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Re: [Qemu-devel] [PATCH qemu v14 12/18] vfio: Check that IOMMU MR transl
From: |
David Gibson |
Subject: |
Re: [Qemu-devel] [PATCH qemu v14 12/18] vfio: Check that IOMMU MR translates to system address space |
Date: |
Wed, 23 Mar 2016 11:43:24 +1100 |
User-agent: |
Mutt/1.5.24 (2015-08-30) |
On Tue, Mar 22, 2016 at 09:47:10AM -0600, Alex Williamson wrote:
> On Tue, 22 Mar 2016 14:05:15 +1100
> David Gibson <address@hidden> wrote:
>
> > On Mon, Mar 21, 2016 at 06:47:00PM +1100, Alexey Kardashevskiy wrote:
> > > At the moment IOMMU MR only translate to the system memory.
> > > However if some new code changes this, we will need clear indication why
> > > it is not working so here is the check.
> > >
> > > Signed-off-by: Alexey Kardashevskiy <address@hidden>
> >
> > Reviewed-by: David Gibson <address@hidden>
> >
> > Alex, any chance we could merge this quickly, since it is a reasonable
> > sanity check even without the rest of the changes.
>
> It all sounds very theoretical to inspire some rush to merge it
> quickly, is there any chance we could actually hit this currently?
Hm, I guess not. Ok, let's leave it for now.
>
> > > ---
> > > Changes:
> > > v14:
> > > * new to the series
> > > ---
> > > hw/vfio/common.c | 6 ++++++
> > > 1 file changed, 6 insertions(+)
> > >
> > > diff --git a/hw/vfio/common.c b/hw/vfio/common.c
> > > index 55723c9..9587c25 100644
> > > --- a/hw/vfio/common.c
> > > +++ b/hw/vfio/common.c
> > > @@ -266,6 +266,12 @@ static void vfio_iommu_map_notify(Notifier *n, void
> > > *data)
> > >
> > > trace_vfio_iommu_map_notify(iova, iova + iotlb->addr_mask);
> > >
> > > + if (iotlb->target_as != &address_space_memory) {
> > > + error_report("Wrong target AS \"%s\", only system memory is
> > > allowed",
> > > +
> > > iotlb->target_as->name?iotlb->target_as->name:"noname");
>
> Spaces please.
>
> > > + return;
> > > + }
> > > +
> > > /*
> > > * The IOMMU TLB entry we have just covers translation through
> > > * this IOMMU to its immediate target. We need to translate
> >
>
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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- Re: [Qemu-devel] [PATCH qemu v14 01/18] memory: Fix IOMMU replay base address, (continued)
[Qemu-devel] [PATCH qemu v14 12/18] vfio: Check that IOMMU MR translates to system address space, Alexey Kardashevskiy, 2016/03/21