[Top][All Lists]

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

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.


reply via email to

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