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Unverified Commit 8b4302a4 authored by Atish Patra's avatar Atish Patra Committed by Palmer Dabbelt
Browse files

RISC-V: Support nr_cpus command line option. 



If nr_cpus command line option is set, maximum possible cpu should be
set to that value.

Signed-off-by: default avatarAtish Patra <atish.patra@wdc.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarPalmer Dabbelt <palmer@sifive.com>
parent ab3d2650

arch/riscv/kernel/smpboot.c

+9 −1
Original line number Diff line number Diff line
@@ -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)