linux_old1/drivers/vfio
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
..
mdev vfio/mdev: Use a module softdep for vfio_mdev 2017-02-08 13:13:25 -07:00
pci vfio-pci: Handle error from pci_iomap 2017-01-04 08:34:39 -07:00
platform vfio_platform: Updated to use vfio_set_irqs_validate_and_prepare() 2016-11-17 08:33:20 -07:00
Kconfig vfio: Fix build break when SPAPR_TCE_IOMMU=n 2017-02-08 13:13:25 -07:00
Makefile vfio: Mediated device Core driver 2016-11-17 08:24:48 -07:00
vfio.c vfio: fix a typo in comment of function vfio_pin_pages 2017-02-22 11:40:15 -07:00
vfio_iommu_spapr_tce.c powerpc/vfio_spapr_tce: Add reference counting to iommu_table 2017-03-30 21:42:11 +11:00
vfio_iommu_type1.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> 2017-03-02 08:42:29 +01:00
vfio_spapr_eeh.c drivers/vfio: Support EEH error injection 2015-05-12 20:33:35 +10:00
virqfd.c vfio: Split virqfd into a separate module for vfio bus drivers 2015-03-17 08:33:38 -06:00