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0c3e702a | 1 | /* |
df354dd4 | 2 | * RISC-V CPU helpers for qemu. |
0c3e702a MC |
3 | * |
4 | * Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu | |
5 | * Copyright (c) 2017-2018 SiFive, Inc. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms and conditions of the GNU General Public License, | |
9 | * version 2 or later, as published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope it will be useful, but WITHOUT | |
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | * more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along with | |
17 | * this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include "qemu/osdep.h" | |
21 | #include "qemu/log.h" | |
7ec5d303 | 22 | #include "qemu/main-loop.h" |
0c3e702a MC |
23 | #include "cpu.h" |
24 | #include "exec/exec-all.h" | |
dcb32f1d | 25 | #include "tcg/tcg-op.h" |
929f0a7f | 26 | #include "trace.h" |
0c3e702a MC |
27 | |
28 | int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch) | |
29 | { | |
30 | #ifdef CONFIG_USER_ONLY | |
31 | return 0; | |
32 | #else | |
33 | return env->priv; | |
34 | #endif | |
35 | } | |
36 | ||
37 | #ifndef CONFIG_USER_ONLY | |
efbdbc26 | 38 | static int riscv_cpu_local_irq_pending(CPURISCVState *env) |
0c3e702a | 39 | { |
3ef10a09 AF |
40 | target_ulong irqs; |
41 | ||
efbdbc26 MC |
42 | target_ulong mstatus_mie = get_field(env->mstatus, MSTATUS_MIE); |
43 | target_ulong mstatus_sie = get_field(env->mstatus, MSTATUS_SIE); | |
3ef10a09 AF |
44 | target_ulong hs_mstatus_sie = get_field(env->mstatus_hs, MSTATUS_SIE); |
45 | ||
46 | target_ulong pending = env->mip & env->mie & | |
47 | ~(MIP_VSSIP | MIP_VSTIP | MIP_VSEIP); | |
48 | target_ulong vspending = (env->mip & env->mie & | |
c5969a3a | 49 | (MIP_VSSIP | MIP_VSTIP | MIP_VSEIP)); |
3ef10a09 AF |
50 | |
51 | target_ulong mie = env->priv < PRV_M || | |
52 | (env->priv == PRV_M && mstatus_mie); | |
53 | target_ulong sie = env->priv < PRV_S || | |
54 | (env->priv == PRV_S && mstatus_sie); | |
55 | target_ulong hs_sie = env->priv < PRV_S || | |
56 | (env->priv == PRV_S && hs_mstatus_sie); | |
57 | ||
58 | if (riscv_cpu_virt_enabled(env)) { | |
59 | target_ulong pending_hs_irq = pending & -hs_sie; | |
60 | ||
61 | if (pending_hs_irq) { | |
62 | riscv_cpu_set_force_hs_excep(env, FORCE_HS_EXCEP); | |
63 | return ctz64(pending_hs_irq); | |
64 | } | |
65 | ||
66 | pending = vspending; | |
67 | } | |
68 | ||
69 | irqs = (pending & ~env->mideleg & -mie) | (pending & env->mideleg & -sie); | |
0c3e702a | 70 | |
efbdbc26 MC |
71 | if (irqs) { |
72 | return ctz64(irqs); /* since non-zero */ | |
0c3e702a MC |
73 | } else { |
74 | return EXCP_NONE; /* indicates no pending interrupt */ | |
75 | } | |
76 | } | |
77 | #endif | |
78 | ||
79 | bool riscv_cpu_exec_interrupt(CPUState *cs, int interrupt_request) | |
80 | { | |
81 | #if !defined(CONFIG_USER_ONLY) | |
82 | if (interrupt_request & CPU_INTERRUPT_HARD) { | |
83 | RISCVCPU *cpu = RISCV_CPU(cs); | |
84 | CPURISCVState *env = &cpu->env; | |
efbdbc26 | 85 | int interruptno = riscv_cpu_local_irq_pending(env); |
0c3e702a MC |
86 | if (interruptno >= 0) { |
87 | cs->exception_index = RISCV_EXCP_INT_FLAG | interruptno; | |
88 | riscv_cpu_do_interrupt(cs); | |
89 | return true; | |
90 | } | |
91 | } | |
92 | #endif | |
93 | return false; | |
94 | } | |
95 | ||
96 | #if !defined(CONFIG_USER_ONLY) | |
97 | ||
b345b480 AF |
98 | /* Return true is floating point support is currently enabled */ |
99 | bool riscv_cpu_fp_enabled(CPURISCVState *env) | |
100 | { | |
101 | if (env->mstatus & MSTATUS_FS) { | |
29409c1d AF |
102 | if (riscv_cpu_virt_enabled(env) && !(env->mstatus_hs & MSTATUS_FS)) { |
103 | return false; | |
104 | } | |
b345b480 AF |
105 | return true; |
106 | } | |
107 | ||
108 | return false; | |
109 | } | |
110 | ||
66e594f2 AF |
111 | void riscv_cpu_swap_hypervisor_regs(CPURISCVState *env) |
112 | { | |
113 | target_ulong mstatus_mask = MSTATUS_MXR | MSTATUS_SUM | MSTATUS_FS | | |
114 | MSTATUS_SPP | MSTATUS_SPIE | MSTATUS_SIE; | |
115 | bool current_virt = riscv_cpu_virt_enabled(env); | |
116 | ||
117 | g_assert(riscv_has_ext(env, RVH)); | |
118 | ||
119 | #if defined(TARGET_RISCV64) | |
120 | mstatus_mask |= MSTATUS64_UXL; | |
121 | #endif | |
122 | ||
123 | if (current_virt) { | |
124 | /* Current V=1 and we are about to change to V=0 */ | |
125 | env->vsstatus = env->mstatus & mstatus_mask; | |
126 | env->mstatus &= ~mstatus_mask; | |
127 | env->mstatus |= env->mstatus_hs; | |
128 | ||
551fa7e8 AF |
129 | #if defined(TARGET_RISCV32) |
130 | env->vsstatush = env->mstatush; | |
131 | env->mstatush |= env->mstatush_hs; | |
132 | #endif | |
133 | ||
66e594f2 AF |
134 | env->vstvec = env->stvec; |
135 | env->stvec = env->stvec_hs; | |
136 | ||
137 | env->vsscratch = env->sscratch; | |
138 | env->sscratch = env->sscratch_hs; | |
139 | ||
