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1 | 8cb310e1 | Alexander Graf | /*
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2 | 8cb310e1 | Alexander Graf | * QEMU S390 virtio target
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3 | 8cb310e1 | Alexander Graf | *
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4 | 8cb310e1 | Alexander Graf | * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
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5 | 904e5fd5 | Viktor Mihajlovski | * Copyright IBM Corp 2012
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6 | 8cb310e1 | Alexander Graf | *
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7 | 8cb310e1 | Alexander Graf | * This library is free software; you can redistribute it and/or
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8 | 8cb310e1 | Alexander Graf | * modify it under the terms of the GNU Lesser General Public
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9 | 8cb310e1 | Alexander Graf | * License as published by the Free Software Foundation; either
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10 | 8cb310e1 | Alexander Graf | * version 2 of the License, or (at your option) any later version.
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11 | 8cb310e1 | Alexander Graf | *
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12 | 8cb310e1 | Alexander Graf | * This library is distributed in the hope that it will be useful,
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13 | 8cb310e1 | Alexander Graf | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | 8cb310e1 | Alexander Graf | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 | 8cb310e1 | Alexander Graf | * Lesser General Public License for more details.
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16 | 8cb310e1 | Alexander Graf | *
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17 | 904e5fd5 | Viktor Mihajlovski | * Contributions after 2012-10-29 are licensed under the terms of the
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18 | 904e5fd5 | Viktor Mihajlovski | * GNU GPL, version 2 or (at your option) any later version.
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19 | 904e5fd5 | Viktor Mihajlovski | *
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20 | 904e5fd5 | Viktor Mihajlovski | * You should have received a copy of the GNU (Lesser) General Public
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21 | 8cb310e1 | Alexander Graf | * License along with this library; if not, see <http://www.gnu.org/licenses/>.
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22 | 8cb310e1 | Alexander Graf | */
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23 | 8cb310e1 | Alexander Graf | |
24 | b73d3531 | Alexander Graf | #include "hw/hw.h" |
25 | 737e150e | Paolo Bonzini | #include "block/block.h" |
26 | 9c17d615 | Paolo Bonzini | #include "sysemu/blockdev.h" |
27 | 9c17d615 | Paolo Bonzini | #include "sysemu/sysemu.h" |
28 | 1422e32d | Paolo Bonzini | #include "net/net.h" |
29 | b73d3531 | Alexander Graf | #include "hw/boards.h" |
30 | 83c9089e | Paolo Bonzini | #include "monitor/monitor.h" |
31 | b73d3531 | Alexander Graf | #include "hw/loader.h" |
32 | 0d09e41a | Paolo Bonzini | #include "hw/virtio/virtio.h" |
33 | 8cb310e1 | Alexander Graf | #include "hw/sysbus.h" |
34 | 9c17d615 | Paolo Bonzini | #include "sysemu/kvm.h" |
35 | 022c62cb | Paolo Bonzini | #include "exec/address-spaces.h" |
36 | 8cb310e1 | Alexander Graf | |
37 | b73d3531 | Alexander Graf | #include "hw/s390x/s390-virtio-bus.h" |
38 | 559a17a1 | Heinz Graalfs | #include "hw/s390x/sclp.h" |
39 | b73d3531 | Alexander Graf | #include "hw/s390x/s390-virtio.h" |
40 | 8cb310e1 | Alexander Graf | |
41 | 8cb310e1 | Alexander Graf | //#define DEBUG_S390
