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| author | Leonardo Bras <leobras.c@gmail.com> | 2021-04-08 17:19:16 -0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-04-14 23:04:16 +1000 |
| commit | 472724111f0f72042deb6a9dcee9578e5398a1a1 (patch) | |
| tree | 3856b1ee1b5366aa0610628da442903bb2a069cc /tools/perf/scripts/python/netdev-times.py | |
| parent | powerpc/syscalls: switch to generic syscallhdr.sh (diff) | |
| download | linux-472724111f0f72042deb6a9dcee9578e5398a1a1.tar.gz linux-472724111f0f72042deb6a9dcee9578e5398a1a1.zip | |
powerpc/iommu: Enable remaining IOMMU Pagesizes present in LoPAR
According to LoPAR, ibm,query-pe-dma-window output named "IO Page Sizes"
will let the OS know all possible pagesizes that can be used for creating a
new DDW.
Currently Linux will only try using 3 of the 8 available options:
4K, 64K and 16M. According to LoPAR, Hypervisor may also offer 32M, 64M,
128M, 256M and 16G.
Enabling bigger pages would be interesting for direct mapping systems
with a lot of RAM, while using less TCE entries.
Signed-off-by: Leonardo Bras <leobras.c@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210408201915.174217-1-leobras.c@gmail.com
Diffstat (limited to 'tools/perf/scripts/python/netdev-times.py')
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