Re: [Xen-devel] [PATCH v4 1/2] AMD IOMMU: Removing currently non-functioning guest iommu feature

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Thu, Jun 02, 2016 at 03:55:41AM -0600, Jan Beulich wrote:
> >>> On 01.06.16 at 21:52, <suravee.suthikulpanit@xxxxxxx> wrote:
> > From: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx>
> > 
> > The guest IOMMU feature is currently not functioning. However,
> > the current guest_iommu_init() is causing issue when it tries to
> > register mmio handler because the it is currently called by the
> > following code path:
> > 
> >   arch/x86/domain.c: arch_domain_create()
> >     ]- drivers/passthrough/iommu.c: iommu_domain_init()
> >       |- drivers/passthrough/amd/pci_amd_iommu.c: amd_iommu_domain_init();
> >         |- drivers/passthrough/amd/iommu_guest.c: guest_iommu_init()
> > 
> > At this point, the hvm_domain_initialised() has not been called.
> > So register_mmio_handler() in guest_iommu_init() silently fails.
> > 
> > This patch removes the guest IOMMU feature for now until we can properly
> > support it.
> > 
> > Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@xxxxxxx>
> 
> Thanks, quite reasonable. And imo actually a 4.7 candidate. Wei?
> 

Release-acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>

Please apply this series within this week.

> Jan
> 

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