140 | env->vsepc = env->sepc; | |
141 | env->sepc = env->sepc_hs; | |
142 | ||
143 | env->vscause = env->scause; | |
144 | env->scause = env->scause_hs; | |
145 | ||
146 | env->vstval = env->sbadaddr; | |
147 | env->sbadaddr = env->stval_hs; | |
148 | ||
149 | env->vsatp = env->satp; | |
150 | env->satp = env->satp_hs; | |
151 | } else { | |
152 | /* Current V=0 and we are about to change to V=1 */ | |
153 | env->mstatus_hs = env->mstatus & mstatus_mask; | |
154 | env->mstatus &= ~mstatus_mask; | |
155 | env->mstatus |= env->vsstatus; | |
156 | ||
551fa7e8 AF |
157 | #if defined(TARGET_RISCV32) |
158 | env->mstatush_hs = env->mstatush; | |
159 | env->mstatush |= env->vsstatush; | |
160 | #endif | |
161 | ||
66e594f2 AF |
162 | env->stvec_hs = env->stvec; |
163 | env->stvec = env->vstvec; | |
164 | ||
165 | env->sscratch_hs = env->sscratch; | |
166 | env->sscratch = env->vsscratch; | |
167 | ||
168 | env->sepc_hs = env->sepc; | |
169 | env->sepc = env->vsepc; | |
170 | ||
171 | env->scause_hs = env->scause; | |
172 | env->scause = env->vscause; | |
173 | ||
174 | env->stval_hs = env->sbadaddr; | |
175 | env->sbadaddr = env->vstval; | |
176 | ||
177 | env->satp_hs = env->satp; | |
178 | env->satp = env->vsatp; | |
179 | } | |
180 | } | |
181 | ||
ef6bb7b6 AF |
182 | bool riscv_cpu_virt_enabled(CPURISCVState *env) |
183 | { | |
184 | if (!riscv_has_ext(env, RVH)) { | |
185 | return false; | |
186 | } | |
187 | ||
188 | return get_field(env->virt, VIRT_ONOFF); | |
189 | } | |
190 | ||
191 | void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable) | |
192 | { | |
193 | if (!riscv_has_ext(env, RVH)) { | |
194 | return; | |
195 | } | |
196 | ||
eccc5a12 AF |
197 | /* Flush the TLB on all virt mode changes. */ |
198 | if (get_field(env->virt, VIRT_ONOFF) != enable) { | |
199 | tlb_flush(env_cpu(env)); | |
200 | } | |
201 | ||
ef6bb7b6 AF |
202 | env->virt = set_field(env->virt, VIRT_ONOFF, enable); |
203 | } | |
204 | ||
c7b1bbc8 AF |
205 | bool riscv_cpu_force_hs_excep_enabled(CPURISCVState *env) |
206 | { | |
207 | if (!riscv_has_ext(env, RVH)) { | |
208 | return false; | |
209 | } | |
210 | ||
211 | return get_field(env->virt, FORCE_HS_EXCEP); | |
212 | } | |
213 | ||
214 | void riscv_cpu_set_force_hs_excep(CPURISCVState *env, bool enable) | |
215 | { | |
216 | if (!riscv_has_ext(env, RVH)) { | |
217 | return; | |
218 | } | |
219 | ||
220 | env->virt = set_field(env->virt, FORCE_HS_EXCEP, enable); | |
221 | } | |
222 | ||
5a894dd7 AF |
223 | bool riscv_cpu_two_stage_lookup(CPURISCVState *env) |
224 | { | |
225 | if (!riscv_has_ext(env, RVH)) { | |
226 | return false; | |
227 | } | |
228 | ||
229 | return get_field(env->virt, HS_TWO_STAGE); | |
230 | } | |
231 | ||
232 | void riscv_cpu_set_two_stage_lookup(CPURISCVState *env, bool enable) | |
233 | { | |
234 | if (!riscv_has_ext(env, RVH)) { | |
235 | return; | |
236 | } | |
237 | ||
238 | env->virt = set_field(env->virt, HS_TWO_STAGE, enable); | |
239 | } | |
240 | ||
e3e7039c MC |
241 | int riscv_cpu_claim_interrupts(RISCVCPU *cpu, uint32_t interrupts) |
242 | { | |
243 | CPURISCVState *env = &cpu->env; | |
244 | if (env->miclaim & interrupts) { | |
245 | return -1; | |
246 | } else { | |
247 | env->miclaim |= interrupts; | |
248 | return 0; | |
249 | } | |
250 | } | |
251 | ||
df354dd4 MC |
252 | uint32_t riscv_cpu_update_mip(RISCVCPU *cpu, uint32_t mask, uint32_t value) |
253 | { | |
254 | CPURISCVState *env = &cpu->env; | |
0a01f2ee | 255 | CPUState *cs = CPU(cpu); |
7ec5d303 AF |
256 | uint32_t old = env->mip; |
257 | bool locked = false; | |
258 | ||
259 | if (!qemu_mutex_iothread_locked()) { | |
260 | locked = true; | |
261 | qemu_mutex_lock_iothread(); | |
262 | } | |
df354dd4 | 263 | |
7ec5d303 | 264 | env->mip = (env->mip & ~mask) | (value & mask); |
df354dd4 | 265 | |
7ec5d303 AF |
266 | if (env->mip) { |
267 | cpu_interrupt(cs, CPU_INTERRUPT_HARD); | |
268 | } else { | |
269 | cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD); | |
270 | } | |
0a01f2ee | 271 | |
7ec5d303 AF |
272 | if (locked) { |
273 | qemu_mutex_unlock_iothread(); | |
274 | } | |
df354dd4 MC |
275 | |
276 | return old; | |
277 | } | |
278 | ||
a47ef6e9 BM |
279 | void riscv_cpu_set_rdtime_fn(CPURISCVState *env, uint64_t (*fn)(uint32_t), |
280 | uint32_t arg) | |
c6957248 AP |
281 | { |
282 | env->rdtime_fn = fn; | |
a47ef6e9 | 283 | env->rdtime_fn_arg = arg; |
c6957248 AP |
284 | } |
285 | ||
fb738839 | 286 | void riscv_cpu_set_mode(CPURISCVState *env, target_ulong newpriv) |
df354dd4 MC |
287 | { |
288 | if (newpriv > PRV_M) { | |
289 | g_assert_not_reached(); | |
290 | } | |
291 | if (newpriv == PRV_H) { | |
292 | newpriv = PRV_U; | |
293 | } | |
294 | /* tlb_flush is unnecessary as mode is contained in mmu_idx */ | |
295 | env->priv = newpriv; | |
c13b169f JS |
296 | |
297 | /* | |
298 | * Clear the load reservation - otherwise a reservation placed in one | |
