Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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41 lines
771 B
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MSR Trace Events
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The x86 kernel supports tracing most MSR (Model Specific Register) accesses.
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To see the definition of the MSRs on Intel systems please see the SDM
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at https://www.intel.com/sdm (Volume 3)
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Available trace points:
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/sys/kernel/tracing/events/msr/
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Trace MSR reads:
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read_msr
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- msr: MSR number
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- val: Value written
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- failed: 1 if the access failed, otherwise 0
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Trace MSR writes:
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write_msr
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- msr: MSR number
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- val: Value written
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- failed: 1 if the access failed, otherwise 0
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Trace RDPMC in kernel:
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rdpmc
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The trace data can be post processed with the postprocess/decode_msr.py script::
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cat /sys/kernel/tracing/trace | decode_msr.py /usr/src/linux/include/asm/msr-index.h
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to add symbolic MSR names.
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