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7c8c5e6a MZ |
1 | /* |
2 | * Copyright (C) 2012,2013 - ARM Ltd | |
3 | * Author: Marc Zyngier <marc.zyngier@arm.com> | |
4 | * | |
5 | * Derived from arch/arm/kvm/coproc.c: | |
6 | * Copyright (C) 2012 - Virtual Open Systems and Columbia University | |
7 | * Authors: Rusty Russell <rusty@rustcorp.com.au> | |
8 | * Christoffer Dall <c.dall@virtualopensystems.com> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License, version 2, as | |
12 | * published by the Free Software Foundation. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
21 | */ | |
22 | ||
623eefa8 | 23 | #include <linux/bsearch.h> |
7c8c5e6a | 24 | #include <linux/kvm_host.h> |
c6d01a94 | 25 | #include <linux/mm.h> |
7c8c5e6a | 26 | #include <linux/uaccess.h> |
c6d01a94 | 27 | |
7c8c5e6a MZ |
28 | #include <asm/cacheflush.h> |
29 | #include <asm/cputype.h> | |
0c557ed4 | 30 | #include <asm/debug-monitors.h> |
c6d01a94 MR |
31 | #include <asm/esr.h> |
32 | #include <asm/kvm_arm.h> | |
9d8415d6 | 33 | #include <asm/kvm_asm.h> |
c6d01a94 MR |
34 | #include <asm/kvm_coproc.h> |
35 | #include <asm/kvm_emulate.h> | |
36 | #include <asm/kvm_host.h> | |
37 | #include <asm/kvm_mmu.h> | |
ab946834 | 38 | #include <asm/perf_event.h> |
1f3d8699 | 39 | #include <asm/sysreg.h> |
c6d01a94 | 40 | |
7c8c5e6a MZ |
41 | #include <trace/events/kvm.h> |
42 | ||
43 | #include "sys_regs.h" | |
44 | ||
eef8c85a AB |
45 | #include "trace.h" |
46 | ||
7c8c5e6a MZ |
47 | /* |
48 | * All of this file is extremly similar to the ARM coproc.c, but the | |
49 | * types are different. My gut feeling is that it should be pretty | |
50 | * easy to merge, but that would be an ABI breakage -- again. VFP | |
51 | * would also need to be abstracted. | |
62a89c44 MZ |
52 | * |
53 | * For AArch32, we only take care of what is being trapped. Anything | |
54 | * that has to do with init and userspace access has to go via the | |
55 | * 64bit interface. | |
7c8c5e6a MZ |
56 | */ |
57 | ||
7b5b4df1 | 58 | static bool read_from_write_only(struct kvm_vcpu *vcpu, |
e7f1d1ee MZ |
59 | struct sys_reg_params *params, |
60 | const struct sys_reg_desc *r) | |
7b5b4df1 MZ |
61 | { |
62 | WARN_ONCE(1, "Unexpected sys_reg read to write-only register\n"); | |
63 | print_sys_reg_instr(params); | |
64 | kvm_inject_undefined(vcpu); | |
65 | return false; | |
66 | } | |
67 | ||
7b1dba1f MZ |
68 | static bool write_to_read_only(struct kvm_vcpu *vcpu, |
69 | struct sys_reg_params *params, | |
70 | const struct sys_reg_desc *r) | |
71 | { | |
72 | WARN_ONCE(1, "Unexpected sys_reg write to read-only register\n"); | |
73 | print_sys_reg_instr(params); | |
74 | kvm_inject_undefined(vcpu); | |
75 | return false; | |
76 | } | |
77 | ||
7c8c5e6a MZ |
78 | /* 3 bits per cache level, as per CLIDR, but non-existent caches always 0 */ |
79 | static u32 cache_levels; | |
80 | ||
81 | /* CSSELR values; used to index KVM_REG_ARM_DEMUX_ID_CCSIDR */ | |
82 | #define CSSELR_MAX 12 | |
83 | ||
84 | /* Which cache CCSIDR represents depends on CSSELR value. */ | |
85 | static u32 get_ccsidr(u32 csselr) | |
86 | { | |
87 | u32 ccsidr; | |
88 | ||
89 | /* Make sure noone else changes CSSELR during this! */ | |
90 | local_irq_disable(); | |
1f3d8699 | 91 | write_sysreg(csselr, csselr_el1); |
7c8c5e6a | 92 | isb(); |
1f3d8699 | 93 | ccsidr = read_sysreg(ccsidr_el1); |
7c8c5e6a MZ |
94 | local_irq_enable(); |
95 | ||
96 | return ccsidr; | |
97 | } | |
98 | ||
3c1e7165 MZ |
99 | /* |
100 | * See note at ARMv7 ARM B1.14.4 (TL;DR: S/W ops are not easily virtualized). | |
101 | */ | |
7c8c5e6a | 102 | static bool access_dcsw(struct kvm_vcpu *vcpu, |
3fec037d | 103 | struct sys_reg_params *p, |
7c8c5e6a MZ |
104 | const struct sys_reg_desc *r) |
105 | { | |
7c8c5e6a | 106 | if (!p->is_write) |
e7f1d1ee | 107 | return read_from_write_only(vcpu, p, r); |
7c8c5e6a | 108 | |
3c1e7165 | 109 | kvm_set_way_flush(vcpu); |
7c8c5e6a MZ |
110 | return true; |
111 | } | |
112 | ||
4d44923b MZ |
113 | /* |
114 | * Generic accessor for VM registers. Only called as long as HCR_TVM | |
3c1e7165 MZ |
115 | * is set. If the guest enables the MMU, we stop trapping the VM |
116 | * sys_regs and leave it in complete control of the caches. | |
4d44923b MZ |
117 | */ |
118 | static bool access_vm_reg(struct kvm_vcpu *vcpu, | |
3fec037d | 119 | struct sys_reg_params *p, |
4d44923b MZ |
120 | const struct sys_reg_desc *r) |
121 | { | |
3c1e7165 | 122 | bool was_enabled = vcpu_has_cache_enabled(vcpu); |
4d44923b MZ |
123 | |
124 | BUG_ON(!p->is_write); | |
125 | ||
dedf97e8 | 126 | if (!p->is_aarch32) { |
2ec5be3d | 127 | vcpu_sys_reg(vcpu, r->reg) = p->regval; |
dedf97e8 MZ |
128 | } else { |
129 | if (!p->is_32bit) | |
2ec5be3d PF |
130 | vcpu_cp15_64_high(vcpu, r->reg) = upper_32_bits(p->regval); |
131 | vcpu_cp15_64_low(vcpu, r->reg) = lower_32_bits(p->regval); | |
dedf97e8 | 132 | } |
f0a3eaff | 133 | |
3c1e7165 | 134 | kvm_toggle_cache(vcpu, was_enabled); |
4d44923b MZ |
135 | return true; |
136 | } | |
137 | ||
6d52f35a AP |
138 | /* |
139 | * Trap handler for the GICv3 SGI generation system register. | |
140 | * Forward the request to the VGIC emulation. | |
141 | * The cp15_64 code makes sure this automatically works | |
142 | * for both AArch64 and AArch32 accesses. | |
143 | */ | |
144 | static bool access_gic_sgi(struct kvm_vcpu *vcpu, | |
3fec037d | 145 | struct sys_reg_params *p, |
6d52f35a AP |
146 | const struct sys_reg_desc *r) |
147 | { | |
6d52f35a | 148 | if (!p->is_write) |
e7f1d1ee | 149 | return read_from_write_only(vcpu, p, r); |
6d52f35a | 150 | |
2ec5be3d | 151 | vgic_v3_dispatch_sgi(vcpu, p->regval); |
6d52f35a AP |
152 | |
153 | return true; | |
154 | } | |
155 | ||
b34f2bcb MZ |
156 | static bool access_gic_sre(struct kvm_vcpu *vcpu, |
157 | struct sys_reg_params *p, | |
158 | const struct sys_reg_desc *r) | |
159 | { | |
160 | if (p->is_write) | |
161 | return ignore_write(vcpu, p); | |
162 | ||
163 | p->regval = vcpu->arch.vgic_cpu.vgic_v3.vgic_sre; | |
164 | return true; | |
165 | } | |
166 | ||
7609c125 | 167 | static bool trap_raz_wi(struct kvm_vcpu *vcpu, |
3fec037d | 168 | struct sys_reg_params *p, |
7609c125 | 169 | const struct sys_reg_desc *r) |
7c8c5e6a MZ |
170 | { |
171 | if (p->is_write) | |
172 | return ignore_write(vcpu, p); | |
173 | else | |
174 | return read_zero(vcpu, p); | |
175 | } | |
176 | ||
0c557ed4 | 177 | static bool trap_oslsr_el1(struct kvm_vcpu *vcpu, |
3fec037d | 178 | struct sys_reg_params *p, |
0c557ed4 MZ |
179 | const struct sys_reg_desc *r) |
180 | { | |
181 | if (p->is_write) { | |
182 | return ignore_write(vcpu, p); | |
183 | } else { | |
2ec5be3d | 184 | p->regval = (1 << 3); |
0c557ed4 MZ |
