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Merge branch 'for-arm-soc/virt/mach' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into next/virt

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From Will Deacon, this lays the foundation for a basic virtualzed machine type.

* 'for-arm-soc/virt/mach' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux:
  ARM: mach-virt: add SMP support using PSCI
  ARM: Dummy Virtual Machine platform support

Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Olof Johansson 2013-02-11 09:21:51 -08:00
commit 28e783aacb
6 changed files with 135 additions and 0 deletions
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2
arch/arm/Kconfig
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@ -1128,6 +1128,8 @@ source "arch/arm/mach-versatile/Kconfig"
source "arch/arm/mach-vexpress/Kconfig"
source "arch/arm/plat-versatile/Kconfig"
source "arch/arm/mach-virt/Kconfig"
source "arch/arm/mach-vt8500/Kconfig"
source "arch/arm/mach-w90x900/Kconfig"

1
arch/arm/Makefile
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@ -194,6 +194,7 @@ machine-$(CONFIG_ARCH_SOCFPGA) += socfpga
machine-$(CONFIG_ARCH_SPEAR13XX) += spear13xx
machine-$(CONFIG_ARCH_SPEAR3XX) += spear3xx
machine-$(CONFIG_MACH_SPEAR600) += spear6xx
machine-$(CONFIG_ARCH_VIRT) += virt
machine-$(CONFIG_ARCH_ZYNQ) += zynq
machine-$(CONFIG_ARCH_SUNXI) += sunxi

10
arch/arm/mach-virt/Kconfig Normal file
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@ -0,0 +1,10 @@
config ARCH_VIRT
bool "Dummy Virtual Machine" if ARCH_MULTI_V7
select ARCH_WANT_OPTIONAL_GPIOLIB
select ARM_GIC
select ARM_ARCH_TIMER
select ARM_PSCI
select HAVE_SMP
select CPU_V7
select SPARSE_IRQ
select USE_OF

6
arch/arm/mach-virt/Makefile Normal file
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@ -0,0 +1,6 @@
#
# Makefile for the linux kernel.
#
obj-y := virt.o
obj-$(CONFIG_SMP) += platsmp.o

58
arch/arm/mach-virt/platsmp.c Normal file
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@ -0,0 +1,58 @@
/*
* Dummy Virtual Machine - does what it says on the tin.
*
* Copyright (C) 2012 ARM Ltd
* Author: Will Deacon <will.deacon@arm.com>
*
* 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/smp.h>
#include <linux/of.h>
#include <linux/irqchip/arm-gic.h>
#include <asm/psci.h>
#include <asm/smp_plat.h>
extern void secondary_startup(void);
static void __init virt_smp_init_cpus(void)
{
}
static void __init virt_smp_prepare_cpus(unsigned int max_cpus)
{
}
static int __cpuinit virt_boot_secondary(unsigned int cpu,
struct task_struct *idle)
{
if (psci_ops.cpu_on)
return psci_ops.cpu_on(cpu_logical_map(cpu),
__pa(secondary_startup));
return -ENODEV;
}
static void __cpuinit virt_secondary_init(unsigned int cpu)
{
gic_secondary_init(0);
}
struct smp_operations __initdata virt_smp_ops = {
.smp_init_cpus = virt_smp_init_cpus,
.smp_prepare_cpus = virt_smp_prepare_cpus,
.smp_secondary_init = virt_secondary_init,
.smp_boot_secondary = virt_boot_secondary,
};

58
arch/arm/mach-virt/virt.c Normal file
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@ -0,0 +1,58 @@
/*
* Dummy Virtual Machine - does what it says on the tin.
*
* Copyright (C) 2012 ARM Ltd
* Authors: Will Deacon <will.deacon@arm.com>,
* Marc Zyngier <marc.zyngier@arm.com>
*
* 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/irqchip.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/smp.h>
#include <asm/arch_timer.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
static void __init virt_init(void)
{
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
}
static void __init virt_timer_init(void)
{
WARN_ON(arch_timer_of_register() != 0);
WARN_ON(arch_timer_sched_clock_init() != 0);
}
static const char *virt_dt_match[] = {
"linux,dummy-virt",
NULL
};
static struct sys_timer virt_timer = {
.init = virt_timer_init,
};
extern struct smp_operations virt_smp_ops;
DT_MACHINE_START(VIRT, "Dummy Virtual Machine")
.init_irq = irqchip_init,
.timer = &virt_timer,
.init_machine = virt_init,
.smp = smp_ops(virt_smp_ops),
.dt_compat = virt_dt_match,
MACHINE_END