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.
change log:
>From V1 to V2:
Updated comments to match sign-offs from original patch.
Updated patch 5 and 7 to make sure they apply cleanly.
Jianxiong Gao (8):
driver core: add a min_align_mask field to struct
device_dma_parameters
swiotlb: factor out an 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
swiotlb: respect min_align_mask
nvme-pci: set min_align_mask
drivers/nvme/host/pci.c | 1 +
include/linux/device.h | 1 +
include/linux/dma-mapping.h | 16 +++
include/linux/swiotlb.h | 1 +
kernel/dma/swiotlb.c | 260 ++++++++++++++++++++----------------
5 files changed, 162 insertions(+), 117 deletions(-)
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2.27.0
