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From: Christoph Hellwig <hch@infradead.org>
To: Christoph Hellwig <hch@lst.de>
Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-mm@kvack.org, iommu@lists.linux-foundation.org,
	Paul Mackerras <paulus@samba.org>,
	linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH 08/34] powerpc/dma: untangle vio_dma_mapping_ops from dma_iommu_ops
Date: Thu, 6 Dec 2018 06:10:30 -0800
Message-ID: <20181206141030.GH29741@infradead.org> (raw)
In-Reply-To: <20181114082314.8965-9-hch@lst.de>

ping?

On Wed, Nov 14, 2018 at 09:22:48AM +0100, Christoph Hellwig wrote:
> vio_dma_mapping_ops currently does a lot of indirect calls through
> dma_iommu_ops, which not only make the code harder to follow but are
> also expensive in the post-spectre world.  Unwind the indirect calls
> by calling the ppc_iommu_* or iommu_* APIs directly applicable, or
> just use the dma_iommu_* methods directly where we can.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  arch/powerpc/include/asm/iommu.h     |  1 +
>  arch/powerpc/kernel/dma-iommu.c      |  2 +-
>  arch/powerpc/platforms/pseries/vio.c | 87 ++++++++++++----------------
>  3 files changed, 38 insertions(+), 52 deletions(-)
> 
> diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h
> index 35db0cbc9222..75daa10f31a4 100644
> --- a/arch/powerpc/include/asm/iommu.h
> +++ b/arch/powerpc/include/asm/iommu.h
> @@ -242,6 +242,7 @@ static inline int __init tce_iommu_bus_notifier_init(void)
>  }
>  #endif /* !CONFIG_IOMMU_API */
>  
> +u64 dma_iommu_get_required_mask(struct device *dev);
>  int dma_iommu_mapping_error(struct device *dev, dma_addr_t dma_addr);
>  
>  #else
> diff --git a/arch/powerpc/kernel/dma-iommu.c b/arch/powerpc/kernel/dma-iommu.c
> index 2ca6cfaebf65..0613278abf9f 100644
> --- a/arch/powerpc/kernel/dma-iommu.c
> +++ b/arch/powerpc/kernel/dma-iommu.c
> @@ -92,7 +92,7 @@ int dma_iommu_dma_supported(struct device *dev, u64 mask)
>  		return 1;
>  }
>  
> -static u64 dma_iommu_get_required_mask(struct device *dev)
> +u64 dma_iommu_get_required_mask(struct device *dev)
>  {
>  	struct iommu_table *tbl = get_iommu_table_base(dev);
>  	u64 mask;
> diff --git a/arch/powerpc/platforms/pseries/vio.c b/arch/powerpc/platforms/pseries/vio.c
> index 88f1ad1d6309..ea3a9745c812 100644
> --- a/arch/powerpc/platforms/pseries/vio.c
> +++ b/arch/powerpc/platforms/pseries/vio.c
> @@ -492,7 +492,9 @@ static void *vio_dma_iommu_alloc_coherent(struct device *dev, size_t size,
>  		return NULL;
>  	}
>  
> -	ret = dma_iommu_ops.alloc(dev, size, dma_handle, flag, attrs);
> +	ret = iommu_alloc_coherent(dev, get_iommu_table_base(dev), size,
> +				    dma_handle, dev->coherent_dma_mask, flag,
> +				    dev_to_node(dev));
>  	if (unlikely(ret == NULL)) {
>  		vio_cmo_dealloc(viodev, roundup(size, PAGE_SIZE));
>  		atomic_inc(&viodev->cmo.allocs_failed);
> @@ -507,8 +509,7 @@ static void vio_dma_iommu_free_coherent(struct device *dev, size_t size,
>  {
>  	struct vio_dev *viodev = to_vio_dev(dev);
>  
> -	dma_iommu_ops.free(dev, size, vaddr, dma_handle, attrs);
> -
> +	iommu_free_coherent(get_iommu_table_base(dev), size, vaddr, dma_handle);
>  	vio_cmo_dealloc(viodev, roundup(size, PAGE_SIZE));
>  }
>  
> @@ -518,22 +519,22 @@ static dma_addr_t vio_dma_iommu_map_page(struct device *dev, struct page *page,
>                                           unsigned long attrs)
>  {
>  	struct vio_dev *viodev = to_vio_dev(dev);
> -	struct iommu_table *tbl;
> +	struct iommu_table *tbl = get_iommu_table_base(dev);
>  	dma_addr_t ret = IOMMU_MAPPING_ERROR;
>  
> -	tbl = get_iommu_table_base(dev);
> -	if (vio_cmo_alloc(viodev, roundup(size, IOMMU_PAGE_SIZE(tbl)))) {
> -		atomic_inc(&viodev->cmo.allocs_failed);
> -		return ret;
> -	}
> -
> -	ret = dma_iommu_ops.map_page(dev, page, offset, size, direction, attrs);
> -	if (unlikely(dma_mapping_error(dev, ret))) {
> -		vio_cmo_dealloc(viodev, roundup(size, IOMMU_PAGE_SIZE(tbl)));
> -		atomic_inc(&viodev->cmo.allocs_failed);
> -	}
> -
> +	if (vio_cmo_alloc(viodev, roundup(size, IOMMU_PAGE_SIZE(tbl))))
> +		goto out_fail;
> +	ret = iommu_map_page(dev, tbl, page, offset, size, device_to_mask(dev),
> +			direction, attrs);
> +	if (unlikely(ret == IOMMU_MAPPING_ERROR))
> +		goto out_deallocate;
>  	return ret;
> +
> +out_deallocate:
> +	vio_cmo_dealloc(viodev, roundup(size, IOMMU_PAGE_SIZE(tbl)));
> +out_fail:
> +	atomic_inc(&viodev->cmo.allocs_failed);
> +	return IOMMU_MAPPING_ERROR;
>  }
>  
>  static void vio_dma_iommu_unmap_page(struct device *dev, dma_addr_t dma_handle,
> @@ -542,11 +543,9 @@ static void vio_dma_iommu_unmap_page(struct device *dev, dma_addr_t dma_handle,
>  				     unsigned long attrs)
>  {
>  	struct vio_dev *viodev = to_vio_dev(dev);