185 | return true; |
186 | } | |
187 | } | |
188 | ||
189 | static bool trap_dbgauthstatus_el1(struct kvm_vcpu *vcpu, | |
3fec037d | 190 | struct sys_reg_params *p, |
0c557ed4 MZ |
191 | const struct sys_reg_desc *r) |
192 | { | |
193 | if (p->is_write) { | |
194 | return ignore_write(vcpu, p); | |
195 | } else { | |
1f3d8699 | 196 | p->regval = read_sysreg(dbgauthstatus_el1); |
0c557ed4 MZ |
197 | return true; |
198 | } | |
199 | } | |
200 | ||
201 | /* | |
202 | * We want to avoid world-switching all the DBG registers all the | |
203 | * time: | |
204 | * | |
205 | * - If we've touched any debug register, it is likely that we're | |
206 | * going to touch more of them. It then makes sense to disable the | |
207 | * traps and start doing the save/restore dance | |
208 | * - If debug is active (DBG_MDSCR_KDE or DBG_MDSCR_MDE set), it is | |
209 | * then mandatory to save/restore the registers, as the guest | |
210 | * depends on them. | |
211 | * | |
212 | * For this, we use a DIRTY bit, indicating the guest has modified the | |
213 | * debug registers, used as follow: | |
214 | * | |
215 | * On guest entry: | |
216 | * - If the dirty bit is set (because we're coming back from trapping), | |
217 | * disable the traps, save host registers, restore guest registers. | |
218 | * - If debug is actively in use (DBG_MDSCR_KDE or DBG_MDSCR_MDE set), | |
219 | * set the dirty bit, disable the traps, save host registers, | |
220 | * restore guest registers. | |
221 | * - Otherwise, enable the traps | |
222 | * | |
223 | * On guest exit: | |
224 | * - If the dirty bit is set, save guest registers, restore host | |
225 | * registers and clear the dirty bit. This ensure that the host can | |
226 | * now use the debug registers. | |
227 | */ | |
228 | static bool trap_debug_regs(struct kvm_vcpu *vcpu, | |
3fec037d | 229 | struct sys_reg_params *p, |
0c557ed4 MZ |
230 | const struct sys_reg_desc *r) |
231 | { | |
232 | if (p->is_write) { | |
2ec5be3d | 233 | vcpu_sys_reg(vcpu, r->reg) = p->regval; |
0c557ed4 MZ |
234 | vcpu->arch.debug_flags |= KVM_ARM64_DEBUG_DIRTY; |
235 | } else { | |
2ec5be3d | 236 | p->regval = vcpu_sys_reg(vcpu, r->reg); |
0c557ed4 MZ |
237 | } |
238 | ||
2ec5be3d | 239 | trace_trap_reg(__func__, r->reg, p->is_write, p->regval); |
eef8c85a | 240 | |
0c557ed4 MZ |
241 | return true; |
242 | } | |
243 | ||
84e690bf AB |
244 | /* |
245 | * reg_to_dbg/dbg_to_reg | |
246 | * | |
247 | * A 32 bit write to a debug register leave top bits alone | |
248 | * A 32 bit read from a debug register only returns the bottom bits | |
249 | * | |
250 | * All writes will set the KVM_ARM64_DEBUG_DIRTY flag to ensure the | |
251 | * hyp.S code switches between host and guest values in future. | |
252 | */ | |
281243cb MZ |
253 | static void reg_to_dbg(struct kvm_vcpu *vcpu, |
254 | struct sys_reg_params *p, | |
255 | u64 *dbg_reg) | |
84e690bf | 256 | { |
2ec5be3d | 257 | u64 val = p->regval; |
84e690bf AB |
258 | |
259 | if (p->is_32bit) { | |
260 | val &= 0xffffffffUL; | |
261 | val |= ((*dbg_reg >> 32) << 32); | |
262 | } | |
263 | ||
264 | *dbg_reg = val; | |
265 | vcpu->arch.debug_flags |= KVM_ARM64_DEBUG_DIRTY; | |
266 | } | |
267 | ||
281243cb MZ |
268 | static void dbg_to_reg(struct kvm_vcpu *vcpu, |
269 | struct sys_reg_params *p, | |
270 | u64 *dbg_reg) | |
84e690bf | 271 | { |
2ec5be3d | 272 | p->regval = *dbg_reg; |
84e690bf | 273 | if (p->is_32bit) |
2ec5be3d | 274 | p->regval &= 0xffffffffUL; |
84e690bf AB |
275 | } |
276 | ||
281243cb MZ |
277 | static bool trap_bvr(struct kvm_vcpu *vcpu, |
278 | struct sys_reg_params *p, | |
279 | const struct sys_reg_desc *rd) | |
84e690bf AB |
280 | { |
281 | u64 *dbg_reg = &vcpu->arch.vcpu_debug_state.dbg_bvr[rd->reg]; | |
282 | ||
283 | if (p->is_write) | |
284 | reg_to_dbg(vcpu, p, dbg_reg); | |
285 | else | |
286 | dbg_to_reg(vcpu, p, dbg_reg); | |
287 | ||
eef8c85a AB |
288 | trace_trap_reg(__func__, rd->reg, p->is_write, *dbg_reg); |
289 | ||
84e690bf AB |
290 | return true; |
291 | } | |
292 | ||
293 | static int set_bvr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, | |
294 | const struct kvm_one_reg *reg, void __user *uaddr) | |
295 | { | |
296 | __u64 *r = &vcpu->arch.vcpu_debug_state.dbg_bvr[rd->reg]; | |
297 | ||
1713e5aa | 298 | if (copy_from_user(r, uaddr, KVM_REG_SIZE(reg->id)) != 0) |
84e690bf AB |
299 | return -EFAULT; |
300 | return 0; | |
301 | } | |
302 | ||
303 | static int get_bvr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, | |
304 | const struct kvm_one_reg *reg, void __user *uaddr) | |
305 | { | |
306 | __u64 *r = &vcpu->arch.vcpu_debug_state.dbg_bvr[rd->reg]; | |
307 | ||
308 | if (copy_to_user(uaddr, r, KVM_REG_SIZE(reg->id)) != 0) | |
309 | return -EFAULT; | |
310 | return 0; | |
311 | } | |
312 | ||
281243cb MZ |
313 | static void reset_bvr(struct kvm_vcpu *vcpu, |
314 | const struct sys_reg_desc *rd) | |
84e690bf AB |
315 | { |
316 | vcpu->arch.vcpu_debug_state.dbg_bvr[rd->reg] = rd->val; | |
317 | } | |
318 | ||
281243cb MZ |
319 | static bool trap_bcr(struct kvm_vcpu *vcpu, |
320 | struct sys_reg_params *p, | |
321 | const struct sys_reg_desc *rd) | |
84e690bf AB |
322 | { |
323 | u64 *dbg_reg = &vcpu->arch.vcpu_debug_state.dbg_bcr[rd->reg]; | |
324 | ||
325 | if (p->is_write) | |
326 | reg_to_dbg(vcpu, p, dbg_reg); | |
327 | else | |
328 | dbg_to_reg(vcpu, p, dbg_reg); | |
329 | ||
eef8c85a AB |
330 | trace_trap_reg(__func__, rd->reg, p->is_write, *dbg_reg); |
331 | ||
84e690bf AB |
332 | return true; |
333 | } | |
334 | ||
335 | static int set_bcr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, | |
336 | const struct kvm_one_reg *reg, void __user *uaddr) | |
337 | { | |
338 | __u64 *r = &vcpu->arch.vcpu_debug_state.dbg_bcr[rd->reg]; | |
339 | ||
1713e5aa | 340 | if (copy_from_user(r, uaddr, KVM_REG_SIZE(reg->id)) != 0) |
84e690bf AB |
341 | return -EFAULT; |
342 | ||
343 | return 0; | |
344 | } | |
345 | ||
346 | static int get_bcr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, | |
347 | const struct kvm_one_reg *reg, void __user *uaddr) | |
348 | { | |
349 | __u64 *r = &vcpu->arch.vcpu_debug_state.dbg_bcr[rd->reg]; | |
350 | ||
351 | if (copy_to_user(uaddr, r, KVM_REG_SIZE(reg->id)) != 0) | |
352 | return -EFAULT; | |
353 | return 0; | |
354 | } | |
355 | ||
281243cb MZ |
356 | static void reset_bcr(struct kvm_vcpu *vcpu, |
357 | const struct sys_reg_desc *rd) | |
84e690bf AB |
358 | { |
359 | vcpu->arch.vcpu_debug_state.dbg_bcr[rd->reg] = rd->val; | |
360 | } | |
361 | ||
281243cb MZ |
362 | static bool trap_wvr(struct kvm_vcpu *vcpu, |
363 | struct sys_reg_params *p, | |
364 | const struct sys_reg_desc *rd) | |
84e690bf AB |
365 | { |
