Messages in this thread Patch in this message | | | Subject | [PATCH 5/5] KVM: Host suspend/resume support | From | Avi Kivity <> | Date | Tue, 30 Jan 2007 14:57:17 -0000 |
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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>
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; - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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