coresight: etm4x: Fix timestamp bit field handling

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Timestamps in the trace data appear as all zeros on recent kernels,
although the feature works correctly on old kernels (e.g., v6.12).

Since commit c382ee674c ("arm64/sysreg/tools: Move TRFCR definitions
to sysreg"), the TRFCR_ELx_TS_{VIRTUAL|GUEST_PHYSICAL|PHYSICAL} macros
were updated to remove the bit shift. As a result, the driver no longer
shifts bits when operates the timestamp field.

Fix this by using the FIELD_PREP() and FIELD_GET() helpers.

Reported-by: Tamas Zsoldos <tamas.zsoldos@arm.com>
Fixes: c382ee674c ("arm64/sysreg/tools: Move TRFCR definitions to sysreg")
Signed-off-by: Leo Yan <leo.yan@arm.com>
Reviewed-by: James Clark <james.clark@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20250519174945.2245271-2-leo.yan@arm.com

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This commit is contained in:

Leo Yan 2025-05-19 18:49:44 +01:00 • committed by Suzuki K Poulose

parent d23bc38e8a

commit ee811bc733

2 changed files with 3 additions and 3 deletions

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2

drivers/hwtracing/coresight/coresight-etm4x-core.c

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4

drivers/hwtracing/coresight/coresight-etm4x-sysfs.c

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