366 | u64 *dbg_reg = &vcpu->arch.vcpu_debug_state.dbg_wvr[rd->reg]; | |
367 | ||
368 | if (p->is_write) | |
369 | reg_to_dbg(vcpu, p, dbg_reg); | |
370 | else | |
371 | dbg_to_reg(vcpu, p, dbg_reg); | |
372 | ||
eef8c85a AB |
373 | trace_trap_reg(__func__, rd->reg, p->is_write, |
374 | vcpu->arch.vcpu_debug_state.dbg_wvr[rd->reg]); | |
375 | ||
84e690bf AB |
376 | return true; |
377 | } | |
378 | ||
379 | static int set_wvr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, | |
380 | const struct kvm_one_reg *reg, void __user *uaddr) | |
381 | { | |
382 | __u64 *r = &vcpu->arch.vcpu_debug_state.dbg_wvr[rd->reg]; | |
383 | ||
1713e5aa | 384 | if (copy_from_user(r, uaddr, KVM_REG_SIZE(reg->id)) != 0) |
84e690bf AB |
385 | return -EFAULT; |
386 | return 0; | |
387 | } | |
388 | ||
389 | static int get_wvr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, | |
390 | const struct kvm_one_reg *reg, void __user *uaddr) | |
391 | { | |
392 | __u64 *r = &vcpu->arch.vcpu_debug_state.dbg_wvr[rd->reg]; | |
393 | ||
394 | if (copy_to_user(uaddr, r, KVM_REG_SIZE(reg->id)) != 0) | |
395 | return -EFAULT; | |
396 | return 0; | |
397 | } | |
398 | ||
281243cb MZ |
399 | static void reset_wvr(struct kvm_vcpu *vcpu, |
400 | const struct sys_reg_desc *rd) | |
84e690bf AB |
401 | { |
402 | vcpu->arch.vcpu_debug_state.dbg_wvr[rd->reg] = rd->val; | |
403 | } | |
404 | ||
281243cb MZ |
405 | static bool trap_wcr(struct kvm_vcpu *vcpu, |
406 | struct sys_reg_params *p, | |
407 | const struct sys_reg_desc *rd) | |
84e690bf AB |
408 | { |
409 | u64 *dbg_reg = &vcpu->arch.vcpu_debug_state.dbg_wcr[rd->reg]; | |
410 | ||
411 | if (p->is_write) | |
412 | reg_to_dbg(vcpu, p, dbg_reg); | |
413 | else | |
414 | dbg_to_reg(vcpu, p, dbg_reg); | |
415 | ||
eef8c85a AB |
416 | trace_trap_reg(__func__, rd->reg, p->is_write, *dbg_reg); |
417 | ||
84e690bf AB |
418 | return true; |
419 | } | |
420 | ||
421 | static int set_wcr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, | |
422 | const struct kvm_one_reg *reg, void __user *uaddr) | |
423 | { | |
424 | __u64 *r = &vcpu->arch.vcpu_debug_state.dbg_wcr[rd->reg]; | |
425 | ||
1713e5aa | 426 | if (copy_from_user(r, uaddr, KVM_REG_SIZE(reg->id)) != 0) |
84e690bf AB |
427 | return -EFAULT; |
428 | return 0; | |
429 | } | |
430 | ||
431 | static int get_wcr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, | |
432 | const struct kvm_one_reg *reg, void __user *uaddr) | |
433 | { | |
434 | __u64 *r = &vcpu->arch.vcpu_debug_state.dbg_wcr[rd->reg]; | |
435 | ||
436 | if (copy_to_user(uaddr, r, KVM_REG_SIZE(reg->id)) != 0) | |
437 | return -EFAULT; | |
438 | return 0; | |
439 | } | |
440 | ||
281243cb MZ |
441 | static void reset_wcr(struct kvm_vcpu *vcpu, |
442 | const struct sys_reg_desc *rd) | |
84e690bf AB |
443 | { |
444 | vcpu->arch.vcpu_debug_state.dbg_wcr[rd->reg] = rd->val; | |
445 | } | |
446 | ||
7c8c5e6a MZ |
447 | static void reset_amair_el1(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r) |
448 | { | |
1f3d8699 | 449 | vcpu_sys_reg(vcpu, AMAIR_EL1) = read_sysreg(amair_el1); |
7c8c5e6a MZ |
450 | } |
451 | ||
452 | static void reset_mpidr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r) | |
453 | { | |
4429fc64 AP |
454 | u64 mpidr; |
455 | ||
7c8c5e6a | 456 | /* |
4429fc64 AP |
457 | * Map the vcpu_id into the first three affinity level fields of |
458 | * the MPIDR. We limit the number of VCPUs in level 0 due to a | |
459 | * limitation to 16 CPUs in that level in the ICC_SGIxR registers | |
460 | * of the GICv3 to be able to address each CPU directly when | |
461 | * sending IPIs. | |
7c8c5e6a | 462 | */ |
4429fc64 AP |
463 | mpidr = (vcpu->vcpu_id & 0x0f) << MPIDR_LEVEL_SHIFT(0); |
464 | mpidr |= ((vcpu->vcpu_id >> 4) & 0xff) << MPIDR_LEVEL_SHIFT(1); | |
465 | mpidr |= ((vcpu->vcpu_id >> 12) & 0xff) << MPIDR_LEVEL_SHIFT(2); | |
466 | vcpu_sys_reg(vcpu, MPIDR_EL1) = (1ULL << 31) | mpidr; | |
7c8c5e6a MZ |
467 | } |
468 | ||
ab946834 SZ |
469 | static void reset_pmcr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r) |
470 | { | |
471 | u64 pmcr, val; | |
472 | ||
1f3d8699 MR |
473 | pmcr = read_sysreg(pmcr_el0); |
474 | /* | |
475 | * Writable bits of PMCR_EL0 (ARMV8_PMU_PMCR_MASK) are reset to UNKNOWN | |
ab946834 SZ |
476 | * except PMCR.E resetting to zero. |
477 | */ | |
478 | val = ((pmcr & ~ARMV8_PMU_PMCR_MASK) | |
479 | | (ARMV8_PMU_PMCR_MASK & 0xdecafbad)) & (~ARMV8_PMU_PMCR_E); | |
480 | vcpu_sys_reg(vcpu, PMCR_EL0) = val; | |
481 | } | |
482 | ||
6c007036 | 483 | static bool check_pmu_access_disabled(struct kvm_vcpu *vcpu, u64 flags) |
d692b8ad SZ |
484 | { |
485 | u64 reg = vcpu_sys_reg(vcpu, PMUSERENR_EL0); | |
6c007036 | 486 | bool enabled = (reg & flags) || vcpu_mode_priv(vcpu); |
d692b8ad | 487 | |
24d5950f MZ |
488 | if (!enabled) |
489 | kvm_inject_undefined(vcpu); | |
d692b8ad | 490 | |
6c007036 | 491 | return !enabled; |
d692b8ad SZ |
492 | } |
493 | ||
6c007036 | 494 | static bool pmu_access_el0_disabled(struct kvm_vcpu *vcpu) |
d692b8ad | 495 | { |
6c007036 MZ |
496 | return check_pmu_access_disabled(vcpu, ARMV8_PMU_USERENR_EN); |
497 | } | |
d692b8ad | 498 | |
6c007036 MZ |
499 | static bool pmu_write_swinc_el0_disabled(struct kvm_vcpu *vcpu) |
500 | { | |
501 | return check_pmu_access_disabled(vcpu, ARMV8_PMU_USERENR_SW | ARMV8_PMU_USERENR_EN); | |
d692b8ad SZ |
502 | } |
503 | ||
504 | static bool pmu_access_cycle_counter_el0_disabled(struct kvm_vcpu *vcpu) | |
505 | { | |
6c007036 | 506 | return check_pmu_access_disabled(vcpu, ARMV8_PMU_USERENR_CR | ARMV8_PMU_USERENR_EN); |
d692b8ad SZ |
507 | } |
508 | ||
509 | static bool pmu_access_event_counter_el0_disabled(struct kvm_vcpu *vcpu) | |
510 | { | |
6c007036 | 511 | return check_pmu_access_disabled(vcpu, ARMV8_PMU_USERENR_ER | ARMV8_PMU_USERENR_EN); |
d692b8ad SZ |
512 | } |
513 | ||
ab946834 SZ |
514 | static bool access_pmcr(struct kvm_vcpu *vcpu, struct sys_reg_params *p, |
515 | const struct sys_reg_desc *r) | |
516 | { | |
517 | u64 val; | |
518 | ||
519 | if (!kvm_arm_pmu_v3_ready(vcpu)) | |
520 | return trap_raz_wi(vcpu, p, r); | |
521 | ||
d692b8ad SZ |
522 | if (pmu_access_el0_disabled(vcpu)) |
523 | return false; | |
524 | ||
ab946834 SZ |
525 | if (p->is_write) { |
526 | /* Only update writeable bits of PMCR */ | |
527 | val = vcpu_sys_reg(vcpu, PMCR_EL0); | |
528 | val &= ~ARMV8_PMU_PMCR_MASK; | |
529 | val |= p->regval & ARMV8_PMU_PMCR_MASK; | |
530 | vcpu_sys_reg(vcpu, PMCR_EL0) = val; | |
76993739 | 531 | kvm_pmu_handle_pmcr(vcpu, val); |
ab946834 SZ |
532 | } else { |
533 | /* PMCR.P & PMCR.C are RAZ */ | |
534 | val = vcpu_sys_reg(vcpu, PMCR_EL0) | |
535 | & ~(ARMV8_PMU_PMCR_P | ARMV8_PMU_PMCR_C); | |
536 | p->regval = val; | |
537 | } | |