> -	struct iommu_table *tbl;
> -
> -	tbl = get_iommu_table_base(dev);
> -	dma_iommu_ops.unmap_page(dev, dma_handle, size, direction, attrs);
> +	struct iommu_table *tbl = get_iommu_table_base(dev);
>  
> +	iommu_unmap_page(tbl, dma_handle, size, direction, attrs);
>  	vio_cmo_dealloc(viodev, roundup(size, IOMMU_PAGE_SIZE(tbl)));
>  }
>  
> @@ -555,34 +554,32 @@ static int vio_dma_iommu_map_sg(struct device *dev, struct scatterlist *sglist,
>                                  unsigned long attrs)
>  {
>  	struct vio_dev *viodev = to_vio_dev(dev);
> -	struct iommu_table *tbl;
> +	struct iommu_table *tbl = get_iommu_table_base(dev);
>  	struct scatterlist *sgl;
>  	int ret, count;
>  	size_t alloc_size = 0;
>  
> -	tbl = get_iommu_table_base(dev);
>  	for_each_sg(sglist, sgl, nelems, count)
>  		alloc_size += roundup(sgl->length, IOMMU_PAGE_SIZE(tbl));
>  
> -	if (vio_cmo_alloc(viodev, alloc_size)) {
> -		atomic_inc(&viodev->cmo.allocs_failed);
> -		return 0;
> -	}
> -
> -	ret = dma_iommu_ops.map_sg(dev, sglist, nelems, direction, attrs);
> -
> -	if (unlikely(!ret)) {
> -		vio_cmo_dealloc(viodev, alloc_size);
> -		atomic_inc(&viodev->cmo.allocs_failed);
> -		return ret;
> -	}
> +	if (vio_cmo_alloc(viodev, alloc_size))
> +		goto out_fail;
> +	ret = ppc_iommu_map_sg(dev, tbl, sglist, nelems, device_to_mask(dev),
> +			direction, attrs);
> +	if (unlikely(!ret))
> +		goto out_deallocate;
>  
>  	for_each_sg(sglist, sgl, ret, count)
>  		alloc_size -= roundup(sgl->dma_length, IOMMU_PAGE_SIZE(tbl));
>  	if (alloc_size)
>  		vio_cmo_dealloc(viodev, alloc_size);
> -
>  	return ret;
> +
> +out_deallocate:
> +	vio_cmo_dealloc(viodev, alloc_size);
> +out_fail:
> +	atomic_inc(&viodev->cmo.allocs_failed);
> +	return 0;
>  }
>  
>  static void vio_dma_iommu_unmap_sg(struct device *dev,
> @@ -591,30 +588,18 @@ static void vio_dma_iommu_unmap_sg(struct device *dev,
>  		unsigned long attrs)
>  {
>  	struct vio_dev *viodev = to_vio_dev(dev);
> -	struct iommu_table *tbl;
> +	struct iommu_table *tbl = get_iommu_table_base(dev);
>  	struct scatterlist *sgl;
>  	size_t alloc_size = 0;
>  	int count;
>  
> -	tbl = get_iommu_table_base(dev);
>  	for_each_sg(sglist, sgl, nelems, count)
>  		alloc_size += roundup(sgl->dma_length, IOMMU_PAGE_SIZE(tbl));
>  
> -	dma_iommu_ops.unmap_sg(dev, sglist, nelems, direction, attrs);
> -
> +	ppc_iommu_unmap_sg(tbl, sglist, nelems, direction, attrs);
>  	vio_cmo_dealloc(viodev, alloc_size);
>  }
>  
> -static int vio_dma_iommu_dma_supported(struct device *dev, u64 mask)
> -{
> -        return dma_iommu_ops.dma_supported(dev, mask);
> -}
> -
> -static u64 vio_dma_get_required_mask(struct device *dev)
> -{
> -        return dma_iommu_ops.get_required_mask(dev);
> -}
> -
>  static const struct dma_map_ops vio_dma_mapping_ops = {
>  	.alloc             = vio_dma_iommu_alloc_coherent,
>  	.free              = vio_dma_iommu_free_coherent,
> @@ -623,8 +608,8 @@ static const struct dma_map_ops vio_dma_mapping_ops = {
>  	.unmap_sg          = vio_dma_iommu_unmap_sg,
>  	.map_page          = vio_dma_iommu_map_page,
>  	.unmap_page        = vio_dma_iommu_unmap_page,
> -	.dma_supported     = vio_dma_iommu_dma_supported,
> -	.get_required_mask = vio_dma_get_required_mask,
> +	.dma_supported     = dma_iommu_mapping_error,
> +	.get_required_mask = dma_iommu_get_required_mask,
>  	.mapping_error	   = dma_iommu_mapping_error,
>  };
>  
> -- 
> 2.19.1
> 
> _______________________________________________
> iommu mailing list
> iommu@lists.linux-foundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/iommu
---end quoted text---

  reply index

Thread overview: 175+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-14  8:22 use generic DMA mapping code in powerpc V4 Christoph Hellwig
2018-11-14  8:22 ` [PATCH 01/34] powerpc: use mm zones more sensibly Christoph Hellwig
2018-12-06 14:09   ` Christoph Hellwig
2018-12-07 12:18     ` Michael Ellerman
2018-12-07 14:09       ` Christoph Hellwig
2018-12-07 15:04         ` Christian Zigotzky
2018-11-14  8:22 ` [PATCH 02/34] powerpc: allow NOT_COHERENT_CACHE for amigaone Christoph Hellwig
2018-12-06 14:09   ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 03/34] powerpc/dma: remove the unused ARCH_HAS_DMA_MMAP_COHERENT define Christoph Hellwig
2018-12-06 14:09   ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 04/34] powerpc/dma: remove the unused ISA_DMA_THRESHOLD export Christoph Hellwig
2018-12-06 14:10   ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 05/34] powerpc/dma: remove the unused dma_iommu_ops export Christoph Hellwig
2018-12-06 14:10   ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 06/34] powerpc/dma: split the two __dma_alloc_coherent implementations Christoph Hellwig