299 | * context/process can be used by another, resulting in an SC succeeding | |
300 | * incorrectly. Version 2.2 of the ISA specification explicitly requires | |
301 | * this behaviour, while later revisions say that the kernel "should" use | |
302 | * an SC instruction to force the yielding of a load reservation on a | |
303 | * preemptive context switch. As a result, do both. | |
304 | */ | |
305 | env->load_res = -1; | |
df354dd4 MC |
306 | } |
307 | ||
0c3e702a MC |
308 | /* get_physical_address - get the physical address for this virtual address |
309 | * | |
310 | * Do a page table walk to obtain the physical address corresponding to a | |
311 | * virtual address. Returns 0 if the translation was successful | |
312 | * | |
313 | * Adapted from Spike's mmu_t::translate and mmu_t::walk | |
314 | * | |
1448689c AF |
315 | * @env: CPURISCVState |
316 | * @physical: This will be set to the calculated physical address | |
317 | * @prot: The returned protection attributes | |
318 | * @addr: The virtual address to be translated | |
319 | * @access_type: The type of MMU access | |
320 | * @mmu_idx: Indicates current privilege level | |
321 | * @first_stage: Are we in first stage translation? | |
322 | * Second stage is used for hypervisor guest translation | |
36a18664 | 323 | * @two_stage: Are we going to perform two stage translation |
0c3e702a MC |
324 | */ |
325 | static int get_physical_address(CPURISCVState *env, hwaddr *physical, | |
326 | int *prot, target_ulong addr, | |
1448689c | 327 | int access_type, int mmu_idx, |
36a18664 | 328 | bool first_stage, bool two_stage) |
0c3e702a MC |
329 | { |
330 | /* NOTE: the env->pc value visible here will not be | |
331 | * correct, but the value visible to the exception handler | |
332 | * (riscv_cpu_do_interrupt) is correct */ | |
aacb578f PD |
333 | MemTxResult res; |
334 | MemTxAttrs attrs = MEMTXATTRS_UNSPECIFIED; | |
0c3e702a | 335 | int mode = mmu_idx; |
36a18664 | 336 | bool use_background = false; |
0c3e702a | 337 | |
36a18664 AF |
338 | /* |
339 | * Check if we should use the background registers for the two | |
340 | * stage translation. We don't need to check if we actually need | |
341 | * two stage translation as that happened before this function | |
342 | * was called. Background registers will be used if the guest has | |
343 | * forced a two stage translation to be on (in HS or M mode). | |
344 | */ | |
29b3361b AF |
345 | if (riscv_cpu_two_stage_lookup(env) && access_type != MMU_INST_FETCH) { |
346 | use_background = true; | |
347 | } | |
348 | ||
0c3e702a MC |
349 | if (mode == PRV_M && access_type != MMU_INST_FETCH) { |
350 | if (get_field(env->mstatus, MSTATUS_MPRV)) { | |
351 | mode = get_field(env->mstatus, MSTATUS_MPP); | |
352 | } | |
353 | } | |
354 | ||
36a18664 AF |
355 | if (first_stage == false) { |
356 | /* We are in stage 2 translation, this is similar to stage 1. */ | |
357 | /* Stage 2 is always taken as U-mode */ | |
358 | mode = PRV_U; | |
359 | } | |
360 | ||
0c3e702a MC |
361 | if (mode == PRV_M || !riscv_feature(env, RISCV_FEATURE_MMU)) { |
362 | *physical = addr; | |
363 | *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; | |
364 | return TRANSLATE_SUCCESS; | |
365 | } | |
366 | ||
367 | *prot = 0; | |
368 | ||
ddf78132 | 369 | hwaddr base; |
36a18664 AF |
370 | int levels, ptidxbits, ptesize, vm, sum, mxr, widened; |
371 | ||
372 | if (first_stage == true) { | |
373 | mxr = get_field(env->mstatus, MSTATUS_MXR); | |
374 | } else { | |
375 | mxr = get_field(env->vsstatus, MSTATUS_MXR); | |
376 | } | |
0c3e702a | 377 | |
1a9540d1 AF |
378 | if (first_stage == true) { |
379 | if (use_background) { | |
380 | base = (hwaddr)get_field(env->vsatp, SATP_PPN) << PGSHIFT; | |
381 | vm = get_field(env->vsatp, SATP_MODE); | |
36a18664 | 382 | } else { |
1a9540d1 AF |
383 | base = (hwaddr)get_field(env->satp, SATP_PPN) << PGSHIFT; |
384 | vm = get_field(env->satp, SATP_MODE); | |
0c3e702a | 385 | } |
36a18664 | 386 | widened = 0; |
1a9540d1 AF |
387 | } else { |
388 | base = (hwaddr)get_field(env->hgatp, HGATP_PPN) << PGSHIFT; | |
389 | vm = get_field(env->hgatp, HGATP_MODE); | |
390 | widened = 2; | |
391 | } | |
392 | sum = get_field(env->mstatus, MSTATUS_SUM); | |
393 | switch (vm) { | |
394 | case VM_1_10_SV32: | |
395 | levels = 2; ptidxbits = 10; ptesize = 4; break; | |
396 | case VM_1_10_SV39: | |
397 | levels = 3; ptidxbits = 9; ptesize = 8; break; | |
398 | case VM_1_10_SV48: | |
399 | levels = 4; ptidxbits = 9; ptesize = 8; break; | |
400 | case VM_1_10_SV57: | |
401 | levels = 5; ptidxbits = 9; ptesize = 8; break; | |
402 | case VM_1_10_MBARE: | |
403 | *physical = addr; | |
404 | *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; | |
405 | return TRANSLATE_SUCCESS; | |
406 | default: | |
407 | g_assert_not_reached(); | |
0c3e702a MC |
408 | } |
409 | ||