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42 | 8cb310e1 | Alexander Graf | |
43 | 8cb310e1 | Alexander Graf | #ifdef DEBUG_S390
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44 | 8cb310e1 | Alexander Graf | #define dprintf(fmt, ...) \
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45 | 8cb310e1 | Alexander Graf | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
46 | 8cb310e1 | Alexander Graf | #else
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47 | 8cb310e1 | Alexander Graf | #define dprintf(fmt, ...) \
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48 | 8cb310e1 | Alexander Graf | do { } while (0) |
49 | 8cb310e1 | Alexander Graf | #endif
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50 | 8cb310e1 | Alexander Graf | |
51 | 8cb310e1 | Alexander Graf | #define MAX_BLK_DEVS 10 |
52 | 8cb310e1 | Alexander Graf | |
53 | 8cb310e1 | Alexander Graf | static VirtIOS390Bus *s390_bus;
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54 | 45fa769b | Andreas Färber | static S390CPU **ipi_states;
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55 | 8cb310e1 | Alexander Graf | |
56 | 45fa769b | Andreas Färber | S390CPU *s390_cpu_addr2state(uint16_t cpu_addr) |
57 | 8cb310e1 | Alexander Graf | { |
58 | 8cb310e1 | Alexander Graf | if (cpu_addr >= smp_cpus) {
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59 | 8cb310e1 | Alexander Graf | return NULL; |
60 | 8cb310e1 | Alexander Graf | } |
61 | 8cb310e1 | Alexander Graf | |
62 | 8cb310e1 | Alexander Graf | return ipi_states[cpu_addr];
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63 | 8cb310e1 | Alexander Graf | } |
64 | 8cb310e1 | Alexander Graf | |
65 | 28e942f8 | Cornelia Huck | static int s390_virtio_hcall_notify(const uint64_t *args) |
66 | 8cb310e1 | Alexander Graf | { |
67 | 28e942f8 | Cornelia Huck | uint64_t mem = args[0];
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68 | 8cb310e1 | Alexander Graf | int r = 0, i; |
69 | 8cb310e1 | Alexander Graf | |
70 | 28e942f8 | Cornelia Huck | if (mem > ram_size) {
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71 | 28e942f8 | Cornelia Huck | VirtIOS390Device *dev = s390_virtio_bus_find_vring(s390_bus, mem, &i); |
72 | 8cb310e1 | Alexander Graf | if (dev) {
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73 | 28e942f8 | Cornelia Huck | virtio_queue_notify(dev->vdev, i); |
74 | 8cb310e1 | Alexander Graf | } else {
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75 | 8cb310e1 | Alexander Graf | r = -EINVAL; |
76 | 8cb310e1 | Alexander Graf | } |
77 | 28e942f8 | Cornelia Huck | } else {
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78 | 28e942f8 | Cornelia Huck | /* Early printk */
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79 | 8cb310e1 | Alexander Graf | } |
80 | 28e942f8 | Cornelia Huck | return r;
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81 | 28e942f8 | Cornelia Huck | } |
82 | 28e942f8 | Cornelia Huck | |
83 | 28e942f8 | Cornelia Huck | static int s390_virtio_hcall_reset(const uint64_t *args) |
84 | 28e942f8 | Cornelia Huck | { |
85 | 28e942f8 | Cornelia Huck | uint64_t mem = args[0];
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86 | 28e942f8 | Cornelia Huck | VirtIOS390Device *dev; |
87 | 28e942f8 | Cornelia Huck | |
88 | 28e942f8 | Cornelia Huck | dev = s390_virtio_bus_find_mem(s390_bus, mem); |
89 | ab290630 | Andreas Färber | if (dev == NULL) { |
90 | ab290630 | Andreas Färber | return -EINVAL;
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91 | ab290630 | Andreas Färber | } |
92 | 28e942f8 | Cornelia Huck | virtio_reset(dev->vdev); |
93 | 28e942f8 | Cornelia Huck | stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_STATUS, 0);
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94 | 28e942f8 | Cornelia Huck | s390_virtio_device_sync(dev); |
95 | 28e942f8 | Cornelia Huck | s390_virtio_reset_idx(dev); |
