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intel_th: Add Memory Storage Unit driver

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Memory Storage Unit (MSU) is a trace output device that collects trace
data to system memory. It consists of 2 independent Memory Storage
Controllers (MSCs).

This driver provides userspace interfaces to configure in-memory tracing
parameters, such as contiguous (high-order allocation) buffer or multiblock
(scatter list) buffer mode, wrapping (data overwrite) and number and sizes
of windows in multiblock mode. Userspace can read the buffers via mmap()ing
or read()ing of the corresponding device node.

Signed-off-by: Laurent Fert <laurent.fert@intel.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Shishkin
2015-09-22 15:47:18 +03:00
committed by Greg Kroah-Hartman
parent f04e449fc7
commit ba82664c13
5 changed files with 1671 additions and 0 deletions
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3
drivers/hwtracing/intel_th/Makefile
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@@ -10,3 +10,6 @@ intel_th_gth-y := gth.o
obj-$(CONFIG_INTEL_TH_STH) += intel_th_sth.o
intel_th_sth-y := sth.o
obj-$(CONFIG_INTEL_TH_MSU) += intel_th_msu.o
intel_th_msu-y := msu.o