Re: [PATCH v2] intel-iommu: Report interrupt remapping faults, fix return value

[David Woodhouse <dwmw2@infradead.org>]

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On Wed, 2023-08-23 at 11:37 -0400, Peter Xu wrote:
> On Wed, Aug 23, 2023 at 01:23:25PM +0100, David Woodhouse wrote:
> > From: David Woodhouse <dwmw@amazon.co.uk>
> > 
> > A generic X86IOMMUClass->int_remap function should not return VT-d
> > specific values; fix it to return 0 if the interrupt was successfully
> > translated or -EINVAL if not.
> > 
> > The VTD_FR_IR_xxx values are supposed to be used to actually raise
> > faults through the fault reporting mechanism, so do that instead for
> > the case where the IRQ is actually being injected.
> > 
> > There is more work to be done here, as pretranslations for the KVM IRQ
> > routing table can't fault; an untranslatable IRQ should be handled in
> > userspace and the fault raised only when the IRQ actually happens (if
> > indeed the IRTE is still not valid at that time). But we can work on
> > that later; we can at least raise faults for the direct case.
> > 
> > Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
> 
> Acked-by: Peter Xu <peterx@redhat.com>

Thanks.

What do I do with this next? It's still lurking in my working tree.



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