From mboxrd@z Thu Jan 1 00:00:00 1970 From: lorenzo.pieralisi@arm.com (Lorenzo Pieralisi) Date: Mon, 19 Nov 2012 12:45:02 +0000 Subject: [PATCH v4 3/7] ARM: kernel: smp_setup_processor_id() updates In-Reply-To: <1353329106-24084-1-git-send-email-lorenzo.pieralisi@arm.com> References: <1353329106-24084-1-git-send-email-lorenzo.pieralisi@arm.com> Message-ID: <1353329106-24084-4-git-send-email-lorenzo.pieralisi@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 Acked-by: Nicolas Pitre --- 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..4515bf6 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() & MPIDR_HWID_BITMASK : 0; + u32 cpu = MPIDR_AFFINITY_LEVEL(mpidr, 0); 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