Merge branch 'for-arm-soc/virt/mach' of git://git.kernel.org/pub/scm/…

…linux/kernel/git/will/linux into next/virt

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>

arch/arm/Kconfig

@@ -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"

arch/arm/Makefile

@@ -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
 

arch/arm/mach-virt/Kconfig

@@ -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

arch/arm/mach-virt/Makefile

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

arch/arm/mach-virt/platsmp.c

@@ -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,
+};

arch/arm/mach-virt/virt.c

@@ -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