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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-02-08 15:10:22 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-02-11 23:35:08 +1100 |
| commit | 76249ddc27080b6b835a89cedcc4185b3b5a6b23 (patch) | |
| tree | 19927679b58d817e90a31e622d3ee778b4297bb8 /tools/perf/scripts/python/stackcollapse.py | |
| parent | eca2411040c1ee15b8882c6427fb4eb5a48ada69 (diff) | |
powerpc/32: On syscall entry, enable instruction translation at the same time as data
On 40x and 8xx, kernel text is pinned.
On book3s/32, kernel text is mapped by BATs.
Enable instruction translation at the same time as data translation, it
makes things simpler.
MSR_RI can also be set at the same time because srr0/srr1 are already
saved and r1 is set properly.
On booke, translation is always on, so at the end all PPC32
have translation on early.
This reduces null_syscall benchmark by 13 cycles on 8xx
(296 ==> 283 cycles).
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/3fe8891c814103a3549efc1d4e7ffc828bba5993.1612796617.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions