diff options
| author |   Kyle McMartin <kyle@redhat.com> | 2009-02-04 14:29:19 -0800 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2009-02-05 16:48:38 +0100 |
| commit | 0cd5c3c80a0ebd68c08312fa7d8c13149cc61c4c (patch) | |
| tree | 4dc6093ee08e668a182b38bd13cd85436555c4b6 /arch | |
| parent | x86: don't apply __supported_pte_mask to non-present ptes (diff) | |
| download | linux-dev-0cd5c3c80a0ebd68c08312fa7d8c13149cc61c4c.tar.xz linux-dev-0cd5c3c80a0ebd68c08312fa7d8c13149cc61c4c.zip | |
x86: disable intel_iommu support by default
Due to recurring issues with DMAR support on certain platforms.
There's a number of filesystem corruption incidents reported:
https://bugzilla.redhat.com/show_bug.cgi?id=479996
http://bugzilla.kernel.org/show_bug.cgi?id=12578
Provide a Kconfig option to change whether it is enabled by
default.
If disabled, it can still be reenabled by passing intel_iommu=on to the
kernel. Keep the .config option off by default.
Signed-off-by: Kyle McMartin <kyle@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-By: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 73f7fe8fd4d1..9c39095b33fc 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1802,6 +1802,17 @@ config DMAR and include PCI device scope covered by these DMA remapping devices. +config DMAR_DEFAULT_ON + def_bool n + prompt "Enable DMA Remapping Devices by default" + depends on DMAR + help + Selecting this option will enable a DMAR device at boot time if + one is found. If this option is not selected, DMAR support can + be enabled by passing intel_iommu=on to the kernel. It is + recommended you say N here while the DMAR code remains + experimental. + config DMAR_GFX_WA def_bool y prompt "Support for Graphics workaround" |