18f2abe6aSChristian Borntraeger /* 28f2abe6aSChristian Borntraeger * intercept.c - in-kernel handling for sie intercepts 38f2abe6aSChristian Borntraeger * 48f2abe6aSChristian Borntraeger * Copyright IBM Corp. 2008 58f2abe6aSChristian Borntraeger * 68f2abe6aSChristian Borntraeger * This program is free software; you can redistribute it and/or modify 78f2abe6aSChristian Borntraeger * it under the terms of the GNU General Public License (version 2 only) 88f2abe6aSChristian Borntraeger * as published by the Free Software Foundation. 98f2abe6aSChristian Borntraeger * 108f2abe6aSChristian Borntraeger * Author(s): Carsten Otte <cotte@de.ibm.com> 118f2abe6aSChristian Borntraeger * Christian Borntraeger <borntraeger@de.ibm.com> 128f2abe6aSChristian Borntraeger */ 138f2abe6aSChristian Borntraeger 148f2abe6aSChristian Borntraeger #include <linux/kvm_host.h> 158f2abe6aSChristian Borntraeger #include <linux/errno.h> 168f2abe6aSChristian Borntraeger #include <linux/pagemap.h> 178f2abe6aSChristian Borntraeger 188f2abe6aSChristian Borntraeger #include <asm/kvm_host.h> 198f2abe6aSChristian Borntraeger 208f2abe6aSChristian Borntraeger #include "kvm-s390.h" 21ba5c1e9bSCarsten Otte #include "gaccess.h" 22ba5c1e9bSCarsten Otte 23f5e10b09SChristian Borntraeger static int handle_lctlg(struct kvm_vcpu *vcpu) 24ba5c1e9bSCarsten Otte { 25ba5c1e9bSCarsten Otte int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4; 26ba5c1e9bSCarsten Otte int reg3 = vcpu->arch.sie_block->ipa & 0x000f; 27ba5c1e9bSCarsten Otte int base2 = vcpu->arch.sie_block->ipb >> 28; 28ba5c1e9bSCarsten Otte int disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) + 29ba5c1e9bSCarsten Otte ((vcpu->arch.sie_block->ipb & 0xff00) << 4); 30ba5c1e9bSCarsten Otte u64 useraddr; 31ba5c1e9bSCarsten Otte int reg, rc; 32ba5c1e9bSCarsten Otte 33f5e10b09SChristian Borntraeger vcpu->stat.instruction_lctlg++; 34ba5c1e9bSCarsten Otte if ((vcpu->arch.sie_block->ipb & 0xff) != 0x2f) 35ba5c1e9bSCarsten Otte return -ENOTSUPP; 36ba5c1e9bSCarsten Otte 37ba5c1e9bSCarsten Otte useraddr = disp2; 38ba5c1e9bSCarsten Otte if (base2) 39ba5c1e9bSCarsten Otte useraddr += vcpu->arch.guest_gprs[base2]; 40ba5c1e9bSCarsten Otte 41*5a00a5e7SChristian Borntraeger if (useraddr & 7) 42*5a00a5e7SChristian Borntraeger return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 43*5a00a5e7SChristian Borntraeger 44ba5c1e9bSCarsten Otte reg = reg1; 45ba5c1e9bSCarsten Otte 46f5e10b09SChristian Borntraeger VCPU_EVENT(vcpu, 5, "lctlg r1:%x, r3:%x,b2:%x,d2:%x", reg1, reg3, base2, 47ba5c1e9bSCarsten Otte disp2); 48ba5c1e9bSCarsten Otte 49ba5c1e9bSCarsten Otte do { 50ba5c1e9bSCarsten Otte rc = get_guest_u64(vcpu, useraddr, 51ba5c1e9bSCarsten Otte &vcpu->arch.sie_block->gcr[reg]); 52ba5c1e9bSCarsten Otte if (rc == -EFAULT) { 53ba5c1e9bSCarsten Otte kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); 54ba5c1e9bSCarsten Otte break; 55ba5c1e9bSCarsten Otte } 