From: Randy Dunlap <rdunlap@infradead.org>
To: Christoph Hellwig <hch@lst.de>, iommu@lists.linux-foundation.org
Cc: linux-mips@linux-mips.org, linux-ia64@vger.kernel.org,
linux-sh@vger.kernel.org, sparclinux@vger.kernel.org,
Guan Xuetao <gxt@mprc.pku.edu.cn>,
linux-arch@vger.kernel.org, linux-s390@vger.kernel.org,
linux-c6x-dev@linux-c6x.org, linux-hexagon@vger.kernel.org,
x86@kernel.org, Konrad Rzeszutek Wilk <konrad@darnok.org>,
linux-snps-arc@lists.infradead.org,
linux-m68k@lists.linux-m68k.org, patches@groups.riscv.org,
linux-metag@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Michal Simek <monstr@monstr.eu>,
linux-parisc@vger.kernel.org, linux-cris-kernel@axis.com,
linux-kernel@vger.kernel.org, linux-alpha@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH 22/34] dma-mapping: add an arch_dma_supported hook
Date: Fri, 2 Feb 2018 09:47:23 -0800 [thread overview]
Message-ID: <5d7dfb29-eeef-2280-13c9-5260e9104f67@infradead.org> (raw)
In-Reply-To: <20180112084232.2857-23-hch@lst.de>
On 01/12/2018 12:42 AM, Christoph Hellwig wrote:
> To implement the x86 forbid_dac and iommu_sac_force we want an arch hook
> so that it can apply the global options across all dma_map_ops
> implementations.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
> arch/x86/include/asm/dma-mapping.h | 3 +++
> arch/x86/kernel/pci-dma.c | 19 ++++++++++++-------
> include/linux/dma-mapping.h | 11 +++++++++++
> 3 files changed, 26 insertions(+), 7 deletions(-)
> diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
> index 88bcb1a8211d..d67742dad904 100644
> --- a/include/linux/dma-mapping.h
> +++ b/include/linux/dma-mapping.h
> @@ -576,6 +576,14 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
> return 0;
> }
>
> +/*
> + * This is a hack for the legacy x86 forbid_dac and iommu_sac_force. Please
> + * don't use this is new code.
in new code.
> + */
> +#ifndef arch_dma_supported
> +#define arch_dma_supported(dev, mask) (1)
> +#endif
--
~Randy
next prev parent reply other threads:[~2018-02-02 17:47 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-12 8:41 consolidate direct dma mapping V4 Christoph Hellwig
2018-01-12 8:41 ` [PATCH 01/34] alpha: mark jensen as broken Christoph Hellwig
[not found] ` <20180112084232.2857-1-hch-jcswGhMUV9g@public.gmane.org>
2018-01-12 8:42 ` [PATCH 02/34] hexagon: remove unused flush_write_buffers definition Christoph Hellwig
2018-01-12 8:42 ` [PATCH 03/34] m32r: " Christoph Hellwig
2018-01-12 8:42 ` [PATCH 04/34] powerpc: " Christoph Hellwig
2018-01-12 8:42 ` [PATCH 05/34] arc: remove CONFIG_ARC_PLAT_NEEDS_PHYS_TO_DMA Christoph Hellwig
2018-01-12 8:42 ` [PATCH 06/34] m32r: remove the unused dma_capable helper Christoph Hellwig
2018-01-12 8:42 ` [PATCH 07/34] riscv: " Christoph Hellwig
2018-01-12 8:42 ` [PATCH 08/34] s390: " Christoph Hellwig
2018-01-12 8:42 ` [PATCH 09/34] dma-mapping: take dma_pfn_offset into account in dma_max_pfn Christoph Hellwig
2018-01-12 8:42 ` [PATCH 13/34] dma-mapping: move dma_mark_clean to dma-direct.h Christoph Hellwig
2018-01-12 8:42 ` [PATCH 16/34] microblaze: rename dma_direct to dma_nommu Christoph Hellwig
2018-01-12 8:42 ` [PATCH 20/34] dma-mapping: warn when there is no coherent_dma_mask Christoph Hellwig
2018-01-12 8:42 ` [PATCH 22/34] dma-mapping: add an arch_dma_supported hook Christoph Hellwig
2018-02-02 17:47 ` Randy Dunlap [this message]
2018-01-12 8:42 ` [PATCH 23/34] dma-mapping: provide a generic asm/dma-mapping.h Christoph Hellwig
2018-01-12 8:42 ` [PATCH 25/34] dma-direct: use phys_to_dma Christoph Hellwig
2018-01-12 8:42 ` [PATCH 26/34] dma-direct: add dma address sanity checks Christoph Hellwig
2018-01-16 7:52 ` consolidate direct dma mapping V4 Christoph Hellwig
2018-01-12 8:42 ` [PATCH 10/34] arm64: don't override dma_max_pfn Christoph Hellwig
2018-01-12 8:42 ` [PATCH 11/34] mips: fix an off-by-one in dma_capable Christoph Hellwig
2018-01-12 8:42 ` [PATCH 12/34] dma-mapping: move swiotlb arch helpers to a new header Christoph Hellwig
2018-01-12 8:42 ` [PATCH 14/34] hexagon: use the generic dma_capable helper Christoph Hellwig
2018-01-12 8:42 ` [PATCH 15/34] powerpc: rename dma_direct_ to dma_nommu_ Christoph Hellwig
2018-01-12 8:42 ` [PATCH 17/34] microblaze: remove dma_nommu_dma_supported Christoph Hellwig
2018-01-12 8:42 ` [PATCH 18/34] microblaze: remove the dead !NOT_COHERENT_CACHE dma code Christoph Hellwig
2018-01-12 8:42 ` [PATCH 19/34] s390: move s390_pci_dma_ops to asm/pci_dma.h Christoph Hellwig
2018-01-12 8:42 ` [PATCH 21/34] dma-mapping: clear harmful GFP_* flags in common code Christoph Hellwig
2018-01-12 8:42 ` [PATCH 24/34] dma-direct: rename dma_noop to dma_direct Christoph Hellwig
2018-01-12 8:42 ` [PATCH 27/34] dma-direct: add support for CMA allocation Christoph Hellwig
2018-01-12 8:42 ` [PATCH 28/34] dma-direct: use node local allocations for coherent memory Christoph Hellwig
2018-01-12 8:42 ` [PATCH 29/34] dma-direct: add support for allocation from ZONE_DMA and ZONE_DMA32 Christoph Hellwig
2018-01-12 8:42 ` [PATCH 30/34] dma-direct: retry allocations using GFP_DMA for small masks Christoph Hellwig
2018-01-12 8:42 ` [PATCH 31/34] dma-direct: make dma_direct_{alloc,free} available to other implementations Christoph Hellwig
2018-01-12 8:42 ` [PATCH 32/34] dma-direct: reject too small dma masks Christoph Hellwig
2018-01-12 8:42 ` [PATCH 33/34] cris: use dma-direct Christoph Hellwig
2018-01-12 8:42 ` [PATCH 34/34] h8300: " Christoph Hellwig
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