2018-12-06 14:10   ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 07/34] powerpc/dma: remove the no-op dma_nommu_unmap_{page, sg} routines Christoph Hellwig
2018-12-06 14:10   ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 08/34] powerpc/dma: untangle vio_dma_mapping_ops from dma_iommu_ops Christoph Hellwig
2018-12-06 14:10   ` Christoph Hellwig [this message]
2018-11-14  8:22 ` [PATCH 09/34] powerpc/dma: handle iommu bypass in dma_iommu_ops Christoph Hellwig
2018-11-14  8:22 ` [PATCH 10/34] powerpc/pseries: unwind dma_get_required_mask_pSeriesLP a bit Christoph Hellwig
2018-11-14  8:22 ` [PATCH 11/34] powerpc/pseries: use the generic iommu bypass code Christoph Hellwig
2018-11-14  8:22 ` [PATCH 12/34] powerpc/cell: move dma direct window setup out of dma_configure Christoph Hellwig
2018-12-09 10:23   ` Michael Ellerman
2018-12-12 14:36     ` Christoph Hellwig
2018-12-14 13:29       ` Michael Ellerman
2018-12-14 16:42         ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 13/34] powerpc/cell: use the generic iommu bypass code Christoph Hellwig
2018-11-14  8:22 ` [PATCH 14/34] powerpc/dart: remove dead cleanup code in iommu_init_early_dart Christoph Hellwig
2018-12-06 14:11   ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 15/34] powerpc/dart: use the generic iommu bypass code Christoph Hellwig
2018-11-14  8:22 ` [PATCH 16/34] powerpc/powernv: remove pnv_pci_ioda_pe_single_vendor Christoph Hellwig
2018-11-14  8:22 ` [PATCH 17/34] powerpc/powernv: remove pnv_npu_dma_set_mask Christoph Hellwig
2018-11-14  8:22 ` [PATCH 18/34] powerpc/powernv: use the generic iommu bypass code Christoph Hellwig
2018-11-14  8:22 ` [PATCH 19/34] cxl: drop the dma_set_mask callback from vphb Christoph Hellwig
2018-12-06 14:10   ` Christoph Hellwig
2018-11-14  8:23 ` [PATCH 20/34] powerpc/dma: stop overriding dma_get_required_mask Christoph Hellwig
2018-11-14  8:23 ` [PATCH 21/34] powerpc/pci: remove the dma_set_mask pci_controller ops methods Christoph Hellwig
2018-11-14  8:23 ` [PATCH 22/34] powerpc/dma: remove the iommu fallback for coherent allocations Christoph Hellwig
2018-11-14  8:23 ` [PATCH 23/34] powerpc/dma: remove get_pci_dma_ops Christoph Hellwig
2018-11-14  8:23 ` [PATCH 24/34] powerpc/dma: move pci_dma_dev_setup_swiotlb to fsl_pci.c Christoph Hellwig
2018-11-14  8:23 ` [PATCH 25/34] powerpc/dma: remove max_direct_dma_addr Christoph Hellwig
2018-11-14  8:23 ` [PATCH 26/34] powerpc/dma: fix an off-by-one in dma_capable Christoph Hellwig
2018-11-14  8:23 ` [PATCH 27/34] powerpc/fsl_pci: simplify fsl_pci_dma_set_mask Christoph Hellwig
2018-11-14  8:23 ` [PATCH 28/34] dma-mapping, powerpc: simplify the arch dma_set_mask override Christoph Hellwig
2018-11-14  8:23 ` [PATCH 29/34] powerpc/dma: use phys_to_dma instead of get_dma_offset Christoph Hellwig
2018-11-14  8:23 ` [PATCH 30/34] powerpc/dma: remove dma_nommu_mmap_coherent Christoph Hellwig
2018-11-14  8:23 ` [PATCH 31/34] powerpc/dma: use generic direct and swiotlb ops Christoph Hellwig
2018-11-14  8:23 ` [PATCH 32/34] powerpc/dma: remove get_dma_offset Christoph Hellwig
2018-11-14  8:23 ` [PATCH 33/34] powerpc/dma: remove set_dma_offset Christoph Hellwig
2018-11-14  8:23 ` [PATCH 34/34] powerpc/dma: trim the fat from <asm/dma-mapping.h> Christoph Hellwig
2018-11-27  7:42 ` use generic DMA mapping code in powerpc V4 Christoph Hellwig
2018-11-27 22:05   ` Benjamin Herrenschmidt
2018-11-28 11:05   ` Michael Ellerman
2018-11-28 15:55     ` Christian Zigotzky
2018-11-28 20:02       ` Christian Zigotzky
2018-11-28 20:35       ` Michal Suchánek
2018-11-29 17:03         ` Christoph Hellwig
2018-11-29 12:05     ` Christian Zigotzky
2018-11-29 15:30       ` Christian Zigotzky
2018-11-29 17:03       ` Christoph Hellwig
2018-11-29 23:07         ` Christian Zigotzky
2018-11-30 10:53           ` Christoph Hellwig
2018-11-30 12:23             ` Christian Zigotzky
2018-11-30 13:10               ` Christoph Hellwig
2018-11-30 15:29                 ` Christian Zigotzky
2018-12-04  7:31                   ` Christian Zigotzky
2018-12-04  9:53                     ` Christian Zigotzky
2018-12-04 14:24                       ` Christoph Hellwig
2018-12-05  9:44                         ` Christian Zigotzky
2018-12-05 14:05                           ` Christoph Hellwig
2018-12-06 10:55                             ` Christian Zigotzky
2018-12-06 17:10                               ` Christian Zigotzky
2018-12-06 19:36                                 ` Christoph Hellwig
2018-12-07  7:48                                   ` Christian Zigotzky
2018-12-07 13:45                               ` Christian Zigotzky
2018-12-07 18:33                                 ` Christian Zigotzky
