From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
To: Christoph Hellwig <hch@lst.de>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
iommu@lists.linux-foundation.org
Cc: linux-mips@linux-mips.org, linux-mm@kvack.org,
linux-pci@vger.kernel.org, x86@kernel.org,
linux-block@vger.kernel.org, linux-ide@vger.kernel.org,
sparclinux@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 11/12] swiotlb: move the SWIOTLB config symbol to lib/Kconfig
Date: Tue, 17 Apr 2018 11:40:36 +0530 [thread overview]
Message-ID: <1c4007b5-c0d4-7077-b2c1-767c6abbf79f@linux.vnet.ibm.com> (raw)
In-Reply-To: <20180415145947.1248-12-hch@lst.de>
On 04/15/2018 08:29 PM, Christoph Hellwig wrote:
> This way we have one central definition of it, and user can select it as
> needed. Note that we also add a second ARCH_HAS_SWIOTLB symbol to
> indicate the architecture supports swiotlb at all, so that we can still
> make the usage optional for a few architectures that want this feature
> to be user selectable.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
snip
> +
> +config SWIOTLB
> + bool "SWIOTLB support"
> + default ARCH_HAS_SWIOTLB
> + select DMA_DIRECT_OPS
> + select NEED_DMA_MAP_STATE
> + select NEED_SG_DMA_LENGTH
> + ---help---
> + Support for IO bounce buffering for systems without an IOMMU.
> + This allows us to DMA to the full physical address space on
> + platforms where the size of a physical address is larger
> + than the bus address. If unsure, say Y.
> +
> config CHECK_SIGNATURE
> bool
Pulling DMA_DIRECT_OPS config option by default when SWIOTLB is enabled
makes sense. This option was also needed to be enabled separately even
to use swiotlb_dma_ops.
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next prev parent reply other threads:[~2018-04-17 6:10 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-15 14:59 centralize SWIOTLB config symbol and misc other cleanups Christoph Hellwig
2018-04-15 14:59 ` [PATCH 01/12] iommu-common: move to arch/sparc Christoph Hellwig
2018-04-16 8:56 ` Anshuman Khandual
2018-04-16 13:58 ` David Miller
2018-04-17 5:50 ` Anshuman Khandual
2018-04-17 12:53 ` Michael Ellerman
2018-04-17 19:55 ` Christoph Hellwig
2018-04-15 14:59 ` [PATCH 02/12] iommu-helper: unexport iommu_area_alloc Christoph Hellwig
2018-04-15 21:52 ` Sam Ravnborg
2018-04-16 9:06 ` Anshuman Khandual
2018-04-15 14:59 ` [PATCH 03/12] iommu-helper: mark iommu_is_span_boundary as inline Christoph Hellwig
2018-04-15 14:59 ` [PATCH 04/12] iommu-helper: move the IOMMU_HELPER config symbol to lib/ Christoph Hellwig
2018-04-16 9:43 ` Anshuman Khandual
2018-04-15 14:59 ` [PATCH 05/12] scatterlist: move the NEED_SG_DMA_LENGTH config symbol to lib/Kconfig Christoph Hellwig
2018-04-16 9:54 ` Anshuman Khandual
2018-04-15 14:59 ` [PATCH 06/12] dma-mapping: move the NEED_DMA_MAP_STATE " Christoph Hellwig
2018-04-16 9:57 ` Anshuman Khandual
2018-04-15 14:59 ` [PATCH 07/12] arch: remove the ARCH_PHYS_ADDR_T_64BIT config symbol Christoph Hellwig
2018-04-15 14:59 ` [PATCH 08/12] arch: define the ARCH_DMA_ADDR_T_64BIT config symbol in lib/Kconfig Christoph Hellwig
2018-04-15 14:59 ` [PATCH 09/12] PCI: remove CONFIG_PCI_BUS_ADDR_T_64BIT Christoph Hellwig
2018-04-20 18:42 ` Bjorn Helgaas
2018-04-15 14:59 ` [PATCH 10/12] arm: don't build swiotlb by default Christoph Hellwig
2018-04-15 14:59 ` [PATCH 11/12] swiotlb: move the SWIOTLB config symbol to lib/Kconfig Christoph Hellwig
2018-04-17 6:10 ` Anshuman Khandual [this message]
2018-04-15 14:59 ` [PATCH 12/12] swiotlb: remove the CONFIG_DMA_DIRECT_OPS ifdefs Christoph Hellwig
-- strict thread matches above, loose matches on Subject: below --
2018-04-23 17:04 centralize SWIOTLB config symbol and misc other cleanups V2 Christoph Hellwig
2018-04-23 17:04 ` [PATCH 11/12] swiotlb: move the SWIOTLB config symbol to lib/Kconfig Christoph Hellwig
2018-04-23 20:11 ` Konrad Rzeszutek Wilk
2018-04-23 23:52 ` Russell King - ARM Linux
2018-04-24 6:55 ` Christoph Hellwig
2018-04-24 7:47 ` Russell King - ARM Linux
2018-04-24 7:56 ` Christoph Hellwig
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