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Diffstat (limited to 'kvm-all.c')
-rw-r--r--kvm-all.c57
1 files changed, 56 insertions, 1 deletions
diff --git a/kvm-all.c b/kvm-all.c
index e56f385278..d317dcb33e 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -61,6 +61,12 @@
#define KVM_MSI_HASHTAB_SIZE 256
+struct KVMParkedVcpu {
+ unsigned long vcpu_id;
+ int kvm_fd;
+ QLIST_ENTRY(KVMParkedVcpu) node;
+};
+
struct KVMState
{
AccelState parent_obj;
@@ -94,6 +100,7 @@ struct KVMState
QTAILQ_HEAD(msi_hashtab, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE];
#endif
KVMMemoryListener memory_listener;
+ QLIST_HEAD(, KVMParkedVcpu) kvm_parked_vcpus;
};
KVMState *kvm_state;
@@ -237,6 +244,53 @@ static int kvm_set_user_memory_region(KVMMemoryListener *kml, KVMSlot *slot)
return kvm_vm_ioctl(s, KVM_SET_USER_MEMORY_REGION, &mem);
}
+int kvm_destroy_vcpu(CPUState *cpu)
+{
+ KVMState *s = kvm_state;
+ long mmap_size;
+ struct KVMParkedVcpu *vcpu = NULL;
+ int ret = 0;
+
+ DPRINTF("kvm_destroy_vcpu\n");
+
+ mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0);
+ if (mmap_size < 0) {
+ ret = mmap_size;
+ DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n");
+ goto err;
+ }
+
+ ret = munmap(cpu->kvm_run, mmap_size);
+ if (ret < 0) {
+ goto err;
+ }
+
+ vcpu = g_malloc0(sizeof(*vcpu));
+ vcpu->vcpu_id = kvm_arch_vcpu_id(cpu);
+ vcpu->kvm_fd = cpu->kvm_fd;
+ QLIST_INSERT_HEAD(&kvm_state->kvm_parked_vcpus, vcpu, node);
+err:
+ return ret;
+}
+
+static int kvm_get_vcpu(KVMState *s, unsigned long vcpu_id)
+{
+ struct KVMParkedVcpu *cpu;
+
+ QLIST_FOREACH(cpu, &s->kvm_parked_vcpus, node) {
+ if (cpu->vcpu_id == vcpu_id) {
+ int kvm_fd;
+
+ QLIST_REMOVE(cpu, node);
+ kvm_fd = cpu->kvm_fd;
+ g_free(cpu);
+ return kvm_fd;
+ }
+ }
+
+ return kvm_vm_ioctl(s, KVM_CREATE_VCPU, (void *)vcpu_id);
+}
+
int kvm_init_vcpu(CPUState *cpu)
{
KVMState *s = kvm_state;
@@ -245,7 +299,7 @@ int kvm_init_vcpu(CPUState *cpu)
DPRINTF("kvm_init_vcpu\n");
- ret = kvm_vm_ioctl(s, KVM_CREATE_VCPU, (void *)kvm_arch_vcpu_id(cpu));
+ ret = kvm_get_vcpu(s, kvm_arch_vcpu_id(cpu));
if (ret < 0) {
DPRINTF("kvm_create_vcpu failed\n");
goto err;
@@ -1501,6 +1555,7 @@ static int kvm_init(MachineState *ms)
#ifdef KVM_CAP_SET_GUEST_DEBUG
QTAILQ_INIT(&s->kvm_sw_breakpoints);
#endif
+ QLIST_INIT(&s->kvm_parked_vcpus);
s->vmfd = -1;
s->fd = qemu_open("/dev/kvm", O_RDWR);
if (s->fd == -1) {