diff options
| author | Avi Kivity <avi@qumranet.com> | 2007-02-12 00:54:48 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-12 09:48:41 -0800 |
| commit | 59ae6c6b87711ceb2d1ea5f9e08bb13aee947a29 (patch) | |
| tree | d754abbd343f2a4f3707ea862062095bcf6e61f5 /drivers/kvm | |
| parent | 774c47f1d78e373a6bd2964f4e278d1ce26c21cb (diff) | |
[PATCH] KVM: Host suspend/resume support
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>
Diffstat (limited to 'drivers/kvm')
| -rw-r--r-- | drivers/kvm/kvm_main.c | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index 291d298868fc..af866147ff25 100644 --- a/drivers/kvm/kvm_main.c +++ b/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" @@ -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 @@ 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, NULL, 0, 1); kvm_arch_ops->hardware_unsetup(); kvm_arch_ops = NULL; |