: [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api, Michael S. Tsirkin, 2016/04/18
- Re: [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api, David Woodhouse, 2016/04/18
- Re: [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api, Michael S. Tsirkin, 2016/04/18
- Re: [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api, David Woodhouse, 2016/04/18
- Re: [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api, Michael S. Tsirkin, 2016/04/18
- Re: [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api, David Woodhouse, 2016/04/18
- Re: [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api, Michael S. Tsirkin, 2016/04/18
- Re: [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api, David Woodhouse, 2016/04/18
- Re: [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api,
Andy Lutomirski <=
- Re: [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api, Michael S. Tsirkin, 2016/04/19
- Re: [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api, Andy Lutomirski, 2016/04/19
- Re: [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api, Michael S. Tsirkin, 2016/04/19
- Re: [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api, Andy Lutomirski, 2016/04/19
- Re: [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api, Michael S. Tsirkin, 2016/04/19
- Re: [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api, David Woodhouse, 2016/04/19
- Re: [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api, Michael S. Tsirkin, 2016/04/19
- Re: [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api, Andy Lutomirski, 2016/04/19
- Re: [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api, Michael S. Tsirkin, 2016/04/19
- Re: [Qemu-devel] [PATCH RFC] fixup! virtio: convert to use DMA api, Andy Lutomirski, 2016/04/19