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| author | Keshavamurthy, Anil S <anil.s.keshavamurthy@intel.com> | 2007-10-21 16:41:55 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-22 08:13:19 -0700 |
| commit | e820482cd2621dba60e403af1c54502daa54b220 (patch) | |
| tree | 3498401c7154e14008ab80b2f0cbca539ce7ffbc /Documentation | |
| parent | 3460a6d9cef9ac2aa997da7eff7ff1c8291b361c (diff) | |
| download | linux-3.10-e820482cd2621dba60e403af1c54502daa54b220.tar.gz linux-3.10-e820482cd2621dba60e403af1c54502daa54b220.tar.bz2 linux-3.10-e820482cd2621dba60e403af1c54502daa54b220.zip | |
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.
[jengelh@computergmbh.de: Kconfig fixes]
Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Muli Ben-Yehuda <muli@il.ibm.com>
Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/Intel-IOMMU.txt | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/Intel-IOMMU.txt b/Documentation/Intel-IOMMU.txt index aba7722c293..c2321903aa0 100644 --- a/Documentation/Intel-IOMMU.txt +++ b/Documentation/Intel-IOMMU.txt @@ -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). |