[RFC PATCH 13/19] accel/kvm: Declare and allocate AccelvCPUState struct

[Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>]

In preparation of moving KVM-specific fields from CPUState
to the accelerator-specific AccelvCPUState structure, first
declare it empty and allocate it. This will make the following
commits easier to review.

Signed-off-by: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>
---
 include/sysemu/kvm_int.h | 3 +++
 accel/kvm/kvm-all.c      | 5 +++++
 target/s390x/kvm.c       | 2 +-
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/include/sysemu/kvm_int.h b/include/sysemu/kvm_int.h
index ccb8869f01b..f57be10adde 100644
--- a/include/sysemu/kvm_int.h
+++ b/include/sysemu/kvm_int.h
@@ -13,6 +13,9 @@
 #include "qemu/accel.h"
 #include "sysemu/kvm.h"
 
+struct AccelvCPUState {
+};
+
 typedef struct KVMSlot
 {
     hwaddr start_addr;
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 8259e89bbaf..4ccd12ea56a 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -399,6 +399,7 @@ void kvm_destroy_vcpu(CPUState *cpu)
         error_report("kvm_destroy_vcpu failed");
         exit(EXIT_FAILURE);
     }
+    g_free(cpu->accel_vcpu);
 }
 
 static int kvm_get_vcpu(KVMState *s, unsigned long vcpu_id)
@@ -434,6 +435,7 @@ int kvm_init_vcpu(CPUState *cpu, Error **errp)
         goto err;
     }
 
+    cpu->accel_vcpu = g_new(struct AccelvCPUState, 1);
     cpu->kvm_fd = ret;
     cpu->kvm_state = s;
     cpu->vcpu_dirty = true;
@@ -468,6 +470,9 @@ int kvm_init_vcpu(CPUState *cpu, Error **errp)
                          kvm_arch_vcpu_id(cpu));
     }
 err:
+    if (ret < 0) {
+        g_free(cpu->accel_vcpu);
+    }
     return ret;
 }
 
diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c
index d8ac12dfc11..cf6790b2678 100644
--- a/target/s390x/kvm.c
+++ b/target/s390x/kvm.c
@@ -2085,7 +2085,7 @@ int kvm_s390_set_cpu_state(S390CPU *cpu, uint8_t cpu_state)
     int ret;
 
     /* the kvm part might not have been initialized yet */
-    if (CPU(cpu)->kvm_state == NULL) {
+    if (CPU(cpu)->accel_vcpu == NULL) {
         return 0;
     }
 
-- 
2.26.2