diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig index f6b93a35ce14..7a78b88c0f1a 100644 --- a/arch/x86/kvm/Kconfig +++ b/arch/x86/kvm/Kconfig @@ -46,6 +46,7 @@ config KVM select KVM_GENERIC_DIRTYLOG_READ_PROTECT select KVM_VFIO select SRCU + select HAVE_KVM_PM_NOTIFIER if PM help Support hosting fully virtualized guest machines using hardware virtualization extensions. You will need a fairly recent diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index d1fdbaa6e1a9..3c5a33ab10c0 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -58,6 +58,7 @@ #include #include #include +#include #include @@ -5701,6 +5702,41 @@ static int kvm_vm_ioctl_set_msr_filter(struct kvm *kvm, void __user *argp) return 0; } +#ifdef CONFIG_HAVE_KVM_PM_NOTIFIER +static int kvm_arch_suspend_notifier(struct kvm *kvm) +{ + struct kvm_vcpu *vcpu; + int i, ret = 0; + + mutex_lock(&kvm->lock); + kvm_for_each_vcpu(i, vcpu, kvm) { + if (!vcpu->arch.pv_time_enabled) + continue; + + ret = kvm_set_guest_paused(vcpu); + if (ret) { + kvm_err("Failed to pause guest VCPU%d: %d\n", + vcpu->vcpu_id, ret); + break; + } + } + mutex_unlock(&kvm->lock); + + return ret ? NOTIFY_BAD : NOTIFY_DONE; +} + +int kvm_arch_pm_notifier(struct kvm *kvm, unsigned long state) +{ + switch (state) { + case PM_HIBERNATION_PREPARE: + case PM_SUSPEND_PREPARE: + return kvm_arch_suspend_notifier(kvm); + } + + return NOTIFY_DONE; +} +#endif /* CONFIG_HAVE_KVM_PM_NOTIFIER */ + long kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) {