23 static int diag_release_pages(struct kvm_vcpu *vcpu)  in diag_release_pages()  argument
26 	unsigned long prefix  = kvm_s390_get_prefix(vcpu);  in diag_release_pages()
28 	start = vcpu->run->s.regs.gprs[(vcpu->arch.sie_block->ipa & 0xf0) >> 4];  in diag_release_pages()
29 	end = vcpu->run->s.regs.gprs[vcpu->arch.sie_block->ipa & 0xf] + 4096;  in diag_release_pages()
30 	vcpu->stat.diagnose_10++;  in diag_release_pages()
34 		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);  in diag_release_pages()
36 	VCPU_EVENT(vcpu, 5, "diag release pages %lX %lX", start, end);  in diag_release_pages()
43 		gmap_discard(vcpu->arch.gmap, start, end);  in diag_release_pages()
51 		gmap_discard(vcpu->arch.gmap, start, prefix);  in diag_release_pages()
53 			gmap_discard(vcpu->arch.gmap, 0, 4096);  in diag_release_pages()
55 			gmap_discard(vcpu->arch.gmap, 4096, 8192);  in diag_release_pages()
56 		gmap_discard(vcpu->arch.gmap, prefix + 2 * PAGE_SIZE, end);  in diag_release_pages()
61 static int __diag_page_ref_service(struct kvm_vcpu *vcpu)  in __diag_page_ref_service()  argument
75 	u16 rx = (vcpu->arch.sie_block->ipa & 0xf0) >> 4;  in __diag_page_ref_service()
76 	u16 ry = (vcpu->arch.sie_block->ipa & 0x0f);  in __diag_page_ref_service()
78 	VCPU_EVENT(vcpu, 3, "diag page reference parameter block at 0x%llx",  in __diag_page_ref_service()
79 		   vcpu->run->s.regs.gprs[rx]);  in __diag_page_ref_service()
80 	vcpu->stat.diagnose_258++;  in __diag_page_ref_service()
81 	if (vcpu->run->s.regs.gprs[rx] & 7)  in __diag_page_ref_service()
82 		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);  in __diag_page_ref_service()
83 	rc = read_guest(vcpu, vcpu->run->s.regs.gprs[rx], rx, &parm, sizeof(parm));  in __diag_page_ref_service()
85 		return kvm_s390_inject_prog_cond(vcpu, rc);  in __diag_page_ref_service()
87 		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);  in __diag_page_ref_service()
91 		VCPU_EVENT(vcpu, 3, "pageref token addr 0x%llx "  in __diag_page_ref_service()
94 		if (vcpu->arch.pfault_token != KVM_S390_PFAULT_TOKEN_INVALID) {  in __diag_page_ref_service()
100 			vcpu->run->s.regs.gprs[ry] = 8;  in __diag_page_ref_service()
106 			return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);  in __diag_page_ref_service()
108 		if (kvm_is_error_gpa(vcpu->kvm, parm.token_addr))  in __diag_page_ref_service()
109 			return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);  in __diag_page_ref_service()
111 		vcpu->arch.pfault_token = parm.token_addr;  in __diag_page_ref_service()
112 		vcpu->arch.pfault_select = parm.select_mask;  in __diag_page_ref_service()
113 		vcpu->arch.pfault_compare = parm.compare_mask;  in __diag_page_ref_service()
114 		vcpu->run->s.regs.gprs[ry] = 0;  in __diag_page_ref_service()
123 		VCPU_EVENT(vcpu, 3, "pageref cancel addr 0x%llx", parm.token_addr);  in __diag_page_ref_service()
126 			return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);  in __diag_page_ref_service()
128 		vcpu->run->s.regs.gprs[ry] = 0;  in __diag_page_ref_service()
133 		if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID)  in __diag_page_ref_service()
134 			vcpu->run->s.regs.gprs[ry] = 4;  in __diag_page_ref_service()
136 			vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;  in __diag_page_ref_service()
148 static int __diag_time_slice_end(struct kvm_vcpu *vcpu)  in __diag_time_slice_end()  argument
150 	VCPU_EVENT(vcpu, 5, "%s", "diag time slice end");  in __diag_time_slice_end()
151 	vcpu->stat.diagnose_44++;  in __diag_time_slice_end()
