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| author |   Nicholas Piggin <npiggin@gmail.com> | 2021-06-30 17:46:16 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2021-06-30 22:21:20 +1000 |
| commit | 325678fd052259e7c05ef29060a73c705ea90432 (patch) | |
| tree | 4af33e651e345d979c3cdca9af3f9bccd7e10f38 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | powerpc/64e: remove implicit soft-masking and interrupt exit restart logic (diff) | |
| download | wireguard-linux-325678fd052259e7c05ef29060a73c705ea90432.tar.xz wireguard-linux-325678fd052259e7c05ef29060a73c705ea90432.zip | |
powerpc/64s: add a table of implicit soft-masked addresses
Commit 9d1988ca87dd ("powerpc/64: treat low kernel text as irqs
soft-masked") ends up catching too much code, including ret_from_fork,
and parts of interrupt and syscall return that do not expect to be
interrupts to be soft-masked. If an interrupt gets marked pending,
and then the code proceeds out of the implicit soft-masked region it
will fail to deal with the pending interrupt.
Fix this by adding a new table of addresses which explicitly marks
the regions of code that are soft masked. This table is only checked
for interrupts that below __end_soft_masked, so most kernel interrupts
will not have the overhead of the table search.
Fixes: 9d1988ca87dd ("powerpc/64: treat low kernel text as irqs soft-masked")
Reported-by: Sachin Sant <sachinp@linux.vnet.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Tested-by: Sachin Sant <sachinp@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210630074621.2109197-5-npiggin@gmail.com
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions