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TencentOS-kernel/drivers/vfio
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Matthew Rosato e360572f15 vfio iommu: Add dma available capability 
[ Upstream commit 7d6e1329652ed971d1b6e0e7bea66fba5044e271 ]

The following functional changes were needed for backport:
- vfio_iommu_type1_get_info doesn't exist, call
  vfio_iommu_dma_avail_build_caps from vfio_iommu_type1_ioctl.
- As further fallout from this, vfio_iommu_dma_avail_build_caps must
  acquire and release the iommu mutex lock.  To do so, the return value is
  stored in a local variable as in vfio_iommu_iova_build_caps.

Upstream commit description:
Commit 492855939bdb ("vfio/type1: Limit DMA mappings per container")
added the ability to limit the number of memory backed DMA mappings.
However on s390x, when lazy mapping is in use, we use a very large
number of concurrent mappings.  Let's provide the current allowable
number of DMA mappings to userspace via the IOMMU info chain so that
userspace can take appropriate mitigation.

Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2021-04-12 12:51:15 +08:00
..
mdev vfio/mdev: Fix reference count leak in add_mdev_supported_type 2021-03-16 16:30:27 +08:00
pci vfio/pci: Move dummy_resources_list init in vfio_pci_probe() 2021-03-16 16:43:49 +08:00
platform vfio: platform: fix reference leak in vfio_platform_open 2021-03-16 16:40:46 +08:00
Kconfig Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
Makefile Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
vfio.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
vfio_iommu_spapr_tce.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
vfio_iommu_type1.c vfio iommu: Add dma available capability 2021-04-12 12:51:15 +08:00
vfio_spapr_eeh.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
virqfd.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00