| Message ID | 20210405205109.1700468-1-jxgao@google.com |
|---|---|
| Headers | show |
| Series | preserve DMA offsets when using swiotlb | expand |
On Mon, Apr 05, 2021 at 08:51:01PM +0000, Jianxiong Gao wrote: >Hi all, > >This series of backports fixes the SWIOTLB library to maintain the >page offset when mapping a DMA address. The bug that motivated this >patch series manifested when running a 5.4 kernel as a SEV guest with >an NVMe device. However, any device that infers information from the >page offset and is accessed through the SWIOTLB will benefit from this >bug fix. > >Jianxiong Gao (7): > driver core: add a min_align_mask field to struct > device_dma_parameters > swiotlb: add a io_tlb_offset helper > swiotlb: factor out a nr_slots helper > swiotlb: clean up swiotlb_tbl_unmap_single > swiotlb: refactor swiotlb_tbl_map_single > swiotlb: don't modify orig_addr in swiotlb_tbl_sync_single > nvme-pci: set min_align_mask > >Linus Torvalds (1): > Linux 5.4 This is clearly wrong :) This series also doesn't apply cleanly, what did you use as a base? Also, why are the sign-offs on individual patches different between your patches and upstream? -- Thanks, Sasha
Hi all, This series of backports fixes the SWIOTLB library to maintain the page offset when mapping a DMA address. The bug that motivated this patch series manifested when running a 5.4 kernel as a SEV guest with an NVMe device. However, any device that infers information from the page offset and is accessed through the SWIOTLB will benefit from this bug fix. Jianxiong Gao (7): driver core: add a min_align_mask field to struct device_dma_parameters swiotlb: add a io_tlb_offset helper swiotlb: factor out a nr_slots helper swiotlb: clean up swiotlb_tbl_unmap_single swiotlb: refactor swiotlb_tbl_map_single swiotlb: don't modify orig_addr in swiotlb_tbl_sync_single nvme-pci: set min_align_mask Linus Torvalds (1): Linux 5.4 Makefile | 2 +- drivers/nvme/host/pci.c | 1 + include/linux/device.h | 1 + include/linux/dma-mapping.h | 16 +++ include/linux/swiotlb.h | 3 +- kernel/dma/swiotlb.c | 262 ++++++++++++++++++++---------------- 6 files changed, 165 insertions(+), 120 deletions(-)