coresight-stm: support mmapping channel regions with mmio_addr

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CoreSight STM device allows direct mapping of the channel regions to
userspace for zero-copy writing. To support this ability, the STM
framework has provided a hook 'mmio_addr', this patch just implemented
this hook for CoreSight STM.

This patch also added an item into 'channel_space' to save the physical
base address of channel region which mmap operation needs to know.

Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Chunyan Zhang 2016-08-25 15:18:52 -06:00 • committed by Greg Kroah-Hartman

parent b839215372

commit f3864d8562

1 changed files with 22 additions and 0 deletions

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drivers/hwtracing/coresight/coresight-stm.c

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