538 | ||
539 | return true; | |
540 | } | |
541 | ||
3965c3ce SZ |
542 | static bool access_pmselr(struct kvm_vcpu *vcpu, struct sys_reg_params *p, |
543 | const struct sys_reg_desc *r) | |
544 | { | |
545 | if (!kvm_arm_pmu_v3_ready(vcpu)) | |
546 | return trap_raz_wi(vcpu, p, r); | |
547 | ||
d692b8ad SZ |
548 | if (pmu_access_event_counter_el0_disabled(vcpu)) |
549 | return false; | |
550 | ||
3965c3ce SZ |
551 | if (p->is_write) |
552 | vcpu_sys_reg(vcpu, PMSELR_EL0) = p->regval; | |
553 | else | |
554 | /* return PMSELR.SEL field */ | |
555 | p->regval = vcpu_sys_reg(vcpu, PMSELR_EL0) | |
556 | & ARMV8_PMU_COUNTER_MASK; | |
557 | ||
558 | return true; | |
559 | } | |
560 | ||
a86b5505 SZ |
561 | static bool access_pmceid(struct kvm_vcpu *vcpu, struct sys_reg_params *p, |
562 | const struct sys_reg_desc *r) | |
563 | { | |
564 | u64 pmceid; | |
565 | ||
566 | if (!kvm_arm_pmu_v3_ready(vcpu)) | |
567 | return trap_raz_wi(vcpu, p, r); | |
568 | ||
569 | BUG_ON(p->is_write); | |
570 | ||
d692b8ad SZ |
571 | if (pmu_access_el0_disabled(vcpu)) |
572 | return false; | |
573 | ||
a86b5505 | 574 | if (!(p->Op2 & 1)) |
1f3d8699 | 575 | pmceid = read_sysreg(pmceid0_el0); |
a86b5505 | 576 | else |
1f3d8699 | 577 | pmceid = read_sysreg(pmceid1_el0); |
a86b5505 SZ |
578 | |
579 | p->regval = pmceid; | |
580 | ||
581 | return true; | |
582 | } | |
583 | ||
051ff581 SZ |
584 | static bool pmu_counter_idx_valid(struct kvm_vcpu *vcpu, u64 idx) |
585 | { | |
586 | u64 pmcr, val; | |
587 | ||
588 | pmcr = vcpu_sys_reg(vcpu, PMCR_EL0); | |
589 | val = (pmcr >> ARMV8_PMU_PMCR_N_SHIFT) & ARMV8_PMU_PMCR_N_MASK; | |
24d5950f MZ |
590 | if (idx >= val && idx != ARMV8_PMU_CYCLE_IDX) { |
591 | kvm_inject_undefined(vcpu); | |
051ff581 | 592 | return false; |
24d5950f | 593 | } |
051ff581 SZ |
594 | |
595 | return true; | |
596 | } | |
597 | ||
598 | static bool access_pmu_evcntr(struct kvm_vcpu *vcpu, | |
599 | struct sys_reg_params *p, | |
600 | const struct sys_reg_desc *r) | |
601 | { | |
602 | u64 idx; | |
603 | ||
604 | if (!kvm_arm_pmu_v3_ready(vcpu)) | |
605 | return trap_raz_wi(vcpu, p, r); | |
606 | ||
607 | if (r->CRn == 9 && r->CRm == 13) { | |
608 | if (r->Op2 == 2) { | |
609 | /* PMXEVCNTR_EL0 */ | |
d692b8ad SZ |
610 | if (pmu_access_event_counter_el0_disabled(vcpu)) |
611 | return false; | |
612 | ||
051ff581 SZ |
613 | idx = vcpu_sys_reg(vcpu, PMSELR_EL0) |
614 | & ARMV8_PMU_COUNTER_MASK; | |
615 | } else if (r->Op2 == 0) { | |
616 | /* PMCCNTR_EL0 */ | |
d692b8ad SZ |
617 | if (pmu_access_cycle_counter_el0_disabled(vcpu)) |
618 | return false; | |
619 | ||
051ff581 SZ |
620 | idx = ARMV8_PMU_CYCLE_IDX; |
621 | } else { | |
9e3f7a29 | 622 | return false; |
051ff581 | 623 | } |
9e3f7a29 WH |
624 | } else if (r->CRn == 0 && r->CRm == 9) { |
625 | /* PMCCNTR */ | |
626 | if (pmu_access_event_counter_el0_disabled(vcpu)) | |
627 | return false; | |
628 | ||
629 | idx = ARMV8_PMU_CYCLE_IDX; | |
051ff581 SZ |
630 | } else if (r->CRn == 14 && (r->CRm & 12) == 8) { |
631 | /* PMEVCNTRn_EL0 */ | |
d692b8ad SZ |
632 | if (pmu_access_event_counter_el0_disabled(vcpu)) |
633 | return false; | |
634 | ||
051ff581 SZ |
635 | idx = ((r->CRm & 3) << 3) | (r->Op2 & 7); |
636 | } else { | |
9e3f7a29 | 637 | return false; |
051ff581 SZ |
638 | } |
639 | ||
640 | if (!pmu_counter_idx_valid(vcpu, idx)) | |
641 | return false; | |
642 | ||
d692b8ad SZ |
643 | if (p->is_write) { |
644 | if (pmu_access_el0_disabled(vcpu)) | |
645 | return false; | |
646 | ||
051ff581 | 647 | kvm_pmu_set_counter_value(vcpu, idx, p->regval); |
d692b8ad | 648 | } else { |
051ff581 | 649 | p->regval = kvm_pmu_get_counter_value(vcpu, idx); |
d692b8ad | 650 | } |
051ff581 SZ |
651 | |
652 | return true; | |
653 | } | |
654 | ||
9feb21ac SZ |
655 | static bool access_pmu_evtyper(struct kvm_vcpu *vcpu, struct sys_reg_params *p, |
656 | const struct sys_reg_desc *r) | |
657 | { | |
658 | u64 idx, reg; | |
659 | ||
660 | if (!kvm_arm_pmu_v3_ready(vcpu)) | |
661 | return trap_raz_wi(vcpu, p, r); | |
662 | ||
d692b8ad SZ |
663 | if (pmu_access_el0_disabled(vcpu)) |
664 | return false; | |
665 | ||
9feb21ac SZ |
666 | if (r->CRn == 9 && r->CRm == 13 && r->Op2 == 1) { |
667 | /* PMXEVTYPER_EL0 */ | |
668 | idx = vcpu_sys_reg(vcpu, PMSELR_EL0) & ARMV8_PMU_COUNTER_MASK; | |
669 | reg = PMEVTYPER0_EL0 + idx; | |
670 | } else if (r->CRn == 14 && (r->CRm & 12) == 12) { | |
671 | idx = ((r->CRm & 3) << 3) | (r->Op2 & 7); | |
672 | if (idx == ARMV8_PMU_CYCLE_IDX) | |
673 | reg = PMCCFILTR_EL0; | |
674 | else | |
675 | /* PMEVTYPERn_EL0 */ | |
676 | reg = PMEVTYPER0_EL0 + idx; | |
677 | } else { | |
678 | BUG(); | |
679 | } | |
680 | ||
681 | if (!pmu_counter_idx_valid(vcpu, idx)) | |
682 | return false; | |
683 | ||
684 | if (p->is_write) { | |
685 | kvm_pmu_set_counter_event_type(vcpu, p->regval, idx); | |
686 | vcpu_sys_reg(vcpu, reg) = p->regval & ARMV8_PMU_EVTYPE_MASK; | |
687 | } else { | |
688 | p->regval = vcpu_sys_reg(vcpu, reg) & ARMV8_PMU_EVTYPE_MASK; | |
689 | } | |
690 | ||
691 | return true; | |
692 | } | |
693 | ||
96b0eebc SZ |
694 | static bool access_pmcnten(struct kvm_vcpu *vcpu, struct sys_reg_params *p, |
695 | const struct sys_reg_desc *r) | |
696 | { | |
697 | u64 val, mask; | |
698 | ||
699 | if (!kvm_arm_pmu_v3_ready(vcpu)) | |
700 | return trap_raz_wi(vcpu, p, r); | |
701 | ||
d692b8ad SZ |
702 | if (pmu_access_el0_disabled(vcpu)) |
703 | return false; | |
704 | ||
96b0eebc SZ |
705 | mask = kvm_pmu_valid_counter_mask(vcpu); |
706 | if (p->is_write) { | |
707 | val = p->regval & mask; | |
708 | if (r->Op2 & 0x1) { | |
709 | /* accessing PMCNTENSET_EL0 */ | |
710 | vcpu_sys_reg(vcpu, PMCNTENSET_EL0) |= val; | |
711 | kvm_pmu_enable_counter(vcpu, val); | |
712 | } else { | |
713 | /* accessing PMCNTENCLR_EL0 */ | |
714 | vcpu_sys_reg(vcpu, PMCNTENSET_EL0) &= ~val; | |
715 | kvm_pmu_disable_counter(vcpu, val); | |
716 | } | |
717 | } else { | |
718 | p->regval = vcpu_sys_reg(vcpu, PMCNTENSET_EL0) & mask; | |
719 | } | |
720 | ||
721 | return true; | |
722 | } | |
723 | ||
9db52c78 SZ |
724 | static bool access_pminten(struct kvm_vcpu *vcpu, struct sys_reg_params *p, |
725 | const struct sys_reg_desc *r) | |
726 | { | |
727 | u64 mask = kvm_pmu_valid_counter_mask(vcpu); | |
728 | ||
729 | if (!kvm_arm_pmu_v3_ready(vcpu)) | |
730 | return trap_raz_wi(vcpu, p, r); | |
731 | ||
9008c235 MZ |
732 | if (!vcpu_mode_priv(vcpu)) { |
733 | kvm_inject_undefined(vcpu); | |
d692b8ad | 734 | return false; |
9008c235 | 735 | } |
d692b8ad | 736 | |
9db52c78 SZ |
737 | if (p->is_write) { |
738 | u64 val = p->regval & mask; | |
739 | ||
740 | if (r->Op2 & 0x1) | |
741 | /* accessing PMINTENSET_EL1 */ | |
