Re: [PATCH 0/5 v5] Fix virtio-blk issue with SWIOTLB
On Wed, Jan 30, 2019 at 01:35:13PM -0500, Konrad Rzeszutek Wilk wrote: > On Wed, Jan 30, 2019 at 05:40:02PM +0100, Joerg Roedel wrote: > > Hi, > > > > here is the next version of this patch-set. Previous > > versions can be found here: > > > > V1: https://lore.kernel.org/lkml/20190110134433.15672-1-j...@8bytes.org/ > > > > V2: https://lore.kernel.org/lkml/20190115132257.6426-1-j...@8bytes.org/ > > > > V3: https://lore.kernel.org/lkml/20190123163049.24863-1-j...@8bytes.org/ > > > > V4: https://lore.kernel.org/lkml/20190129084342.26030-1-j...@8bytes.org/ > > > > The problem solved here is a limitation of the SWIOTLB implementation, > > which does not support allocations larger than 256kb. When the > > virtio-blk driver tries to read/write a block larger than that, the > > allocation of the dma-handle fails and an IO error is reported. > > > > Changes to v4 are: > > > > - Added Reviewed-by tags from Christoph > > > > - Added missing EXPORT_SYMBOL(_GPL) lines > > > > Please review. > > I can put it in my tree and send it to Linus .. unless folks want > to do it through a different tree? I queued it in my tree as it seems virtio specific. > > > > > Thanks, > > > > Joerg > > Joerg Roedel (5): > > swiotlb: Introduce swiotlb_max_mapping_size() > > swiotlb: Add is_swiotlb_active() function > > dma: Introduce dma_max_mapping_size() > > virtio: Introduce virtio_max_dma_size() > > virtio-blk: Consider virtio_max_dma_size() for maximum segment size > > > > Documentation/DMA-API.txt| 8 > > drivers/block/virtio_blk.c | 10 ++ > > drivers/virtio/virtio_ring.c | 11 +++ > > include/linux/dma-mapping.h | 16 > > include/linux/swiotlb.h | 11 +++ > > include/linux/virtio.h | 2 ++ > > kernel/dma/direct.c | 12 > > kernel/dma/swiotlb.c | 14 ++ > > 8 files changed, 80 insertions(+), 4 deletions(-) > > > > -- > > 2.17.1 > > ___ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
Re: [PATCH 0/5 v5] Fix virtio-blk issue with SWIOTLB
On Wed, Jan 30, 2019 at 05:40:02PM +0100, Joerg Roedel wrote: > Hi, > > here is the next version of this patch-set. Previous > versions can be found here: > > V1: https://lore.kernel.org/lkml/20190110134433.15672-1-j...@8bytes.org/ > > V2: https://lore.kernel.org/lkml/20190115132257.6426-1-j...@8bytes.org/ > > V3: https://lore.kernel.org/lkml/20190123163049.24863-1-j...@8bytes.org/ > > V4: https://lore.kernel.org/lkml/20190129084342.26030-1-j...@8bytes.org/ > > The problem solved here is a limitation of the SWIOTLB implementation, > which does not support allocations larger than 256kb. When the > virtio-blk driver tries to read/write a block larger than that, the > allocation of the dma-handle fails and an IO error is reported. > > Changes to v4 are: > > - Added Reviewed-by tags from Christoph > > - Added missing EXPORT_SYMBOL(_GPL) lines > > Please review. I can put it in my tree and send it to Linus .. unless folks want to do it through a different tree? > > Thanks, > > Joerg > Joerg Roedel (5): > swiotlb: Introduce swiotlb_max_mapping_size() > swiotlb: Add is_swiotlb_active() function > dma: Introduce dma_max_mapping_size() > virtio: Introduce virtio_max_dma_size() > virtio-blk: Consider virtio_max_dma_size() for maximum segment size > > Documentation/DMA-API.txt| 8 > drivers/block/virtio_blk.c | 10 ++ > drivers/virtio/virtio_ring.c | 11 +++ > include/linux/dma-mapping.h | 16 > include/linux/swiotlb.h | 11 +++ > include/linux/virtio.h | 2 ++ > kernel/dma/direct.c | 12 > kernel/dma/swiotlb.c | 14 ++ > 8 files changed, 80 insertions(+), 4 deletions(-) > > -- > 2.17.1 > ___ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