152 	kvm_vcpu_on_spin(vcpu);  in __diag_time_slice_end()
156 static int __diag_time_slice_end_directed(struct kvm_vcpu *vcpu)  in __diag_time_slice_end_directed()  argument
158 	struct kvm *kvm = vcpu->kvm;  in __diag_time_slice_end_directed()
163 	tid = vcpu->run->s.regs.gprs[(vcpu->arch.sie_block->ipa & 0xf0) >> 4];  in __diag_time_slice_end_directed()
164 	vcpu->stat.diagnose_9c++;  in __diag_time_slice_end_directed()
165 	VCPU_EVENT(vcpu, 5, "diag time slice end directed to %d", tid);  in __diag_time_slice_end_directed()
167 	if (tid == vcpu->vcpu_id)  in __diag_time_slice_end_directed()
179 static int __diag_ipl_functions(struct kvm_vcpu *vcpu)  in __diag_ipl_functions()  argument
181 	unsigned int reg = vcpu->arch.sie_block->ipa & 0xf;  in __diag_ipl_functions()
182 	unsigned long subcode = vcpu->run->s.regs.gprs[reg] & 0xffff;  in __diag_ipl_functions()
184 	VCPU_EVENT(vcpu, 3, "diag ipl functions, subcode %lx", subcode);  in __diag_ipl_functions()
185 	vcpu->stat.diagnose_308++;  in __diag_ipl_functions()
188 		vcpu->run->s390_reset_flags = KVM_S390_RESET_CLEAR;  in __diag_ipl_functions()
191 		vcpu->run->s390_reset_flags = 0;  in __diag_ipl_functions()
197 	if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm))  in __diag_ipl_functions()
198 		kvm_s390_vcpu_stop(vcpu);  in __diag_ipl_functions()
199 	vcpu->run->s390_reset_flags |= KVM_S390_RESET_SUBSYSTEM;  in __diag_ipl_functions()
200 	vcpu->run->s390_reset_flags |= KVM_S390_RESET_IPL;  in __diag_ipl_functions()
201 	vcpu->run->s390_reset_flags |= KVM_S390_RESET_CPU_INIT;  in __diag_ipl_functions()
202 	vcpu->run->exit_reason = KVM_EXIT_S390_RESET;  in __diag_ipl_functions()
203 	VCPU_EVENT(vcpu, 3, "requesting userspace resets %llx",  in __diag_ipl_functions()
204 	  vcpu->run->s390_reset_flags);  in __diag_ipl_functions()
205 	trace_kvm_s390_request_resets(vcpu->run->s390_reset_flags);  in __diag_ipl_functions()
209 static int __diag_virtio_hypercall(struct kvm_vcpu *vcpu)  in __diag_virtio_hypercall()  argument
213 	vcpu->stat.diagnose_500++;  in __diag_virtio_hypercall()
215 	if (!vcpu->kvm->arch.css_support ||  in __diag_virtio_hypercall()
216 	    (vcpu->run->s.regs.gprs[1] != KVM_S390_VIRTIO_CCW_NOTIFY))  in __diag_virtio_hypercall()
225 	ret = kvm_io_bus_write_cookie(vcpu, KVM_VIRTIO_CCW_NOTIFY_BUS,  in __diag_virtio_hypercall()
226 				      vcpu->run->s.regs.gprs[2] & 0xffffffff,  in __diag_virtio_hypercall()
227 				      8, &vcpu->run->s.regs.gprs[3],  in __diag_virtio_hypercall()
228 				      vcpu->run->s.regs.gprs[4]);  in __diag_virtio_hypercall()
235 		vcpu->run->s.regs.gprs[2] = ret;  in __diag_virtio_hypercall()
240 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu)  in kvm_s390_handle_diag()  argument
242 	int code = kvm_s390_get_base_disp_rs(vcpu, NULL) & 0xffff;  in kvm_s390_handle_diag()
244 	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)  in kvm_s390_handle_diag()
245 		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);  in kvm_s390_handle_diag()
247 	trace_kvm_s390_handle_diag(vcpu, code);  in kvm_s390_handle_diag()
250 		return diag_release_pages(vcpu);  in kvm_s390_handle_diag()
252 		return __diag_time_slice_end(vcpu);  in kvm_s390_handle_diag()
254 		return __diag_time_slice_end_directed(vcpu);  in kvm_s390_handle_diag()
256 		return __diag_page_ref_service(vcpu);  in kvm_s390_handle_diag()
258 		return __diag_ipl_functions(vcpu);  in kvm_s390_handle_diag()
260 		return __diag_virtio_hypercall(vcpu);  in kvm_s390_handle_diag()