user/sven/linux.git/include/linux/vfio.h, branch v3.18.108

vfio: New external user group/file match

2017-07-27T22:03:27Z

commit 5d6dee80a1e94cc284d03e06d930e60e8d3ecf7d upstream. At the point where the kvm-vfio pseudo device wants to release its vfio group reference, we can't always acquire a new reference to make that happen. The group can be in a state where we wouldn't allow a new reference to be added. This new helper function allows a caller to match a file to a group to facilitate this. Given a file and group, report if they match. Thus the caller needs to already have a group reference to match to the file. This allows the deletion of a group without acquiring a new reference. Signed-off-by: Alex Williamson Reviewed-by: Eric Auger Reviewed-by: Paolo Bonzini Tested-by: Eric Auger Signed-off-by: Greg Kroah-Hartman

include/stddef.h: Move offsetofend() from vfio.h to a generic kernel header

2017-07-27T22:03:24Z

commit 3876488444e71238e287459c39d7692b6f718c3e upstream. Suggested by Andy. Suggested-by: Andy Lutomirski Signed-off-by: Denys Vlasenko Acked-by: Linus Torvalds Cc: Alexei Starovoitov Cc: Borislav Petkov Cc: Frederic Weisbecker Cc: H. Peter Anvin Cc: Kees Cook Cc: Oleg Nesterov Cc: Steven Rostedt Cc: Will Drewry Link: http://lkml.kernel.org/r/1425912738-559-1-git-send-email-dvlasenk@redhat.com Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman

drivers/vfio: Enable VFIO if EEH is not supported

2014-08-08T16:39:16Z

The existing vfio_pci_open() fails upon error returned from vfio_spapr_pci_eeh_open(), which breaks POWER7's P5IOC2 PHB support which this patch brings back. The patch fixes the issue by dropping the return value of vfio_spapr_pci_eeh_open(). Signed-off-by: Alexey Kardashevskiy Signed-off-by: Gavin Shan Signed-off-by: Alex Williamson

drivers/vfio: Fix EEH build error

2014-08-08T16:36:20Z

The VFIO related components could be built as dynamic modules. Unfortunately, CONFIG_EEH can't be configured to "m". The patch fixes the build errors when configuring VFIO related components as dynamic modules as follows: CC [M] drivers/vfio/vfio_iommu_spapr_tce.o In file included from drivers/vfio/vfio.c:33:0: include/linux/vfio.h:101:43: warning: ‘struct pci_dev’ declared \ inside parameter list [enabled by default] : WRAP arch/powerpc/boot/zImage.pseries WRAP arch/powerpc/boot/zImage.maple WRAP arch/powerpc/boot/zImage.pmac WRAP arch/powerpc/boot/zImage.epapr MODPOST 1818 modules ERROR: ".vfio_spapr_iommu_eeh_ioctl" [drivers/vfio/vfio_iommu_spapr_tce.ko]\ undefined! ERROR: ".vfio_spapr_pci_eeh_open" [drivers/vfio/pci/vfio-pci.ko] undefined! ERROR: ".vfio_spapr_pci_eeh_release" [drivers/vfio/pci/vfio-pci.ko] undefined! Reported-by: Alexey Kardashevskiy Signed-off-by: Gavin Shan Signed-off-by: Alexey Kardashevskiy Signed-off-by: Alex Williamson

drivers/vfio: EEH support for VFIO PCI device

2014-08-05T05:28:48Z

The patch adds new IOCTL commands for sPAPR VFIO container device to support EEH functionality for PCI devices, which have been passed through from host to somebody else via VFIO. Signed-off-by: Gavin Shan Acked-by: Alexander Graf Acked-by: Alex Williamson Signed-off-by: Benjamin Herrenschmidt

drivers/vfio: Rework offsetofend()

2014-05-30T17:35:54Z

The macro offsetofend() introduces unnecessary temporary variable "tmp". The patch avoids that and saves a bit memory in stack. Signed-off-by: Gavin Shan Signed-off-by: Alex Williamson

vfio: Add external user check extension interface

2014-02-26T18:38:39Z

This lets us check extensions, particularly VFIO_DMA_CC_IOMMU using the external user interface, allowing KVM to probe IOMMU coherency. Signed-off-by: Alex Williamson

vfio: add external user support

2013-08-05T16:52:36Z

VFIO is designed to be used via ioctls on file descriptors returned by VFIO. However in some situations support for an external user is required. The first user is KVM on PPC64 (SPAPR TCE protocol) which is going to use the existing VFIO groups for exclusive access in real/virtual mode on a host to avoid passing map/unmap requests to the user space which would made things pretty slow. The protocol includes: 1. do normal VFIO init operation: - opening a new container; - attaching group(s) to it; - setting an IOMMU driver for a container. When IOMMU is set for a container, all groups in it are considered ready to use by an external user. 2. User space passes a group fd to an external user. The external user calls vfio_group_get_external_user() to verify that: - the group is initialized; - IOMMU is set for it. If both checks passed, vfio_group_get_external_user() increments the container user counter to prevent the VFIO group from disposal before KVM exits. 3. The external user calls vfio_external_user_iommu_id() to know an IOMMU ID. PPC64 KVM uses it to link logical bus number (LIOBN) with IOMMU ID. 4. When the external KVM finishes, it calls vfio_group_put_external_user() to release the VFIO group. This call decrements the container user counter. Everything gets released. The "vfio: Limit group opens" patch is also required for the consistency. Signed-off-by: Alexey Kardashevskiy Signed-off-by: Alex Williamson

VFIO: Wrapper for getting reference to vfio_device

2013-03-11T15:28:44Z

- Added vfio_device_get_from_dev() as wrapper to get reference to vfio_device from struct device. - Added vfio_device_data() as a wrapper to get device_data from vfio_device. Signed-off-by: Vijay Mohan Pandarathil Signed-off-by: Alex Williamson

UAPI: (Scripted) Disintegrate include/linux

2012-10-13T09:46:48Z

Signed-off-by: David Howells Acked-by: Arnd Bergmann Acked-by: Thomas Gleixner Acked-by: Michael Kerrisk Acked-by: Paul E. McKenney Acked-by: Dave Jones