[PATCH v3 1/5] ARM: kernel: smp_setup_processor_id() updates
From: Nicolas Pitre <hidden>
Date: 2012-11-19 03:08:20
Also in:
linux-devicetree
On Thu, 15 Nov 2012, Lorenzo Pieralisi wrote:
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: Lorenzo Pieralisi <redacted>
Acked-by: Nicolas Pitre <redacted>
quoted hunk
--- arch/arm/kernel/setup.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index da1d1aa..d0df6c8 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c@@ -426,13 +426,14 @@ int __cpu_logical_map[NR_CPUS]; void __init smp_setup_processor_id(void) { int i; - u32 cpu = is_smp() ? read_cpuid_mpidr() & 0xff : 0; + u32 mpidr = is_smp() ? read_cpuid_mpidr() & 0xffffff : 0; + u32 cpu = mpidr & 0xff; 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; - 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)-- 1.7.12