96 | 28e942f8 | Cornelia Huck | |
97 | 28e942f8 | Cornelia Huck | return 0; |
98 | 28e942f8 | Cornelia Huck | } |
99 | 28e942f8 | Cornelia Huck | |
100 | 28e942f8 | Cornelia Huck | static int s390_virtio_hcall_set_status(const uint64_t *args) |
101 | 28e942f8 | Cornelia Huck | { |
102 | 28e942f8 | Cornelia Huck | uint64_t mem = args[0];
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103 | 28e942f8 | Cornelia Huck | int r = 0; |
104 | 28e942f8 | Cornelia Huck | VirtIOS390Device *dev; |
105 | 28e942f8 | Cornelia Huck | |
106 | 28e942f8 | Cornelia Huck | dev = s390_virtio_bus_find_mem(s390_bus, mem); |
107 | 28e942f8 | Cornelia Huck | if (dev) {
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108 | 28e942f8 | Cornelia Huck | s390_virtio_device_update_status(dev); |
109 | 28e942f8 | Cornelia Huck | } else {
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110 | 8cb310e1 | Alexander Graf | r = -EINVAL; |
111 | 8cb310e1 | Alexander Graf | } |
112 | 8d5192ee | Alexander Graf | return r;
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113 | 8cb310e1 | Alexander Graf | } |
114 | 8cb310e1 | Alexander Graf | |
115 | 28e942f8 | Cornelia Huck | static void s390_virtio_register_hcalls(void) |
116 | 28e942f8 | Cornelia Huck | { |
117 | 28e942f8 | Cornelia Huck | s390_register_virtio_hypercall(KVM_S390_VIRTIO_NOTIFY, |
118 | 28e942f8 | Cornelia Huck | s390_virtio_hcall_notify); |
119 | 28e942f8 | Cornelia Huck | s390_register_virtio_hypercall(KVM_S390_VIRTIO_RESET, |
120 | 28e942f8 | Cornelia Huck | s390_virtio_hcall_reset); |
121 | 28e942f8 | Cornelia Huck | s390_register_virtio_hypercall(KVM_S390_VIRTIO_SET_STATUS, |
122 | 28e942f8 | Cornelia Huck | s390_virtio_hcall_set_status); |
123 | 28e942f8 | Cornelia Huck | } |
124 | 28e942f8 | Cornelia Huck | |
125 | 854e42f3 | Christian Borntraeger | /*
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126 | 854e42f3 | Christian Borntraeger | * The number of running CPUs. On s390 a shutdown is the state of all CPUs
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127 | 854e42f3 | Christian Borntraeger | * being either stopped or disabled (for interrupts) waiting. We have to
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128 | 854e42f3 | Christian Borntraeger | * track this number to call the shutdown sequence accordingly. This
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129 | 854e42f3 | Christian Borntraeger | * number is modified either on startup or while holding the big qemu lock.
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130 | 854e42f3 | Christian Borntraeger | */
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131 | 854e42f3 | Christian Borntraeger | static unsigned s390_running_cpus; |
132 | 854e42f3 | Christian Borntraeger | |
133 | 49e15878 | Andreas Färber | void s390_add_running_cpu(S390CPU *cpu)
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134 | 854e42f3 | Christian Borntraeger | { |
135 | 259186a7 | Andreas Färber | CPUState *cs = CPU(cpu); |
136 | 49e15878 | Andreas Färber | CPUS390XState *env = &cpu->env; |
137 | 49e15878 | Andreas Färber | |
138 | 259186a7 | Andreas Färber | if (cs->halted) {
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139 | 854e42f3 | Christian Borntraeger | s390_running_cpus++; |
140 | 259186a7 | Andreas Färber | cs->halted = 0;
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141 | 854e42f3 | Christian Borntraeger | env->exception_index = -1;
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142 | 854e42f3 | Christian Borntraeger | } |
143 | 854e42f3 | Christian Borntraeger | } |
144 | 854e42f3 | Christian Borntraeger | |
145 | 49e15878 | Andreas Färber | unsigned s390_del_running_cpu(S390CPU *cpu)
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146 | 854e42f3 | Christian Borntraeger | { |
