diff options
| author | Will Deacon <will.deacon@arm.com> | 2013-11-05 18:10:47 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2014-05-16 16:38:55 +0100 |
| commit | edf0cf19ba3b6c750871b391c5edcb679c02daad (patch) | |
| tree | 76c177c3b50d3f9540c005cf17e9ba7295ac50f4 /arch/arm64/kernel/smp.c | |
| parent | 6b8b8223b534f121c546d3f9d1605ee75fac1f85 (diff) | |
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>
(cherry picked from commit 7158627686f02319c50c8d9d78f75d4c8d126ff2)
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'arch/arm64/kernel/smp.c')
| -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 53ed158ec31c..08030da7f3c2 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -122,8 +122,6 @@ asmlinkage void __cpuinit 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 __cpuinit 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. @@ -274,6 +275,7 @@ 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); |