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| author |   Will Deacon <will.deacon@arm.com> | 2013-11-05 18:10:47 +0000 |
|---|---|---|
| committer |   Catalin Marinas <catalin.marinas@arm.com> | 2013-12-19 17:43:06 +0000 |
| commit | 7158627686f02319c50c8d9d78f75d4c8d126ff2 (patch) | |
| tree | 3b4d781bd966f07cad1b67b137f0ff8b89430e9a /arch/arm64/kernel/smp.c | |
| parent | arm64: perf: add support for percpu pmu interrupt (diff) | |
| download | linux-dev-7158627686f02319c50c8d9d78f75d4c8d126ff2.tar.xz linux-dev-7158627686f02319c50c8d9d78f75d4c8d126ff2.zip | |
arm64: percpu: implement optimised pcpu access using tpidr_el1
This patch implements optimised percpu variable accesses using the
el1 r/w thread register (tpidr_el1) along the same lines as arch/arm/.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to '')
| -rw-r--r-- | arch/arm64/kernel/smp.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index a0c2ca602cf8..b5d2031c12c6 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -122,8 +122,6 @@ asmlinkage void secondary_start_kernel(void) struct mm_struct *mm = &init_mm; unsigned int cpu = smp_processor_id(); - printk("CPU%u: Booted secondary processor\n", cpu); - /* * All kernel threads share the same mm context; grab a * reference and switch to it. @@ -132,6 +130,9 @@ asmlinkage void secondary_start_kernel(void) current->active_mm = mm; cpumask_set_cpu(cpu, mm_cpumask(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 * point to zero page to avoid speculatively fetching new entries. @@ -271,6 +272,7 @@ void __init smp_cpus_done(unsigned int max_cpus) void __init smp_prepare_boot_cpu(void) { + set_my_cpu_offset(per_cpu_offset(smp_processor_id())); } static void (*smp_cross_call)(const struct cpumask *, unsigned int); |