2018-12-08 10:29                                   ` Christian Zigotzky
2018-12-08 13:47                                     ` Christian Zigotzky
2018-12-09 14:20                                       ` Christian Zigotzky
2018-12-09 18:26                                         ` Christian Zigotzky
2018-12-10 15:54                                           ` Christian Zigotzky
2018-12-11 14:28                                             ` Christian Zigotzky
2018-12-11 18:17                                               ` Christian Zigotzky
2018-12-12  0:47                                                 ` Benjamin Herrenschmidt
2018-12-12  7:03                                                   ` Christian Zigotzky
2018-12-12 14:15                                                 ` Christoph Hellwig
2018-12-12 14:39                                                   ` Christian Zigotzky
2018-12-13  8:41                                                     ` Christian Zigotzky
2018-12-13  9:10                                                       ` Christoph Hellwig
2018-12-13  9:47                                                         ` Christian Zigotzky
2018-12-13 11:19                                                           ` Christian Zigotzky
2018-12-13 11:25                                                             ` Christoph Hellwig
2018-12-13 13:34                                                               ` Christian Zigotzky
2018-12-13 17:48                                                                 ` Christian Zigotzky
2018-12-13 21:53                                                                   ` Christian Zigotzky
2018-12-14 12:00                                                                     ` Christian Zigotzky
2018-12-14 16:45                                                                       ` Christoph Hellwig
2019-01-03  7:36                                                                       ` Christoph Hellwig
2019-01-03 19:26                                                                         ` Christian Zigotzky
2019-01-05 16:03                                                                           ` Christian Zigotzky
2019-01-09  9:31                                                                             ` Christian Zigotzky
2019-01-11  2:10                                                                               ` Christian Zigotzky
2019-01-12 18:14                                                                                 ` Christian Zigotzky
2019-01-15  8:07                                                                                   ` Christian Zigotzky
2019-01-15  8:49                                                                                     ` Christian Zigotzky
2019-01-15 10:55                                                                                       ` Christian Zigotzky
2019-01-15 13:35                                                                                         ` Christoph Hellwig
2019-01-15 13:56                                                                                           ` Christian Zigotzky
2019-01-15 15:17                                                                                             ` Christoph Hellwig
2019-01-17  9:21                                                                                               ` Christian Zigotzky
2019-01-17  9:31                                                                                                 ` Christoph Hellwig
2019-01-17  9:44                                                                                                   ` Christian Zigotzky
2019-01-18  8:35                                                                                                 ` Christoph Hellwig
2019-01-18 11:10                                                                                                   ` Christian Zigotzky
2019-01-18 11:28                                                                                                     ` Christoph Hellwig
2019-01-18 12:07                                                                                                       ` Christian Zigotzky
2019-01-18 12:18                                                                                                         ` Christoph Hellwig
2019-01-18 12:46                                                                                                           ` Christian Zigotzky
2019-01-18 12:55                                                                                                             ` Christoph Hellwig
2019-01-18 15:06                                                                                                               ` Christian Zigotzky
