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authorIzik Eidus <izike@qumranet.com>2008-03-30 16:01:25 +0300
committerAvi Kivity <avi@qumranet.com>2008-04-27 12:00:56 +0300
commitd39f13b0da7fa7f705fbe6c80995205d0380bc7a (patch)
treefebc1458c6225c70ca4c435047acf279fd77b019 /include/linux
parent9c20456a32ce9e82ccda55e12c10016b181d85e5 (diff)
KVM: add vm refcounting
the main purpose of adding this functions is the abilaty to release the spinlock that protect the kvm list while still be able to do operations on a specific kvm in a safe way. Signed-off-by: Izik Eidus <izike@qumranet.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/kvm_host.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index f4e143621e3..a2ceb51b427 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -114,6 +114,7 @@ struct kvm {
struct kvm_io_bus pio_bus;
struct kvm_vm_stat stat;
struct kvm_arch arch;
+ atomic_t users_count;
};
/* The guest did something we don't support. */
@@ -140,6 +141,9 @@ int kvm_init(void *opaque, unsigned int vcpu_size,
struct module *module);
void kvm_exit(void);
+void kvm_get_kvm(struct kvm *kvm);
+void kvm_put_kvm(struct kvm *kvm);
+
#define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
#define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }