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authorLinus Torvalds <torvalds@linux-foundation.org>2018-02-01 13:18:25 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2018-02-01 13:18:25 -0800
commit34b1cf60abb06fa79d5f8e56f1def843dbf91888 (patch)
tree2b6145709fa3c5900957cc0f625fad85f9378c7b /include/uapi/linux
parent27529c891b132f4fc65711334e885f466138ea2a (diff)
parent46ed90f157f42d956ffed17c003f089a59b76e3e (diff)
Merge tag 'vfio-v4.16-rc1' of git://github.com/awilliam/linux-vfio
Pull VFIO updates from Alex Williamson: - Mask INTx from user if pdev->irq is zero (Alexey Kardashevskiy) - Capability helper cleanup (Alex Williamson) - Allow mmaps overlapping MSI-X vector table with region capability exposing this feature (Alexey Kardashevskiy) - mdev static cleanups (Xiongwei Song) * tag 'vfio-v4.16-rc1' of git://github.com/awilliam/linux-vfio: vfio: mdev: make a couple of functions and structure vfio_mdev_driver static vfio-pci: Allow mapping MSIX BAR vfio: Simplify capability helper vfio-pci: Mask INTx if a device is not capabable of enabling it
Diffstat (limited to 'include/uapi/linux')
-rw-r--r--include/uapi/linux/vfio.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
index e3301dbd27d4..0d914350f7bf 100644
--- a/include/uapi/linux/vfio.h
+++ b/include/uapi/linux/vfio.h
@@ -301,6 +301,16 @@ struct vfio_region_info_cap_type {
#define VFIO_REGION_SUBTYPE_INTEL_IGD_HOST_CFG (2)
#define VFIO_REGION_SUBTYPE_INTEL_IGD_LPC_CFG (3)
+/*
+ * The MSIX mappable capability informs that MSIX data of a BAR can be mmapped
+ * which allows direct access to non-MSIX registers which happened to be within
+ * the same system page.
+ *
+ * Even though the userspace gets direct access to the MSIX data, the existing
+ * VFIO_DEVICE_SET_IRQS interface must still be used for MSIX configuration.
+ */
+#define VFIO_REGION_INFO_CAP_MSIX_MAPPABLE 3
+
/**
* VFIO_DEVICE_GET_IRQ_INFO - _IOWR(VFIO_TYPE, VFIO_BASE + 9,
* struct vfio_irq_info)

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