kvm: Consolidate must-have capability checks

Instead of splattering the code with #ifdefs and runtime checks for
capabilities we cannot work without anyway, provide central test
infrastructure for verifying their availability both at build and
runtime.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/kvm.h b/kvm.h
index a9717528e2..ca57517af2 100644
--- a/kvm.h
+++ b/kvm.h
@@ -32,6 +32,14 @@ extern int kvm_allowed;
 
 struct kvm_run;
 
+typedef struct KVMCapabilityInfo {
+    const char *name;
+    int value;
+} KVMCapabilityInfo;
+
+#define KVM_CAP_INFO(CAP) { "KVM_CAP_" stringify(CAP), KVM_CAP_##CAP }
+#define KVM_CAP_LAST_INFO { NULL, 0 }
+
 /* external API */
 
 int kvm_init(void);
@@ -86,6 +94,8 @@ int kvm_vcpu_ioctl(CPUState *env, int type, ...);
 
 /* Arch specific hooks */
 
+extern const KVMCapabilityInfo kvm_arch_required_capabilities[];
+
 int kvm_arch_post_run(CPUState *env, struct kvm_run *run);
 
 int kvm_arch_handle_exit(CPUState *env, struct kvm_run *run);