3109cd98 | 410 | CPUState *cs = env_cpu(env); |
36a18664 AF |
411 | int va_bits = PGSHIFT + levels * ptidxbits + widened; |
412 | target_ulong mask, masked_msbs; | |
413 | ||
414 | if (TARGET_LONG_BITS > (va_bits - 1)) { | |
415 | mask = (1L << (TARGET_LONG_BITS - (va_bits - 1))) - 1; | |
416 | } else { | |
417 | mask = 0; | |
418 | } | |
419 | masked_msbs = (addr >> (va_bits - 1)) & mask; | |
420 | ||
0c3e702a MC |
421 | if (masked_msbs != 0 && masked_msbs != mask) { |
422 | return TRANSLATE_FAIL; | |
423 | } | |
424 | ||
425 | int ptshift = (levels - 1) * ptidxbits; | |
426 | int i; | |
427 | ||
428 | #if !TCG_OVERSIZED_GUEST | |
429 | restart: | |
430 | #endif | |
431 | for (i = 0; i < levels; i++, ptshift -= ptidxbits) { | |
36a18664 AF |
432 | target_ulong idx; |
433 | if (i == 0) { | |
434 | idx = (addr >> (PGSHIFT + ptshift)) & | |
435 | ((1 << (ptidxbits + widened)) - 1); | |
436 | } else { | |
437 | idx = (addr >> (PGSHIFT + ptshift)) & | |
0c3e702a | 438 | ((1 << ptidxbits) - 1); |
36a18664 | 439 | } |
0c3e702a MC |
440 | |
441 | /* check that physical address of PTE is legal */ | |
36a18664 AF |
442 | hwaddr pte_addr; |
443 | ||
444 | if (two_stage && first_stage) { | |
38472890 | 445 | int vbase_prot; |
36a18664 AF |
446 | hwaddr vbase; |
447 | ||
448 | /* Do the second stage translation on the base PTE address. */ | |
88914473 AF |
449 | int vbase_ret = get_physical_address(env, &vbase, &vbase_prot, |
450 | base, MMU_DATA_LOAD, | |
451 | mmu_idx, false, true); | |
452 | ||
453 | if (vbase_ret != TRANSLATE_SUCCESS) { | |
454 | return vbase_ret; | |
455 | } | |
36a18664 AF |
456 | |
457 | pte_addr = vbase + idx * ptesize; | |
458 | } else { | |
459 | pte_addr = base + idx * ptesize; | |
460 | } | |
1f447aec HA |
461 | |
462 | if (riscv_feature(env, RISCV_FEATURE_PMP) && | |
463 | !pmp_hart_has_privs(env, pte_addr, sizeof(target_ulong), | |
464 | 1 << MMU_DATA_LOAD, PRV_S)) { | |
465 | return TRANSLATE_PMP_FAIL; | |
466 | } | |
aacb578f | 467 | |
0c3e702a | 468 | #if defined(TARGET_RISCV32) |
aacb578f | 469 | target_ulong pte = address_space_ldl(cs->as, pte_addr, attrs, &res); |
0c3e702a | 470 | #elif defined(TARGET_RISCV64) |
aacb578f | 471 | target_ulong pte = address_space_ldq(cs->as, pte_addr, attrs, &res); |
0c3e702a | 472 | #endif |
aacb578f PD |
473 | if (res != MEMTX_OK) { |
474 | return TRANSLATE_FAIL; | |
475 | } | |
476 | ||
ddf78132 | 477 | hwaddr ppn = pte >> PTE_PPN_SHIFT; |
0c3e702a | 478 | |
c3b03e58 MC |
479 | if (!(pte & PTE_V)) { |
480 | /* Invalid PTE */ | |
481 | return TRANSLATE_FAIL; | |
482 | } else if (!(pte & (PTE_R | PTE_W | PTE_X))) { | |
483 | /* Inner PTE, continue walking */ | |
0c3e702a | 484 | base = ppn << PGSHIFT; |
c3b03e58 MC |
485 | } else if ((pte & (PTE_R | PTE_W | PTE_X)) == PTE_W) { |
486 | /* Reserved leaf PTE flags: PTE_W */ | |
487 | return TRANSLATE_FAIL; | |
488 | } else if ((pte & (PTE_R | PTE_W | PTE_X)) == (PTE_W | PTE_X)) { | |
489 | /* Reserved leaf PTE flags: PTE_W + PTE_X */ | |
490 | return TRANSLATE_FAIL; | |
491 | } else if ((pte & PTE_U) && ((mode != PRV_U) && | |
492 | (!sum || access_type == MMU_INST_FETCH))) { | |
493 | /* User PTE flags when not U mode and mstatus.SUM is not set, | |
494 | or the access type is an instruction fetch */ | |
495 | return TRANSLATE_FAIL; | |
496 | } else if (!(pte & PTE_U) && (mode != PRV_S)) { | |
497 | /* Supervisor PTE flags when not S mode */ | |
498 | return TRANSLATE_FAIL; | |
499 | } else if (ppn & ((1ULL << ptshift) - 1)) { | |
500 | /* Misaligned PPN */ | |
501 | return TRANSLATE_FAIL; | |
502 | } else if (access_type == MMU_DATA_LOAD && !((pte & PTE_R) || | |
503 | ((pte & PTE_X) && mxr))) { | |
504 | /* Read access check failed */ | |
505 | return TRANSLATE_FAIL; | |
506 | } else if (access_type == MMU_DATA_STORE && !(pte & PTE_W)) { | |
507 | /* Write access check failed */ | |
508 | return TRANSLATE_FAIL; | |
509 | } else if (access_type == MMU_INST_FETCH && !(pte & PTE_X)) { | |
510 | /* Fetch access check failed */ | |
511 | return TRANSLATE_FAIL; | |
0c3e702a MC |
512 | } else { |
513 | /* if necessary, set accessed and dirty bits. */ | |
514 | target_ulong updated_pte = pte | PTE_A | | |
515 | (access_type == MMU_DATA_STORE ? PTE_D : 0); | |
516 | ||
517 | /* Page table updates need to be atomic with MTTCG enabled */ | |
518 | if (updated_pte != pte) { | |
c3b03e58 MC |
519 | /* |
520 | * - if accessed or dirty bits need updating, and the PTE is | |
521 | * in RAM, then we do so atomically with a compare and swap. | |
522 | * - if the PTE is in IO space or ROM, then it can't be updated | |
523 | * and we return TRANSLATE_FAIL. | |
524 | * - if the PTE changed by the time we went to update it, then | |
525 | * it is no longer valid and we must re-walk the page table. | |
526 | */ | |
0c3e702a MC |
527 | MemoryRegion *mr; |
528 | hwaddr l = sizeof(target_ulong), addr1; | |
