From: Julien Grall <julien.grall@arm.com>
To: Christoph Hellwig <hch@lst.de>,
Stefano Stabellini <sstabellini@kernel.org>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: xen-devel@lists.xenproject.org, iommu@lists.linux-foundation.org,
x86@kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [Xen-devel] [PATCH 07/11] swiotlb-xen: provide a single page-coherent.h header
Date: Fri, 16 Aug 2019 23:40:43 +0100 [thread overview]
Message-ID: <9a3261c6-5d92-cf6b-1ae8-3a8e8b5ef0d4@arm.com> (raw)
In-Reply-To: <20190816130013.31154-8-hch@lst.de>
Hi,
On 8/16/19 2:00 PM, Christoph Hellwig wrote:
> Merge the various page-coherent.h files into a single one that either
> provides prototypes or stubs depending on the need for cache
> maintainance.
>
> For extra benefits alo include <xen/page-coherent.h> in the file
> actually implementing the interfaces provided.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
> arch/arm/include/asm/xen/page-coherent.h | 2 --
> arch/arm/xen/mm.c | 1 +
> arch/arm64/include/asm/xen/page-coherent.h | 2 --
> arch/x86/include/asm/xen/page-coherent.h | 22 ------------------
> drivers/xen/swiotlb-xen.c | 4 +---
> include/Kbuild | 2 +-
> include/xen/{arm => }/page-coherent.h | 27 +++++++++++++++++++---
I am not sure I agree with this rename. The implementation of the
helpers are very Arm specific as this is assuming Dom0 is 1:1 mapped.
This was necessary due to the lack of IOMMU on Arm platforms back then.
But this is now a pain to get rid of it on newer platform...
Cheers,
--
Julien Grall
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next prev parent reply other threads:[~2019-08-16 22:41 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-16 13:00 [Xen-devel] swiotlb-xen cleanups Christoph Hellwig
2019-08-16 13:00 ` [Xen-devel] [PATCH 01/11] xen/arm: use dma-noncoherent.h calls for xen-swiotlb cache maintainance Christoph Hellwig
2019-08-19 11:45 ` Julien Grall
2019-08-26 9:20 ` Christoph Hellwig
2019-08-16 13:00 ` [Xen-devel] [PATCH 02/11] xen/arm: use dev_is_dma_coherent Christoph Hellwig
2019-08-19 11:31 ` Julien Grall
2019-08-16 13:00 ` [Xen-devel] [PATCH 03/11] xen/arm: pass one less argument to dma_cache_maint Christoph Hellwig
2019-08-16 13:37 ` Robin Murphy
2019-08-16 16:43 ` Christoph Hellwig
2019-08-16 13:00 ` [Xen-devel] [PATCH 04/11] xen/arm: remove xen_dma_ops Christoph Hellwig
2019-08-19 11:38 ` Julien Grall
2019-08-16 13:00 ` [Xen-devel] [PATCH 05/11] xen: remove the exports for xen_{create, destroy}_contiguous_region Christoph Hellwig
2019-08-16 13:00 ` [Xen-devel] [PATCH 06/11] swiotlb-xen: always use dma-direct helpers to alloc coherent pages Christoph Hellwig
2019-08-16 13:00 ` [Xen-devel] [PATCH 07/11] swiotlb-xen: provide a single page-coherent.h header Christoph Hellwig
2019-08-16 22:40 ` Julien Grall [this message]
2019-08-17 6:50 ` Christoph Hellwig
2019-08-17 18:20 ` Julien Grall
2019-08-16 13:00 ` [Xen-devel] [PATCH 08/11] swiotlb-xen: use the same foreign page check everywhere Christoph Hellwig
2019-08-19 13:53 ` Julien Grall
2019-08-16 13:00 ` [Xen-devel] [PATCH 09/11] swiotlb-xen: simplify cache maintainance Christoph Hellwig
2019-08-16 13:00 ` [Xen-devel] [PATCH 10/11] swiotlb-xen: merge xen_unmap_single into xen_swiotlb_unmap_page Christoph Hellwig
2019-08-16 13:00 ` [Xen-devel] [PATCH 11/11] arm64: use asm-generic/dma-mapping.h Christoph Hellwig
2019-08-19 7:32 ` Will Deacon
2019-08-27 2:00 ` [Xen-devel] swiotlb-xen cleanups Stefano Stabellini
2019-08-27 6:21 ` Christoph Hellwig
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