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author | Suzuki K Poulose | 2021-02-01 11:13:33 -0700 |
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committer | Greg Kroah-Hartman | 2021-02-04 17:00:33 +0100 |
commit | 03336d0f4d0d74e7a5f899bf9d4933e0d4397c94 (patch) | |
tree | a78850dcefb5e7e98a240fd3ab93329538f21334 /Documentation/x86 | |
parent | 4f2a67266ab3dd29d3087b3297014a17367f2b26 (diff) |
coresight: etm4x: Add sysreg access helpers
ETM architecture defines the system instructions for accessing
via register accesses. Add basic support for accessing a given
register via system instructions.
We split the list of registers as :
1) Accessible only from memory mapped interface
2) Accessible from system register instructions.
All registers are accessible via the memory-mapped interface.
However, some registers are not accessible via the system
instructions. This list is then used to further filter out
the files we expose via sysfs.
Link: https://lore.kernel.org/r/20210110224850.1880240-12-suzuki.poulose@arm.com
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20210201181351.1475223-14-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/x86')
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