[Odroid C2][3.16.85] CNTKCTL_EL1 part left uninitialized leaving userspace high precision timing on CNTVCT_EL0 unavailable #423
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grooverdan
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Jan 5, 2022
As reported in MariaDB/mariadb-docker#338 and later hardkernel/linux#423. While modern kernels support this, it seems older hardware may be stuck at kernel versions without this initialization.
grooverdan
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Jan 5, 2022
As reported in MariaDB/mariadb-docker#338 and later hardkernel/linux#423. While modern kernels support this, it seems older hardware may be stuck at kernel versions without this initialization.
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From MariaDB/mariadb-docker#338 and for @jmburges, @stoinov and others.
The result of this lack of initialization to 1 is a SIGILL on workloads like MariaDB as they attempt to obtain timing information.
The above issue has a working kernel module (bottom of issue) to set the cpu registers.
If you could make @geoffreyblake 's module available or rework the initialization in for each CPU into the core code that would be most appreciated.
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