arch: riscv: smp: allow other IPI implementation #81256
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Made this into a PR of its own as I think that this should go in regardless of the PR for ipi_plic implementation. This is essentially a repackaged version of #65824, less the per-core init stuff. |
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fkokosinski,
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npitre and
tgorochowik
The currently IPI implementation assumes that CLINT exists in the system, however, that might not be the case as IPI can be implemented with PLIC that supports software-triggering as well, such as the Andes NCEPLIC100. Refactor the CLINT-based IPI implementations into `ipi_clint.c`, and create Kconfig that selects the CLINT implementation when `sifive-clint0` exists and enabled, otherwise default to `RISCV_SMP_IPI_CUSTOM` which allows OOT implementation. This also makes way for the upstreaming of non-clint IPI implementation later. Signed-off-by: Yong Cong Sin <[email protected]>
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fkokosinski
approved these changes
Nov 12, 2024
npitre
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Nov 12, 2024
cfriedt
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Nov 13, 2024
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The currently IPI implementation assumes that CLINT exists in the system, however, that might not be the case as IPI can be implemented with PLIC that supports software-triggering as well, such as the Andes NCEPLIC100.
Refactor the CLINT-based IPI implementations into
ipi_clint.c, and create Kconfig that selects the CLINT implementation whensifive-clint0exists and enabled, otherwise default toRISCV_SMP_IPI_CUSTOMwhich allows OOT implementation. This also makes way for the upstreaming of non-clint IPI implementation later.