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authorLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2012-11-06 11:57:43 +0000
committerLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2012-11-19 14:51:11 +0000
commite8d432c9cf0a3d569b2d00877d12c9ffe9e55286 (patch)
treef85738a005ec0368adedfaf2600acd68ebf68c22 /arch/arm/kernel/smp.c
parent77b67063bb6bce6d475e910d3b886a606d0d91f7 (diff)
downloadvexpress-lsk-e8d432c9cf0a3d569b2d00877d12c9ffe9e55286.tar.gz
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>
Diffstat (limited to 'arch/arm/kernel/smp.c')
-rw-r--r--arch/arm/kernel/smp.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index fbc8b2623d8..7eacd84cdc9 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -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);
}