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author | Alex Williamson <alex.williamson@redhat.com> | 2013-02-18 17:11:13 (GMT) |
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committer | Alex Williamson <alex.williamson@redhat.com> | 2013-02-18 17:11:13 (GMT) |
commit | 84237a826b261de7ddd3d09ee53ee68cb4138937 (patch) | |
tree | ab0c6d1d07abd74e90db41521258615fc1eaa211 /include/uapi/linux | |
parent | 2dd1194833de133960f286903ce704cb10fa7eb0 (diff) | |
download | linux-fsl-qoriq-84237a826b261de7ddd3d09ee53ee68cb4138937.tar.xz |
vfio-pci: Add support for VGA region access
PCI defines display class VGA regions at I/O port address 0x3b0, 0x3c0
and MMIO address 0xa0000. As these are non-overlapping, we can ignore
the I/O port vs MMIO difference and expose them both in a single
region. We make use of the VGA arbiter around each access to
configure chipset access as necessary.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'include/uapi/linux')
-rw-r--r-- | include/uapi/linux/vfio.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index 4758d1b..4f41f30 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -303,6 +303,15 @@ enum { VFIO_PCI_BAR5_REGION_INDEX, VFIO_PCI_ROM_REGION_INDEX, VFIO_PCI_CONFIG_REGION_INDEX, + /* + * Expose VGA regions defined for PCI base class 03, subclass 00. + * This includes I/O port ranges 0x3b0 to 0x3bb and 0x3c0 to 0x3df + * as well as the MMIO range 0xa0000 to 0xbffff. Each implemented + * range is found at it's identity mapped offset from the region + * offset, for example 0x3b0 is region_info.offset + 0x3b0. Areas + * between described ranges are unimplemented. + */ + VFIO_PCI_VGA_REGION_INDEX, VFIO_PCI_NUM_REGIONS }; |