56ba5c1e9bSCarsten Otte useraddr += 8; 57ba5c1e9bSCarsten Otte if (reg == reg3) 58ba5c1e9bSCarsten Otte break; 59ba5c1e9bSCarsten Otte reg = (reg + 1) % 16; 60ba5c1e9bSCarsten Otte } while (1); 61ba5c1e9bSCarsten Otte return 0; 62ba5c1e9bSCarsten Otte } 63ba5c1e9bSCarsten Otte 64ba5c1e9bSCarsten Otte static int handle_lctl(struct kvm_vcpu *vcpu) 65ba5c1e9bSCarsten Otte { 66ba5c1e9bSCarsten Otte int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4; 67ba5c1e9bSCarsten Otte int reg3 = vcpu->arch.sie_block->ipa & 0x000f; 68ba5c1e9bSCarsten Otte int base2 = vcpu->arch.sie_block->ipb >> 28; 69ba5c1e9bSCarsten Otte int disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); 70ba5c1e9bSCarsten Otte u64 useraddr; 71ba5c1e9bSCarsten Otte u32 val = 0; 72ba5c1e9bSCarsten Otte int reg, rc; 73ba5c1e9bSCarsten Otte 74ba5c1e9bSCarsten Otte vcpu->stat.instruction_lctl++; 75ba5c1e9bSCarsten Otte 76ba5c1e9bSCarsten Otte useraddr = disp2; 77ba5c1e9bSCarsten Otte if (base2) 78ba5c1e9bSCarsten Otte useraddr += vcpu->arch.guest_gprs[base2]; 79ba5c1e9bSCarsten Otte 80*5a00a5e7SChristian Borntraeger if (useraddr & 3) 81*5a00a5e7SChristian Borntraeger return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); 82*5a00a5e7SChristian Borntraeger 83ba5c1e9bSCarsten Otte VCPU_EVENT(vcpu, 5, "lctl r1:%x, r3:%x,b2:%x,d2:%x", reg1, reg3, base2, 84ba5c1e9bSCarsten Otte disp2); 85ba5c1e9bSCarsten Otte 86ba5c1e9bSCarsten Otte reg = reg1; 87ba5c1e9bSCarsten Otte do { 88ba5c1e9bSCarsten Otte rc = get_guest_u32(vcpu, useraddr, &val); 89ba5c1e9bSCarsten Otte if (rc == -EFAULT) { 90ba5c1e9bSCarsten Otte kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); 91ba5c1e9bSCarsten Otte break; 92ba5c1e9bSCarsten Otte } 93ba5c1e9bSCarsten Otte vcpu->arch.sie_block->gcr[reg] &= 0xffffffff00000000ul; 94ba5c1e9bSCarsten Otte vcpu->arch.sie_block->gcr[reg] |= val; 95ba5c1e9bSCarsten Otte useraddr += 4; 96ba5c1e9bSCarsten Otte if (reg == reg3) 97ba5c1e9bSCarsten Otte break; 98ba5c1e9bSCarsten Otte reg = (reg + 1) % 16; 99ba5c1e9bSCarsten Otte } while (1); 100ba5c1e9bSCarsten Otte return 0; 101ba5c1e9bSCarsten Otte } 102ba5c1e9bSCarsten Otte 103ba5c1e9bSCarsten Otte static intercept_handler_t instruction_handlers[256] = { 104e28acfeaSChristian Borntraeger [0x83] = kvm_s390_handle_diag, 1055288fbf0SChristian Borntraeger [0xae] = kvm_s390_handle_sigp, 106453423dcSChristian Borntraeger [0xb2] = kvm_s390_handle_priv, 107ba5c1e9bSCarsten Otte [0xb7] = handle_lctl, 108f5e10b09SChristian Borntraeger [0xeb] = handle_lctlg, 109ba5c1e9bSCarsten Otte }; 1108f2abe6aSChristian Borntraeger 1118f2abe6aSChristian Borntraeger static int handle_noop(struct kvm_vcpu *vcpu) 1128f2abe6aSChristian Borntraeger { 1138f2abe6aSChristian Borntraeger switch (vcpu->arch.sie_block->icptcode) { 1140eaeafa1SChristian Borntraeger case 0x0: 1150eaeafa1SChristian Borntraeger vcpu->stat.exit_null++; 1160eaeafa1SChristian Borntraeger break; 