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Commit 64f17818 authored Oct 19, 2015 by Suzuki K. Poulose Committed by Catalin Marinas Oct 21, 2015

arm64: Make the CPU information more clear



At early boot, we print the CPU version/revision. On a heterogeneous
system, we could have different types of CPUs. Print the CPU info for
all active cpus. Also, the secondary CPUs prints the message only when
they turn online.

Also, remove the redundant 'revision' information which doesn't
make any sense without the 'variant' field.

Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com>
Tested-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

parent 56a3f30e

arch/arm64/kernel/setup.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -203,8 +203,7 @@ static void __init setup_processor(void)
		u32 cwg;
		int cls;

		printk("CPU: AArch64 Processor [%08x] revision %d\n",
		read_cpuid_id(), read_cpuid_id() & 15);
		pr_info("Boot CPU: AArch64 Processor [%08x]\n", read_cpuid_id());

		sprintf(init_utsname()->machine, ELF_PLATFORM);
		elf_hwcap = 0;

arch/arm64/kernel/smp.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -144,7 +144,6 @@ asmlinkage void secondary_start_kernel(void)
		current->active_mm = mm;

		set_my_cpu_offset(per_cpu_offset(smp_processor_id()));
		printk("CPU%u: Booted secondary processor\n", cpu);

		/*
		* TTBR0 is only used for the identity mapping at this stage. Make it
		@@ -177,6 +176,8 @@ asmlinkage void secondary_start_kernel(void)
		* the CPU migration code to notice that the CPU is online
		* before we continue.
		*/
		pr_info("CPU%u: Booted secondary processor [%08x]\n",
		cpu, read_cpuid_id());
		set_cpu_online(cpu, true);
		complete(&cpu_running);