529 | mr = address_space_translate(cs->as, pte_addr, | |
bc6b1cec | 530 | &addr1, &l, false, MEMTXATTRS_UNSPECIFIED); |
c3b03e58 | 531 | if (memory_region_is_ram(mr)) { |
0c3e702a MC |
532 | target_ulong *pte_pa = |
533 | qemu_map_ram_ptr(mr->ram_block, addr1); | |
534 | #if TCG_OVERSIZED_GUEST | |
535 | /* MTTCG is not enabled on oversized TCG guests so | |
536 | * page table updates do not need to be atomic */ | |
537 | *pte_pa = pte = updated_pte; | |
538 | #else | |
539 | target_ulong old_pte = | |
540 | atomic_cmpxchg(pte_pa, pte, updated_pte); | |
541 | if (old_pte != pte) { | |
542 | goto restart; | |
543 | } else { | |
544 | pte = updated_pte; | |
545 | } | |
546 | #endif | |
547 | } else { | |
548 | /* misconfigured PTE in ROM (AD bits are not preset) or | |
549 | * PTE is in IO space and can't be updated atomically */ | |
550 | return TRANSLATE_FAIL; | |
551 | } | |
552 | } | |
553 | ||
554 | /* for superpage mappings, make a fake leaf PTE for the TLB's | |
555 | benefit. */ | |
556 | target_ulong vpn = addr >> PGSHIFT; | |
9ef82119 ZL |
557 | *physical = ((ppn | (vpn & ((1L << ptshift) - 1))) << PGSHIFT) | |
558 | (addr & ~TARGET_PAGE_MASK); | |
0c3e702a | 559 | |
c3b03e58 MC |
560 | /* set permissions on the TLB entry */ |
561 | if ((pte & PTE_R) || ((pte & PTE_X) && mxr)) { | |
0c3e702a MC |
562 | *prot |= PAGE_READ; |
563 | } | |
564 | if ((pte & PTE_X)) { | |
565 | *prot |= PAGE_EXEC; | |
566 | } | |
c3b03e58 MC |
567 | /* add write permission on stores or if the page is already dirty, |
568 | so that we TLB miss on later writes to update the dirty bit */ | |
0c3e702a MC |
569 | if ((pte & PTE_W) && |
570 | (access_type == MMU_DATA_STORE || (pte & PTE_D))) { | |
571 | *prot |= PAGE_WRITE; | |
572 | } | |
573 | return TRANSLATE_SUCCESS; | |
574 | } | |
575 | } | |
576 | return TRANSLATE_FAIL; | |
577 | } | |
578 | ||
579 | static void raise_mmu_exception(CPURISCVState *env, target_ulong address, | |
1448689c AF |
580 | MMUAccessType access_type, bool pmp_violation, |
581 | bool first_stage) | |
0c3e702a | 582 | { |
3109cd98 | 583 | CPUState *cs = env_cpu(env); |
1448689c AF |
584 | int page_fault_exceptions; |
585 | if (first_stage) { | |
586 | page_fault_exceptions = | |
1448689c AF |
587 | get_field(env->satp, SATP_MODE) != VM_1_10_MBARE && |
588 | !pmp_violation; | |
589 | } else { | |
590 | page_fault_exceptions = | |
591 | get_field(env->hgatp, HGATP_MODE) != VM_1_10_MBARE && | |
592 | !pmp_violation; | |
593 | } | |
0c3e702a MC |
594 | switch (access_type) { |
595 | case MMU_INST_FETCH: | |
b2ef6ab9 AF |
596 | if (riscv_cpu_virt_enabled(env) && !first_stage) { |
597 | cs->exception_index = RISCV_EXCP_INST_GUEST_PAGE_FAULT; | |
598 | } else { | |
599 | cs->exception_index = page_fault_exceptions ? | |
600 | RISCV_EXCP_INST_PAGE_FAULT : RISCV_EXCP_INST_ACCESS_FAULT; | |
601 | } | |
0c3e702a MC |
602 | break; |
603 | case MMU_DATA_LOAD: | |
29b3361b AF |
604 | if ((riscv_cpu_virt_enabled(env) || riscv_cpu_two_stage_lookup(env)) && |
605 | !first_stage) { | |
b2ef6ab9 AF |
606 | cs->exception_index = RISCV_EXCP_LOAD_GUEST_ACCESS_FAULT; |
607 | } else { | |
608 | cs->exception_index = page_fault_exceptions ? | |
609 | RISCV_EXCP_LOAD_PAGE_FAULT : RISCV_EXCP_LOAD_ACCESS_FAULT; | |
610 | } | |
0c3e702a MC |
611 | break; |
612 | case MMU_DATA_STORE: | |
29b3361b AF |
613 | if ((riscv_cpu_virt_enabled(env) || riscv_cpu_two_stage_lookup(env)) && |
614 | !first_stage) { | |
b2ef6ab9 AF |
615 | cs->exception_index = RISCV_EXCP_STORE_GUEST_AMO_ACCESS_FAULT; |
616 | } else { | |
617 | cs->exception_index = page_fault_exceptions ? | |
618 | RISCV_EXCP_STORE_PAGE_FAULT : RISCV_EXCP_STORE_AMO_ACCESS_FAULT; | |
619 | } | |
0c3e702a MC |
620 | break; |
621 | default: | |
622 | g_assert_not_reached(); | |
623 | } | |
624 | env->badaddr = address; | |
625 | } | |
626 | ||
627 | hwaddr riscv_cpu_get_phys_page_debug(CPUState *cs, vaddr addr) | |
628 | { | |
629 | RISCVCPU *cpu = RISCV_CPU(cs); | |
36a18664 | 630 | CPURISCVState *env = &cpu->env; |
0c3e702a MC |
631 | hwaddr phys_addr; |
632 | int prot; | |
633 | int mmu_idx = cpu_mmu_index(&cpu->env, false); | |
634 | ||
36a18664 AF |
635 | if (get_physical_address(env, &phys_addr, &prot, addr, 0, mmu_idx, |
636 | true, riscv_cpu_virt_enabled(env))) { | |
0c3e702a MC |
637 | return -1; |
638 | } | |
36a18664 AF |
639 | |
640 | if (riscv_cpu_virt_enabled(env)) { | |
641 | if (get_physical_address(env, &phys_addr, &prot, phys_addr, | |
642 | 0, mmu_idx, false, true)) { | |
643 | return -1; | |
644 | } | |
645 | } | |
646 | ||
9ef82119 | 647 | return phys_addr & TARGET_PAGE_MASK; |
0c3e702a MC |
648 | } |
649 | ||
37207e12 PD |
650 | void riscv_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr, |
651 | vaddr addr, unsigned size, | |
652 | MMUAccessType access_type, | |
653 | int mmu_idx, MemTxAttrs attrs, | |
654 | MemTxResult response, uintptr_t retaddr) | |
