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Commit cb8cf4f8 authored by Lorenzo Pieralisi's avatar Lorenzo Pieralisi
Browse files

ARM: kernel: smp_setup_processor_id() updates 



This patch applies some basic changes to the smp_setup_processor_id()
ARM implementation to make the code that builds cpu_logical_map more
uniform across the kernel.

The function now prints the full extent of the boot CPU MPIDR[23:0] and
initializes the cpu_logical_map for CPUs up to nr_cpu_ids.

Signed-off-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: default avatarNicolas Pitre <nico@linaro.org>
Acked-by: default avatarWill Deacon <will.deacon@arm.com>
parent 71db5bfe

arch/arm/kernel/setup.c

+4 −3
Original line number Original line Diff line number Diff line
@@ -426,13 +426,14 @@ int __cpu_logical_map[NR_CPUS]; 
void __init smp_setup_processor_id(void)

void __init smp_setup_processor_id(void)

{

{

	int i;

	int i;

	u32 cpu = is_smp() ? read_cpuid_mpidr() & 0xff : 0;

	u32 mpidr = is_smp() ? read_cpuid_mpidr() & MPIDR_HWID_BITMASK : 0;

	u32 cpu = MPIDR_AFFINITY_LEVEL(mpidr, 0);





	cpu_logical_map(0) = cpu;

	cpu_logical_map(0) = cpu;

	for (i = 1; i < NR_CPUS; ++i)

	for (i = 1; i < nr_cpu_ids; ++i)

		cpu_logical_map(i) = i == cpu ? 0 : i;

		cpu_logical_map(i) = i == cpu ? 0 : i;





	printk(KERN_INFO "Booting Linux on physical CPU %d\n", cpu);

	printk(KERN_INFO "Booting Linux on physical CPU 0x%x\n", mpidr);

}

}





static void __init setup_processor(void)

static void __init setup_processor(void)