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VFIO updates for v4.17-rc1

Browse source 
- Adopt iommu_unmap_fast() interface to type1 backend
    (Suravee Suthikulpanit)
 
  - mdev sample driver fixup (Shunyong Yang)
 
  - More efficient PFN mapping handling in type1 backend
    (Jason Cai)
 
  - VFIO device ioeventfd interface (Alex Williamson)
 
  - Tag new vfio-platform sub-maintainer (Alex Williamson)
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Merge tag 'vfio-v4.17-rc1' of git://github.com/awilliam/linux-vfio

Pull VFIO updates from Alex Williamson:

 - Adopt iommu_unmap_fast() interface to type1 backend
   (Suravee Suthikulpanit)

 - mdev sample driver fixup (Shunyong Yang)

 - More efficient PFN mapping handling in type1 backend
   (Jason Cai)

 - VFIO device ioeventfd interface (Alex Williamson)

 - Tag new vfio-platform sub-maintainer (Alex Williamson)

* tag 'vfio-v4.17-rc1' of git://github.com/awilliam/linux-vfio:
  MAINTAINERS: vfio/platform: Update sub-maintainer
  vfio/pci: Add ioeventfd support
  vfio/pci: Use endian neutral helpers
  vfio/pci: Pull BAR mapping setup from read-write path
  vfio/type1: Improve memory pinning process for raw PFN mapping
  vfio-mdev/samples: change RDI interrupt condition
  vfio/type1: Adopt fast IOTLB flush interface when unmap IOVAs
This commit is contained in:
Linus Torvalds 2018-04-06 19:44:27 -07:00
commit f605ba97fb
7 changed files with 377 additions and 43 deletions
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27
include/uapi/linux/vfio.h
View file

@ -575,6 +575,33 @@ struct vfio_device_gfx_plane_info {
#define VFIO_DEVICE_GET_GFX_DMABUF _IO(VFIO_TYPE, VFIO_BASE + 15)
/**
* VFIO_DEVICE_IOEVENTFD - _IOW(VFIO_TYPE, VFIO_BASE + 16,
* struct vfio_device_ioeventfd)
*
* Perform a write to the device at the specified device fd offset, with
* the specified data and width when the provided eventfd is triggered.
* vfio bus drivers may not support this for all regions, for all widths,
* or at all. vfio-pci currently only enables support for BAR regions,
* excluding the MSI-X vector table.
*
* Return: 0 on success, -errno on failure.
*/
struct vfio_device_ioeventfd {
__u32 argsz;
__u32 flags;
#define VFIO_DEVICE_IOEVENTFD_8 (1 << 0) /* 1-byte write */
#define VFIO_DEVICE_IOEVENTFD_16 (1 << 1) /* 2-byte write */
#define VFIO_DEVICE_IOEVENTFD_32 (1 << 2) /* 4-byte write */
#define VFIO_DEVICE_IOEVENTFD_64 (1 << 3) /* 8-byte write */
#define VFIO_DEVICE_IOEVENTFD_SIZE_MASK (0xf)
__u64 offset; /* device fd offset of write */
__u64 data; /* data to be written */
__s32 fd; /* -1 for de-assignment */
};
#define VFIO_DEVICE_IOEVENTFD _IO(VFIO_TYPE, VFIO_BASE + 16)
/* -------- API for Type1 VFIO IOMMU -------- */
/**