2019-01-19 11:40                                                                                                                 ` Christian Zigotzky
2019-01-19 11:52                                                                                                                   ` Christian Zigotzky
2019-01-19 13:02                                                                                                                     ` Christoph Hellwig
2019-01-19 14:04                                                                                                                       ` Christoph Hellwig
2019-01-21 14:38                                                                                                                         ` Christian Zigotzky
2019-01-23 14:34                                                                                                                           ` Christian Zigotzky
2019-01-25 13:37                                                                                                                             ` Christian Zigotzky
2019-01-27 13:13                                                                                                                               ` Christian Zigotzky
2019-01-28  7:04                                                                                                                                 ` Christoph Hellwig
2019-01-28 16:22                                                                                                                                   ` Christoph Hellwig
2019-01-28 16:52                                                                                                                                     ` Christian Zigotzky
2019-01-29 15:03                                                                                                                                       ` Christian Zigotzky
2019-01-29 16:14                                                                                                                                         ` Christoph Hellwig
2019-01-29 16:34                                                                                                                                           ` Christoph Hellwig
2019-01-30  4:40                                                                                                                                             ` Christian Zigotzky
2019-01-31 12:48                                                                                                                                               ` Christian Zigotzky
2019-02-01  8:04                                                                                                                                                 ` Christoph Hellwig
2019-02-01 16:54                                                                                                                                                   ` Christian Zigotzky
2019-02-03 16:49                                                                                                                                                     ` Christian Zigotzky
2019-02-04  7:56                                                                                                                                                       ` Christoph Hellwig
2019-02-04 12:13                                                                                                                                                         ` Christian Zigotzky
2019-02-04 12:38                                                                                                                                                           ` Christoph Hellwig
2019-02-06 13:45                                                                                                                                                             ` Christian Zigotzky
2019-02-06 15:15                                                                                                                                                               ` Christoph Hellwig
2019-02-06 15:16                                                                                                                                                                 ` Christoph Hellwig
2019-02-07  4:34                                                                                                                                                                   ` Christian Zigotzky
2019-02-08  9:01                                                                                                                                                                     ` Christian Zigotzky
