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

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>

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 7a10661..441eda1 100644 (file)
--- a/arch/arm/Kconfig
+++ b/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"

diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 4bcd2d6..3b82b36 100644 (file)
--- a/arch/arm/Makefile
+++ b/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
 

diff --git a/arch/arm/mach-virt/Kconfig b/arch/arm/mach-virt/Kconfig
new file mode 100644 (file)
index 0000000..8958f0d
--- /dev/null
+++ b/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

diff --git a/arch/arm/mach-virt/Makefile b/arch/arm/mach-virt/Makefile
new file mode 100644 (file)
index 0000000..042afc1
--- /dev/null
+++ b/arch/arm/mach-virt/Makefile
@@ -0,0 +1,6 @@
+#
+# Makefile for the linux kernel.
+#
+
+obj-y                                  := virt.o
+obj-$(CONFIG_SMP)                      += platsmp.o

diff --git a/arch/arm/mach-virt/platsmp.c b/arch/arm/mach-virt/platsmp.c
new file mode 100644 (file)
index 0000000..8badaab
--- /dev/null
+++ b/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,
+};

diff --git a/arch/arm/mach-virt/virt.c b/arch/arm/mach-virt/virt.c
new file mode 100644 (file)
index 0000000..f6ed9cf
--- /dev/null
+++ b/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