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| author | David Woodhouse <David.Woodhouse@intel.com> | 2009-07-04 13:59:46 +0400 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2009-07-04 13:59:46 +0400 |
| commit | 62edf5dc4a524e4cb525e6020b955a1ad593d9ba (patch) | |
| tree | e811a942b7661fc9e97f1611ee75e7f125d51365 /arch | |
| parent | 40e4aa34324bff3938a900014254f88943d05e15 (diff) | |
| download | linux-62edf5dc4a524e4cb525e6020b955a1ad593d9ba.tar.xz | |
intel-iommu: Restore DMAR_BROKEN_GFX_WA option for broken graphics drivers
We need to give people a little more time to fix the broken drivers.
Re-introduce this, but tied in properly with the 'iommu=pt' support this
time. Change the config option name and make it default to 'no' too.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/Kconfig | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index c07f72205909..738bdc6b0f8b 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 |