Add the necessary callbacks to suspend and resume a host running kvm. This
is just a repeat of the cpu hotplug/unplug work.
Signed-off-by: Avi Kivity <[email protected]>
Index: linux-2.6/drivers/kvm/kvm_main.c
===================================================================
--- linux-2.6.orig/drivers/kvm/kvm_main.c
+++ linux-2.6/drivers/kvm/kvm_main.c
@@ -34,6 +34,7 @@
#include <linux/highmem.h>
#include <linux/file.h>
#include <asm/desc.h>
+#include <linux/sysdev.h>
#include <linux/cpu.h>
#include "x86_emulate.h"
@@ -2116,6 +2117,30 @@ static void kvm_exit_debug(void)
debugfs_remove(debugfs_dir);
}
+static int kvm_suspend(struct sys_device *dev, pm_message_t state)
+{
+ decache_vcpus_on_cpu(raw_smp_processor_id());
+ on_each_cpu(kvm_arch_ops->hardware_disable, 0, 0, 1);
+ return 0;
+}
+
+static int kvm_resume(struct sys_device *dev)
+{
+ on_each_cpu(kvm_arch_ops->hardware_enable, 0, 0, 1);
+ return 0;
+}
+
+static struct sysdev_class kvm_sysdev_class = {
+ set_kset_name("kvm"),
+ .suspend = kvm_suspend,
+ .resume = kvm_resume,
+};
+
+static struct sys_device kvm_sysdev = {
+ .id = 0,
+ .cls = &kvm_sysdev_class,
+};
+
hpa_t bad_page_address;
int kvm_init_arch(struct kvm_arch_ops *ops, struct module *module)
@@ -2148,6 +2173,14 @@ int kvm_init_arch(struct kvm_arch_ops *o
goto out_free_1;
register_reboot_notifier(&kvm_reboot_notifier);
+ r = sysdev_class_register(&kvm_sysdev_class);
+ if (r)
+ goto out_free_2;
+
+ r = sysdev_register(&kvm_sysdev);
+ if (r)
+ goto out_free_3;
+
kvm_chardev_ops.owner = module;
r = misc_register(&kvm_dev);
@@ -2159,6 +2192,10 @@ int kvm_init_arch(struct kvm_arch_ops *o
return r;
out_free:
+ sysdev_unregister(&kvm_sysdev);
+out_free_3:
+ sysdev_class_unregister(&kvm_sysdev_class);
+out_free_2:
unregister_reboot_notifier(&kvm_reboot_notifier);
unregister_cpu_notifier(&kvm_cpu_notifier);
out_free_1:
@@ -2170,8 +2207,10 @@ out_free_1:
void kvm_exit_arch(void)
{
misc_deregister(&kvm_dev);
-
+ sysdev_unregister(&kvm_sysdev);
+ sysdev_class_unregister(&kvm_sysdev_class);
unregister_reboot_notifier(&kvm_reboot_notifier);
+ unregister_cpu_notifier(&kvm_cpu_notifier);
on_each_cpu(kvm_arch_ops->hardware_disable, 0, 0, 1);
kvm_arch_ops->hardware_unsetup();
kvm_arch_ops = NULL;
-
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