diff options
| author | Atish Patra <atishp@rivosinc.com> | 2022-01-20 01:09:17 -0800 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2022-01-20 09:27:16 -0800 |
| commit | 2ffc48fc7071da4b2d881b0f21d37ed05feb697b (patch) | |
| tree | fa6687a62f494303c5baf45bcb05aefe9ba1526d /arch/riscv/kernel/cpu_ops.c | |
| parent | 0b39eb38f85908e039ce8c9f09868438e029757b (diff) | |
RISC-V: Move spinwait booting method to its own config
The spinwait booting method should only be used for platforms with older
firmware without SBI HSM extension or M-mode firmware because spinwait
method can't support cpu hotplug, kexec or sparse hartid. It is better
to move the entire spinwait implementation to its own config which can
be disabled if required. It is enabled by default to maintain backward
compatibility and M-mode Linux.
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/kernel/cpu_ops.c')
| -rw-r--r-- | arch/riscv/kernel/cpu_ops.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/riscv/kernel/cpu_ops.c b/arch/riscv/kernel/cpu_ops.c index c1e30f403c3b..170d07e57721 100644 --- a/arch/riscv/kernel/cpu_ops.c +++ b/arch/riscv/kernel/cpu_ops.c @@ -15,7 +15,15 @@ const struct cpu_operations *cpu_ops[NR_CPUS] __ro_after_init; extern const struct cpu_operations cpu_ops_sbi; +#ifdef CONFIG_RISCV_BOOT_SPINWAIT extern const struct cpu_operations cpu_ops_spinwait; +#else +const struct cpu_operations cpu_ops_spinwait = { + .name = "", + .cpu_prepare = NULL, + .cpu_start = NULL, +}; +#endif void __init cpu_set_ops(int cpuid) { |