intel_th: Only report useful IRQs to subdevices

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The only type of IRQ triggering event that is useful to us at the moment
is the "last block" interrupt of the MSU. This interrupt can only be
enabled via "MINTCTL" register that doesn't exist in earlier version of
the Intel TH.

Enumerate the presence of MINTCTL via per-device driver data structure
and only instantiate the IRQ resource for subdevices if this capability
is present.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Alexander Shishkin 2019-05-03 11:44:42 +03:00 • committed by Greg Kroah-Hartman

parent aac8da6517

commit 4c5bb6eb40

3 changed files with 9 additions and 1 deletions

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7

drivers/hwtracing/intel_th/core.c

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2

drivers/hwtracing/intel_th/intel_th.h

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1

drivers/hwtracing/intel_th/pci.c

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