742 | vcpu_sys_reg(vcpu, PMINTENSET_EL1) |= val; | |
743 | else | |
744 | /* accessing PMINTENCLR_EL1 */ | |
745 | vcpu_sys_reg(vcpu, PMINTENSET_EL1) &= ~val; | |
746 | } else { | |
747 | p->regval = vcpu_sys_reg(vcpu, PMINTENSET_EL1) & mask; | |
748 | } | |
749 | ||
750 | return true; | |
751 | } | |
752 | ||
76d883c4 SZ |
753 | static bool access_pmovs(struct kvm_vcpu *vcpu, struct sys_reg_params *p, |
754 | const struct sys_reg_desc *r) | |
755 | { | |
756 | u64 mask = kvm_pmu_valid_counter_mask(vcpu); | |
757 | ||
758 | if (!kvm_arm_pmu_v3_ready(vcpu)) | |
759 | return trap_raz_wi(vcpu, p, r); | |
760 | ||
d692b8ad SZ |
761 | if (pmu_access_el0_disabled(vcpu)) |
762 | return false; | |
763 | ||
76d883c4 SZ |
764 | if (p->is_write) { |
765 | if (r->CRm & 0x2) | |
766 | /* accessing PMOVSSET_EL0 */ | |
d9f89b4e | 767 | vcpu_sys_reg(vcpu, PMOVSSET_EL0) |= (p->regval & mask); |
76d883c4 SZ |
768 | else |
769 | /* accessing PMOVSCLR_EL0 */ | |
770 | vcpu_sys_reg(vcpu, PMOVSSET_EL0) &= ~(p->regval & mask); | |
771 | } else { | |
772 | p->regval = vcpu_sys_reg(vcpu, PMOVSSET_EL0) & mask; | |
773 | } | |
774 | ||
775 | return true; | |
776 | } | |
777 | ||
7a0adc70 SZ |
778 | static bool access_pmswinc(struct kvm_vcpu *vcpu, struct sys_reg_params *p, |
779 | const struct sys_reg_desc *r) | |
780 | { | |
781 | u64 mask; | |
782 | ||
783 | if (!kvm_arm_pmu_v3_ready(vcpu)) | |
784 | return trap_raz_wi(vcpu, p, r); | |
785 | ||
e0443230 | 786 | if (!p->is_write) |
e7f1d1ee | 787 | return read_from_write_only(vcpu, p, r); |
e0443230 | 788 | |
d692b8ad SZ |
789 | if (pmu_write_swinc_el0_disabled(vcpu)) |
790 | return false; | |
791 | ||
e0443230 MZ |
792 | mask = kvm_pmu_valid_counter_mask(vcpu); |
793 | kvm_pmu_software_increment(vcpu, p->regval & mask); | |
794 | return true; | |
7a0adc70 SZ |
795 | } |
796 | ||
d692b8ad SZ |
797 | static bool access_pmuserenr(struct kvm_vcpu *vcpu, struct sys_reg_params *p, |
798 | const struct sys_reg_desc *r) | |
799 | { | |
800 | if (!kvm_arm_pmu_v3_ready(vcpu)) | |
801 | return trap_raz_wi(vcpu, p, r); | |
802 | ||
803 | if (p->is_write) { | |
9008c235 MZ |
804 | if (!vcpu_mode_priv(vcpu)) { |
805 | kvm_inject_undefined(vcpu); | |
d692b8ad | 806 | return false; |
9008c235 | 807 | } |
d692b8ad SZ |
808 | |
809 | vcpu_sys_reg(vcpu, PMUSERENR_EL0) = p->regval | |
810 | & ARMV8_PMU_USERENR_MASK; | |
811 | } else { | |
812 | p->regval = vcpu_sys_reg(vcpu, PMUSERENR_EL0) | |
813 | & ARMV8_PMU_USERENR_MASK; | |
814 | } | |
815 | ||
816 | return true; | |
817 | } | |
818 | ||
0c557ed4 MZ |
819 | /* Silly macro to expand the DBG{BCR,BVR,WVR,WCR}n_EL1 registers in one go */ |
820 | #define DBG_BCR_BVR_WCR_WVR_EL1(n) \ | |
ee1b64e6 | 821 | { SYS_DESC(SYS_DBGBVRn_EL1(n)), \ |
84e690bf | 822 | trap_bvr, reset_bvr, n, 0, get_bvr, set_bvr }, \ |
ee1b64e6 | 823 | { SYS_DESC(SYS_DBGBCRn_EL1(n)), \ |
84e690bf | 824 | trap_bcr, reset_bcr, n, 0, get_bcr, set_bcr }, \ |
ee1b64e6 | 825 | { SYS_DESC(SYS_DBGWVRn_EL1(n)), \ |
84e690bf | 826 | trap_wvr, reset_wvr, n, 0, get_wvr, set_wvr }, \ |
ee1b64e6 | 827 | { SYS_DESC(SYS_DBGWCRn_EL1(n)), \ |
84e690bf | 828 | trap_wcr, reset_wcr, n, 0, get_wcr, set_wcr } |
0c557ed4 | 829 | |
051ff581 SZ |
830 | /* Macro to expand the PMEVCNTRn_EL0 register */ |
831 | #define PMU_PMEVCNTR_EL0(n) \ | |
174ed3e4 | 832 | { SYS_DESC(SYS_PMEVCNTRn_EL0(n)), \ |
051ff581 SZ |
833 | access_pmu_evcntr, reset_unknown, (PMEVCNTR0_EL0 + n), } |
834 | ||
9feb21ac SZ |
835 | /* Macro to expand the PMEVTYPERn_EL0 register */ |
836 | #define PMU_PMEVTYPER_EL0(n) \ | |
174ed3e4 | 837 | { SYS_DESC(SYS_PMEVTYPERn_EL0(n)), \ |
9feb21ac SZ |
838 | access_pmu_evtyper, reset_unknown, (PMEVTYPER0_EL0 + n), } |
839 | ||
c9a3c58f JL |
840 | static bool access_cntp_tval(struct kvm_vcpu *vcpu, |
841 | struct sys_reg_params *p, | |
842 | const struct sys_reg_desc *r) | |
843 | { | |
7b6b4631 JL |
844 | struct arch_timer_context *ptimer = vcpu_ptimer(vcpu); |
845 | u64 now = kvm_phys_timer_read(); | |
846 | ||
847 | if (p->is_write) | |
848 | ptimer->cnt_cval = p->regval + now; | |
849 | else | |
850 | p->regval = ptimer->cnt_cval - now; | |
851 | ||
c9a3c58f JL |
852 | return true; |
853 | } | |
854 | ||
855 | static bool access_cntp_ctl(struct kvm_vcpu *vcpu, | |
856 | struct sys_reg_params *p, | |
857 | const struct sys_reg_desc *r) | |
858 | { | |
7b6b4631 JL |
859 | struct arch_timer_context *ptimer = vcpu_ptimer(vcpu); |
860 | ||
861 | if (p->is_write) { | |
862 | /* ISTATUS bit is read-only */ | |
863 | ptimer->cnt_ctl = p->regval & ~ARCH_TIMER_CTRL_IT_STAT; | |
864 | } else { | |
865 | u64 now = kvm_phys_timer_read(); | |
866 | ||
867 | p->regval = ptimer->cnt_ctl; | |
868 | /* | |
869 | * Set ISTATUS bit if it's expired. | |
870 | * Note that according to ARMv8 ARM Issue A.k, ISTATUS bit is | |
871 | * UNKNOWN when ENABLE bit is 0, so we chose to set ISTATUS bit | |
872 | * regardless of ENABLE bit for our implementation convenience. | |
873 | */ | |
874 | if (ptimer->cnt_cval <= now) | |
875 | p->regval |= ARCH_TIMER_CTRL_IT_STAT; | |
876 | } | |
877 | ||
c9a3c58f JL |
878 | return true; |
879 | } | |
880 | ||
881 | static bool access_cntp_cval(struct kvm_vcpu *vcpu, | |
882 | struct sys_reg_params *p, | |
883 | const struct sys_reg_desc *r) | |
884 | { | |
7b6b4631 JL |
885 | struct arch_timer_context *ptimer = vcpu_ptimer(vcpu); |
886 | ||
887 | if (p->is_write) | |
888 | ptimer->cnt_cval = p->regval; | |
889 | else | |
890 | p->regval = ptimer->cnt_cval; | |
891 | ||
c9a3c58f JL |
892 | return true; |
893 | } | |
894 | ||
7c8c5e6a MZ |
895 | /* |
896 | * Architected system registers. | |
897 | * Important: Must be sorted ascending by Op0, Op1, CRn, CRm, Op2 | |
7609c125 | 898 | * |
0c557ed4 MZ |
899 | * Debug handling: We do trap most, if not all debug related system |
900 | * registers. The implementation is good enough to ensure that a guest | |
901 | * can use these with minimal performance degradation. The drawback is | |
902 | * that we don't implement any of the external debug, none of the | |
903 | * OSlock protocol. This should be revisited if we ever encounter a | |
904 | * more demanding guest... | |
7c8c5e6a MZ |
905 | */ |
906 | static const struct sys_reg_desc sys_reg_descs[] = { | |
7606e078 MR |
907 | { SYS_DESC(SYS_DC_ISW), access_dcsw }, |
908 | { SYS_DESC(SYS_DC_CSW), access_dcsw }, | |
909 | { SYS_DESC(SYS_DC_CISW), access_dcsw }, | |
7c8c5e6a | 910 | |
0c557ed4 MZ |
911 | DBG_BCR_BVR_WCR_WVR_EL1(0), |
912 | DBG_BCR_BVR_WCR_WVR_EL1(1), | |
ee1b64e6 MR |
913 | { SYS_DESC(SYS_MDCCINT_EL1), trap_debug_regs, reset_val, MDCCINT_EL1, 0 }, |
914 | { SYS_DESC(SYS_MDSCR_EL1), trap_debug_regs, reset_val, MDSCR_EL1, 0 }, | |
0c557ed4 MZ |
