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This repository has been archived by the owner on Dec 17, 2024. It is now read-only.
The Statistical Profiling Extension sample record format version is identified by PMSIDR_EL1.Format. The
architecture currently defines only version 0.
Note:
Armv8.7 defines the SPE sample record format version, allowing future architecture updates to extend or change
the record format. PMSIDR_EL1.Format was previously a RES0 field in a read-only register. Software that reads
and checks PMSIDR_EL1.Format on any implementation prior to Armv8.7 that includes SPE will read a value
indicating format version 0 is supported.
The sample record format version 0 is self-describing and extensible. This format allows software to parse profile
data even when that profile data contains extended information.
DOD:
Check in wperf-driver SPE sample record version and yield Kernel log with incompatible version (if applicable).
wperf should check HW_CFG flag spe_device.pmsidr_el1_value and warn users that we do not support SPE parser for spe_device.pmsidr_el1_value > 0.
The Statistical Profiling Extension sample record format version is identified by PMSIDR_EL1.Format. The
architecture currently defines only version 0.
Note:
DOD:
wperf-driver
SPE sample record version and yield Kernel log with incompatible version (if applicable).wperf
should check HW_CFG flagspe_device.pmsidr_el1_value
and warn users that we do not support SPE parser forspe_device.pmsidr_el1_value > 0
.PMSIDR_EL1, Sampling Profiling ID Register
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