cbf58276 MC |
655 | { |
656 | RISCVCPU *cpu = RISCV_CPU(cs); | |
657 | CPURISCVState *env = &cpu->env; | |
658 | ||
37207e12 | 659 | if (access_type == MMU_DATA_STORE) { |
cbf58276 MC |
660 | cs->exception_index = RISCV_EXCP_STORE_AMO_ACCESS_FAULT; |
661 | } else { | |
662 | cs->exception_index = RISCV_EXCP_LOAD_ACCESS_FAULT; | |
663 | } | |
664 | ||
665 | env->badaddr = addr; | |
37207e12 | 666 | riscv_raise_exception(&cpu->env, cs->exception_index, retaddr); |
cbf58276 MC |
667 | } |
668 | ||
0c3e702a MC |
669 | void riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr, |
670 | MMUAccessType access_type, int mmu_idx, | |
671 | uintptr_t retaddr) | |
672 | { | |
673 | RISCVCPU *cpu = RISCV_CPU(cs); | |
674 | CPURISCVState *env = &cpu->env; | |
675 | switch (access_type) { | |
676 | case MMU_INST_FETCH: | |
677 | cs->exception_index = RISCV_EXCP_INST_ADDR_MIS; | |
678 | break; | |
679 | case MMU_DATA_LOAD: | |
680 | cs->exception_index = RISCV_EXCP_LOAD_ADDR_MIS; | |
681 | break; | |
682 | case MMU_DATA_STORE: | |
683 | cs->exception_index = RISCV_EXCP_STORE_AMO_ADDR_MIS; | |
684 | break; | |
685 | default: | |
686 | g_assert_not_reached(); | |
687 | } | |
688 | env->badaddr = addr; | |
fb738839 | 689 | riscv_raise_exception(env, cs->exception_index, retaddr); |
0c3e702a | 690 | } |
0c3e702a MC |
691 | #endif |
692 | ||
8a4ca3c1 RH |
693 | bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size, |
694 | MMUAccessType access_type, int mmu_idx, | |
695 | bool probe, uintptr_t retaddr) | |
0c3e702a MC |
696 | { |
697 | RISCVCPU *cpu = RISCV_CPU(cs); | |
698 | CPURISCVState *env = &cpu->env; | |
2921343b | 699 | #ifndef CONFIG_USER_ONLY |
36a18664 | 700 | vaddr im_address; |
0c3e702a | 701 | hwaddr pa = 0; |
8f67cd6d | 702 | int prot, prot2; |
635b0b0e | 703 | bool pmp_violation = false; |
36a18664 | 704 | bool first_stage_error = true; |
0c3e702a | 705 | int ret = TRANSLATE_FAIL; |
cc0fdb29 | 706 | int mode = mmu_idx; |
af3fc195 | 707 | target_ulong tlb_size = 0; |
0c3e702a | 708 | |
36a18664 AF |
709 | env->guest_phys_fault_addr = 0; |
710 | ||
8a4ca3c1 RH |
711 | qemu_log_mask(CPU_LOG_MMU, "%s ad %" VADDR_PRIx " rw %d mmu_idx %d\n", |
712 | __func__, address, access_type, mmu_idx); | |
713 | ||
cc0fdb29 HA |
714 | if (mode == PRV_M && access_type != MMU_INST_FETCH) { |
715 | if (get_field(env->mstatus, MSTATUS_MPRV)) { | |
716 | mode = get_field(env->mstatus, MSTATUS_MPP); | |
717 | } | |
718 | } | |
719 | ||
29b3361b AF |
720 | if (riscv_has_ext(env, RVH) && env->priv == PRV_M && |
721 | access_type != MMU_INST_FETCH && | |
722 | get_field(env->mstatus, MSTATUS_MPRV) && | |
723 | MSTATUS_MPV_ISSET(env)) { | |
724 | riscv_cpu_set_two_stage_lookup(env, true); | |
725 | } | |
726 | ||
727 | if (riscv_cpu_virt_enabled(env) || | |
728 | (riscv_cpu_two_stage_lookup(env) && access_type != MMU_INST_FETCH)) { | |
36a18664 AF |
729 | /* Two stage lookup */ |
730 | ret = get_physical_address(env, &pa, &prot, address, access_type, | |
731 | mmu_idx, true, true); | |
732 | ||
733 | qemu_log_mask(CPU_LOG_MMU, | |
734 | "%s 1st-stage address=%" VADDR_PRIx " ret %d physical " | |
735 | TARGET_FMT_plx " prot %d\n", | |
736 | __func__, address, ret, pa, prot); | |
737 | ||
738 | if (ret != TRANSLATE_FAIL) { | |
739 | /* Second stage lookup */ | |
740 | im_address = pa; | |
741 | ||
8f67cd6d | 742 | ret = get_physical_address(env, &pa, &prot2, im_address, |
36a18664 AF |
743 | access_type, mmu_idx, false, true); |
744 | ||
745 | qemu_log_mask(CPU_LOG_MMU, | |
746 | "%s 2nd-stage address=%" VADDR_PRIx " ret %d physical " | |
747 | TARGET_FMT_plx " prot %d\n", | |
8f67cd6d AF |
748 | __func__, im_address, ret, pa, prot2); |
749 | ||
750 | prot &= prot2; | |
36a18664 AF |
751 | |
752 | if (riscv_feature(env, RISCV_FEATURE_PMP) && | |
753 | (ret == TRANSLATE_SUCCESS) && | |
754 | !pmp_hart_has_privs(env, pa, size, 1 << access_type, mode)) { | |
755 | ret = TRANSLATE_PMP_FAIL; | |
756 | } | |
757 | ||
758 | if (ret != TRANSLATE_SUCCESS) { | |
759 | /* | |
760 | * Guest physical address translation failed, this is a HS | |
761 | * level exception | |
762 | */ | |
763 | first_stage_error = false; | |
764 | env->guest_phys_fault_addr = (im_address | | |
765 | (address & | |
766 | (TARGET_PAGE_SIZE - 1))) >> 2; | |
767 | } | |
768 | } | |
769 | } else { | |
770 | /* Single stage lookup */ | |
771 | ret = get_physical_address(env, &pa, &prot, address, access_type, | |
772 | mmu_idx, true, false); | |
773 | ||
774 | qemu_log_mask(CPU_LOG_MMU, | |
775 | "%s address=%" VADDR_PRIx " ret %d physical " | |
776 | TARGET_FMT_plx " prot %d\n", | |
777 | __func__, address, ret, pa, prot); | |
778 | } | |
8a4ca3c1 | 779 | |
29b3361b AF |
780 | /* We did the two stage lookup based on MPRV, unset the lookup */ |
781 | if (riscv_has_ext(env, RVH) && env->priv == PRV_M && | |
782 | access_type != MMU_INST_FETCH && | |