915 | DBG_BCR_BVR_WCR_WVR_EL1(2), |
916 | DBG_BCR_BVR_WCR_WVR_EL1(3), | |
917 | DBG_BCR_BVR_WCR_WVR_EL1(4), | |
918 | DBG_BCR_BVR_WCR_WVR_EL1(5), | |
919 | DBG_BCR_BVR_WCR_WVR_EL1(6), | |
920 | DBG_BCR_BVR_WCR_WVR_EL1(7), | |
921 | DBG_BCR_BVR_WCR_WVR_EL1(8), | |
922 | DBG_BCR_BVR_WCR_WVR_EL1(9), | |
923 | DBG_BCR_BVR_WCR_WVR_EL1(10), | |
924 | DBG_BCR_BVR_WCR_WVR_EL1(11), | |
925 | DBG_BCR_BVR_WCR_WVR_EL1(12), | |
926 | DBG_BCR_BVR_WCR_WVR_EL1(13), | |
927 | DBG_BCR_BVR_WCR_WVR_EL1(14), | |
928 | DBG_BCR_BVR_WCR_WVR_EL1(15), | |
929 | ||
ee1b64e6 MR |
930 | { SYS_DESC(SYS_MDRAR_EL1), trap_raz_wi }, |
931 | { SYS_DESC(SYS_OSLAR_EL1), trap_raz_wi }, | |
932 | { SYS_DESC(SYS_OSLSR_EL1), trap_oslsr_el1 }, | |
933 | { SYS_DESC(SYS_OSDLR_EL1), trap_raz_wi }, | |
934 | { SYS_DESC(SYS_DBGPRCR_EL1), trap_raz_wi }, | |
935 | { SYS_DESC(SYS_DBGCLAIMSET_EL1), trap_raz_wi }, | |
936 | { SYS_DESC(SYS_DBGCLAIMCLR_EL1), trap_raz_wi }, | |
937 | { SYS_DESC(SYS_DBGAUTHSTATUS_EL1), trap_dbgauthstatus_el1 }, | |
938 | ||
939 | { SYS_DESC(SYS_MDCCSR_EL0), trap_raz_wi }, | |
940 | { SYS_DESC(SYS_DBGDTR_EL0), trap_raz_wi }, | |
941 | // DBGDTR[TR]X_EL0 share the same encoding | |
942 | { SYS_DESC(SYS_DBGDTRTX_EL0), trap_raz_wi }, | |
943 | ||
944 | { SYS_DESC(SYS_DBGVCR32_EL2), NULL, reset_val, DBGVCR32_EL2, 0 }, | |
62a89c44 | 945 | |
851050a5 MR |
946 | { SYS_DESC(SYS_MPIDR_EL1), NULL, reset_mpidr, MPIDR_EL1 }, |
947 | { SYS_DESC(SYS_SCTLR_EL1), access_vm_reg, reset_val, SCTLR_EL1, 0x00C50078 }, | |
948 | { SYS_DESC(SYS_CPACR_EL1), NULL, reset_val, CPACR_EL1, 0 }, | |
949 | { SYS_DESC(SYS_TTBR0_EL1), access_vm_reg, reset_unknown, TTBR0_EL1 }, | |
950 | { SYS_DESC(SYS_TTBR1_EL1), access_vm_reg, reset_unknown, TTBR1_EL1 }, | |
951 | { SYS_DESC(SYS_TCR_EL1), access_vm_reg, reset_val, TCR_EL1, 0 }, | |
952 | ||
953 | { SYS_DESC(SYS_AFSR0_EL1), access_vm_reg, reset_unknown, AFSR0_EL1 }, | |
954 | { SYS_DESC(SYS_AFSR1_EL1), access_vm_reg, reset_unknown, AFSR1_EL1 }, | |
955 | { SYS_DESC(SYS_ESR_EL1), access_vm_reg, reset_unknown, ESR_EL1 }, | |
956 | { SYS_DESC(SYS_FAR_EL1), access_vm_reg, reset_unknown, FAR_EL1 }, | |
957 | { SYS_DESC(SYS_PAR_EL1), NULL, reset_unknown, PAR_EL1 }, | |
7c8c5e6a | 958 | |
174ed3e4 MR |
959 | { SYS_DESC(SYS_PMINTENSET_EL1), access_pminten, reset_unknown, PMINTENSET_EL1 }, |
960 | { SYS_DESC(SYS_PMINTENCLR_EL1), access_pminten, NULL, PMINTENSET_EL1 }, | |
7c8c5e6a | 961 | |
851050a5 MR |
962 | { SYS_DESC(SYS_MAIR_EL1), access_vm_reg, reset_unknown, MAIR_EL1 }, |
963 | { SYS_DESC(SYS_AMAIR_EL1), access_vm_reg, reset_amair_el1, AMAIR_EL1 }, | |
7c8c5e6a | 964 | |
851050a5 | 965 | { SYS_DESC(SYS_VBAR_EL1), NULL, reset_val, VBAR_EL1, 0 }, |
db7dedd0 | 966 | |
7b1dba1f | 967 | { SYS_DESC(SYS_ICC_IAR0_EL1), write_to_read_only }, |
e7f1d1ee | 968 | { SYS_DESC(SYS_ICC_EOIR0_EL1), read_from_write_only }, |
7b1dba1f | 969 | { SYS_DESC(SYS_ICC_HPPIR0_EL1), write_to_read_only }, |
e7f1d1ee | 970 | { SYS_DESC(SYS_ICC_DIR_EL1), read_from_write_only }, |
7b1dba1f | 971 | { SYS_DESC(SYS_ICC_RPR_EL1), write_to_read_only }, |
e804d208 | 972 | { SYS_DESC(SYS_ICC_SGI1R_EL1), access_gic_sgi }, |
7b1dba1f | 973 | { SYS_DESC(SYS_ICC_IAR1_EL1), write_to_read_only }, |
e7f1d1ee | 974 | { SYS_DESC(SYS_ICC_EOIR1_EL1), read_from_write_only }, |
7b1dba1f | 975 | { SYS_DESC(SYS_ICC_HPPIR1_EL1), write_to_read_only }, |
e804d208 | 976 | { SYS_DESC(SYS_ICC_SRE_EL1), access_gic_sre }, |
db7dedd0 | 977 | |
851050a5 MR |
978 | { SYS_DESC(SYS_CONTEXTIDR_EL1), access_vm_reg, reset_val, CONTEXTIDR_EL1, 0 }, |
979 | { SYS_DESC(SYS_TPIDR_EL1), NULL, reset_unknown, TPIDR_EL1 }, | |
7c8c5e6a | 980 | |
851050a5 | 981 | { SYS_DESC(SYS_CNTKCTL_EL1), NULL, reset_val, CNTKCTL_EL1, 0}, |
7c8c5e6a | 982 | |
851050a5 | 983 | { SYS_DESC(SYS_CSSELR_EL1), NULL, reset_unknown, CSSELR_EL1 }, |
7c8c5e6a | 984 | |
174ed3e4 MR |
985 | { SYS_DESC(SYS_PMCR_EL0), access_pmcr, reset_pmcr, }, |
986 | { SYS_DESC(SYS_PMCNTENSET_EL0), access_pmcnten, reset_unknown, PMCNTENSET_EL0 }, | |
987 | { SYS_DESC(SYS_PMCNTENCLR_EL0), access_pmcnten, NULL, PMCNTENSET_EL0 }, | |
988 | { SYS_DESC(SYS_PMOVSCLR_EL0), access_pmovs, NULL, PMOVSSET_EL0 }, | |
989 | { SYS_DESC(SYS_PMSWINC_EL0), access_pmswinc, reset_unknown, PMSWINC_EL0 }, | |
990 | { SYS_DESC(SYS_PMSELR_EL0), access_pmselr, reset_unknown, PMSELR_EL0 }, | |
991 | { SYS_DESC(SYS_PMCEID0_EL0), access_pmceid }, | |
992 | { SYS_DESC(SYS_PMCEID1_EL0), access_pmceid }, | |
993 | { SYS_DESC(SYS_PMCCNTR_EL0), access_pmu_evcntr, reset_unknown, PMCCNTR_EL0 }, | |
994 | { SYS_DESC(SYS_PMXEVTYPER_EL0), access_pmu_evtyper }, | |
995 | { SYS_DESC(SYS_PMXEVCNTR_EL0), access_pmu_evcntr }, | |
996 | /* | |
997 | * PMUSERENR_EL0 resets as unknown in 64bit mode while it resets as zero | |
d692b8ad SZ |
998 | * in 32bit mode. Here we choose to reset it as zero for consistency. |
999 | */ | |
174ed3e4 MR |
1000 | { SYS_DESC(SYS_PMUSERENR_EL0), access_pmuserenr, reset_val, PMUSERENR_EL0, 0 }, |
1001 | { SYS_DESC(SYS_PMOVSSET_EL0), access_pmovs, reset_unknown, PMOVSSET_EL0 }, | |
7c8c5e6a | 1002 | |
851050a5 MR |
1003 | { SYS_DESC(SYS_TPIDR_EL0), NULL, reset_unknown, TPIDR_EL0 }, |
1004 | { SYS_DESC(SYS_TPIDRRO_EL0), NULL, reset_unknown, TPIDRRO_EL0 }, | |
62a89c44 | 1005 | |
b2d693ce MR |
1006 | { SYS_DESC(SYS_CNTP_TVAL_EL0), access_cntp_tval }, |
1007 | { SYS_DESC(SYS_CNTP_CTL_EL0), access_cntp_ctl }, | |
1008 | { SYS_DESC(SYS_CNTP_CVAL_EL0), access_cntp_cval }, | |
c9a3c58f | 1009 | |
051ff581 SZ |
1010 | /* PMEVCNTRn_EL0 */ |
1011 | PMU_PMEVCNTR_EL0(0), | |
1012 | PMU_PMEVCNTR_EL0(1), | |
1013 | PMU_PMEVCNTR_EL0(2), | |
1014 | PMU_PMEVCNTR_EL0(3), | |
1015 | PMU_PMEVCNTR_EL0(4), | |
1016 | PMU_PMEVCNTR_EL0(5), | |
1017 | PMU_PMEVCNTR_EL0(6), | |
1018 | PMU_PMEVCNTR_EL0(7), | |
1019 | PMU_PMEVCNTR_EL0(8), | |
1020 | PMU_PMEVCNTR_EL0(9), | |
1021 | PMU_PMEVCNTR_EL0(10), | |
1022 | PMU_PMEVCNTR_EL0(11), | |
1023 | PMU_PMEVCNTR_EL0(12), | |
1024 | PMU_PMEVCNTR_EL0(13), | |
1025 | PMU_PMEVCNTR_EL0(14), | |
1026 | PMU_PMEVCNTR_EL0(15), | |
1027 | PMU_PMEVCNTR_EL0(16), | |
1028 | PMU_PMEVCNTR_EL0(17), | |
1029 | PMU_PMEVCNTR_EL0(18), | |
1030 | PMU_PMEVCNTR_EL0(19), | |
1031 | PMU_PMEVCNTR_EL0(20), | |
1032 | PMU_PMEVCNTR_EL0(21), | |
1033 | PMU_PMEVCNTR_EL0(22), | |
1034 | PMU_PMEVCNTR_EL0(23), | |
1035 | PMU_PMEVCNTR_EL0(24), | |
1036 | PMU_PMEVCNTR_EL0(25), | |
1037 | PMU_PMEVCNTR_EL0(26), | |
1038 | PMU_PMEVCNTR_EL0(27), | |
1039 | PMU_PMEVCNTR_EL0(28), | |
1040 | PMU_PMEVCNTR_EL0(29), | |
1041 | PMU_PMEVCNTR_EL0(30), | |
9feb21ac SZ |
1042 | /* PMEVTYPERn_EL0 */ |
1043 | PMU_PMEVTYPER_EL0(0), | |
1044 | PMU_PMEVTYPER_EL0(1), | |
1045 | PMU_PMEVTYPER_EL0(2), | |
1046 | PMU_PMEVTYPER_EL0(3), | |
