Update version for v6.2.0-rc4 release
[qemu.git] / target / s390x / diag.c
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 }