1 /* 2 * S390x DIAG instruction helper functions 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 */ 14 15 #include "qemu/osdep.h" 16 #include "cpu.h" 17 #include "s390x-internal.h" 18 #include "hw/watchdog/wdt_diag288.h" 19 #include "sysemu/cpus.h" 20 #include "hw/s390x/ipl.h" 21 #include "hw/s390x/s390-virtio-ccw.h" 22 #include "sysemu/kvm.h" 23 #include "kvm/kvm_s390x.h" 24 #include "target/s390x/kvm/pv.h" 25 #include "qemu/error-report.h" 26 27 28 int handle_diag_288(CPUS390XState *env, uint64_t r1, uint64_t r3) 29 { 30 uint64_t func = env->regs[r1]; 31 uint64_t timeout = env->regs[r1 + 1]; 32 uint64_t action = env->regs[r3]; 33 Object *obj; 34 DIAG288State *diag288; 35 DIAG288Class *diag288_class; 36 37 if (r1 % 2 || action != 0) { 38 return -1; 39 } 40 41 /* Timeout must be more than 15 seconds except for timer deletion */ 42 if (func != WDT_DIAG288_CANCEL && timeout < 15) { 43 return -1; 44 } 45 46 obj = object_resolve_path_type("", TYPE_WDT_DIAG288, NULL); 47 if (!obj) { 48 return -1; 49 } 50 51 diag288 = DIAG288(obj); 52 diag288_class = DIAG288_GET_CLASS(diag288); 53 return diag288_class->handle_timer(diag288, func, timeout); 54 } 55 56 static int diag308_parm_check(CPUS390XState *env, uint64_t r1, uint64_t addr, 57 uintptr_t ra, bool write) 58 { 59 /* Handled by the Ultravisor */ 60 if (s390_is_pv()) { 61 return 0; 62 } 63 if ((r1 & 1) || (addr & ~TARGET_PAGE_MASK)) { 64 s390_program_interrupt(env, PGM_SPECIFICATION, ra); 65 return -1; 66 } 67 if (!address_space_access_valid(&address_space_memory, addr, 68 sizeof(IplParameterBlock), write, 69 MEMTXATTRS_UNSPECIFIED)) { 70 s390_program_interrupt(env, PGM_ADDRESSING, ra); 71 return -1; 72 } 73 return 0; 74 } 75 76 void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra) 77 { 78 bool valid; 79 CPUState *cs = env_cpu(env); 80 S390CPU *cpu = env_archcpu(env); 81 uint64_t addr = env->regs[r1]; 82 uint64_t subcode = env->regs[r3]; 83 IplParameterBlock *iplb; 84 85 if (env->psw.mask & PSW_MASK_PSTATE) { 86 s390_program_interrupt(env, PGM_PRIVILEGED, ra); 87 return; 88 } 89 90 if (subcode & ~0x0ffffULL) { 91 s390_program_interrupt(env, PGM_SPECIFICATION, ra); 92 return; 93 } 94 95 if (subcode >= DIAG308_PV_SET && !s390_has_feat(S390_FEAT_UNPACK)) { 96 s390_program_interrupt(env, PGM_SPECIFICATION, ra); 97 return; 98 } 99 100 switch (subcode) { 101 case DIAG308_RESET_MOD_CLR: 102 s390_ipl_reset_request(cs, S390_RESET_MODIFIED_CLEAR); 103 break; 104 case DIAG308_RESET_LOAD_NORM: 105 s390_ipl_reset_request(cs, S390_RESET_LOAD_NORMAL); 106 break; 107 case DIAG308_LOAD_CLEAR: 108 /* Well we still lack the clearing bit... */ 109 s390_ipl_reset_request(cs, S390_RESET_REIPL); 110 break; 111 case DIAG308_SET: 112 case DIAG308_PV_SET: 113 if (diag308_parm_check(env, r1, addr, ra, false)) { 114 return; 115 } 116 iplb = g_new0(IplParameterBlock, 1); 117 if (!s390_is_pv()) { 118 cpu_physical_memory_read(addr, iplb, sizeof(iplb->len)); 119 } else { 120 s390_cpu_pv_mem_read(cpu, 0, iplb, sizeof(iplb->len)); 121 } 122 123 if (!iplb_valid_len(iplb)) { 124 env->regs[r1 + 1] = DIAG_308_RC_INVALID; 125 goto out; 126 } 127 128 if (!s390_is_pv()) { 129 cpu_physical_memory_read(addr, iplb, be32_to_cpu(iplb->len)); 130 } else { 131 s390_cpu_pv_mem_read(cpu, 0, iplb, be32_to_cpu(iplb->len)); 132 } 133 134 valid = subcode == DIAG308_PV_SET ? iplb_valid_pv(iplb) : iplb_valid(iplb); 135 if (!valid) { 136 env->regs[r1 + 1] = DIAG_308_RC_INVALID; 137 goto out; 138 } 139 140 s390_ipl_update_diag308(iplb); 141 env->regs[r1 + 1] = DIAG_308_RC_OK; 142 out: 143 g_free(iplb); 144 return; 145 case DIAG308_STORE: 146 case DIAG308_PV_STORE: 147 if (diag308_parm_check(env, r1, addr, ra, true)) { 148 return; 149 } 150 if (subcode == DIAG308_PV_STORE) { 151 iplb = s390_ipl_get_iplb_pv(); 152 } else { 153 iplb = s390_ipl_get_iplb(); 154 } 155 if (!iplb) { 156 env->regs[r1 + 1] = DIAG_308_RC_NO_CONF; 157 return; 158 } 159 160 if (!s390_is_pv()) { 161 cpu_physical_memory_write(addr, iplb, be32_to_cpu(iplb->len)); 162 } else { 163 s390_cpu_pv_mem_write(cpu, 0, iplb, be32_to_cpu(iplb->len)); 164 } 165 env->regs[r1 + 1] = DIAG_308_RC_OK; 166 return; 167 case DIAG308_PV_START: 168 iplb = s390_ipl_get_iplb_pv(); 169 if (!iplb) { 170 env->regs[r1 + 1] = DIAG_308_RC_NO_PV_CONF; 171 return; 172 } 173 174 if (kvm_enabled() && kvm_s390_get_hpage_1m()) { 175 error_report("Protected VMs can currently not be backed with " 176 "huge pages"); 177 env->regs[r1 + 1] = DIAG_308_RC_INVAL_FOR_PV; 178 return; 179 } 180 181 s390_ipl_reset_request(cs, S390_RESET_PV); 182 break; 183 default: 184 s390_program_interrupt(env, PGM_SPECIFICATION, ra); 185 break; 186 } 187 } 188