147 | 259186a7 | Andreas Färber | CPUState *cs = CPU(cpu); |
148 | 49e15878 | Andreas Färber | CPUS390XState *env = &cpu->env; |
149 | 49e15878 | Andreas Färber | |
150 | 259186a7 | Andreas Färber | if (cs->halted == 0) { |
151 | 854e42f3 | Christian Borntraeger | assert(s390_running_cpus >= 1);
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152 | 854e42f3 | Christian Borntraeger | s390_running_cpus--; |
153 | 259186a7 | Andreas Färber | cs->halted = 1;
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154 | 854e42f3 | Christian Borntraeger | env->exception_index = EXCP_HLT; |
155 | 854e42f3 | Christian Borntraeger | } |
156 | 854e42f3 | Christian Borntraeger | return s390_running_cpus;
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157 | 854e42f3 | Christian Borntraeger | } |
158 | 854e42f3 | Christian Borntraeger | |
159 | fad37673 | Cornelia Huck | void s390_init_ipl_dev(const char *kernel_filename, |
160 | fad37673 | Cornelia Huck | const char *kernel_cmdline, |
161 | fad37673 | Cornelia Huck | const char *initrd_filename) |
162 | fad37673 | Cornelia Huck | { |
163 | fad37673 | Cornelia Huck | DeviceState *dev; |
164 | fad37673 | Cornelia Huck | |
165 | fad37673 | Cornelia Huck | dev = qdev_create(NULL, "s390-ipl"); |
166 | fad37673 | Cornelia Huck | if (kernel_filename) {
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167 | fad37673 | Cornelia Huck | qdev_prop_set_string(dev, "kernel", kernel_filename);
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168 | fad37673 | Cornelia Huck | } |
169 | fad37673 | Cornelia Huck | if (initrd_filename) {
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170 | fad37673 | Cornelia Huck | qdev_prop_set_string(dev, "initrd", initrd_filename);
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171 | fad37673 | Cornelia Huck | } |
172 | fad37673 | Cornelia Huck | qdev_prop_set_string(dev, "cmdline", kernel_cmdline);
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173 | fad37673 | Cornelia Huck | qdev_init_nofail(dev); |
174 | fad37673 | Cornelia Huck | } |
175 | fad37673 | Cornelia Huck | |
176 | fad37673 | Cornelia Huck | void s390_init_cpus(const char *cpu_model, uint8_t *storage_keys) |
177 | fad37673 | Cornelia Huck | { |
178 | fad37673 | Cornelia Huck | int i;
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179 | fad37673 | Cornelia Huck | |
180 | fad37673 | Cornelia Huck | if (cpu_model == NULL) { |
181 | fad37673 | Cornelia Huck | cpu_model = "host";
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182 | fad37673 | Cornelia Huck | } |
183 | fad37673 | Cornelia Huck | |
184 | fad37673 | Cornelia Huck | ipi_states = g_malloc(sizeof(S390CPU *) * smp_cpus);
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185 | fad37673 | Cornelia Huck | |
186 | fad37673 | Cornelia Huck | for (i = 0; i < smp_cpus; i++) { |
187 | fad37673 | Cornelia Huck | S390CPU *cpu; |
188 | 259186a7 | Andreas Färber | CPUState *cs; |
189 | fad37673 | Cornelia Huck | |
190 | fad37673 | Cornelia Huck | cpu = cpu_s390x_init(cpu_model); |
191 | 259186a7 | Andreas Färber | cs = CPU(cpu); |
192 | fad37673 | Cornelia Huck | |
193 | fad37673 | Cornelia Huck | ipi_states[i] = cpu; |
194 | 259186a7 | Andreas Färber | cs->halted = 1;
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195 | fad37673 | Cornelia Huck | cpu->env.exception_index = EXCP_HLT; |
196 | fad37673 | Cornelia Huck | cpu->env.storage_keys = storage_keys; |
197 | fad37673 | Cornelia Huck | } |
198 | fad37673 | Cornelia Huck | } |
199 | fad37673 | Cornelia Huck | |
200 | fad37673 | Cornelia Huck | |
201 | fad37673 | Cornelia Huck | void s390_create_virtio_net(BusState *bus, const char *name) |
202 | fad37673 | Cornelia Huck | { |
203 | fad37673 | Cornelia Huck | int i;
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204 | fad37673 | Cornelia Huck | |
