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74c21bd0 1#include "qemu/osdep.h"
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2#include "hw/hw.h"
3#include "hw/boards.h"
a7bf3034 4#include "qemu/error-report.h"
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5#include "sysemu/kvm.h"
6#include "kvm_arm.h"
9ee98ce8 7#include "internals.h"
1e00b8d5 8#include "migration/cpu.h"
8dd3dca3 9
3cc1d208 10static bool vfp_needed(void *opaque)
8dd3dca3 11{
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12 ARMCPU *cpu = opaque;
13 CPUARMState *env = &cpu->env;
8dd3dca3 14
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15 return arm_feature(env, ARM_FEATURE_VFP);
16}
8dd3dca3 17
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18static int get_fpscr(QEMUFile *f, void *opaque, size_t size)
19{
20 ARMCPU *cpu = opaque;
21 CPUARMState *env = &cpu->env;
22 uint32_t val = qemu_get_be32(f);
23
24 vfp_set_fpscr(env, val);
25 return 0;
26}
27
28static void put_fpscr(QEMUFile *f, void *opaque, size_t size)
29{
30 ARMCPU *cpu = opaque;
31 CPUARMState *env = &cpu->env;
32
33 qemu_put_be32(f, vfp_get_fpscr(env));
34}
35
36static const VMStateInfo vmstate_fpscr = {
37 .name = "fpscr",
38 .get = get_fpscr,
39 .put = put_fpscr,
40};
41
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42static const VMStateDescription vmstate_vfp = {
43 .name = "cpu/vfp",
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44 .version_id = 3,
45 .minimum_version_id = 3,
5cd8cada 46 .needed = vfp_needed,
3cc1d208 47 .fields = (VMStateField[]) {
3926cc84 48 VMSTATE_FLOAT64_ARRAY(env.vfp.regs, ARMCPU, 64),
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49 /* The xregs array is a little awkward because element 1 (FPSCR)
50 * requires a specific accessor, so we have to split it up in
51 * the vmstate:
52 */
53 VMSTATE_UINT32(env.vfp.xregs[0], ARMCPU),
54 VMSTATE_UINT32_SUB_ARRAY(env.vfp.xregs, ARMCPU, 2, 14),
55 {
56 .name = "fpscr",
57 .version_id = 0,
58 .size = sizeof(uint32_t),
59 .info = &vmstate_fpscr,
60 .flags = VMS_SINGLE,
61 .offset = 0,
62 },
3cc1d208 63 VMSTATE_END_OF_LIST()
8dd3dca3 64 }
3cc1d208 65};
8dd3dca3 66
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67static bool iwmmxt_needed(void *opaque)
68{
69 ARMCPU *cpu = opaque;
70 CPUARMState *env = &cpu->env;
8dd3dca3 71
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72 return arm_feature(env, ARM_FEATURE_IWMMXT);
73}
ffe47d33 74
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75static const VMStateDescription vmstate_iwmmxt = {
76 .name = "cpu/iwmmxt",
77 .version_id = 1,
78 .minimum_version_id = 1,
5cd8cada 79 .needed = iwmmxt_needed,
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80 .fields = (VMStateField[]) {
81 VMSTATE_UINT64_ARRAY(env.iwmmxt.regs, ARMCPU, 16),
82 VMSTATE_UINT32_ARRAY(env.iwmmxt.cregs, ARMCPU, 16),
83 VMSTATE_END_OF_LIST()
ffe47d33 84 }
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85};
86
87static bool m_needed(void *opaque)
88{
89 ARMCPU *cpu = opaque;
90 CPUARMState *env = &cpu->env;
91
92 return arm_feature(env, ARM_FEATURE_M);
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93}
94
6df05bdd 95static const VMStateDescription vmstate_m = {
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96 .name = "cpu/m",
97 .version_id = 1,
98 .minimum_version_id = 1,
5cd8cada 99 .needed = m_needed,
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100 .fields = (VMStateField[]) {
101 VMSTATE_UINT32(env.v7m.other_sp, ARMCPU),
102 VMSTATE_UINT32(env.v7m.vecbase, ARMCPU),
103 VMSTATE_UINT32(env.v7m.basepri, ARMCPU),
104 VMSTATE_UINT32(env.v7m.control, ARMCPU),
105 VMSTATE_INT32(env.v7m.current_sp, ARMCPU),
106 VMSTATE_INT32(env.v7m.exception, ARMCPU),
107 VMSTATE_END_OF_LIST()
108 }
109};
110
111static bool thumb2ee_needed(void *opaque)
8dd3dca3 112{
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113 ARMCPU *cpu = opaque;
114 CPUARMState *env = &cpu->env;
8dd3dca3 115
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116 return arm_feature(env, ARM_FEATURE_THUMB2EE);
