Commit d0cb5f71 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'vfio-v3.15-rc1' of git://github.com/awilliam/linux-vfio 

Pull VFIO updates from Alex Williamson:
 "VFIO updates for v3.15 include:

   - Allow the vfio-type1 IOMMU to support multiple domains within a
     container
   - Plumb path to query whether all domains are cache-coherent
   - Wire query into kvm-vfio device to avoid KVM x86 WBINVD emulation
   - Always select CONFIG_ANON_INODES, vfio depends on it (Arnd)

  The first patch also makes the vfio-type1 IOMMU driver completely
  independent of the bus_type of the devices it's handling, which
  enables it to be used for both vfio-pci and a future vfio-platform
  (and hopefully combinations involving both simultaneously)"

* tag 'vfio-v3.15-rc1' of git://github.com/awilliam/linux-vfio:
  vfio: always select ANON_INODES
  kvm/vfio: Support for DMA coherent IOMMUs
  vfio: Add external user check extension interface
  vfio/type1: Add extension to test DMA cache coherence of IOMMU
  vfio/iommu_type1: Multi-IOMMU domain support
parents a372c967 4379d2ae

drivers/vfio/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ menuconfig VFIO 
	depends on IOMMU_API

	select VFIO_IOMMU_TYPE1 if X86

	select VFIO_IOMMU_SPAPR_TCE if (PPC_POWERNV || PPC_PSERIES)

	select ANON_INODES

	help

	  VFIO provides a framework for secure userspace device drivers.

	  See Documentation/vfio.txt for more details.

drivers/vfio/vfio.c

+6 −0
Original line number Diff line number Diff line
@@ -1413,6 +1413,12 @@ int vfio_external_user_iommu_id(struct vfio_group *group) 
}

EXPORT_SYMBOL_GPL(vfio_external_user_iommu_id);



long vfio_external_check_extension(struct vfio_group *group, unsigned long arg)

{

	return vfio_ioctl_check_extension(group->container, arg);

}

EXPORT_SYMBOL_GPL(vfio_external_check_extension);



/**

 * Module/class support

 */

drivers/vfio/vfio_iommu_type1.c

+355 −301

File changed.

Preview size limit exceeded, changes collapsed.

include/linux/vfio.h

+2 −0
Original line number Diff line number Diff line
@@ -96,5 +96,7 @@ extern void vfio_unregister_iommu_driver( 
extern struct vfio_group *vfio_group_get_external_user(struct file *filep);

extern void vfio_group_put_external_user(struct vfio_group *group);

extern int vfio_external_user_iommu_id(struct vfio_group *group);

extern long vfio_external_check_extension(struct vfio_group *group,

					  unsigned long arg);



#endif /* VFIO_H */

include/uapi/linux/vfio.h

+6 −0
Original line number Diff line number Diff line
@@ -23,6 +23,12 @@ 


#define VFIO_TYPE1_IOMMU		1

#define VFIO_SPAPR_TCE_IOMMU		2

#define VFIO_TYPE1v2_IOMMU		3

/*

 * IOMMU enforces DMA cache coherence (ex. PCIe NoSnoop stripping).  This

 * capability is subject to change as groups are added or removed.

 */

#define VFIO_DMA_CC_IOMMU		4



/*

 * The IOCTL interface is designed for extensibility by embedding the

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