selftest: kvm: Move struct kvm_x86_state to header

Those changes can avoid dereferencing pointer compile issue
when amx_test.c reference state->xsave.

Move struct kvm_x86_state definition to processor.h.
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20211223145322.2914028-3-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

tools/testing/selftests/kvm/include/x86_64/processor.h

@@ -94,6 +94,21 @@ struct desc_ptr {
 	uint64_t address;
 } __attribute__((packed));
 
+struct kvm_x86_state {
+	struct kvm_xsave *xsave;
+	struct kvm_vcpu_events events;
+	struct kvm_mp_state mp_state;
+	struct kvm_regs regs;
+	struct kvm_xcrs xcrs;
+	struct kvm_sregs sregs;
+	struct kvm_debugregs debugregs;
+	union {
+		struct kvm_nested_state nested;
+		char nested_[16384];
+	};
+	struct kvm_msrs msrs;
+};
+
 static inline uint64_t get_desc64_base(const struct desc64 *desc)
 {
 	return ((uint64_t)desc->base3 << 32) |
@@ -350,7 +365,6 @@ static inline unsigned long get_xmm(int n)
 
 bool is_intel_cpu(void);
 
-struct kvm_x86_state;
 struct kvm_x86_state *vcpu_save_state(struct kvm_vm *vm, uint32_t vcpuid);
 void vcpu_load_state(struct kvm_vm *vm, uint32_t vcpuid,
 		     struct kvm_x86_state *state);

tools/testing/selftests/kvm/lib/x86_64/processor.c

@@ -1056,21 +1056,6 @@ void vcpu_dump(FILE *stream, struct kvm_vm *vm, uint32_t vcpuid, uint8_t indent)
 	sregs_dump(stream, &sregs, indent + 4);
 }
 
-struct kvm_x86_state {
-	struct kvm_xsave *xsave;
-	struct kvm_vcpu_events events;
-	struct kvm_mp_state mp_state;
-	struct kvm_regs regs;
-	struct kvm_xcrs xcrs;
-	struct kvm_sregs sregs;
-	struct kvm_debugregs debugregs;
-	union {
-		struct kvm_nested_state nested;
-		char nested_[16384];
-	};
-	struct kvm_msrs msrs;
-};
-
 static int kvm_get_num_msrs_fd(int kvm_fd)
 {
 	struct kvm_msr_list nmsrs;