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kvm: add PM-notifier

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Add KVM PM-notifier so that architectures can have arch-specific
VM suspend/resume routines. Such architectures need to select
CONFIG_HAVE_KVM_PM_NOTIFIER and implement kvm_arch_pm_notifier().

Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Acked-by: Marc Zyngier <maz@kernel.org>
Message-Id: <20210606021045.14159-1-senozhatsky@chromium.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sergey Senozhatsky 2021-06-06 11:10:44 +09:00 • committed by Paolo Bonzini
parent 768d134d8c
commit 2fdef3a2ae
3 changed files with 47 additions and 0 deletions
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9
include/linux/kvm_host.h
View file

@ -28,6 +28,7 @@
#include <linux/rcuwait.h>
#include <linux/refcount.h>
#include <linux/nospec.h>
#include <linux/notifier.h>
#include <asm/signal.h>
#include <linux/kvm.h>
@ -594,6 +595,10 @@ struct kvm {
pid_t userspace_pid;
unsigned int max_halt_poll_ns;
u32 dirty_ring_size;
#ifdef CONFIG_HAVE_KVM_PM_NOTIFIER
struct notifier_block pm_notifier;
#endif
};
#define kvm_err(fmt, ...) \
@ -1007,6 +1012,10 @@ int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu);
void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu);
void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
#ifdef CONFIG_HAVE_KVM_PM_NOTIFIER
int kvm_arch_pm_notifier(struct kvm *kvm, unsigned long state);
#endif
#ifdef __KVM_HAVE_ARCH_VCPU_DEBUGFS
void kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu, struct dentry *debugfs_dentry);
#endif