Hi all, This series fixes the issues which have been reported against the Restricted DMA series in -next:
* Fix the build for Sparc as reported by Guenter [1]. * Rework the lifetime of 'io_tlb_default_mem' so that devices can retain valid references to it even after swiotlb_exit(). This, in turn, fixes the x86/AMD IOMMU regressions reported by Nathan [2]. I also then added a diagnostic to swiotlb_exit(), as suggested by Konrad [3] and the final patch frees the underlying buffer memory during the tear down, but I must confess that I don't know why this wasn't being done already. A massive thank you to Nathan for helping to debug this and also for testing these patches to confirm that they address the issue on his machine. Patches are based against swiotlb devel/for-linus-5.15. Cheers, Will [1] https://lore.kernel.org/r/20210702030807.ga2685...@roeck-us.net [2] https://lore.kernel.org/r/YNvMDFWKXSm4LRfZ@Ryzen-9-3900X.localdomain [3] https://lore.kernel.org/r/yorsr0h7u5l9d...@char.us.oracle.com Cc: Guenter Roeck <li...@roeck-us.net> Cc: Claire Chang <tien...@chromium.org> Cc: Christoph Hellwig <h...@lst.de> Cc: Robin Murphy <robin.mur...@arm.com> Cc: Konrad Rzeszutek Wilk <konrad.w...@oracle.com> Cc: Nathan Chancellor <nat...@kernel.org> --->8 Will Deacon (5): of: Return success from of_dma_set_restricted_buffer() when !OF_ADDRESS swiotlb: Point io_default_tlb_mem at static allocation swiotlb: Remove io_tlb_default_mem indirection swiotlb: Emit diagnostic in swiotlb_exit() swiotlb: Free tbl memory in swiotlb_exit() drivers/base/core.c | 2 +- drivers/of/of_private.h | 3 +- drivers/xen/swiotlb-xen.c | 4 +- include/linux/swiotlb.h | 4 +- kernel/dma/swiotlb.c | 82 +++++++++++++++++++++++---------------- 5 files changed, 56 insertions(+), 39 deletions(-) -- 2.32.0.402.g57bb445576-goog _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu