Merge tag 'vfio-v4.1-rc1' of git://github.com/awilliam/linux-vfio

Pull VFIO updates from Alex Williamson:

 - VFIO platform bus driver support (Baptiste Reynal, Antonios Motakis,
   testing and review by Eric Auger)

 - Split VFIO irqfd support to separate module (Alex Williamson)

 - vfio-pci VGA arbiter client (Alex Williamson)

 - New vfio-pci.ids= module option (Alex Williamson)

 - vfio-pci D3 power state support for idle devices (Alex Williamson)

* tag 'vfio-v4.1-rc1' of git://github.com/awilliam/linux-vfio: (30 commits)
  vfio-pci: Fix use after free
  vfio-pci: Move idle devices to D3hot power state
  vfio-pci: Remove warning if try-reset fails
  vfio-pci: Allow PCI IDs to be specified as module options
  vfio-pci: Add VGA arbiter client
  vfio-pci: Add module option to disable VGA region access
  vgaarb: Stub vga_set_legacy_decoding()
  vfio: Split virqfd into a separate module for vfio bus drivers
  vfio: virqfd_lock can be static
  vfio: put off the allocation of "minor" in vfio_create_group
  vfio/platform: implement IRQ masking/unmasking via an eventfd
  vfio: initialize the virqfd workqueue in VFIO generic code
  vfio: move eventfd support code for VFIO_PCI to a separate file
  vfio: pass an opaque pointer on virqfd initialization
  vfio: add local lock for virqfd instead of depending on VFIO PCI
  vfio: virqfd: rename vfio_pci_virqfd_init and vfio_pci_virqfd_exit
  vfio: add a vfio_ prefix to virqfd_enable and virqfd_disable and export
  vfio/platform: support for level sensitive interrupts
  vfio/platform: trigger an interrupt via eventfd
  vfio/platform: initial interrupts support code
  ...

1 files changed, 25 insertions, 0 deletions

diff --git a/include/linux/vfio.h b/include/linux/vfio.h
index 049b2f497bc7..ddb440975382 100644
--- a/include/linux/vfio.h
+++ b/include/linux/vfio.h
@@ -14,6 +14,8 @@
 
 #include <linux/iommu.h>
 #include <linux/mm.h>
+#include <linux/workqueue.h>
+#include <linux/poll.h>
 #include <uapi/linux/vfio.h>
 
 /**
@@ -110,4 +112,27 @@ static inline long vfio_spapr_iommu_eeh_ioctl(struct iommu_group *group,
         return -ENOTTY;
 }
 #endif /* CONFIG_EEH */
+
+/*
+ * IRQfd - generic
+ */
+struct virqfd {
+        void                    *opaque;
+        struct eventfd_ctx      *eventfd;
+        int                     (*handler)(void *, void *);
+        void                    (*thread)(void *, void *);
+        void                    *data;
+        struct work_struct      inject;
+        wait_queue_t            wait;
+        poll_table              pt;
+        struct work_struct      shutdown;
+        struct virqfd           **pvirqfd;
+};
+
+extern int vfio_virqfd_enable(void *opaque,
+                              int (*handler)(void *, void *),
+                              void (*thread)(void *, void *),
+                              void *data, struct virqfd **pvirqfd, int fd);
+extern void vfio_virqfd_disable(struct virqfd **pvirqfd);
+
 #endif /* VFIO_H */