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