@@ -109,6 +109,9 @@ static const char __initconst warning_hvm_fep[] =
static bool_t __initdata opt_altp2m_enabled = 0;
boolean_param("altp2m", opt_altp2m_enabled);
+/* Total number of HVM vCPUs on this system */
+atomic_t num_hvm_vcpus;
+
static int cpu_callback(
struct notifier_block *nfb, unsigned long action, void *hcpu)
{
@@ -1511,6 +1514,7 @@ int hvm_vcpu_initialise(struct vcpu *v)
hvm_update_guest_vendor(v);
+ atomic_inc(&num_hvm_vcpus);
return 0;
fail6:
@@ -1529,6 +1533,8 @@ int hvm_vcpu_initialise(struct vcpu *v)
void hvm_vcpu_destroy(struct vcpu *v)
{
+ atomic_dec(&num_hvm_vcpus);
+
viridian_vcpu_deinit(v);
hvm_all_ioreq_servers_remove_vcpu(v->domain, v);
@@ -25,6 +25,7 @@
#include <asm/hvm/asid.h>
#include <public/domctl.h>
#include <public/hvm/save.h>
+#include <xen/atomic.h>
#include <xen/mm.h>
#ifdef CONFIG_HVM_FEP
@@ -233,6 +234,8 @@ extern bool_t hvm_enabled;
extern bool_t cpu_has_lmsl;
extern s8 hvm_port80_allowed;
+extern atomic_t num_hvm_vcpus;
+
extern const struct hvm_function_table *start_svm(void);
extern const struct hvm_function_table *start_vmx(void);