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| Started by | Manjeet Pawar <manjeet.p@samsung.com> |
|---|---|
| First post | 2016-06-23 14:30 +0200 |
| Last post | 2016-06-23 18:10 +0200 |
| Articles | 2 — 2 participants |
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[PATCH] arm:swiotlb:keep disabled in default configuration Manjeet Pawar <manjeet.p@samsung.com> - 2016-06-23 14:30 +0200
Re: [PATCH] arm:swiotlb:keep disabled in default configuration Stefano Stabellini <sstabellini@kernel.org> - 2016-06-23 18:10 +0200
| From | Manjeet Pawar <manjeet.p@samsung.com> |
|---|---|
| Date | 2016-06-23 14:30 +0200 |
| Subject | [PATCH] arm:swiotlb:keep disabled in default configuration |
| Message-ID | <rNbVE-1sW-15@gated-at.bofh.it> |
From: Rohit Thapliyal <r.thapliyal@samsung.com> swiotlb implementation not required to be enabled in arm and disabling it reduces uImage size by 16KB. Signed-off-by: Rohit Thapliyal <r.thapliyal@samsung.com> Signed-off-by: Ajeet Kumar Yadav <ajeet.y@samsung.com> --- arch/arm/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 90542db..ae65f29 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1754,7 +1754,7 @@ config SECCOMP defined by each seccomp mode. config SWIOTLB - def_bool y + def_bool n config IOMMU_HELPER def_bool SWIOTLB -- 1.7.9.5
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| From | Stefano Stabellini <sstabellini@kernel.org> |
|---|---|
| Date | 2016-06-23 18:10 +0200 |
| Message-ID | <rNfmy-41u-7@gated-at.bofh.it> |
| In reply to | #1429759 |
On Thu, 23 Jun 2016, Stefano Stabellini wrote: > On Jun 23, 2016 8:27 AM, "Manjeet Pawar" <manjeet.p@samsung.com> wrote: > > > > From: Rohit Thapliyal <r.thapliyal@samsung.com> > > > > swiotlb implementation not required to be enabled in arm and > > disabling it reduces uImage size by 16KB. > > > > How so? There are no DMA operations on ARM? Xen actively uses the swiotlb on ARM, see arch/arm64/include/asm/dma-mapping.h:get_dma_ops arch/arm/xen/mm.c:xen_swiotlb_dma_ops > > Signed-off-by: Rohit Thapliyal <r.thapliyal@samsung.com> > > Signed-off-by: Ajeet Kumar Yadav <ajeet.y@samsung.com> > > --- > > arch/arm/Kconfig | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig > > index 90542db..ae65f29 100644 > > --- a/arch/arm/Kconfig > > +++ b/arch/arm/Kconfig > > @@ -1754,7 +1754,7 @@ config SECCOMP > > defined by each seccomp mode. > > > > config SWIOTLB > > - def_bool y > > + def_bool n > > > > config IOMMU_HELPER > > def_bool SWIOTLB > > -- > > 1.7.9.5 > > >
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