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authorPiotr Jaroszynski <[email protected]>2025-03-04 08:51:27 +0000
committerWill Deacon <[email protected]>2025-03-11 11:37:43 +0000
commitf7edb07ad7c66eab3dce57384f33b9799d579133 (patch)
tree3b99b53ccfe1de0d0158c029e64e6595a7ef81f5 /tools/testing/selftests/net/lib/py/utils.py
parentarm64: mm: Populate vmemmap at the page level if not section aligned (diff)
downloadkernel-f7edb07ad7c66eab3dce57384f33b9799d579133.tar.gz
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Fix mmu notifiers for range-based invalidates
Update the __flush_tlb_range_op macro not to modify its parameters as these are unexepcted semantics. In practice, this fixes the call to mmu_notifier_arch_invalidate_secondary_tlbs() in __flush_tlb_range_nosync() to use the correct range instead of an empty range with start=end. The empty range was (un)lucky as it results in taking the invalidate-all path that doesn't cause correctness issues, but can certainly result in suboptimal perf. This has been broken since commit 6bbd42e2df8f ("mmu_notifiers: call invalidate_range() when invalidating TLBs") when the call to the notifiers was added to __flush_tlb_range(). It predates the addition of the __flush_tlb_range_op() macro from commit 360839027a6e ("arm64: tlb: Refactor the core flush algorithm of __flush_tlb_range") that made the bug hard to spot. Fixes: 6bbd42e2df8f ("mmu_notifiers: call invalidate_range() when invalidating TLBs") Signed-off-by: Piotr Jaroszynski <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Will Deacon <[email protected]> Cc: Robin Murphy <[email protected]> Cc: Alistair Popple <[email protected]> Cc: Raghavendra Rao Ananta <[email protected]> Cc: SeongJae Park <[email protected]> Cc: Jason Gunthorpe <[email protected]> Cc: John Hubbard <[email protected]> Cc: Nicolin Chen <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Reviewed-by: Catalin Marinas <[email protected]> Reviewed-by: Alistair Popple <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Will Deacon <[email protected]>
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