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Merge tag 'vfio-v4.20-rc1.v2' of git://github.com/awilliam/linux-vfio

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Pull VFIO updates from Alex Williamson:

 - EDID interfaces for vfio devices supporting display extensions (Gerd
   Hoffmann)

 - Generically select Type-1 IOMMU model support on ARM/ARM64 (Geert
   Uytterhoeven)

 - Quirk for VFs reporting INTx pin (Alex Williamson)

 - Fix error path memory leak in MSI support (Li Qiang)

* tag 'vfio-v4.20-rc1.v2' of git://github.com/awilliam/linux-vfio:
  vfio: add edid support to mbochs sample driver
  vfio: add edid api for display (vgpu) devices.
  drivers/vfio: Allow type-1 IOMMU instantiation with all ARM/ARM64 IOMMUs
  vfio/pci: Mask buggy SR-IOV VF INTx support
  vfio/pci: Fix potential memory leak in vfio_msi_cap_len
This commit is contained in:
Linus Torvalds
2018-10-31 11:01:38 -07:00
parent b3491d8430 104c7405a6
commit 0c86e761b9
5 changed files with 205 additions and 24 deletions
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50
include/uapi/linux/vfio.h
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@@ -303,6 +303,56 @@ struct vfio_region_info_cap_type {
#define VFIO_REGION_SUBTYPE_INTEL_IGD_HOST_CFG (2)
#define VFIO_REGION_SUBTYPE_INTEL_IGD_LPC_CFG (3)
#define VFIO_REGION_TYPE_GFX (1)
#define VFIO_REGION_SUBTYPE_GFX_EDID (1)
/**
* struct vfio_region_gfx_edid - EDID region layout.
*
* Set display link state and EDID blob.
*
* The EDID blob has monitor information such as brand, name, serial
* number, physical size, supported video modes and more.
*
* This special region allows userspace (typically qemu) set a virtual
* EDID for the virtual monitor, which allows a flexible display
* configuration.
*
* For the edid blob spec look here:
* https://en.wikipedia.org/wiki/Extended_Display_Identification_Data
*
* On linux systems you can find the EDID blob in sysfs:
* /sys/class/drm/${card}/${connector}/edid
*
* You can use the edid-decode ulility (comes with xorg-x11-utils) to
* decode the EDID blob.
*
* @edid_offset: location of the edid blob, relative to the
* start of the region (readonly).
* @edid_max_size: max size of the edid blob (readonly).
* @edid_size: actual edid size (read/write).
* @link_state: display link state (read/write).
* VFIO_DEVICE_GFX_LINK_STATE_UP: Monitor is turned on.
* VFIO_DEVICE_GFX_LINK_STATE_DOWN: Monitor is turned off.
* @max_xres: max display width (0 == no limitation, readonly).
* @max_yres: max display height (0 == no limitation, readonly).
*
* EDID update protocol:
* (1) set link-state to down.
* (2) update edid blob and size.
* (3) set link-state to up.
*/
struct vfio_region_gfx_edid {
__u32 edid_offset;
__u32 edid_max_size;
__u32 edid_size;
__u32 max_xres;
__u32 max_yres;
__u32 link_state;
#define VFIO_DEVICE_GFX_LINK_STATE_UP 1
#define VFIO_DEVICE_GFX_LINK_STATE_DOWN 2
};
/*
* 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