2019-02-08  9:18                                                                                                                                                                       ` Christoph Hellwig
2019-02-08 10:59                                                                                                                                                                         ` Christian Zigotzky
2019-02-09 19:26                                                                                                                                                                         ` Darren Stevens
2019-02-09 21:10                                                                                                                                                                         ` Darren Stevens
2019-02-11  7:41                                                                                                                                                                           ` Christoph Hellwig
2019-02-10 12:00                                                                                                                                                                         ` Christian Zigotzky
     [not found]                                                                                                                                                                           ` <0042290A-2939-4EBA-A638-D404FA2055ED@xenosoft.de>
2019-02-11  7:21                                                                                                                                                                             ` Christian Zigotzky
2019-02-11  7:38                                                                                                                                                                           ` Christoph Hellwig
2019-02-12 12:42                                                                                                                                                                             ` Christian Zigotzky
2019-02-12 15:25                                                                                                                                                                               ` Christoph Hellwig
2019-02-12 19:31                                                                                                                                                                                 ` Christian Zigotzky
2019-02-12 19:50                                                                                                                                                                                   ` Christian Zigotzky
2019-02-12 19:52                                                                                                                                                                                     ` Christoph Hellwig
     [not found]                                                                               ` <46025f1b-db20-ac23-7dcd-10bc43bbb6ee@xenosoft.de>
     [not found]                                                                                 ` <20191105162856.GA15402@lst.de>
2019-11-07  9:53                                                                                   ` Bug 205201 - overflow of DMA mask and bus mask Christian Zigotzky
2019-11-10  7:27                                                                                     ` Christian Zigotzky
2019-11-11  8:12                                                                                       ` Christian Zigotzky
2019-11-11  8:16                                                                                         ` Christian Zigotzky
2019-11-11 12:22                                                                                           ` Christian Zigotzky
2019-11-12 14:41                                                                                             ` Christoph Hellwig
2019-11-12 22:58                                                                                               ` Christian Zigotzky
2019-11-13 10:14                                                                                               ` Christian Zigotzky
2019-11-13 11:02                                                                                                 ` Christoph Hellwig
2018-11-29 17:02     ` use generic DMA mapping code in powerpc V4 Christoph Hellwig
2018-12-08 17:03 ` Christoph Hellwig
2018-12-16 16:51 ` Christoph Hellwig
2018-12-17  1:14   ` Michael Ellerman

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