intel_th: pci: Use MSI interrupt signalling

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Since Intel TH is capable of MSI interrupt signalling, make use of it.
The way it works is, each of the 7 interrupt triggering events has its
own vector in this mode, as opposed to interrupt line delivery, where
all events are signalled via the same line. Failing to enable MSI, the
driver falls back to using an interrupt line.

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 11:44:40 +03:00 • committed by Greg Kroah-Hartman

parent 62a593022c

commit 7b7036d47c

2 changed files with 13 additions and 6 deletions

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3

drivers/hwtracing/intel_th/intel_th.h

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16

drivers/hwtracing/intel_th/pci.c

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