powerpc/powernv: Re-enable imc trace-mode in kernel

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commit <249fad734a> ""powerpc/perf: Disable trace_imc pmu"
disables IMC(In-Memory Collection) trace-mode in kernel, since frequent
mode switching between accumulation mode and trace mode via the spr LDBAR
in the hardware can trigger a checkstop(system crash).

Patch to re-enable imc-trace mode in kernel.

The previous patch(1/2) in this series will address the mode switching issue
by implementing a global lock, and will restrict the usage of
accumulation and trace-mode at a time.

Signed-off-by: Anju T Sudhakar <anju@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200313055238.8656-2-anju@linux.vnet.ibm.com

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Anju T Sudhakar 2020-03-13 11:22:38 +05:30 • committed by Michael Ellerman

parent a36e8ba60b

commit 4bdd39460b

1 changed files with 1 additions and 8 deletions

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arch/powerpc/platforms/powernv/opal-imc.c

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