20 static int diag_release_pages(struct kvm_vcpu *vcpu)  in diag_release_pages()  argument
23 	unsigned long prefix  = kvm_s390_get_prefix(vcpu);  in diag_release_pages()
25 	start = vcpu->run->s.regs.gprs[(vcpu->arch.sie_block->ipa & 0xf0) >> 4];  in diag_release_pages()
26 	end = vcpu->run->s.regs.gprs[vcpu->arch.sie_block->ipa & 0xf] + PAGE_SIZE;  in diag_release_pages()
27 	vcpu->stat.instruction_diagnose_10++;  in diag_release_pages()
31 		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);  in diag_release_pages()
33 	VCPU_EVENT(vcpu, 5, "diag release pages %lX %lX", start, end);  in diag_release_pages()
40 		gmap_discard(vcpu->arch.gmap, start, end);  in diag_release_pages()
48 		gmap_discard(vcpu->arch.gmap, start, prefix);  in diag_release_pages()
50 			gmap_discard(vcpu->arch.gmap, 0, PAGE_SIZE);  in diag_release_pages()
52 			gmap_discard(vcpu->arch.gmap, PAGE_SIZE, 2 * PAGE_SIZE);  in diag_release_pages()
53 		gmap_discard(vcpu->arch.gmap, prefix + 2 * PAGE_SIZE, end);  in diag_release_pages()
58 static int __diag_page_ref_service(struct kvm_vcpu *vcpu)  in __diag_page_ref_service()  argument
72 	u16 rx = (vcpu->arch.sie_block->ipa & 0xf0) >> 4;  in __diag_page_ref_service()
73 	u16 ry = (vcpu->arch.sie_block->ipa & 0x0f);  in __diag_page_ref_service()
75 	VCPU_EVENT(vcpu, 3, "diag page reference parameter block at 0x%llx",  in __diag_page_ref_service()
76 		   vcpu->run->s.regs.gprs[rx]);  in __diag_page_ref_service()
77 	vcpu->stat.instruction_diagnose_258++;  in __diag_page_ref_service()
78 	if (vcpu->run->s.regs.gprs[rx] & 7)  in __diag_page_ref_service()
79 		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);  in __diag_page_ref_service()
80 	rc = read_guest_real(vcpu, vcpu->run->s.regs.gprs[rx], &parm, sizeof(parm));  in __diag_page_ref_service()
82 		return kvm_s390_inject_prog_cond(vcpu, rc);  in __diag_page_ref_service()
84 		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);  in __diag_page_ref_service()
88 		VCPU_EVENT(vcpu, 3, "pageref token addr 0x%llx "  in __diag_page_ref_service()
91 		if (vcpu->arch.pfault_token != KVM_S390_PFAULT_TOKEN_INVALID) {  in __diag_page_ref_service()
97 			vcpu->run->s.regs.gprs[ry] = 8;  in __diag_page_ref_service()
103 			return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);  in __diag_page_ref_service()
105 		if (!kvm_is_gpa_in_memslot(vcpu->kvm, parm.token_addr))  in __diag_page_ref_service()
106 			return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);  in __diag_page_ref_service()
108 		vcpu->arch.pfault_token = parm.token_addr;  in __diag_page_ref_service()
109 		vcpu->arch.pfault_select = parm.select_mask;  in __diag_page_ref_service()
110 		vcpu->arch.pfault_compare = parm.compare_mask;  in __diag_page_ref_service()
111 		vcpu->run->s.regs.gprs[ry] = 0;  in __diag_page_ref_service()
120 		VCPU_EVENT(vcpu, 3, "pageref cancel addr 0x%llx", parm.token_addr);  in __diag_page_ref_service()
123 			return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);  in __diag_page_ref_service()
125 		vcpu->run->s.regs.gprs[ry] = 0;  in __diag_page_ref_service()
130 		if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)  in __diag_page_ref_service()
131 			vcpu->run->s.regs.gprs[ry] = 4;  in __diag_page_ref_service()
133 			vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;  in __diag_page_ref_service()
145 static int __diag_time_slice_end(struct kvm_vcpu *vcpu)  in __diag_time_slice_end()  argument
147 	VCPU_EVENT(vcpu, 5, "%s", "diag time slice end");  in __diag_time_slice_end()
148 	vcpu->stat.instruction_diagnose_44++;  in __diag_time_slice_end()
149 	kvm_vcpu_on_spin(vcpu, true);  in __diag_time_slice_end()
166 static int __diag_time_slice_end_directed(struct kvm_vcpu *vcpu)  in __diag_time_slice_end_directed()  argument
172 	tid = vcpu->run->s.regs.gprs[(vcpu->arch.sie_block->ipa & 0xf0) >> 4];  in __diag_time_slice_end_directed()
173 	vcpu->stat.instruction_diagnose_9c++;  in __diag_time_slice_end_directed()
