diff options
Diffstat (limited to 'arch/arm/mach-socfpga/platsmp.c')
| -rw-r--r-- | arch/arm/mach-socfpga/platsmp.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm/mach-socfpga/platsmp.c b/arch/arm/mach-socfpga/platsmp.c index c6f1df89f9af..15c8ce8965f4 100644 --- a/arch/arm/mach-socfpga/platsmp.c +++ b/arch/arm/mach-socfpga/platsmp.c @@ -106,11 +106,23 @@ static void socfpga_cpu_die(unsigned int cpu) cpu_do_idle(); } +/* + * We need a dummy function so that platform_can_cpu_hotplug() knows + * we support CPU hotplug. However, the function does not need to do + * anything, because CPUs going offline just do WFI. We could reset + * the CPUs but it would increase power consumption. + */ +static int socfpga_cpu_kill(unsigned int cpu) +{ + return 1; +} + static struct smp_operations socfpga_smp_ops __initdata = { .smp_prepare_cpus = socfpga_smp_prepare_cpus, .smp_boot_secondary = socfpga_boot_secondary, #ifdef CONFIG_HOTPLUG_CPU .cpu_die = socfpga_cpu_die, + .cpu_kill = socfpga_cpu_kill, #endif }; @@ -119,6 +131,7 @@ static struct smp_operations socfpga_a10_smp_ops __initdata = { .smp_boot_secondary = socfpga_a10_boot_secondary, #ifdef CONFIG_HOTPLUG_CPU .cpu_die = socfpga_cpu_die, + .cpu_kill = socfpga_cpu_kill, #endif }; |