783 | get_field(env->mstatus, MSTATUS_MPRV) && | |
784 | MSTATUS_MPV_ISSET(env)) { | |
785 | riscv_cpu_set_two_stage_lookup(env, false); | |
786 | } | |
787 | ||
a88365c1 | 788 | if (riscv_feature(env, RISCV_FEATURE_PMP) && |
e0f8fa72 | 789 | (ret == TRANSLATE_SUCCESS) && |
db21e6f7 | 790 | !pmp_hart_has_privs(env, pa, size, 1 << access_type, mode)) { |
1f447aec HA |
791 | ret = TRANSLATE_PMP_FAIL; |
792 | } | |
793 | if (ret == TRANSLATE_PMP_FAIL) { | |
635b0b0e | 794 | pmp_violation = true; |
0c3e702a | 795 | } |
36a18664 | 796 | |
0c3e702a | 797 | if (ret == TRANSLATE_SUCCESS) { |
af3fc195 ZL |
798 | if (pmp_is_range_in_tlb(env, pa & TARGET_PAGE_MASK, &tlb_size)) { |
799 | tlb_set_page(cs, address & ~(tlb_size - 1), pa & ~(tlb_size - 1), | |
800 | prot, mmu_idx, tlb_size); | |
801 | } else { | |
802 | tlb_set_page(cs, address & TARGET_PAGE_MASK, pa & TARGET_PAGE_MASK, | |
803 | prot, mmu_idx, TARGET_PAGE_SIZE); | |
804 | } | |
8a4ca3c1 RH |
805 | return true; |
806 | } else if (probe) { | |
807 | return false; | |
808 | } else { | |
36a18664 | 809 | raise_mmu_exception(env, address, access_type, pmp_violation, first_stage_error); |
8a4ca3c1 | 810 | riscv_raise_exception(env, cs->exception_index, retaddr); |
0c3e702a | 811 | } |
36a18664 AF |
812 | |
813 | return true; | |
814 | ||
0c3e702a | 815 | #else |
8a4ca3c1 | 816 | switch (access_type) { |
0c3e702a MC |
817 | case MMU_INST_FETCH: |
818 | cs->exception_index = RISCV_EXCP_INST_PAGE_FAULT; | |
819 | break; | |
820 | case MMU_DATA_LOAD: | |
821 | cs->exception_index = RISCV_EXCP_LOAD_PAGE_FAULT; | |
822 | break; | |
823 | case MMU_DATA_STORE: | |
824 | cs->exception_index = RISCV_EXCP_STORE_PAGE_FAULT; | |
825 | break; | |
2921343b GM |
826 | default: |
827 | g_assert_not_reached(); | |
0c3e702a | 828 | } |
2921343b | 829 | env->badaddr = address; |
8a4ca3c1 | 830 | cpu_loop_exit_restore(cs, retaddr); |
0c3e702a | 831 | #endif |
0c3e702a MC |
832 | } |
833 | ||
834 | /* | |
835 | * Handle Traps | |
836 | * | |
837 | * Adapted from Spike's processor_t::take_trap. | |
838 | * | |
839 | */ | |
840 | void riscv_cpu_do_interrupt(CPUState *cs) | |
841 | { | |
842 | #if !defined(CONFIG_USER_ONLY) | |
843 | ||
844 | RISCVCPU *cpu = RISCV_CPU(cs); | |
845 | CPURISCVState *env = &cpu->env; | |
5eb9e782 AF |
846 | bool force_hs_execp = riscv_cpu_force_hs_excep_enabled(env); |
847 | target_ulong s; | |
0c3e702a | 848 | |
acbbb94e MC |
849 | /* cs->exception is 32-bits wide unlike mcause which is XLEN-bits wide |
850 | * so we mask off the MSB and separate into trap type and cause. | |
851 | */ | |
852 | bool async = !!(cs->exception_index & RISCV_EXCP_INT_FLAG); | |
853 | target_ulong cause = cs->exception_index & RISCV_EXCP_INT_MASK; | |
854 | target_ulong deleg = async ? env->mideleg : env->medeleg; | |
855 | target_ulong tval = 0; | |
30675539 AF |
856 | target_ulong htval = 0; |
857 | target_ulong mtval2 = 0; | |
acbbb94e | 858 | |
acbbb94e MC |
859 | if (!async) { |
860 | /* set tval to badaddr for traps with address information */ | |
861 | switch (cause) { | |
ab67a1d0 AF |
862 | case RISCV_EXCP_INST_GUEST_PAGE_FAULT: |
863 | case RISCV_EXCP_LOAD_GUEST_ACCESS_FAULT: | |
864 | case RISCV_EXCP_STORE_GUEST_AMO_ACCESS_FAULT: | |
5eb9e782 AF |
865 | force_hs_execp = true; |
866 | /* fallthrough */ | |
acbbb94e MC |
867 | case RISCV_EXCP_INST_ADDR_MIS: |
868 | case RISCV_EXCP_INST_ACCESS_FAULT: | |
869 | case RISCV_EXCP_LOAD_ADDR_MIS: | |
870 | case RISCV_EXCP_STORE_AMO_ADDR_MIS: | |
871 | case RISCV_EXCP_LOAD_ACCESS_FAULT: | |
872 | case RISCV_EXCP_STORE_AMO_ACCESS_FAULT: | |
873 | case RISCV_EXCP_INST_PAGE_FAULT: | |
874 | case RISCV_EXCP_LOAD_PAGE_FAULT: | |
875 | case RISCV_EXCP_STORE_PAGE_FAULT: | |
876 | tval = env->badaddr; | |
877 | break; | |
878 | default: | |
879 | break; | |
0c3e702a | 880 | } |
acbbb94e MC |
881 | /* ecall is dispatched as one cause so translate based on mode */ |
882 | if (cause == RISCV_EXCP_U_ECALL) { | |
883 | assert(env->priv <= 3); | |
5eb9e782 AF |
884 | |
885 | if (env->priv == PRV_M) { | |
886 | cause = RISCV_EXCP_M_ECALL; | |
887 | } else if (env->priv == PRV_S && riscv_cpu_virt_enabled(env)) { | |
888 | cause = RISCV_EXCP_VS_ECALL; | |
889 | } else if (env->priv == PRV_S && !riscv_cpu_virt_enabled(env)) { | |
890 | cause = RISCV_EXCP_S_ECALL; | |
891 | } else if (env->priv == PRV_U) { | |
892 | cause = RISCV_EXCP_U_ECALL; | |
893 | } | |
0c3e702a MC |
894 | } |
895 | } | |
896 | ||
c51a3f5d YJ |
897 | trace_riscv_trap(env->mhartid, async, cause, env->pc, tval, |
898 | riscv_cpu_get_trap_name(cause, async)); | |
0c3e702a | 899 | |
acbbb94e MC |
900 | if (env->priv <= PRV_S && |
901 | cause < TARGET_LONG_BITS && ((deleg >> cause) & 1)) { | |
0c3e702a | 902 | /* handle the trap in S-mode */ |
5eb9e782 AF |
903 | if (riscv_has_ext(env, RVH)) { |
904 | target_ulong hdeleg = async ? env->hideleg : env->hedeleg; | |