1178f2abe6aSChristian Borntraeger case 0x10: 1188f2abe6aSChristian Borntraeger vcpu->stat.exit_external_request++; 1198f2abe6aSChristian Borntraeger break; 1208f2abe6aSChristian Borntraeger case 0x14: 1218f2abe6aSChristian Borntraeger vcpu->stat.exit_external_interrupt++; 1228f2abe6aSChristian Borntraeger break; 1238f2abe6aSChristian Borntraeger default: 1248f2abe6aSChristian Borntraeger break; /* nothing */ 1258f2abe6aSChristian Borntraeger } 1268f2abe6aSChristian Borntraeger return 0; 1278f2abe6aSChristian Borntraeger } 1288f2abe6aSChristian Borntraeger 1298f2abe6aSChristian Borntraeger static int handle_stop(struct kvm_vcpu *vcpu) 1308f2abe6aSChristian Borntraeger { 1315288fbf0SChristian Borntraeger int rc; 1325288fbf0SChristian Borntraeger 1338f2abe6aSChristian Borntraeger vcpu->stat.exit_stop_request++; 1348f2abe6aSChristian Borntraeger atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); 1355288fbf0SChristian Borntraeger spin_lock_bh(&vcpu->arch.local_int.lock); 1365288fbf0SChristian Borntraeger if (vcpu->arch.local_int.action_bits & ACTION_STORE_ON_STOP) { 1375288fbf0SChristian Borntraeger vcpu->arch.local_int.action_bits &= ~ACTION_STORE_ON_STOP; 1385288fbf0SChristian Borntraeger rc = __kvm_s390_vcpu_store_status(vcpu, 1395288fbf0SChristian Borntraeger KVM_S390_STORE_STATUS_NOADDR); 1405288fbf0SChristian Borntraeger if (rc >= 0) 1415288fbf0SChristian Borntraeger rc = -ENOTSUPP; 1425288fbf0SChristian Borntraeger } 1435288fbf0SChristian Borntraeger 1445288fbf0SChristian Borntraeger if (vcpu->arch.local_int.action_bits & ACTION_STOP_ON_STOP) { 1455288fbf0SChristian Borntraeger vcpu->arch.local_int.action_bits &= ~ACTION_STOP_ON_STOP; 1465288fbf0SChristian Borntraeger VCPU_EVENT(vcpu, 3, "%s", "cpu stopped"); 1475288fbf0SChristian Borntraeger rc = -ENOTSUPP; 1485288fbf0SChristian Borntraeger } else 1495288fbf0SChristian Borntraeger rc = 0; 1505288fbf0SChristian Borntraeger spin_unlock_bh(&vcpu->arch.local_int.lock); 1515288fbf0SChristian Borntraeger return rc; 1528f2abe6aSChristian Borntraeger } 1538f2abe6aSChristian Borntraeger 1548f2abe6aSChristian Borntraeger static int handle_validity(struct kvm_vcpu *vcpu) 1558f2abe6aSChristian Borntraeger { 1568f2abe6aSChristian Borntraeger int viwhy = vcpu->arch.sie_block->ipb >> 16; 1578f2abe6aSChristian Borntraeger vcpu->stat.exit_validity++; 1588f2abe6aSChristian Borntraeger if (viwhy == 0x37) { 1598f2abe6aSChristian Borntraeger fault_in_pages_writeable((char __user *) 1608f2abe6aSChristian Borntraeger vcpu->kvm->arch.guest_origin + 1618f2abe6aSChristian Borntraeger vcpu->arch.sie_block->prefix, 1628f2abe6aSChristian Borntraeger PAGE_SIZE); 1638f2abe6aSChristian Borntraeger return 0; 1648f2abe6aSChristian Borntraeger } 1658f2abe6aSChristian Borntraeger VCPU_EVENT(vcpu, 2, "unhandled validity intercept code %d", 1668f2abe6aSChristian Borntraeger viwhy); 1678f2abe6aSChristian Borntraeger return -ENOTSUPP; 