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-rw-r--r--arch/x86/Kconfig12
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index c07f7220590..738bdc6b0f8 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1913,6 +1913,18 @@ config DMAR_DEFAULT_ON
recommended you say N here while the DMAR code remains
experimental.
+config DMAR_BROKEN_GFX_WA
+ def_bool n
+ prompt "Workaround broken graphics drivers (going away soon)"
+ depends on DMAR
+ ---help---
+ Current Graphics drivers tend to use physical address
+ for DMA and avoid using DMA APIs. Setting this config
+ option permits the IOMMU driver to set a unity map for
+ all the OS-visible memory. Hence the driver can continue
+ to use physical addresses for DMA, at least until this
+ option is removed in the 2.6.32 kernel.
+
config DMAR_FLOPPY_WA
def_bool y
depends on DMAR