905 | ||
9034e90a AF |
906 | if ((riscv_cpu_virt_enabled(env) || |
907 | riscv_cpu_two_stage_lookup(env)) && tval) { | |
908 | /* | |
909 | * If we are writing a guest virtual address to stval, set | |
910 | * this to 1. If we are trapping to VS we will set this to 0 | |
911 | * later. | |
912 | */ | |
913 | env->hstatus = set_field(env->hstatus, HSTATUS_GVA, 1); | |
914 | } else { | |
915 | /* For other HS-mode traps, we set this to 0. */ | |
916 | env->hstatus = set_field(env->hstatus, HSTATUS_GVA, 0); | |
917 | } | |
918 | ||
5eb9e782 AF |
919 | if (riscv_cpu_virt_enabled(env) && ((hdeleg >> cause) & 1) && |
920 | !force_hs_execp) { | |
84b1c04b | 921 | /* Trap to VS mode */ |
c5969a3a RK |
922 | /* |
923 | * See if we need to adjust cause. Yes if its VS mode interrupt | |
924 | * no if hypervisor has delegated one of hs mode's interrupt | |
925 | */ | |
926 | if (cause == IRQ_VS_TIMER || cause == IRQ_VS_SOFT || | |
84b1c04b | 927 | cause == IRQ_VS_EXT) { |
c5969a3a | 928 | cause = cause - 1; |
84b1c04b | 929 | } |
9034e90a | 930 | env->hstatus = set_field(env->hstatus, HSTATUS_GVA, 0); |
5eb9e782 AF |
931 | } else if (riscv_cpu_virt_enabled(env)) { |
932 | /* Trap into HS mode, from virt */ | |
933 | riscv_cpu_swap_hypervisor_regs(env); | |
f2d5850f | 934 | env->hstatus = set_field(env->hstatus, HSTATUS_SPVP, |
5eb9e782 AF |
935 | get_field(env->mstatus, SSTATUS_SPP)); |
936 | env->hstatus = set_field(env->hstatus, HSTATUS_SPV, | |
937 | riscv_cpu_virt_enabled(env)); | |
938 | ||
30675539 AF |
939 | htval = env->guest_phys_fault_addr; |
940 | ||
5eb9e782 AF |
941 | riscv_cpu_set_virt_enabled(env, 0); |
942 | riscv_cpu_set_force_hs_excep(env, 0); | |
943 | } else { | |
944 | /* Trap into HS mode */ | |
f2d5850f AF |
945 | if (!riscv_cpu_two_stage_lookup(env)) { |
946 | env->hstatus = set_field(env->hstatus, HSTATUS_SPV, | |
947 | riscv_cpu_virt_enabled(env)); | |
948 | } | |
949 | riscv_cpu_set_two_stage_lookup(env, false); | |
30675539 | 950 | htval = env->guest_phys_fault_addr; |
5eb9e782 AF |
951 | } |
952 | } | |
953 | ||
954 | s = env->mstatus; | |
1a9540d1 | 955 | s = set_field(s, MSTATUS_SPIE, get_field(s, MSTATUS_SIE)); |
0c3e702a MC |
956 | s = set_field(s, MSTATUS_SPP, env->priv); |
957 | s = set_field(s, MSTATUS_SIE, 0); | |
c7b95171 | 958 | env->mstatus = s; |
16fdb8ff | 959 | env->scause = cause | ((target_ulong)async << (TARGET_LONG_BITS - 1)); |
acbbb94e MC |
960 | env->sepc = env->pc; |
961 | env->sbadaddr = tval; | |
30675539 | 962 | env->htval = htval; |
acbbb94e MC |
963 | env->pc = (env->stvec >> 2 << 2) + |
964 | ((async && (env->stvec & 3) == 1) ? cause * 4 : 0); | |
fb738839 | 965 | riscv_cpu_set_mode(env, PRV_S); |
0c3e702a | 966 | } else { |
acbbb94e | 967 | /* handle the trap in M-mode */ |
5eb9e782 AF |
968 | if (riscv_has_ext(env, RVH)) { |
969 | if (riscv_cpu_virt_enabled(env)) { | |
970 | riscv_cpu_swap_hypervisor_regs(env); | |
971 | } | |
551fa7e8 AF |
972 | #ifdef TARGET_RISCV32 |
973 | env->mstatush = set_field(env->mstatush, MSTATUS_MPV, | |
974 | riscv_cpu_virt_enabled(env)); | |
9034e90a AF |
975 | if (riscv_cpu_virt_enabled(env) && tval) { |
976 | env->mstatush = set_field(env->mstatush, MSTATUS_GVA, 1); | |
977 | } | |
551fa7e8 | 978 | #else |
5eb9e782 AF |
979 | env->mstatus = set_field(env->mstatus, MSTATUS_MPV, |
980 | riscv_cpu_virt_enabled(env)); | |
9034e90a AF |
981 | if (riscv_cpu_virt_enabled(env) && tval) { |
982 | env->mstatus = set_field(env->mstatus, MSTATUS_GVA, 1); | |
983 | } | |
551fa7e8 | 984 | #endif |
5eb9e782 | 985 | |
30675539 AF |
986 | mtval2 = env->guest_phys_fault_addr; |
987 | ||
5eb9e782 AF |
988 | /* Trapping to M mode, virt is disabled */ |
989 | riscv_cpu_set_virt_enabled(env, 0); | |
990 | riscv_cpu_set_force_hs_excep(env, 0); | |
991 | } | |
992 | ||
993 | s = env->mstatus; | |
1a9540d1 | 994 | s = set_field(s, MSTATUS_MPIE, get_field(s, MSTATUS_MIE)); |
0c3e702a MC |
995 | s = set_field(s, MSTATUS_MPP, env->priv); |
996 | s = set_field(s, MSTATUS_MIE, 0); | |
c7b95171 | 997 | env->mstatus = s; |
acbbb94e MC |
998 | env->mcause = cause | ~(((target_ulong)-1) >> async); |
999 | env->mepc = env->pc; | |
1000 | env->mbadaddr = tval; | |
30675539 | 1001 | env->mtval2 = mtval2; |
acbbb94e MC |
1002 | env->pc = (env->mtvec >> 2 << 2) + |
1003 | ((async && (env->mtvec & 3) == 1) ? cause * 4 : 0); | |
fb738839 | 1004 | riscv_cpu_set_mode(env, PRV_M); |
0c3e702a | 1005 | } |
d9360e96 MC |
1006 | |
1007 | /* NOTE: it is not necessary to yield load reservations here. It is only | |
1008 | * necessary for an SC from "another hart" to cause a load reservation | |
1009 | * to be yielded. Refer to the memory consistency model section of the | |
1010 | * RISC-V ISA Specification. | |
1011 | */ | |
1012 | ||
0c3e702a MC |
1013 | #endif |
1014 | cs->exception_index = EXCP_NONE; /* mark handled to qemu */ | |
1015 | } |