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x86: default to SWIOTLB=y on x86_64 

Impact: fixes korg bugzilla 11980

A kernel for a 64bit x86 system should always contain the swiotlb code
in case it is booted on a machine without any hardware IOMMU supported
by the kernel and more than 4GB of RAM. This patch changes Kconfig to
always compile swiotlb into the kernel for x86_64.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: stable@kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Joerg Roedel 2008-11-18 12:44:21 +01:00 committed by Ingo Molnar
parent 4e14e833ac
commit a1afd01c17
1 changed files with 1 additions and 1 deletions
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arch/x86/Kconfig
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@ -566,7 +566,7 @@ config AMD_IOMMU
# need this always selected by IOMMU for the VIA workaround
config SWIOTLB
bool
def_bool y if X86_64
help
Support for software bounce buffers used on x86-64 systems
which don't have a hardware IOMMU (e.g. the current generation