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| author |   Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2014-11-21 11:04:39 +0000 |
|---|---|---|
| committer |   David Vrabel <david.vrabel@citrix.com> | 2014-12-04 12:41:51 +0000 |
| commit | a0f2dee0cd651efb5fac6a1d35b0a14460ebcdd4 (patch) | |
| tree | 744fe380abf1d0c9676cdec3e39e31e3863ef613 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | xen/arm: use is_device_dma_coherent (diff) | |
| download | linux-dev-a0f2dee0cd651efb5fac6a1d35b0a14460ebcdd4.tar.xz linux-dev-a0f2dee0cd651efb5fac6a1d35b0a14460ebcdd4.zip | |
xen: add a dma_addr_t dev_addr argument to xen_dma_map_page
dev_addr is the machine address of the page.
The new parameter can be used by the ARM and ARM64 implementations of
xen_dma_map_page to find out if the page is a local page (pfn == mfn) or
a foreign page (pfn != mfn).
dev_addr could be retrieved again from the physical address, using
pfn_to_mfn, but it requires accessing an rbtree. Since we already have
the dev_addr in our hands at the call site there is no need to get the
mfn twice.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions