1 // SPDX-License-Identifier: GPL-2.0
14 #include <asm/virtio-ccw.h>
15 #include "kvm-s390.h"
17 #include "trace-s390.h"
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.diagnose_10++;  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()
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()
76 		   vcpu->run->s.regs.gprs[rx]);  in __diag_page_ref_service()
77 	vcpu->stat.diagnose_258++;  in __diag_page_ref_service()
78 	if (vcpu->run->s.regs.gprs[rx] & 7)  in __diag_page_ref_service()
80 	rc = read_guest(vcpu, vcpu->run->s.regs.gprs[rx], rx, &parm, sizeof(parm));  in __diag_page_ref_service()
91 		if (vcpu->arch.pfault_token != KVM_S390_PFAULT_TOKEN_INVALID) {  in __diag_page_ref_service()
95 			 * decimal 8 instead, as mandated in SC24-6084.  in __diag_page_ref_service()
97 			vcpu->run->s.regs.gprs[ry] = 8;  in __diag_page_ref_service()
105 		if (kvm_is_error_gpa(vcpu->kvm, parm.token_addr))  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()
125 		vcpu->run->s.regs.gprs[ry] = 0;  in __diag_page_ref_service()
128 		 * canceled SC24-6084 requests to return decimal 4.  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()
138 		rc = -EOPNOTSUPP;  in __diag_page_ref_service()
148 	vcpu->stat.diagnose_44++;  in __diag_time_slice_end()
158 	tid = vcpu->run->s.regs.gprs[(vcpu->arch.sie_block->ipa & 0xf0) >> 4];  in __diag_time_slice_end_directed()
159 	vcpu->stat.diagnose_9c++;  in __diag_time_slice_end_directed()
162 	if (tid == vcpu->vcpu_id)  in __diag_time_slice_end_directed()
166 	tcpu = kvm_get_vcpu_by_id(vcpu->kvm, tid);  in __diag_time_slice_end_directed()
171 	if (READ_ONCE(tcpu->cpu) >= 0)  in __diag_time_slice_end_directed()
181 	vcpu->stat.diagnose_9c_ignored++;  in __diag_time_slice_end_directed()
187 	unsigned int reg = vcpu->arch.sie_block->ipa & 0xf;  in __diag_ipl_functions()  local
188 	unsigned long subcode = vcpu->run->s.regs.gprs[reg] & 0xffff;  in __diag_ipl_functions()
191 	vcpu->stat.diagnose_308++;  in __diag_ipl_functions()
194 		vcpu->run->s390_reset_flags = KVM_S390_RESET_CLEAR;  in __diag_ipl_functions()
197 		vcpu->run->s390_reset_flags = 0;  in __diag_ipl_functions()
200 		return -EOPNOTSUPP;  in __diag_ipl_functions()
207 	if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm))  in __diag_ipl_functions()
209 	vcpu->run->s390_reset_flags |= KVM_S390_RESET_SUBSYSTEM;  in __diag_ipl_functions()
210 	vcpu->run->s390_reset_flags |= KVM_S390_RESET_IPL;  in __diag_ipl_functions()
211 	vcpu->run->s390_reset_flags |= KVM_S390_RESET_CPU_INIT;  in __diag_ipl_functions()
212 	vcpu->run->exit_reason = KVM_EXIT_S390_RESET;  in __diag_ipl_functions()
214 	  vcpu->run->s390_reset_flags);  in __diag_ipl_functions()
215 	trace_kvm_s390_request_resets(vcpu->run->s390_reset_flags);  in __diag_ipl_functions()
216 	return -EREMOTE;  in __diag_ipl_functions()
223 	vcpu->stat.diagnose_500++;  in __diag_virtio_hypercall()
224 	/* No virtio-ccw notification? Get out quickly. */  in __diag_virtio_hypercall()
225 	if (!vcpu->kvm->arch.css_support ||  in __diag_virtio_hypercall()
226 	    (vcpu->run->s.regs.gprs[1] != KVM_S390_VIRTIO_CCW_NOTIFY))  in __diag_virtio_hypercall()
227 		return -EOPNOTSUPP;  in __diag_virtio_hypercall()
230 			    (u32) vcpu->run->s.regs.gprs[2],  in __diag_virtio_hypercall()
231 			    (u32) vcpu->run->s.regs.gprs[3],  in __diag_virtio_hypercall()
232 			    vcpu->run->s.regs.gprs[4]);  in __diag_virtio_hypercall()
236 	 * - gpr 2 contains the subchannel id (passed as addr)  in __diag_virtio_hypercall()
237 	 * - gpr 3 contains the virtqueue index (passed as datamatch)  in __diag_virtio_hypercall()
238 	 * - gpr 4 contains the index on the bus (optionally)  in __diag_virtio_hypercall()
241 				      vcpu->run->s.regs.gprs[2] & 0xffffffff,  in __diag_virtio_hypercall()
242 				      8, &vcpu->run->s.regs.gprs[3],  in __diag_virtio_hypercall()
243 				      vcpu->run->s.regs.gprs[4]);  in __diag_virtio_hypercall()
249 	if (ret != -EOPNOTSUPP)  in __diag_virtio_hypercall()
250 		vcpu->run->s.regs.gprs[2] = ret;  in __diag_virtio_hypercall()
251 	/* kvm_io_bus_write_cookie returns -EOPNOTSUPP if it found no match. */  in __diag_virtio_hypercall()
259 	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)  in kvm_s390_handle_diag()
277 		vcpu->stat.diagnose_other++;  in kvm_s390_handle_diag()
278 		return -EOPNOTSUPP;  in kvm_s390_handle_diag()