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Commit 0459ca9b authored by Marc Zyngier's avatar Marc Zyngier Committed by Catalin Marinas
Browse files

arm64: SMP: enable PSCI boot method 



Wire the PSCI implementation into the SMP secondary startup
code.

Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent e790f1de

arch/arm64/include/asm/smp.h

+1 −0
Original line number Diff line number Diff line
@@ -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 */

arch/arm64/kernel/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -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

arch/arm64/kernel/smp.c

+1 −0
Original line number Diff line number Diff line
@@ -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,

};

arch/arm64/kernel/smp_psci.c

0 → 100644
+52 −0
Original line number Diff line number Diff line 
/*

 * 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,

};