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[PATCH] KVM: Host suspend/resume support

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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 <avi@qumranet.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Avi Kivity 2007-02-12 00:54:48 -08:00 committed by Linus Torvalds
parent 774c47f1d7
commit 59ae6c6b87
1 changed files with 40 additions and 1 deletions
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41
drivers/kvm/kvm_main.c
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@ -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"
@ -2117,6 +2118,30 @@ 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)
@ -2149,6 +2174,14 @@ int kvm_init_arch(struct kvm_arch_ops *ops, struct module *module)
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);
@ -2160,6 +2193,10 @@ int kvm_init_arch(struct kvm_arch_ops *ops, struct module *module)
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:
@ -2171,8 +2208,10 @@ int kvm_init_arch(struct kvm_arch_ops *ops, struct module *module)
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, NULL, 0, 1);
kvm_arch_ops->hardware_unsetup();
kvm_arch_ops = NULL;