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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> |
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