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-joro@xxxxxxxxxx/ > > V2: https://lore.kernel.org/lkml/20190115132257.6426-1-joro@xxxxxxxxxx/ > > V3: https://lore.kernel.org/lkml/20190123163049.24863-1-joro@xxxxxxxxxx/ > > V4: https://lore.kernel.org/lkml/20190129084342.26030-1-joro@xxxxxxxxxx/ > > 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 <thomas.lendacky@xxxxxxx> 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(-) >
