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| author | Gaurav Batra <gbatra@linux.ibm.com> | 2025-11-07 10:11:05 -0600 |
|---|---|---|
| committer | Madhavan Srinivasan <maddy@linux.ibm.com> | 2026-01-07 09:33:55 +0530 |
| commit | 1471c517cf7dae1a6342fb821d8ed501af956dd0 (patch) | |
| tree | 8adae503ae559b9eb3fe6e6f5ffd86854621fe24 /tools/perf/scripts/python | |
| parent | 20ab1d11265350a9ea3d315d6c70170b8198f329 (diff) | |
| download | linux-1471c517cf7dae1a6342fb821d8ed501af956dd0.tar.gz linux-1471c517cf7dae1a6342fb821d8ed501af956dd0.zip | |
powerpc/iommu: bypass DMA APIs for coherent allocations for pre-mapped memory
Leverage ARCH_HAS_DMA_MAP_DIRECT config option for coherent allocations as
well. This will bypass DMA ops for memory allocations that have been
pre-mapped.
Always set device bus_dma_limit when memory is pre-mapped. In some
architectures, like PowerPC, pmemory can be converted to regular memory via
daxctl command. This will gate the coherent allocations to pre-mapped RAM
only, by dma_coherent_ok().
Signed-off-by: Gaurav Batra <gbatra@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20251107161105.85999-1-gbatra@linux.ibm.com
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions