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arm64: SMP: enable PSCI boot method

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Wire the PSCI implementation into the SMP secondary startup
code.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Marc Zyngier 2013-01-02 15:34:50 +00:00 committed by Catalin Marinas
parent e790f1deb2
commit 0459ca9b7a
4 changed files with 55 additions and 1 deletions
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1
arch/arm64/include/asm/smp.h
View File

@ -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 */

2
arch/arm64/kernel/Makefile
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@ -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

1
arch/arm64/kernel/smp.c
View File

@ -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,
};

52
arch/arm64/kernel/smp_psci.c Normal file
View File

@ -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 <http://www.gnu.org/licenses/>.
*/
#include <linux/init.h>
#include <linux/of.h>
#include <linux/smp.h>
#include <asm/psci.h>
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,
};