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 "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 "hw/s390x/pv.h" 23 #include "kvm_s390x.h" 24 25 int handle_diag_288(CPUS390XState *env, uint64_t r1, uint64_t r3) 26 { 27 uint64_t func = env->regs[r1]; 28 uint64_t timeout = env->regs[r1 + 1]; 29 uint64_t action = env->regs[r3]; 30 Object *obj; 31 DIAG288State *diag288; 32 DIAG288Class *diag288_class; 33 34 if (r1 % 2 || action != 0) { 35 return -1; 36 } 37 38 /* Timeout must be more than 15 seconds except for timer deletion */ 39 if (func != WDT_DIAG288_CANCEL && timeout < 15) { 40 return -1; 41 } 42 43 obj = object_resolve_path_type("", TYPE_WDT_DIAG288, NULL); 44 if (!obj) { 45 return -1; 46 } 47 48 diag288 = DIAG288(obj); 49 diag288_class = DIAG288_GET_CLASS(diag288); 50 return diag288_class->handle_timer(diag288, func, timeout); 51 } 52 53 static int diag308_parm_check(CPUS390XState *env, uint64_t r1, uint64_t addr, 54 uintptr_t ra, bool write) 55 { 56 /* Handled by the Ultravisor */ 57 if (s390_is_pv()) { 58 return 0; 59 } 60 if ((r1 & 1) || (addr & ~TARGET_PAGE_MASK)) { 61 s390_program_interrupt(env, PGM_SPECIFICATION, ra); 62 return -1; 63 } 64 if (!address_space_access_valid(&address_space_memory, addr, 65 sizeof(IplParameterBlock), write, 66 MEMTXATTRS_UNSPECIFIED)) { 67 s390_program_interrupt(env, PGM_ADDRESSING, ra); 68 return -1; 69 } 70 return 0; 71 } 72 73 void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra) 74 { 75 bool valid; 76 CPUState *cs = env_cpu(env); 77 S390CPU *cpu = S390_CPU(cs); 78 uint64_t addr = env->regs[r1]; 79 uint64_t subcode = env->regs[r3]; 80 IplParameterBlock *iplb; 81 82 if (env->psw.mask & PSW_MASK_PSTATE) { 83 s390_program_interrupt(env, PGM_PRIVILEGED, ra); 84 return; 85 } 86 87 if (subcode & ~0x0ffffULL) { 88 s390_program_interrupt(env, PGM_SPECIFICATION, ra); 89 return; 90 } 91 92 if (subcode >= DIAG308_PV_SET && !s390_has_feat(S390_FEAT_UNPACK)) { 93 s390_program_interrupt(env, PGM_SPECIFICATION, ra); 94 return; 95 } 96 97 switch (subcode) { 98 case DIAG308_RESET_MOD_CLR: 99 s390_ipl_reset_request(cs, S390_RESET_MODIFIED_CLEAR); 100 break; 101 case DIAG308_RESET_LOAD_NORM: 102 s390_ipl_reset_request(cs, S390_RESET_LOAD_NORMAL); 103 break; 104 case DIAG308_LOAD_CLEAR: 105 /* Well we still lack the clearing bit... */ 106 s390_ipl_reset_request(cs, S390_RESET_REIPL); 107 break; 108 case DIAG308_SET: 109 case DIAG308_PV_SET: 110 if (diag308_parm_check(env, r1, addr, ra, false)) { 111 return; 112 } 113 iplb = g_new0(IplParameterBlock, 1); 114 if (!s390_is_pv()) { 115 cpu_physical_memory_read(addr, iplb, sizeof(iplb->len)); 116 } else { 117 s390_cpu_pv_mem_read(cpu, 0, iplb, sizeof(iplb->len)); 118 } 119 120 if (!iplb_valid_len(iplb)) { 121 env->regs[r1 + 1] = DIAG_308_RC_INVALID; 122 goto out; 123 } 124 125 if (!s390_is_pv()) { 126 cpu_physical_memory_read(addr, iplb, be32_to_cpu(iplb->len)); 127 } else { 128 s390_cpu_pv_mem_read(cpu, 0, iplb, be32_to_cpu(iplb->len)); 129 } 130 131 valid = subcode == DIAG308_PV_SET ? iplb_valid_pv(iplb) : iplb_valid(iplb); 132 if (!valid) { 133 env->regs[r1 + 1] = DIAG_308_RC_INVALID; 134 goto out; 135 } 136 137 s390_ipl_update_diag308(iplb); 138 env->regs[r1 + 1] = DIAG_308_RC_OK; 139 out: 140 g_free(iplb); 141 return; 142 case DIAG308_STORE: 143 case DIAG308_PV_STORE: 144 if (diag308_parm_check(env, r1, addr, ra, true)) { 145 return; 146 } 147 if (subcode == DIAG308_PV_STORE) { 148 iplb = s390_ipl_get_iplb_pv(); 149 } else { 150 iplb = s390_ipl_get_iplb(); 151 } 152 if (!iplb) { 153 env->regs[r1 + 1] = DIAG_308_RC_NO_CONF; 154 return; 155 } 156 157 if (!s390_is_pv()) { 158 cpu_physical_memory_write(addr, iplb, be32_to_cpu(iplb->len)); 159 } else { 160 s390_cpu_pv_mem_write(cpu, 0, iplb, be32_to_cpu(iplb->len)); 161 } 162 env->regs[r1 + 1] = DIAG_308_RC_OK; 163 return; 164 case DIAG308_PV_START: 165 iplb = s390_ipl_get_iplb_pv(); 166 if (!iplb) { 167 env->regs[r1 + 1] = DIAG_308_RC_NO_PV_CONF; 168 return; 169 } 170 171 if (kvm_s390_get_hpage_1m()) { 172 error_report("Protected VMs can currently not be backed with " 173 "huge pages"); 174 env->regs[r1 + 1] = DIAG_308_RC_INVAL_FOR_PV; 175 return; 176 } 177 178 s390_ipl_reset_request(cs, S390_RESET_PV); 179 break; 180 default: 181 s390_program_interrupt(env, PGM_SPECIFICATION, ra); 182 break; 183 } 184 } 185