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| author |   Mark Rutland <mark.rutland@arm.com> | 2013-10-24 20:30:18 +0100 |
|---|---|---|
| committer |   Catalin Marinas <catalin.marinas@arm.com> | 2013-10-25 11:33:21 +0100 |
| commit | 9327e2c6bb8cb0131b38a07847cd58c78dc095e9 (patch) | |
| tree | a326739547f5521d1c1b2d228081f52466609e6c /arch/arm64/include | |
| parent | arm64: read enable-method for CPU0 (diff) | |
| download | linux-dev-9327e2c6bb8cb0131b38a07847cd58c78dc095e9.tar.xz linux-dev-9327e2c6bb8cb0131b38a07847cd58c78dc095e9.zip | |
arm64: add CPU_HOTPLUG infrastructure
This patch adds the basic infrastructure necessary to support
CPU_HOTPLUG on arm64, based on the arm implementation. Actual hotplug
support will depend on an implementation's cpu_operations (e.g. PSCI).
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include')
| -rw-r--r-- | arch/arm64/include/asm/cpu_ops.h | 9 | ||||
| -rw-r--r-- | arch/arm64/include/asm/irq.h | 1 | ||||
| -rw-r--r-- | arch/arm64/include/asm/smp.h | 5 |
3 files changed, 15 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/cpu_ops.h b/arch/arm64/include/asm/cpu_ops.h index 1a98dbfc4a5f..c4cdb5e5b73d 100644 --- a/arch/arm64/include/asm/cpu_ops.h +++ b/arch/arm64/include/asm/cpu_ops.h @@ -34,6 +34,11 @@ struct device_node; * @cpu_boot: Boots a cpu into the kernel. * @cpu_postboot: Optionally, perform any post-boot cleanup or necesary * synchronisation. Called from the cpu being booted. + * @cpu_disable: Prepares a cpu to die. May fail for some mechanism-specific + * reason, which will cause the hot unplug to be aborted. Called + * from the cpu to be killed. + * @cpu_die: Makes a cpu leave the kernel. Must not fail. Called from the + * cpu being killed. */ struct cpu_operations { const char *name; @@ -41,6 +46,10 @@ struct cpu_operations { int (*cpu_prepare)(unsigned int); int (*cpu_boot)(unsigned int); void (*cpu_postboot)(void); +#ifdef CONFIG_HOTPLUG_CPU + int (*cpu_disable)(unsigned int cpu); + void (*cpu_die)(unsigned int cpu); +#endif }; extern const struct cpu_operations *cpu_ops[NR_CPUS]; diff --git a/arch/arm64/include/asm/irq.h b/arch/arm64/include/asm/irq.h index 0332fc077f6e..e1f7ecdde11f 100644 --- a/arch/arm64/include/asm/irq.h +++ b/arch/arm64/include/asm/irq.h @@ -4,6 +4,7 @@ #include <asm-generic/irq.h> extern void (*handle_arch_irq)(struct pt_regs *); +extern void migrate_irqs(void); extern void set_handle_irq(void (*handle_irq)(struct pt_regs *)); #endif diff --git a/arch/arm64/include/asm/smp.h b/arch/arm64/include/asm/smp.h index d64187ce69a2..a498f2cd2c2a 100644 --- a/arch/arm64/include/asm/smp.h +++ b/arch/arm64/include/asm/smp.h @@ -65,4 +65,9 @@ extern void secondary_entry(void); extern void arch_send_call_function_single_ipi(int cpu); extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); +extern int __cpu_disable(void); + +extern void __cpu_die(unsigned int cpu); +extern void cpu_die(void); + #endif /* ifndef __ASM_SMP_H */ |