> -----Original Message-----
> From: Wood Scott-B07421
> Sent: Friday, April 05, 2013 5:17 PM
> To: Yoder Stuart-B08248
> Cc: Alex Williamson; Wood Scott-B07421; agraf@xxxxxxx; Bhushan Bharat-R65777; Sethi Varun-B16395;
> kvm@xxxxxxxxxxxxxxx; qemu-devel@xxxxxxxxxx; iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx
> Subject: Re: RFC: vfio API changes needed for powerpc (v3)
>
> On 04/04/2013 05:10:27 PM, Yoder Stuart-B08248 wrote:
> > /*
> > * VFIO_IOMMU_PAMU_UNMAP_MSI_BANK
> > *
> > * Unmaps the MSI bank at the specified iova.
> > * Caller provides struct vfio_pamu_msi_bank_unmap with all fields
> > set.
> > * Operates on VFIO file descriptor (/dev/vfio/vfio).
> > * Return: 0 on success, -errno on failure
> > */
> >
> > struct vfio_pamu_msi_bank_unmap {
> > __u32 argsz;
> > __u32 flags; /* no flags currently */
> > __u64 iova; /* the iova to be unmapped to */
> > };
> > #define VFIO_IOMMU_PAMU_UNMAP_MSI_BANK _IO(VFIO_TYPE, VFIO_BASE + x,
> > struct vfio_pamu_msi_bank_unmap )
>
> What happens if a normal unmap call is done on the MSI iova? Do we
> need a separate unmap?
I was thinking a normal unmap on an MSI windows would be an error...but
I'm not set on that. I put the msi unmap there to make things symmetric,
a normal unmap would work as well...and then we could drop the msi unmap.
Stuart
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