Merge tag 'vfio-v3.12-rc0' of git://github.com/awilliam/linux-vfio

Pull VFIO update from Alex Williamson:
 "VFIO updates include safer default file flags for VFIO device fds, an
  external user interface exported to allow other modules to hold
  references to VFIO groups, a fix to test for extended config space on
  PCIe and PCI-x, and new hot reset interfaces for PCI devices which
  allows the user to do PCI bus/slot resets when all of the devices
  affected by the reset are owned by the user.

  For this last feature, the PCI bus reset interface, I depend on
  changes already merged from Bjorn's PCI pull request.  I therefore
  merged my tree up to commit cb3e433, which I think was the correct
  action, but as Stephen Rothwell noted, I failed to provide a commit
  message indicating why the merge was required.  Sorry for that.
  Thanks, Alex"

* tag 'vfio-v3.12-rc0' of git://github.com/awilliam/linux-vfio:
  vfio: fix documentation
  vfio-pci: PCI hot reset interface
  vfio-pci: Test for extended config space
  vfio-pci: Use fdget() rather than eventfd_fget()
  vfio: Add O_CLOEXEC flag to vfio device fd
  vfio: use get_unused_fd_flags(0) instead of get_unused_fd()
  vfio: add external user support

1 files changed, 38 insertions, 0 deletions

diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index 916e444e6f74..0fd47f5bc146 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -324,6 +324,44 @@ enum {
         VFIO_PCI_NUM_IRQS
 };
 
+/**
+ * VFIO_DEVICE_GET_PCI_HOT_RESET_INFO - _IORW(VFIO_TYPE, VFIO_BASE + 12,
+ *                                            struct vfio_pci_hot_reset_info)
+ *
+ * Return: 0 on success, -errno on failure:
+ *      -enospc = insufficient buffer, -enodev = unsupported for device.
+ */
+struct vfio_pci_dependent_device {
+        __u32   group_id;
+        __u16   segment;
+        __u8    bus;
+        __u8    devfn; /* Use PCI_SLOT/PCI_FUNC */
+};
+
+struct vfio_pci_hot_reset_info {
+        __u32   argsz;
+        __u32   flags;
+        __u32   count;
+        struct vfio_pci_dependent_device        devices[];
+};
+
+#define VFIO_DEVICE_GET_PCI_HOT_RESET_INFO      _IO(VFIO_TYPE, VFIO_BASE + 12)
+
+/**
+ * VFIO_DEVICE_PCI_HOT_RESET - _IOW(VFIO_TYPE, VFIO_BASE + 13,
+ *                                  struct vfio_pci_hot_reset)
+ *
+ * Return: 0 on success, -errno on failure.
+ */
+struct vfio_pci_hot_reset {
+        __u32   argsz;
+        __u32   flags;
+        __u32   count;
+        __s32   group_fds[];
+};
+
+#define VFIO_DEVICE_PCI_HOT_RESET       _IO(VFIO_TYPE, VFIO_BASE + 13)
+
 /* -------- API for Type1 VFIO IOMMU -------- */
 
 /**