On Wed, 31 Jul 2013, Konrad Rzeszutek Wilk wrote: > Stefano Stabellini <stefano.stabell...@eu.citrix.com> wrote: > >Signed-off-by: Stefano Stabellini <stefano.stabell...@eu.citrix.com> > >CC: will.dea...@arm.com > >CC: li...@arm.linux.org.uk > >--- > > arch/arm/Kconfig | 7 +++++++ > > arch/arm/include/asm/dma-mapping.h | 24 ++++++++++++++++++++++++ > > 2 files changed, 31 insertions(+), 0 deletions(-) > > > >diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig > >index ba412e0..05125ab 100644 > >--- a/arch/arm/Kconfig > >+++ b/arch/arm/Kconfig > >@@ -1832,6 +1832,13 @@ config CC_STACKPROTECTOR > > neutralized via a kernel panic. > > This feature requires gcc version 4.2 or above. > > > >+config SWIOTLB > >+ def_bool y > >+ select NEED_SG_DMA_LENGTH > >+ > >+config IOMMU_HELPER > >+ def_bool SWIOTLB > >+ > > Could you explain the purpose of these two a bit more please?
SWIOTLB is not available on arm at the moment. We need to make it available, otherwise SWIOTLB_XEN won't be able to select it. Similarly, IOMMU_HELPER is another lib Kconfig symbol needed by SWIOTLB to compile. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
