Commit e8d432c9 authored Nov 06, 2012 by Lorenzo Pieralisi

ARM: kernel: add MIDR to per-CPU information data

The advent of big.LITTLE ARM platforms requires the kernel to be able
to identify the MIDRs of all online CPUs upon request. MIDRs are stashed
at boot time so that kernel subsystems can detect the MIDR of online CPUs
by simply retrieving per-CPU data updated by all booted CPUs.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>

parent 77b67063

arch/arm/include/asm/cpu.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -15,6 +15,7 @@

		struct cpuinfo_arm {
		struct cpu cpu;
		u32 cpuid;
		#ifdef CONFIG_SMP
		unsigned int loops_per_jiffy;
		#endif

arch/arm/kernel/smp.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -281,6 +281,7 @@ static void __cpuinit smp_store_cpu_info(unsigned int cpuid)
		struct cpuinfo_arm *cpu_info = &per_cpu(cpu_data, cpuid);

		cpu_info->loops_per_jiffy = loops_per_jiffy;
		cpu_info->cpuid = read_cpuid_id();

		store_cpu_topology(cpuid);
		}