Re: [Qemu-devel] RFC: vfio API changes needed for powerpc (v3)

[Scott Wood]

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?

-Scott