1688f2abe6aSChristian Borntraeger } 1698f2abe6aSChristian Borntraeger 170ba5c1e9bSCarsten Otte static int handle_instruction(struct kvm_vcpu *vcpu) 171ba5c1e9bSCarsten Otte { 172ba5c1e9bSCarsten Otte intercept_handler_t handler; 173ba5c1e9bSCarsten Otte 174ba5c1e9bSCarsten Otte vcpu->stat.exit_instruction++; 175ba5c1e9bSCarsten Otte handler = instruction_handlers[vcpu->arch.sie_block->ipa >> 8]; 176ba5c1e9bSCarsten Otte if (handler) 177ba5c1e9bSCarsten Otte return handler(vcpu); 178ba5c1e9bSCarsten Otte return -ENOTSUPP; 179ba5c1e9bSCarsten Otte } 180ba5c1e9bSCarsten Otte 181ba5c1e9bSCarsten Otte static int handle_prog(struct kvm_vcpu *vcpu) 182ba5c1e9bSCarsten Otte { 183ba5c1e9bSCarsten Otte vcpu->stat.exit_program_interruption++; 184ba5c1e9bSCarsten Otte return kvm_s390_inject_program_int(vcpu, vcpu->arch.sie_block->iprcc); 185ba5c1e9bSCarsten Otte } 186ba5c1e9bSCarsten Otte 187ba5c1e9bSCarsten Otte static int handle_instruction_and_prog(struct kvm_vcpu *vcpu) 188ba5c1e9bSCarsten Otte { 189ba5c1e9bSCarsten Otte int rc, rc2; 190ba5c1e9bSCarsten Otte 191ba5c1e9bSCarsten Otte vcpu->stat.exit_instr_and_program++; 192ba5c1e9bSCarsten Otte rc = handle_instruction(vcpu); 193ba5c1e9bSCarsten Otte rc2 = handle_prog(vcpu); 194ba5c1e9bSCarsten Otte 195ba5c1e9bSCarsten Otte if (rc == -ENOTSUPP) 196ba5c1e9bSCarsten Otte vcpu->arch.sie_block->icptcode = 0x04; 197ba5c1e9bSCarsten Otte if (rc) 198ba5c1e9bSCarsten Otte return rc; 199ba5c1e9bSCarsten Otte return rc2; 200ba5c1e9bSCarsten Otte } 201ba5c1e9bSCarsten Otte 2028f2abe6aSChristian Borntraeger static const intercept_handler_t intercept_funcs[0x48 >> 2] = { 2038f2abe6aSChristian Borntraeger [0x00 >> 2] = handle_noop, 204ba5c1e9bSCarsten Otte [0x04 >> 2] = handle_instruction, 205ba5c1e9bSCarsten Otte [0x08 >> 2] = handle_prog, 206ba5c1e9bSCarsten Otte [0x0C >> 2] = handle_instruction_and_prog, 2078f2abe6aSChristian Borntraeger [0x10 >> 2] = handle_noop, 2088f2abe6aSChristian Borntraeger [0x14 >> 2] = handle_noop, 209ba5c1e9bSCarsten Otte [0x1C >> 2] = kvm_s390_handle_wait, 2108f2abe6aSChristian Borntraeger [0x20 >> 2] = handle_validity, 2118f2abe6aSChristian Borntraeger [0x28 >> 2] = handle_stop, 2128f2abe6aSChristian Borntraeger }; 2138f2abe6aSChristian Borntraeger 2148f2abe6aSChristian Borntraeger int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu) 2158f2abe6aSChristian Borntraeger { 2168f2abe6aSChristian Borntraeger intercept_handler_t func; 2178f2abe6aSChristian Borntraeger u8 code = vcpu->arch.sie_block->icptcode; 2188f2abe6aSChristian Borntraeger 2198f2abe6aSChristian Borntraeger if (code & 3 || code > 0x48) 2208f2abe6aSChristian Borntraeger return -ENOTSUPP; 2218f2abe6aSChristian Borntraeger func = intercept_funcs[code >> 2]; 2228f2abe6aSChristian Borntraeger if (func) 2238f2abe6aSChristian Borntraeger return func(vcpu); 2248f2abe6aSChristian Borntraeger return -ENOTSUPP; 2258f2abe6aSChristian Borntraeger } 226