176 	if (tid == vcpu->vcpu_id)  in __diag_time_slice_end_directed()
180 	tcpu = kvm_get_vcpu_by_id(vcpu->kvm, tid);  in __diag_time_slice_end_directed()
184 	/* target guest VCPU already running */  in __diag_time_slice_end_directed()
194 		VCPU_EVENT(vcpu, 5,  in __diag_time_slice_end_directed()
197 		vcpu->stat.diag_9c_forward++;  in __diag_time_slice_end_directed()
204 	VCPU_EVENT(vcpu, 5, "diag time slice end directed to %d: done", tid);  in __diag_time_slice_end_directed()
207 	VCPU_EVENT(vcpu, 5, "diag time slice end directed to %d: ignored", tid);  in __diag_time_slice_end_directed()
208 	vcpu->stat.diag_9c_ignored++;  in __diag_time_slice_end_directed()
212 static int __diag_ipl_functions(struct kvm_vcpu *vcpu)  in __diag_ipl_functions()  argument
214 	unsigned int reg = vcpu->arch.sie_block->ipa & 0xf;  in __diag_ipl_functions()
215 	unsigned long subcode = vcpu->run->s.regs.gprs[reg] & 0xffff;  in __diag_ipl_functions()
217 	VCPU_EVENT(vcpu, 3, "diag ipl functions, subcode %lx", subcode);  in __diag_ipl_functions()
218 	vcpu->stat.instruction_diagnose_308++;  in __diag_ipl_functions()
221 		vcpu->run->s390_reset_flags = KVM_S390_RESET_CLEAR;  in __diag_ipl_functions()
224 		vcpu->run->s390_reset_flags = 0;  in __diag_ipl_functions()
234 	if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm))  in __diag_ipl_functions()
235 		kvm_s390_vcpu_stop(vcpu);  in __diag_ipl_functions()
236 	vcpu->run->s390_reset_flags |= KVM_S390_RESET_SUBSYSTEM;  in __diag_ipl_functions()
237 	vcpu->run->s390_reset_flags |= KVM_S390_RESET_IPL;  in __diag_ipl_functions()
238 	vcpu->run->s390_reset_flags |= KVM_S390_RESET_CPU_INIT;  in __diag_ipl_functions()
239 	vcpu->run->exit_reason = KVM_EXIT_S390_RESET;  in __diag_ipl_functions()
240 	VCPU_EVENT(vcpu, 3, "requesting userspace resets %llx",  in __diag_ipl_functions()
241 	  vcpu->run->s390_reset_flags);  in __diag_ipl_functions()
242 	trace_kvm_s390_request_resets(vcpu->run->s390_reset_flags);  in __diag_ipl_functions()
246 static int __diag_virtio_hypercall(struct kvm_vcpu *vcpu)  in __diag_virtio_hypercall()  argument
250 	vcpu->stat.instruction_diagnose_500++;  in __diag_virtio_hypercall()
252 	if (!vcpu->kvm->arch.css_support ||  in __diag_virtio_hypercall()
253 	    (vcpu->run->s.regs.gprs[1] != KVM_S390_VIRTIO_CCW_NOTIFY))  in __diag_virtio_hypercall()
256 	VCPU_EVENT(vcpu, 4, "diag 0x500 schid 0x%8.8x queue 0x%x cookie 0x%llx",  in __diag_virtio_hypercall()
257 			    (u32) vcpu->run->s.regs.gprs[2],  in __diag_virtio_hypercall()
258 			    (u32) vcpu->run->s.regs.gprs[3],  in __diag_virtio_hypercall()
259 			    vcpu->run->s.regs.gprs[4]);  in __diag_virtio_hypercall()
267 	ret = kvm_io_bus_write_cookie(vcpu, KVM_VIRTIO_CCW_NOTIFY_BUS,  in __diag_virtio_hypercall()
268 				      vcpu->run->s.regs.gprs[2] & 0xffffffff,  in __diag_virtio_hypercall()
269 				      8, &vcpu->run->s.regs.gprs[3],  in __diag_virtio_hypercall()
270 				      vcpu->run->s.regs.gprs[4]);  in __diag_virtio_hypercall()
277 		vcpu->run->s.regs.gprs[2] = ret;  in __diag_virtio_hypercall()
282 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu)  in kvm_s390_handle_diag()  argument
284 	int code = kvm_s390_get_base_disp_rs(vcpu, NULL) & 0xffff;  in kvm_s390_handle_diag()
286 	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)  in kvm_s390_handle_diag()
287 		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);  in kvm_s390_handle_diag()
289 	trace_kvm_s390_handle_diag(vcpu, code);  in kvm_s390_handle_diag()
292 		return diag_release_pages(vcpu);  in kvm_s390_handle_diag()
294 		return __diag_time_slice_end(vcpu);  in kvm_s390_handle_diag()
296 		return __diag_time_slice_end_directed(vcpu);  in kvm_s390_handle_diag()
298 		return __diag_page_ref_service(vcpu);  in kvm_s390_handle_diag()
300 		return __diag_ipl_functions(vcpu);  in kvm_s390_handle_diag()
302 		return __diag_virtio_hypercall(vcpu);  in kvm_s390_handle_diag()
304 		vcpu->stat.instruction_diagnose_other++;  in kvm_s390_handle_diag()