Messages in this thread Patch in this message | | | From | Atish Patra <> | Subject | [PATCH 3/4] RISC-V: Support nr_cpus command line option. | Date | Wed, 24 Apr 2019 14:48:00 -0700 |
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If nr_cpus command line option is set, maximum possible cpu should be set to that value.
Signed-off-by: Atish Patra <atish.patra@wdc.com> Reviewed-by: Christoph Hellwig <hch@lst.de> --- arch/riscv/kernel/smpboot. | 0 arch/riscv/kernel/smpboot.c | 10 +++++++++- 2 files changed, 9 insertions(+), 1 deletion(-) create mode 100644 arch/riscv/kernel/smpboot.
diff --git a/arch/riscv/kernel/smpboot. b/arch/riscv/kernel/smpboot. new file mode 100644 index 000000000000..e69de29bb2d1 diff --git a/arch/riscv/kernel/smpboot.c b/arch/riscv/kernel/smpboot.c index a8ad200581aa..7a0b62252524 100644 --- a/arch/riscv/kernel/smpboot.c +++ b/arch/riscv/kernel/smpboot.c @@ -84,11 +84,19 @@ void __init setup_smp(void) } cpuid_to_hartid_map(cpuid) = hart; - set_cpu_possible(cpuid, true); cpuid++; } BUG_ON(!found_boot_cpu); + + if (cpuid > nr_cpu_ids) + pr_warn("Total number of cpus [%d] is greater than nr_cpus option value [%d]\n", + cpuid, nr_cpu_ids); + + for (cpuid = 1; cpuid < nr_cpu_ids; cpuid++) { + if (cpuid_to_hartid_map(cpuid) != INVALID_HARTID) + set_cpu_possible(cpuid, true); + } } int __cpu_up(unsigned int cpu, struct task_struct *tidle) -- 2.21.0
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