117}
8dd3dca3 118
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119static const VMStateDescription vmstate_thumb2ee = {
120 .name = "cpu/thumb2ee",
121 .version_id = 1,
122 .minimum_version_id = 1,
5cd8cada 123 .needed = thumb2ee_needed,
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124 .fields = (VMStateField[]) {
125 VMSTATE_UINT32(env.teecr, ARMCPU),
126 VMSTATE_UINT32(env.teehbr, ARMCPU),
127 VMSTATE_END_OF_LIST()
8dd3dca3 128 }
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129};
130
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131static bool pmsav7_needed(void *opaque)
132{
133 ARMCPU *cpu = opaque;
134 CPUARMState *env = &cpu->env;
135
136 return arm_feature(env, ARM_FEATURE_MPU) &&
137 arm_feature(env, ARM_FEATURE_V7);
138}
139
140static bool pmsav7_rgnr_vmstate_validate(void *opaque, int version_id)
141{
142 ARMCPU *cpu = opaque;
143
144 return cpu->env.cp15.c6_rgnr < cpu->pmsav7_dregion;
145}
146
147static const VMStateDescription vmstate_pmsav7 = {
148 .name = "cpu/pmsav7",
149 .version_id = 1,
150 .minimum_version_id = 1,
151 .needed = pmsav7_needed,
152 .fields = (VMStateField[]) {
153 VMSTATE_VARRAY_UINT32(env.pmsav7.drbar, ARMCPU, pmsav7_dregion, 0,
154 vmstate_info_uint32, uint32_t),
155 VMSTATE_VARRAY_UINT32(env.pmsav7.drsr, ARMCPU, pmsav7_dregion, 0,
156 vmstate_info_uint32, uint32_t),
157 VMSTATE_VARRAY_UINT32(env.pmsav7.dracr, ARMCPU, pmsav7_dregion, 0,
158 vmstate_info_uint32, uint32_t),
159 VMSTATE_VALIDATE("rgnr is valid", pmsav7_rgnr_vmstate_validate),
160 VMSTATE_END_OF_LIST()
161 }
162};
163
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164static int get_cpsr(QEMUFile *f, void *opaque, size_t size)
165{
166 ARMCPU *cpu = opaque;
167 CPUARMState *env = &cpu->env;
168 uint32_t val = qemu_get_be32(f);
169
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170 env->aarch64 = ((val & PSTATE_nRW) == 0);
171
172 if (is_a64(env)) {
173 pstate_write(env, val);
174 return 0;
175 }
176
50866ba5 177 cpsr_write(env, val, 0xffffffff, CPSRWriteRaw);
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178 return 0;
179}
8dd3dca3 180
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181static void put_cpsr(QEMUFile *f, void *opaque, size_t size)
182{
183 ARMCPU *cpu = opaque;
184 CPUARMState *env = &cpu->env;
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185 uint32_t val;
186
187 if (is_a64(env)) {
188 val = pstate_read(env);
189 } else {
190 val = cpsr_read(env);
191 }
8dd3dca3 192
a7130a3e 193 qemu_put_be32(f, val);
3cc1d208 194}
8dd3dca3 195
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196static const VMStateInfo vmstate_cpsr = {
197 .name = "cpsr",
198 .get = get_cpsr,
199 .put = put_cpsr,
200};
201
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202static void cpu_pre_save(void *opaque)
203{
204 ARMCPU *cpu = opaque;
205
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206 if (kvm_enabled()) {
207 if (!write_kvmstate_to_list(cpu)) {
208 /* This should never fail */
209 abort();
210 }
211 } else {
212 if (!write_cpustate_to_list(cpu)) {
213 /* This should never fail. */
214 abort();
215 }
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216 }
217
218 cpu->cpreg_vmstate_array_len = cpu->cpreg_array_len;
219 memcpy(cpu->cpreg_vmstate_indexes, cpu->cpreg_indexes,
220 cpu->cpreg_array_len * sizeof(uint64_t));
221 memcpy(cpu->cpreg_vmstate_values, cpu->cpreg_values,
222 cpu->cpreg_array_len * sizeof(uint64_t));
223}
224
225static int cpu_post_load(void *opaque, int version_id)
226{
227 ARMCPU *cpu = opaque;
228 int i, v;
229
230 /* Update the values list from the incoming migration data.
231 * Anything in the incoming data which we don't know about is
232 * a migration failure; anything we know about but the incoming
233 * data doesn't specify retains its current (reset) value.
234 * The indexes list remains untouched -- we only inspect the
235 * incoming migration index list so we can match the values array
236 * entries with the right slots in our own values array.
