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| H A D | entry.S | 058cf7120c26d72cbcf802fc5ee82b6f1427b27c Fri Nov 10 03:32:16 UTC 2023 Alvin Chang <alvinga@andestech.com> core: riscv: Do not restrict primary hart to hart ID 0 only
The ID of primary hart should not be restricted to zero. Thus,
determining primary hart and secondart harts by zero hart ID is not
feasible.
We refer to RISC-V linux kernel [1] to fix this issue, by adding a
"hart_lottery" variable. The first hart who enters OP-TEE will win the
lottery, atomically increment this variable, and be the primary hart.
Other harts enter OP-TEE later won't win the lottery, so they execute
the secondary boot sequence.
[1]:
https://github.com/torvalds/linux/blob/v6.7/arch/riscv/kernel/head.S#L244
Signed-off-by: Alvin Chang <alvinga@andestech.com>
Reviewed-by: Marouene Boubakri <marouene.boubakri@nxp.com>
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