Intel IOMMU: Iommu Gfx workaround

When we fix all the opensource gfx drivers to use the DMA api's, at that time
we can yank this config options out.

[[email protected]: Kconfig fixes]
Signed-off-by: Anil S Keshavamurthy <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Muli Ben-Yehuda <[email protected]>
Cc: "Siddha, Suresh B" <[email protected]>
Cc: Arjan van de Ven <[email protected]>
Cc: Ashok Raj <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Greg KH <[email protected]>
Signed-off-by: Jan Engelhardt <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Keshavamurthy, Anil S 2007-10-21 16:41:55 -07:00 • committed by Linus Torvalds
commit e820482cd2
5 changed files with 79 additions and 4 deletions

View file

@ -57,6 +57,11 @@ Graphics Problems?
If you encounter issues with graphics devices, you can try adding
option intel_iommu=igfx_off to turn off the integrated graphics engine.
If it happens to be a PCI device included in the INCLUDE_ALL Engine,
then try enabling CONFIG_DMAR_GFX_WA to setup a 1-1 map. We hear
graphics drivers may be in process of using DMA api's in the near
future and at that time this option can be yanked out.
Some exceptions to IOVA
-----------------------
Interrupt ranges are not address translated, (0xfee00000 - 0xfeefffff).