237 */
238
239 for (i = 0, v = 0; i < cpu->cpreg_array_len
240 && v < cpu->cpreg_vmstate_array_len; i++) {
241 if (cpu->cpreg_vmstate_indexes[v] > cpu->cpreg_indexes[i]) {
242 /* register in our list but not incoming : skip it */
243 continue;
244 }
245 if (cpu->cpreg_vmstate_indexes[v] < cpu->cpreg_indexes[i]) {
246 /* register in their list but not ours: fail migration */
247 return -1;
248 }
249 /* matching register, copy the value over */
250 cpu->cpreg_values[i] = cpu->cpreg_vmstate_values[v];
251 v++;
252 }
253
ff047453 254 if (kvm_enabled()) {
4b7a6bf4 255 if (!write_list_to_kvmstate(cpu, KVM_PUT_FULL_STATE)) {
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256 return -1;
257 }
258 /* Note that it's OK for the TCG side not to know about
259 * every register in the list; KVM is authoritative if
260 * we're using it.
261 */
262 write_list_to_cpustate(cpu);
263 } else {
264 if (!write_list_to_cpustate(cpu)) {
265 return -1;
266 }
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267 }
268
46747d15 269 hw_breakpoint_update_all(cpu);
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270 hw_watchpoint_update_all(cpu);
271
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272 return 0;
273}
274
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275const VMStateDescription vmstate_arm_cpu = {
276 .name = "cpu",
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277 .version_id = 22,
278 .minimum_version_id = 22,
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279 .pre_save = cpu_pre_save,
280 .post_load = cpu_post_load,
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281 .fields = (VMStateField[]) {
282 VMSTATE_UINT32_ARRAY(env.regs, ARMCPU, 16),
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283 VMSTATE_UINT64_ARRAY(env.xregs, ARMCPU, 32),
284 VMSTATE_UINT64(env.pc, ARMCPU),
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285 {
286 .name = "cpsr",
287 .version_id = 0,
288 .size = sizeof(uint32_t),
289 .info = &vmstate_cpsr,
290 .flags = VMS_SINGLE,
291 .offset = 0,
292 },
293 VMSTATE_UINT32(env.spsr, ARMCPU),
28c9457d 294 VMSTATE_UINT64_ARRAY(env.banked_spsr, ARMCPU, 8),
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295 VMSTATE_UINT32_ARRAY(env.banked_r13, ARMCPU, 8),
296 VMSTATE_UINT32_ARRAY(env.banked_r14, ARMCPU, 8),
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297 VMSTATE_UINT32_ARRAY(env.usr_regs, ARMCPU, 5),
298 VMSTATE_UINT32_ARRAY(env.fiq_regs, ARMCPU, 5),
1b174238 299 VMSTATE_UINT64_ARRAY(env.elr_el, ARMCPU, 4),
73fb3b76 300 VMSTATE_UINT64_ARRAY(env.sp_el, ARMCPU, 4),
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301 /* The length-check must come before the arrays to avoid
302 * incoming data possibly overflowing the array.
303 */
3476436a 304 VMSTATE_INT32_POSITIVE_LE(cpreg_vmstate_array_len, ARMCPU),
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305 VMSTATE_VARRAY_INT32(cpreg_vmstate_indexes, ARMCPU,
306 cpreg_vmstate_array_len,
307 0, vmstate_info_uint64, uint64_t),
308 VMSTATE_VARRAY_INT32(cpreg_vmstate_values, ARMCPU,
309 cpreg_vmstate_array_len,
310 0, vmstate_info_uint64, uint64_t),
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311 VMSTATE_UINT64(env.exclusive_addr, ARMCPU),
312 VMSTATE_UINT64(env.exclusive_val, ARMCPU),
313 VMSTATE_UINT64(env.exclusive_high, ARMCPU),
3cc1d208 314 VMSTATE_UINT64(env.features, ARMCPU),
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315 VMSTATE_UINT32(env.exception.syndrome, ARMCPU),
316 VMSTATE_UINT32(env.exception.fsr, ARMCPU),
317 VMSTATE_UINT64(env.exception.vaddress, ARMCPU),
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318 VMSTATE_TIMER_PTR(gt_timer[GTIMER_PHYS], ARMCPU),
319 VMSTATE_TIMER_PTR(gt_timer[GTIMER_VIRT], ARMCPU),
543486db 320 VMSTATE_BOOL(powered_off, ARMCPU),
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321 VMSTATE_END_OF_LIST()
322 },
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323 .subsections = (const VMStateDescription*[]) {
324 &vmstate_vfp,
325 &vmstate_iwmmxt,
326 &vmstate_m,
327 &vmstate_thumb2ee,
6cb0b013 328 &vmstate_pmsav7,
5cd8cada 329 NULL
ffe47d33 330 }
3cc1d208 331};
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332
333const char *gicv3_class_name(void)
334{
335 if (kvm_irqchip_in_kernel()) {
336#ifdef TARGET_AARCH64
337 return "kvm-arm-gicv3";
338#else
339 error_report("KVM GICv3 acceleration is not supported on this "
9af9e0fe 340 "platform");
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341#endif
342 } else {
343 /* TODO: Software emulation is not implemented yet */
9af9e0fe 344 error_report("KVM is currently required for GICv3 emulation");
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345 }
346
347 exit(1);
348}
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