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(-)
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2.27.0