Re: [PATCH 0/5 v5] Fix virtio-blk issue with SWIOTLB
On 1/30/19 10:40 AM, Joerg Roedel wrote: > Hi, > > here is the next version of this patch-set. Previous > versions can be found here: > > V1: https://lore.kernel.org/lkml/20190110134433.15672-1-j...@8bytes.org/ > > V2: https://lore.kernel.org/lkml/20190115132257.6426-1-j...@8bytes.org/ > > V3: https://lore.kernel.org/lkml/20190123163049.24863-1-j...@8bytes.org/ > > V4: https://lore.kernel.org/lkml/20190129084342.26030-1-j...@8bytes.org/ > > The problem solved here is a limitation of the SWIOTLB implementation, > which does not support allocations larger than 256kb. When the > virtio-blk driver tries to read/write a block larger than that, the > allocation of the dma-handle fails and an IO error is reported. > > Changes to v4 are: > > - Added Reviewed-by tags from Christoph > > - Added missing EXPORT_SYMBOL(_GPL) lines > > Please review. Looks good. Booted and tested using an SEV guest without any issues. Tested-by: Tom Lendacky Thanks, Tom > > Thanks, > > Joerg > Joerg Roedel (5): > swiotlb: Introduce swiotlb_max_mapping_size() > swiotlb: Add is_swiotlb_active() function > dma: Introduce dma_max_mapping_size() > virtio: Introduce virtio_max_dma_size() > virtio-blk: Consider virtio_max_dma_size() for maximum segment size > > Documentation/DMA-API.txt| 8 > drivers/block/virtio_blk.c | 10 ++ > drivers/virtio/virtio_ring.c | 11 +++ > include/linux/dma-mapping.h | 16 > include/linux/swiotlb.h | 11 +++ > include/linux/virtio.h | 2 ++ > kernel/dma/direct.c | 12 > kernel/dma/swiotlb.c | 14 ++ > 8 files changed, 80 insertions(+), 4 deletions(-) > ___ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
[PATCH 0/5 v5] Fix virtio-blk issue with SWIOTLB
Hi, here is the next version of this patch-set. Previous versions can be found here: V1: https://lore.kernel.org/lkml/20190110134433.15672-1-j...@8bytes.org/ V2: https://lore.kernel.org/lkml/20190115132257.6426-1-j...@8bytes.org/ V3: https://lore.kernel.org/lkml/20190123163049.24863-1-j...@8bytes.org/ V4: https://lore.kernel.org/lkml/20190129084342.26030-1-j...@8bytes.org/ The problem solved here is a limitation of the SWIOTLB implementation, which does not support allocations larger than 256kb. When the virtio-blk driver tries to read/write a block larger than that, the allocation of the dma-handle fails and an IO error is reported. Changes to v4 are: - Added Reviewed-by tags from Christoph - Added missing EXPORT_SYMBOL(_GPL) lines Please review. Thanks, Joerg Joerg Roedel (5): swiotlb: Introduce swiotlb_max_mapping_size() swiotlb: Add is_swiotlb_active() function dma: Introduce dma_max_mapping_size() virtio: Introduce virtio_max_dma_size() virtio-blk: Consider virtio_max_dma_size() for maximum segment size Documentation/DMA-API.txt| 8 drivers/block/virtio_blk.c | 10 ++ drivers/virtio/virtio_ring.c | 11 +++ include/linux/dma-mapping.h | 16 include/linux/swiotlb.h | 11 +++ include/linux/virtio.h | 2 ++ kernel/dma/direct.c | 12 kernel/dma/swiotlb.c | 14 ++ 8 files changed, 80 insertions(+), 4 deletions(-) -- 2.17.1 ___ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
