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 "hw/s390x/pv.h" 23 #include "sysemu/kvm.h" 24 #include "kvm/kvm_s390x.h" 25 26 int handle_diag_288(CPUS390XState *env, uint64_t r1, uint64_t r3) 27 { 28 uint64_t func = env->regs[r1]; 29 uint64_t timeout = env->regs[r1 + 1]; 30 uint64_t action = env->regs[r3]; 31 Object *obj; 32 DIAG288State *diag288; 33 DIAG288Class *diag288_class; 34 35 if (r1 % 2 || action != 0) { 36 return -1; 37 } 38 39 /* Timeout must be more than 15 seconds except for timer deletion */ 40 if (func != WDT_DIAG288_CANCEL && timeout < 15) { 41 return -1; 42 } 43 44 obj = object_resolve_path_type("", TYPE_WDT_DIAG288, NULL); 45 if (!obj) { 46 return -1; 47 } 48 49 diag288 = DIAG288(obj); 50 diag288_class = DIAG288_GET_CLASS(diag288); 51 return diag288_class->handle_timer(diag288, func, timeout); 52 } 53 54 static int diag308_parm_check(CPUS390XState *env, uint64_t r1, uint64_t addr, 55 uintptr_t ra, bool write) 56 { 57 /* Handled by the Ultravisor */ 58 if (s390_is_pv()) { 59 return 0; 60 } 61 if ((r1 & 1) || (addr & ~TARGET_PAGE_MASK)) { 62 s390_program_interrupt(env, PGM_SPECIFICATION, ra); 63 return -1; 64 } 65 if (!address_space_access_valid(&address_space_memory, addr, 66 sizeof(IplParameterBlock), write, 67 MEMTXATTRS_UNSPECIFIED)) { 68 s390_program_interrupt(env, PGM_ADDRESSING, ra); 69 return -1; 70 } 71 return 0; 72 } 73 74 void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra) 75 { 76 bool valid; 77 CPUState *cs = env_cpu(env); 78 S390CPU *cpu = S390_CPU(cs); 79 uint64_t addr = env->regs[r1]; 80 uint64_t subcode = env->regs[r3]; 81 IplParameterBlock *iplb; 82 83 if (env->psw.mask & PSW_MASK_PSTATE) { 84 s390_program_interrupt(env, PGM_PRIVILEGED, ra); 85 return; 86 } 87 88 if (subcode & ~0x0ffffULL) { 89 s390_program_interrupt(env, PGM_SPECIFICATION, ra); 90 return; 91 } 92 93 if (subcode >= DIAG308_PV_SET && !s390_has_feat(S390_FEAT_UNPACK)) { 94 s390_program_interrupt(env, PGM_SPECIFICATION, ra); 95 return; 96 } 97 98 switch (subcode) { 99 case DIAG308_RESET_MOD_CLR: 100 s390_ipl_reset_request(cs, S390_RESET_MODIFIED_CLEAR); 101 break; 102 case DIAG308_RESET_LOAD_NORM: 103 s390_ipl_reset_request(cs, S390_RESET_LOAD_NORMAL); 104 break; 105 case DIAG308_LOAD_CLEAR: 106 /* Well we still lack the clearing bit... */ 107 s390_ipl_reset_request(cs, S390_RESET_REIPL); 108 break; 109 case DIAG308_SET: 110 case DIAG308_PV_SET: 111 if (diag308_parm_check(env, r1, addr, ra, false)) { 112 return; 113 } 114 iplb = g_new0(IplParameterBlock, 1); 115 if (!s390_is_pv()) { 116 cpu_physical_memory_read(addr, iplb, sizeof(iplb->len)); 117 } else { 118 s390_cpu_pv_mem_read(cpu, 0, iplb, sizeof(iplb->len)); 119 } 120 121 if (!iplb_valid_len(iplb)) { 122 env->regs[r1 + 1] = DIAG_308_RC_INVALID; 123 goto out; 124 } 125 126 if (!s390_is_pv()) { 127 cpu_physical_memory_read(addr, iplb, be32_to_cpu(iplb->len)); 128 } else { 129 s390_cpu_pv_mem_read(cpu, 0, iplb, be32_to_cpu(iplb->len)); 130 } 131 132 valid = subcode == DIAG308_PV_SET ? iplb_valid_pv(iplb) : iplb_valid(iplb); 133 if (!valid) { 134 env->regs[r1 + 1] = DIAG_308_RC_INVALID; 135 goto out; 136 } 137 138 s390_ipl_update_diag308(iplb); 139 env->regs[r1 + 1] = DIAG_308_RC_OK; 140 out: 141 g_free(iplb); 142 return; 143 case DIAG308_STORE: 144 case DIAG308_PV_STORE: 145 if (diag308_parm_check(env, r1, addr, ra, true)) { 146 return; 147 } 148 if (subcode == DIAG308_PV_STORE) { 149 iplb = s390_ipl_get_iplb_pv(); 150 } else { 151 iplb = s390_ipl_get_iplb(); 152 } 153 if (!iplb) { 154 env->regs[r1 + 1] = DIAG_308_RC_NO_CONF; 155 return; 156 } 157 158 if (!s390_is_pv()) { 159 cpu_physical_memory_write(addr, iplb, be32_to_cpu(iplb->len)); 160 } else { 161 s390_cpu_pv_mem_write(cpu, 0, iplb, be32_to_cpu(iplb->len)); 162 } 163 env->regs[r1 + 1] = DIAG_308_RC_OK; 164 return; 165 case DIAG308_PV_START: 166 iplb = s390_ipl_get_iplb_pv(); 167 if (!iplb) { 168 env->regs[r1 + 1] = DIAG_308_RC_NO_PV_CONF; 169 return; 170 } 171 172 if (kvm_enabled() && kvm_s390_get_hpage_1m()) { 173 error_report("Protected VMs can currently not be backed with " 174 "huge pages"); 175 env->regs[r1 + 1] = DIAG_308_RC_INVAL_FOR_PV; 176 return; 177 } 178 179 s390_ipl_reset_request(cs, S390_RESET_PV); 180 break; 181 default: 182 s390_program_interrupt(env, PGM_SPECIFICATION, ra); 183 break; 184 } 185 } 186