Alexey Kardashevskiy e5afdf9dd5 powerpc/vfio_spapr_tce: Add reference counting to iommu_table ... So far iommu_table obejcts were only used in virtual mode and had a single owner. We are going to change this by implementing in-kernel acceleration of DMA mapping requests. The proposed acceleration will handle requests in real mode and KVM will keep references to tables. This adds a kref to iommu_table and defines new helpers to update it. This replaces iommu_free_table() with iommu_tce_table_put() and makes iommu_free_table() static. iommu_tce_table_get() is not used in this patch but it will be in the following patch. Since this touches prototypes, this also removes @node_name parameter as it has never been really useful on powernv and carrying it for the pseries platform code to iommu_free_table() seems to be quite useless as well. This should cause no behavioral change. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Acked-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>		2017-03-30 21:42:11 +11:00
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asm	powerpc/vfio_spapr_tce: Add reference counting to iommu_table	2017-03-30 21:42:11 +11:00
uapi/asm	powerpc: Wire up statx() syscall	2017-03-16 20:45:53 +11:00