lkml.org 
[lkml]   [2013]   [Aug]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH RFC 1/8] arm: make SWIOTLB available
On Wed, 31 Jul 2013, Konrad Rzeszutek Wilk wrote:
> Stefano Stabellini <stefano.stabellini@eu.citrix.com> wrote:
> >Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
> >CC: will.deacon@arm.com
> >CC: linux@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.


\
 
 \ /
  Last update: 2013-08-02 14:21    [W:0.090 / U:5.192 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site