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authorDavid Woodhouse <David.Woodhouse@intel.com>2009-06-26 19:10:36 +0100
committerDavid Woodhouse <David.Woodhouse@intel.com>2009-06-29 12:37:44 +0100
commitc7ab48d2acaf959e4d59c3f55d12fdb7ca9afd7c (patch)
tree5474dadf86c95ddf3b347000f5c114f154e7a0ab /arch/x86
parentb213203e475212a69ad6fedfb73464087e317148 (diff)
intel-iommu: Clean up identity mapping code, remove CONFIG_DMAR_GFX_WA
There's no need for the GFX workaround now we have 'iommu=pt' for the cases where people really care about performance. There's no need to have a special case for just one type of device. This also speeds up the iommu=pt path and reduces memory usage by setting up the si_domain _once_ and then using it for all devices, rather than giving each device its own private page tables. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/Kconfig15
1 files changed, 2 insertions, 13 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index d1430ef6b4f..c07f7220590 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1913,25 +1913,14 @@ config DMAR_DEFAULT_ON
recommended you say N here while the DMAR code remains
experimental.
-config DMAR_GFX_WA
- def_bool y
- prompt "Support for Graphics workaround"
- 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.
-
config DMAR_FLOPPY_WA
def_bool y
depends on DMAR
---help---
- Floppy disk drivers are know to bypass DMA API calls
+ Floppy disk drivers are known to bypass DMA API calls
thereby failing to work when IOMMU is enabled. This
workaround will setup a 1:1 mapping for the first
- 16M to make floppy (an ISA device) work.
+ 16MiB to make floppy (an ISA device) work.
config INTR_REMAP
bool "Support for Interrupt Remapping (EXPERIMENTAL)"