205 | fad37673 | Cornelia Huck | for (i = 0; i < nb_nics; i++) { |
206 | fad37673 | Cornelia Huck | NICInfo *nd = &nd_table[i]; |
207 | fad37673 | Cornelia Huck | DeviceState *dev; |
208 | fad37673 | Cornelia Huck | |
209 | fad37673 | Cornelia Huck | if (!nd->model) {
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210 | fad37673 | Cornelia Huck | nd->model = g_strdup("virtio");
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211 | fad37673 | Cornelia Huck | } |
212 | fad37673 | Cornelia Huck | |
213 | fad37673 | Cornelia Huck | if (strcmp(nd->model, "virtio")) { |
214 | fad37673 | Cornelia Huck | fprintf(stderr, "S390 only supports VirtIO nics\n");
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215 | fad37673 | Cornelia Huck | exit(1);
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216 | fad37673 | Cornelia Huck | } |
217 | fad37673 | Cornelia Huck | |
218 | fad37673 | Cornelia Huck | dev = qdev_create(bus, name); |
219 | fad37673 | Cornelia Huck | qdev_set_nic_properties(dev, nd); |
220 | fad37673 | Cornelia Huck | qdev_init_nofail(dev); |
221 | fad37673 | Cornelia Huck | } |
222 | fad37673 | Cornelia Huck | } |
223 | fad37673 | Cornelia Huck | |
224 | 8cb310e1 | Alexander Graf | /* PC hardware initialisation */
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225 | 5f072e1f | Eduardo Habkost | static void s390_init(QEMUMachineInitArgs *args) |
226 | 8cb310e1 | Alexander Graf | { |
227 | 5f072e1f | Eduardo Habkost | ram_addr_t my_ram_size = args->ram_size; |
228 | ca3dbc27 | Avi Kivity | MemoryRegion *sysmem = get_system_memory(); |
229 | ca3dbc27 | Avi Kivity | MemoryRegion *ram = g_new(MemoryRegion, 1);
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230 | 22486aa0 | Christian Borntraeger | int shift = 0; |
231 | 8d5192ee | Alexander Graf | uint8_t *storage_keys; |
232 | 326384d5 | Alexander Graf | void *virtio_region;
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233 | a8170e5e | Avi Kivity | hwaddr virtio_region_len; |
234 | a8170e5e | Avi Kivity | hwaddr virtio_region_start; |
235 | 8cb310e1 | Alexander Graf | |
236 | 22486aa0 | Christian Borntraeger | /* s390x ram size detection needs a 16bit multiplier + an increment. So
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237 | 22486aa0 | Christian Borntraeger | guests > 64GB can be specified in 2MB steps etc. */
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238 | 22486aa0 | Christian Borntraeger | while ((my_ram_size >> (20 + shift)) > 65535) { |
239 | 22486aa0 | Christian Borntraeger | shift++; |
240 | 22486aa0 | Christian Borntraeger | } |
241 | 22486aa0 | Christian Borntraeger | my_ram_size = my_ram_size >> (20 + shift) << (20 + shift); |
242 | 22486aa0 | Christian Borntraeger | |
243 | 22486aa0 | Christian Borntraeger | /* lets propagate the changed ram size into the global variable. */
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244 | 22486aa0 | Christian Borntraeger | ram_size = my_ram_size; |
245 | e249651c | Alexander Graf | |
246 | 8cb310e1 | Alexander Graf | /* get a BUS */
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247 | 22486aa0 | Christian Borntraeger | s390_bus = s390_virtio_bus_init(&my_ram_size); |
248 | 559a17a1 | Heinz Graalfs | s390_sclp_init(); |
249 | fad37673 | Cornelia Huck | s390_init_ipl_dev(args->kernel_filename, args->kernel_cmdline, |
250 | fad37673 | Cornelia Huck | args->initrd_filename); |
251 | 8cb310e1 | Alexander Graf | |
252 | 28e942f8 | Cornelia Huck | /* register hypercalls */
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253 | 28e942f8 | Cornelia Huck | s390_virtio_register_hcalls(); |
254 | 28e942f8 | Cornelia Huck | |
255 | 8cb310e1 | Alexander Graf | /* allocate RAM */
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256 | c5705a77 | Avi Kivity | memory_region_init_ram(ram, "s390.ram", my_ram_size);
