]> git.baikalelectronics.ru Git - kernel.git/commit
coresight: etm4x: Run arch feature detection on the CPU
authorSuzuki K Poulose <suzuki.poulose@arm.com>
Mon, 1 Feb 2021 18:13:46 +0000 (11:13 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 4 Feb 2021 16:00:34 +0000 (17:00 +0100)
commitfe2dfb90857a50532d82cf06e844ab85d16689a3
tree1e9c5deeeb93fed3c0b0e1e3713971720bc90fed
parent1616621bc800d691a34c7c4173a806bf784798e4
coresight: etm4x: Run arch feature detection on the CPU

As we are about to add support for system register based devices,
we don't get an AMBA pid. So, the detection code could check
the system registers running on the CPU to check for the architecture
specific features. Thus we move the arch feature detection to
run on the CPU. We cannot always read the PID from the HW, as the
PID could be overridden by DT for broken devices. So, use the
PID from AMBA layer if available.

Link: https://lore.kernel.org/r/20210110224850.1880240-25-suzuki.poulose@arm.com
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: liuqi115@huawei.com
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/20210201181351.1475223-27-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/hwtracing/coresight/coresight-etm4x-core.c