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| author | Leonardo Bras <[email protected]> | 2021-04-20 04:54:04 +0000 |
|---|---|---|
| committer | Michael Ellerman <[email protected]> | 2021-04-21 12:52:31 +0000 |
| commit | a9d2f9bb225fd2a764aef57738ab6c7f38d782ae (patch) | |
| tree | c97668fa571d9b4bac903f003d2ec521d56e5a4a /arch/powerpc/lib/code-patching.c | |
| parent | powerpc/kvm: Fix PR KVM with KUAP/MEM_KEYS enabled (diff) | |
| download | kernel-a9d2f9bb225fd2a764aef57738ab6c7f38d782ae.tar.gz kernel-a9d2f9bb225fd2a764aef57738ab6c7f38d782ae.zip | |
powerpc/pseries/iommu: Fix window size for direct mapping with pmem
As of today, if the DDW is big enough to fit (1 << MAX_PHYSMEM_BITS)
it's possible to use direct DMA mapping even with pmem region.
But, if that happens, the window size (len) is set to (MAX_PHYSMEM_BITS
- page_shift) instead of MAX_PHYSMEM_BITS, causing a pagesize times
smaller DDW to be created, being insufficient for correct usage.
Fix this so the correct window size is used in this case.
Fixes: bf6e2d562bbc4 ("powerpc/dma: Fallback to dma_ops when persistent memory present")
Signed-off-by: Leonardo Bras <[email protected]>
Reviewed-by: Alexey Kardashevskiy <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'arch/powerpc/lib/code-patching.c')
0 files changed, 0 insertions, 0 deletions