[PATCH] ARM: tango: add HOTPLUG_CPU support
From: Mason <hidden>
Date: 2016-06-15 15:19:47
Also in:
linux-pm
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
From: Marc Gonzalez <redacted> cpu_die() and cpu_kill() are implemented in firmware. Signed-off-by: Marc Gonzalez <redacted> --- arch/arm/mach-tango/platsmp.c | 17 +++++++++++++++++ arch/arm/mach-tango/smc.h | 4 +++- 2 files changed, 20 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-tango/platsmp.c b/arch/arm/mach-tango/platsmp.c
index a21f55e000d2..ff495f6b6f40 100644
--- a/arch/arm/mach-tango/platsmp.c
+++ b/arch/arm/mach-tango/platsmp.c@@ -9,8 +9,25 @@ static int tango_boot_secondary(unsigned int cpu, struct task_struct *idle) return 0; } +#ifdef CONFIG_HOTPLUG_CPU +static int tango_cpu_kill(unsigned int cpu) +{ + return tango_aux_core_kill(cpu); +} + +static void tango_cpu_die(unsigned int cpu) +{ + tango_aux_core_die(cpu); +} +#else +#define tango_cpu_kill NULL +#define tango_cpu_die NULL +#endif + static const struct smp_operations tango_smp_ops __initconst = { .smp_boot_secondary = tango_boot_secondary, + .cpu_kill = tango_cpu_kill, + .cpu_die = tango_cpu_die, }; CPU_METHOD_OF_DECLARE(tango4_smp, "sigma,tango4-smp", &tango_smp_ops);
diff --git a/arch/arm/mach-tango/smc.h b/arch/arm/mach-tango/smc.h
index 7a4af35cc390..3d31f984f44c 100644
--- a/arch/arm/mach-tango/smc.h
+++ b/arch/arm/mach-tango/smc.h@@ -2,4 +2,6 @@ extern int tango_smc(unsigned int val, unsigned int service); #define tango_set_l2_control(val) tango_smc(val, 0x102) #define tango_start_aux_core(val) tango_smc(val, 0x104) -#define tango_set_aux_boot_addr(val) tango_smc((unsigned int)val, 0x105) +#define tango_set_aux_boot_addr(val) tango_smc(val, 0x105) +#define tango_aux_core_die(val) tango_smc(val, 0x121) +#define tango_aux_core_kill(val) tango_smc(val, 0x122)
--
2.8.2