1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 #ifndef SELFTEST_KVM_UCALL_H 3 #define SELFTEST_KVM_UCALL_H 4 5 #include "kvm_util_base.h" 6 7 #define UCALL_EXIT_REASON KVM_EXIT_S390_SIEIC 8 9 static inline void ucall_arch_init(struct kvm_vm *vm, vm_paddr_t mmio_gpa) 10 { 11 } 12 13 static inline void ucall_arch_do_ucall(vm_vaddr_t uc) 14 { 15 /* Exit via DIAGNOSE 0x501 (normally used for breakpoints) */ 16 asm volatile ("diag 0,%0,0x501" : : "a"(uc) : "memory"); 17 } 18 19 #endif 20