1047 | PMU_PMEVTYPER_EL0(4), | |
1048 | PMU_PMEVTYPER_EL0(5), | |
1049 | PMU_PMEVTYPER_EL0(6), | |
1050 | PMU_PMEVTYPER_EL0(7), | |
1051 | PMU_PMEVTYPER_EL0(8), | |
1052 | PMU_PMEVTYPER_EL0(9), | |
1053 | PMU_PMEVTYPER_EL0(10), | |
1054 | PMU_PMEVTYPER_EL0(11), | |
1055 | PMU_PMEVTYPER_EL0(12), | |
1056 | PMU_PMEVTYPER_EL0(13), | |
1057 | PMU_PMEVTYPER_EL0(14), | |
1058 | PMU_PMEVTYPER_EL0(15), | |
1059 | PMU_PMEVTYPER_EL0(16), | |
1060 | PMU_PMEVTYPER_EL0(17), | |
1061 | PMU_PMEVTYPER_EL0(18), | |
1062 | PMU_PMEVTYPER_EL0(19), | |
1063 | PMU_PMEVTYPER_EL0(20), | |
1064 | PMU_PMEVTYPER_EL0(21), | |
1065 | PMU_PMEVTYPER_EL0(22), | |
1066 | PMU_PMEVTYPER_EL0(23), | |
1067 | PMU_PMEVTYPER_EL0(24), | |
1068 | PMU_PMEVTYPER_EL0(25), | |
1069 | PMU_PMEVTYPER_EL0(26), | |
1070 | PMU_PMEVTYPER_EL0(27), | |
1071 | PMU_PMEVTYPER_EL0(28), | |
1072 | PMU_PMEVTYPER_EL0(29), | |
1073 | PMU_PMEVTYPER_EL0(30), | |
174ed3e4 MR |
1074 | /* |
1075 | * PMCCFILTR_EL0 resets as unknown in 64bit mode while it resets as zero | |
9feb21ac SZ |
1076 | * in 32bit mode. Here we choose to reset it as zero for consistency. |
1077 | */ | |
174ed3e4 | 1078 | { SYS_DESC(SYS_PMCCFILTR_EL0), access_pmu_evtyper, reset_val, PMCCFILTR_EL0, 0 }, |
051ff581 | 1079 | |
851050a5 MR |
1080 | { SYS_DESC(SYS_DACR32_EL2), NULL, reset_unknown, DACR32_EL2 }, |
1081 | { SYS_DESC(SYS_IFSR32_EL2), NULL, reset_unknown, IFSR32_EL2 }, | |
1082 | { SYS_DESC(SYS_FPEXC32_EL2), NULL, reset_val, FPEXC32_EL2, 0x70 }, | |
62a89c44 MZ |
1083 | }; |
1084 | ||
bdfb4b38 | 1085 | static bool trap_dbgidr(struct kvm_vcpu *vcpu, |
3fec037d | 1086 | struct sys_reg_params *p, |
bdfb4b38 MZ |
1087 | const struct sys_reg_desc *r) |
1088 | { | |
1089 | if (p->is_write) { | |
1090 | return ignore_write(vcpu, p); | |
1091 | } else { | |
46823dd1 DM |
1092 | u64 dfr = read_sanitised_ftr_reg(SYS_ID_AA64DFR0_EL1); |
1093 | u64 pfr = read_sanitised_ftr_reg(SYS_ID_AA64PFR0_EL1); | |
28c5dcb2 | 1094 | u32 el3 = !!cpuid_feature_extract_unsigned_field(pfr, ID_AA64PFR0_EL3_SHIFT); |
bdfb4b38 | 1095 | |
2ec5be3d PF |
1096 | p->regval = ((((dfr >> ID_AA64DFR0_WRPS_SHIFT) & 0xf) << 28) | |
1097 | (((dfr >> ID_AA64DFR0_BRPS_SHIFT) & 0xf) << 24) | | |
1098 | (((dfr >> ID_AA64DFR0_CTX_CMPS_SHIFT) & 0xf) << 20) | |
1099 | | (6 << 16) | (el3 << 14) | (el3 << 12)); | |
bdfb4b38 MZ |
1100 | return true; |
1101 | } | |
1102 | } | |
1103 | ||
1104 | static bool trap_debug32(struct kvm_vcpu *vcpu, | |
3fec037d | 1105 | struct sys_reg_params *p, |
bdfb4b38 MZ |
1106 | const struct sys_reg_desc *r) |
1107 | { | |
1108 | if (p->is_write) { | |
2ec5be3d | 1109 | vcpu_cp14(vcpu, r->reg) = p->regval; |
bdfb4b38 MZ |
1110 | vcpu->arch.debug_flags |= KVM_ARM64_DEBUG_DIRTY; |
1111 | } else { | |
2ec5be3d | 1112 | p->regval = vcpu_cp14(vcpu, r->reg); |
bdfb4b38 MZ |
1113 | } |
1114 | ||
1115 | return true; | |
1116 | } | |
1117 | ||
84e690bf AB |
1118 | /* AArch32 debug register mappings |
1119 | * | |
1120 | * AArch32 DBGBVRn is mapped to DBGBVRn_EL1[31:0] | |
1121 | * AArch32 DBGBXVRn is mapped to DBGBVRn_EL1[63:32] | |
1122 | * | |
1123 | * All control registers and watchpoint value registers are mapped to | |
1124 | * the lower 32 bits of their AArch64 equivalents. We share the trap | |
1125 | * handlers with the above AArch64 code which checks what mode the | |
1126 | * system is in. | |
1127 | */ | |
1128 | ||
281243cb MZ |
1129 | static bool trap_xvr(struct kvm_vcpu *vcpu, |
1130 | struct sys_reg_params *p, | |
1131 | const struct sys_reg_desc *rd) | |
84e690bf AB |
1132 | { |
1133 | u64 *dbg_reg = &vcpu->arch.vcpu_debug_state.dbg_bvr[rd->reg]; | |
1134 | ||
1135 | if (p->is_write) { | |
1136 | u64 val = *dbg_reg; | |
1137 | ||
1138 | val &= 0xffffffffUL; | |
2ec5be3d | 1139 | val |= p->regval << 32; |
84e690bf AB |
1140 | *dbg_reg = val; |
1141 | ||
1142 | vcpu->arch.debug_flags |= KVM_ARM64_DEBUG_DIRTY; | |
1143 | } else { | |
2ec5be3d | 1144 | p->regval = *dbg_reg >> 32; |
84e690bf AB |
1145 | } |
1146 | ||
eef8c85a AB |
1147 | trace_trap_reg(__func__, rd->reg, p->is_write, *dbg_reg); |
1148 | ||
84e690bf AB |
1149 | return true; |
1150 | } | |
1151 | ||
1152 | #define DBG_BCR_BVR_WCR_WVR(n) \ | |
1153 | /* DBGBVRn */ \ | |
1154 | { Op1( 0), CRn( 0), CRm((n)), Op2( 4), trap_bvr, NULL, n }, \ | |
1155 | /* DBGBCRn */ \ | |
1156 | { Op1( 0), CRn( 0), CRm((n)), Op2( 5), trap_bcr, NULL, n }, \ | |
1157 | /* DBGWVRn */ \ | |
1158 | { Op1( 0), CRn( 0), CRm((n)), Op2( 6), trap_wvr, NULL, n }, \ | |
1159 | /* DBGWCRn */ \ | |
1160 | { Op1( 0), CRn( 0), CRm((n)), Op2( 7), trap_wcr, NULL, n } | |
1161 | ||
1162 | #define DBGBXVR(n) \ | |
1163 | { Op1( 0), CRn( 1), CRm((n)), Op2( 1), trap_xvr, NULL, n } | |
bdfb4b38 MZ |
1164 | |
1165 | /* | |
1166 | * Trapped cp14 registers. We generally ignore most of the external | |
1167 | * debug, on the principle that they don't really make sense to a | |
84e690bf | 1168 | * guest. Revisit this one day, would this principle change. |
bdfb4b38 | 1169 | */ |
72564016 | 1170 | static const struct sys_reg_desc cp14_regs[] = { |
bdfb4b38 MZ |
1171 | /* DBGIDR */ |
1172 | { Op1( 0), CRn( 0), CRm( 0), Op2( 0), trap_dbgidr }, | |
1173 | /* DBGDTRRXext */ | |
1174 | { Op1( 0), CRn( 0), CRm( 0), Op2( 2), trap_raz_wi }, | |
1175 | ||
1176 | DBG_BCR_BVR_WCR_WVR(0), | |
1177 | /* DBGDSCRint */ | |
1178 | { Op1( 0), CRn( 0), CRm( 1), Op2( 0), trap_raz_wi }, | |
1179 | DBG_BCR_BVR_WCR_WVR(1), | |
1180 | /* DBGDCCINT */ | |
1181 | { Op1( 0), CRn( 0), CRm( 2), Op2( 0), trap_debug32 }, | |
1182 | /* DBGDSCRext */ | |
1183 | { Op1( 0), CRn( 0), CRm( 2), Op2( 2), trap_debug32 }, | |
1184 | DBG_BCR_BVR_WCR_WVR(2), | |
1185 | /* DBGDTR[RT]Xint */ | |
1186 | { Op1( 0), CRn( 0), CRm( 3), Op2( 0), trap_raz_wi }, | |
1187 | /* DBGDTR[RT]Xext */ | |
1188 | { Op1( 0), CRn( 0), CRm( 3), Op2( 2), trap_raz_wi }, | |
1189 | DBG_BCR_BVR_WCR_WVR(3), | |
1190 | DBG_BCR_BVR_WCR_WVR(4), | |
1191 | DBG_BCR_BVR_WCR_WVR(5), | |
1192 | /* DBGWFAR */ | |
1193 | { Op1( 0), CRn( 0), CRm( 6), Op2( 0), trap_raz_wi }, | |
1194 | /* DBGOSECCR */ | |
1195 | { Op1( 0), CRn( 0), CRm( 6), Op2( 2), trap_raz_wi }, | |
1196 | DBG_BCR_BVR_WCR_WVR(6), | |
1197 | /* DBGVCR */ | |
1198 | { Op1( 0), CRn( 0), CRm( 7), Op2( 0), trap_debug32 }, | |
1199 | DBG_BCR_BVR_WCR_WVR(7), | |
1200 | DBG_BCR_BVR_WCR_WVR(8), | |
1201 | DBG_BCR_BVR_WCR_WVR(9), | |
1202 | DBG_BCR_BVR_WCR_WVR(10), | |
1203 | DBG_BCR_BVR_WCR_WVR(11), | |
1204 | DBG_BCR_BVR_WCR_WVR(12), | |
1205 | DBG_BCR_BVR_WCR_WVR(13), | |
1206 | DBG_BCR_BVR_WCR_WVR(14), | |
1207 | DBG_BCR_BVR_WCR_WVR(15), | |
1208 | ||
1209 | /* DBGDRAR (32bit) */ | |
1210 | { Op1( 0), CRn( 1), CRm( 0), Op2( 0), trap_raz_wi }, | |
1211 | ||
1212 | DBGBXVR(0), | |
