23 struct ucall {  struct
29 	struct ucall *hva;  argument
36 void ucall(uint64_t cmd, int nargs, ...);
40 uint64_t get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc);
53 				ucall(UCALL_SYNC, 6, "hello", stage, arg1, arg2, arg3, arg4)
54 #define GUEST_SYNC(stage)	ucall(UCALL_SYNC, 2, "hello", stage)
56 #define GUEST_DONE()		ucall(UCALL_DONE, 0)
58 #define REPORT_GUEST_PRINTF(ucall) pr_info("%s", (ucall).buffer)  argument
99 #define REPORT_GUEST_ASSERT(ucall)						\  argument
100 	test_assert(false, (const char *)(ucall).args[GUEST_ERROR_STRING],	\
101 		    (const char *)(ucall).args[GUEST_FILE],			\
102 		    (ucall).args[GUEST_LINE], "%s", (ucall).buffer)