arm64: Make the CPU information more clear (64f17818) · Commits · 戴 / test

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>

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);

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