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257 | c5705a77 | Avi Kivity | vmstate_register_ram_global(ram); |
258 | ca3dbc27 | Avi Kivity | memory_region_add_subregion(sysmem, 0, ram);
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259 | 8cb310e1 | Alexander Graf | |
260 | 326384d5 | Alexander Graf | /* clear virtio region */
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261 | 326384d5 | Alexander Graf | virtio_region_len = my_ram_size - ram_size; |
262 | 326384d5 | Alexander Graf | virtio_region_start = ram_size; |
263 | 326384d5 | Alexander Graf | virtio_region = cpu_physical_memory_map(virtio_region_start, |
264 | 326384d5 | Alexander Graf | &virtio_region_len, true);
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265 | 326384d5 | Alexander Graf | memset(virtio_region, 0, virtio_region_len);
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266 | 326384d5 | Alexander Graf | cpu_physical_memory_unmap(virtio_region, virtio_region_len, 1,
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267 | 326384d5 | Alexander Graf | virtio_region_len); |
268 | 326384d5 | Alexander Graf | |
269 | 8d5192ee | Alexander Graf | /* allocate storage keys */
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270 | 7267c094 | Anthony Liguori | storage_keys = g_malloc0(my_ram_size / TARGET_PAGE_SIZE); |
271 | 8d5192ee | Alexander Graf | |
272 | 8cb310e1 | Alexander Graf | /* init CPUs */
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273 | fad37673 | Cornelia Huck | s390_init_cpus(args->cpu_model, storage_keys); |
274 | 8cb310e1 | Alexander Graf | |
275 | 8cb310e1 | Alexander Graf | /* Create VirtIO network adapters */
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276 | fad37673 | Cornelia Huck | s390_create_virtio_net((BusState *)s390_bus, "virtio-net-s390");
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277 | 8cb310e1 | Alexander Graf | } |
278 | 8cb310e1 | Alexander Graf | |
279 | 8cb310e1 | Alexander Graf | static QEMUMachine s390_machine = {
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280 | 8cb310e1 | Alexander Graf | .name = "s390-virtio",
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281 | 8cb310e1 | Alexander Graf | .alias = "s390",
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282 | 8cb310e1 | Alexander Graf | .desc = "VirtIO based S390 machine",
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283 | 8cb310e1 | Alexander Graf | .init = s390_init, |
284 | 2d0d2837 | Christian Borntraeger | .block_default_type = IF_VIRTIO, |
285 | ad0bbc56 | Einar Lueck | .no_cdrom = 1,
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286 | ad0bbc56 | Einar Lueck | .no_floppy = 1,
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287 | 986c5f78 | Gerd Hoffmann | .no_serial = 1,
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288 | 986c5f78 | Gerd Hoffmann | .no_parallel = 1,
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289 | ad0bbc56 | Einar Lueck | .no_sdcard = 1,
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290 | cf708987 | Michael S. Tsirkin | .use_virtcon = 1,
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291 | 8cb310e1 | Alexander Graf | .max_cpus = 255,
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292 | 8cb310e1 | Alexander Graf | .is_default = 1,
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293 | e4ada29e | Avik Sil | DEFAULT_MACHINE_OPTIONS, |
294 | 8cb310e1 | Alexander Graf | }; |
295 | 8cb310e1 | Alexander Graf | |
296 | 8cb310e1 | Alexander Graf | static void s390_machine_init(void) |
297 | 8cb310e1 | Alexander Graf | { |
298 | 8cb310e1 | Alexander Graf | qemu_register_machine(&s390_machine); |
299 | 8cb310e1 | Alexander Graf | } |
300 | 8cb310e1 | Alexander Graf | |
301 | 8cb310e1 | Alexander Graf | machine_init(s390_machine_init); |