diff --git a/arch/arm64/include/asm/smp.h b/arch/arm64/include/asm/smp.h index b1f68c19d170301bf16e135437346e279422b3a0..4b8023c5d14619d23b329cd169b226f412a0e6c3 100644 --- a/arch/arm64/include/asm/smp.h +++ b/arch/arm64/include/asm/smp.h @@ -75,5 +75,6 @@ struct smp_enable_ops { }; extern const struct smp_enable_ops smp_spin_table_ops; +extern const struct smp_enable_ops smp_psci_ops; #endif /* ifndef __ASM_SMP_H */ diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile index 75a90c15b30bbc8cdc47dbb786fd75f23ac8b8c4..7b4b564961d48c4be4fa0df2e1e7ad49c7a57224 100644 --- a/arch/arm64/kernel/Makefile +++ b/arch/arm64/kernel/Makefile @@ -14,7 +14,7 @@ arm64-obj-y := cputable.o debug-monitors.o entry.o irq.o fpsimd.o \ arm64-obj-$(CONFIG_COMPAT) += sys32.o kuser32.o signal32.o \ sys_compat.o arm64-obj-$(CONFIG_MODULES) += arm64ksyms.o module.o -arm64-obj-$(CONFIG_SMP) += smp.o smp_spin_table.o +arm64-obj-$(CONFIG_SMP) += smp.o smp_spin_table.o smp_psci.o arm64-obj-$(CONFIG_HW_PERF_EVENTS) += perf_event.o arm64-obj-$(CONFIG_HAVE_HW_BREAKPOINT)+= hw_breakpoint.o arm64-obj-$(CONFIG_EARLY_PRINTK) += early_printk.o diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index 7776922945afef77e0c47d9a7e893fc4f86c176d..bdd34597254bb7a5f08d91b6e09df1f86adfcbb6 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -236,6 +236,7 @@ static void (*smp_cross_call)(const struct cpumask *, unsigned int); static const struct smp_enable_ops *enable_ops[] __initconst = { &smp_spin_table_ops, + &smp_psci_ops, NULL, }; diff --git a/arch/arm64/kernel/smp_psci.c b/arch/arm64/kernel/smp_psci.c new file mode 100644 index 0000000000000000000000000000000000000000..112091684c2290889f72c5a7151b9e5ed30ffcec --- /dev/null +++ b/arch/arm64/kernel/smp_psci.c @@ -0,0 +1,52 @@ +/* + * PSCI SMP initialisation + * + * Copyright (C) 2013 ARM Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include +#include + +#include + +static int __init smp_psci_init_cpu(struct device_node *dn, int cpu) +{ + return 0; +} + +static int __init smp_psci_prepare_cpu(int cpu) +{ + int err; + + if (!psci_ops.cpu_on) { + pr_err("psci: no cpu_on method, not booting CPU%d\n", cpu); + return -ENODEV; + } + + err = psci_ops.cpu_on(cpu, __pa(secondary_holding_pen)); + if (err) { + pr_err("psci: failed to boot CPU%d (%d)\n", cpu, err); + return err; + } + + return 0; +} + +const struct smp_enable_ops smp_psci_ops __initconst = { + .name = "psci", + .init_cpu = smp_psci_init_cpu, + .prepare_cpu = smp_psci_prepare_cpu, +};