1213 | /* DBGOSLAR */ | |
1214 | { Op1( 0), CRn( 1), CRm( 0), Op2( 4), trap_raz_wi }, | |
1215 | DBGBXVR(1), | |
1216 | /* DBGOSLSR */ | |
1217 | { Op1( 0), CRn( 1), CRm( 1), Op2( 4), trap_oslsr_el1 }, | |
1218 | DBGBXVR(2), | |
1219 | DBGBXVR(3), | |
1220 | /* DBGOSDLR */ | |
1221 | { Op1( 0), CRn( 1), CRm( 3), Op2( 4), trap_raz_wi }, | |
1222 | DBGBXVR(4), | |
1223 | /* DBGPRCR */ | |
1224 | { Op1( 0), CRn( 1), CRm( 4), Op2( 4), trap_raz_wi }, | |
1225 | DBGBXVR(5), | |
1226 | DBGBXVR(6), | |
1227 | DBGBXVR(7), | |
1228 | DBGBXVR(8), | |
1229 | DBGBXVR(9), | |
1230 | DBGBXVR(10), | |
1231 | DBGBXVR(11), | |
1232 | DBGBXVR(12), | |
1233 | DBGBXVR(13), | |
1234 | DBGBXVR(14), | |
1235 | DBGBXVR(15), | |
1236 | ||
1237 | /* DBGDSAR (32bit) */ | |
1238 | { Op1( 0), CRn( 2), CRm( 0), Op2( 0), trap_raz_wi }, | |
1239 | ||
1240 | /* DBGDEVID2 */ | |
1241 | { Op1( 0), CRn( 7), CRm( 0), Op2( 7), trap_raz_wi }, | |
1242 | /* DBGDEVID1 */ | |
1243 | { Op1( 0), CRn( 7), CRm( 1), Op2( 7), trap_raz_wi }, | |
1244 | /* DBGDEVID */ | |
1245 | { Op1( 0), CRn( 7), CRm( 2), Op2( 7), trap_raz_wi }, | |
1246 | /* DBGCLAIMSET */ | |
1247 | { Op1( 0), CRn( 7), CRm( 8), Op2( 6), trap_raz_wi }, | |
1248 | /* DBGCLAIMCLR */ | |
1249 | { Op1( 0), CRn( 7), CRm( 9), Op2( 6), trap_raz_wi }, | |
1250 | /* DBGAUTHSTATUS */ | |
1251 | { Op1( 0), CRn( 7), CRm(14), Op2( 6), trap_dbgauthstatus_el1 }, | |
72564016 MZ |
1252 | }; |
1253 | ||
a9866ba0 MZ |
1254 | /* Trapped cp14 64bit registers */ |
1255 | static const struct sys_reg_desc cp14_64_regs[] = { | |
bdfb4b38 MZ |
1256 | /* DBGDRAR (64bit) */ |
1257 | { Op1( 0), CRm( 1), .access = trap_raz_wi }, | |
1258 | ||
1259 | /* DBGDSAR (64bit) */ | |
1260 | { Op1( 0), CRm( 2), .access = trap_raz_wi }, | |
a9866ba0 MZ |
1261 | }; |
1262 | ||
051ff581 SZ |
1263 | /* Macro to expand the PMEVCNTRn register */ |
1264 | #define PMU_PMEVCNTR(n) \ | |
1265 | /* PMEVCNTRn */ \ | |
1266 | { Op1(0), CRn(0b1110), \ | |
1267 | CRm((0b1000 | (((n) >> 3) & 0x3))), Op2(((n) & 0x7)), \ | |
1268 | access_pmu_evcntr } | |
1269 | ||
9feb21ac SZ |
1270 | /* Macro to expand the PMEVTYPERn register */ |
1271 | #define PMU_PMEVTYPER(n) \ | |
1272 | /* PMEVTYPERn */ \ | |
1273 | { Op1(0), CRn(0b1110), \ | |
1274 | CRm((0b1100 | (((n) >> 3) & 0x3))), Op2(((n) & 0x7)), \ | |
1275 | access_pmu_evtyper } | |
1276 | ||
4d44923b MZ |
1277 | /* |
1278 | * Trapped cp15 registers. TTBR0/TTBR1 get a double encoding, | |
1279 | * depending on the way they are accessed (as a 32bit or a 64bit | |
1280 | * register). | |
1281 | */ | |
62a89c44 | 1282 | static const struct sys_reg_desc cp15_regs[] = { |
6d52f35a AP |
1283 | { Op1( 0), CRn( 0), CRm(12), Op2( 0), access_gic_sgi }, |
1284 | ||
3c1e7165 | 1285 | { Op1( 0), CRn( 1), CRm( 0), Op2( 0), access_vm_reg, NULL, c1_SCTLR }, |
4d44923b MZ |
1286 | { Op1( 0), CRn( 2), CRm( 0), Op2( 0), access_vm_reg, NULL, c2_TTBR0 }, |
1287 | { Op1( 0), CRn( 2), CRm( 0), Op2( 1), access_vm_reg, NULL, c2_TTBR1 }, | |
1288 | { Op1( 0), CRn( 2), CRm( 0), Op2( 2), access_vm_reg, NULL, c2_TTBCR }, | |
1289 | { Op1( 0), CRn( 3), CRm( 0), Op2( 0), access_vm_reg, NULL, c3_DACR }, | |
1290 | { Op1( 0), CRn( 5), CRm( 0), Op2( 0), access_vm_reg, NULL, c5_DFSR }, | |
1291 | { Op1( 0), CRn( 5), CRm( 0), Op2( 1), access_vm_reg, NULL, c5_IFSR }, | |
1292 | { Op1( 0), CRn( 5), CRm( 1), Op2( 0), access_vm_reg, NULL, c5_ADFSR }, | |
1293 | { Op1( 0), CRn( 5), CRm( 1), Op2( 1), access_vm_reg, NULL, c5_AIFSR }, | |
1294 | { Op1( 0), CRn( 6), CRm( 0), Op2( 0), access_vm_reg, NULL, c6_DFAR }, | |
1295 | { Op1( 0), CRn( 6), CRm( 0), Op2( 2), access_vm_reg, NULL, c6_IFAR }, | |
1296 | ||
62a89c44 MZ |
1297 | /* |
1298 | * DC{C,I,CI}SW operations: | |
1299 | */ | |
1300 | { Op1( 0), CRn( 7), CRm( 6), Op2( 2), access_dcsw }, | |
1301 | { Op1( 0), CRn( 7), CRm(10), Op2( 2), access_dcsw }, | |
1302 | { Op1( 0), CRn( 7), CRm(14), Op2( 2), access_dcsw }, | |
4d44923b | 1303 | |
7609c125 | 1304 | /* PMU */ |
ab946834 | 1305 | { Op1( 0), CRn( 9), CRm(12), Op2( 0), access_pmcr }, |
96b0eebc SZ |
1306 | { Op1( 0), CRn( 9), CRm(12), Op2( 1), access_pmcnten }, |
1307 | { Op1( 0), CRn( 9), CRm(12), Op2( 2), access_pmcnten }, | |
76d883c4 | 1308 | { Op1( 0), CRn( 9), CRm(12), Op2( 3), access_pmovs }, |
7a0adc70 | 1309 | { Op1( 0), CRn( 9), CRm(12), Op2( 4), access_pmswinc }, |
3965c3ce | 1310 | { Op1( 0), CRn( 9), CRm(12), Op2( 5), access_pmselr }, |
a86b5505 SZ |
1311 | { Op1( 0), CRn( 9), CRm(12), Op2( 6), access_pmceid }, |
1312 | { Op1( 0), CRn( 9), CRm(12), Op2( 7), access_pmceid }, | |
051ff581 | 1313 | { Op1( 0), CRn( 9), CRm(13), Op2( 0), access_pmu_evcntr }, |
9feb21ac | 1314 | { Op1( 0), CRn( 9), CRm(13), Op2( 1), access_pmu_evtyper }, |
051ff581 | 1315 | { Op1( 0), CRn( 9), CRm(13), Op2( 2), access_pmu_evcntr }, |
d692b8ad | 1316 | { Op1( 0), CRn( 9), CRm(14), Op2( 0), access_pmuserenr }, |
9db52c78 SZ |
1317 | { Op1( 0), CRn( 9), CRm(14), Op2( 1), access_pminten }, |
1318 | { Op1( 0), CRn( 9), CRm(14), Op2( 2), access_pminten }, | |
76d883c4 | 1319 | { Op1( 0), CRn( 9), CRm(14), Op2( 3), access_pmovs }, |
4d44923b MZ |
1320 | |
1321 | { Op1( 0), CRn(10), CRm( 2), Op2( 0), access_vm_reg, NULL, c10_PRRR }, | |
1322 | { Op1( 0), CRn(10), CRm( 2), Op2( 1), access_vm_reg, NULL, c10_NMRR }, | |
1323 | { Op1( 0), CRn(10), CRm( 3), Op2( 0), access_vm_reg, NULL, c10_AMAIR0 }, | |
1324 | { Op1( 0), CRn(10), CRm( 3), Op2( 1), access_vm_reg, NULL, c10_AMAIR1 }, | |
db7dedd0 CD |
1325 | |
1326 | /* ICC_SRE */ | |
f7f6f2d9 | 1327 | { Op1( 0), CRn(12), CRm(12), Op2( 5), access_gic_sre }, |
db7dedd0 | 1328 | |
4d44923b | 1329 | { Op1( 0), CRn(13), CRm( 0), Op2( 1), access_vm_reg, NULL, c13_CID }, |
051ff581 SZ |
1330 | |
1331 | /* PMEVCNTRn */ | |
1332 | PMU_PMEVCNTR(0), | |
1333 | PMU_PMEVCNTR(1), | |
1334 | PMU_PMEVCNTR(2), | |
1335 | PMU_PMEVCNTR(3), | |
1336 | PMU_PMEVCNTR(4), | |
1337 | PMU_PMEVCNTR(5), | |
1338 | PMU_PMEVCNTR(6), | |
1339 | PMU_PMEVCNTR(7), | |
1340 | PMU_PMEVCNTR(8), | |
1341 | PMU_PMEVCNTR(9), | |
1342 | PMU_PMEVCNTR(10), | |
1343 | PMU_PMEVCNTR(11), | |
1344 | PMU_PMEVCNTR(12), | |
1345 | PMU_PMEVCNTR(13), | |
1346 | PMU_PMEVCNTR(14), | |
1347 | PMU_PMEVCNTR(15), | |
1348 | PMU_PMEVCNTR(16), | |
1349 | PMU_PMEVCNTR(17), | |
1350 | PMU_PMEVCNTR(18), | |
1351 | PMU_PMEVCNTR(19), | |
1352 | PMU_PMEVCNTR(20), | |
1353 | PMU_PMEVCNTR(21), | |
1354 | PMU_PMEVCNTR(22), | |
1355 | PMU_PMEVCNTR(23), | |
1356 | PMU_PMEVCNTR(24), | |
1357 | PMU_PMEVCNTR(25), | |
1358 | PMU_PMEVCNTR(26), | |
1359 | PMU_PMEVCNTR(27), | |
1360 | PMU_PMEVCNTR(28), | |
1361 | PMU_PMEVCNTR(29), | |
1362 | PMU_PMEVCNTR(30), | |
9feb21ac SZ |
1363 | /* PMEVTYPERn */ |
1364 | PMU_PMEVTYPER(0), | |
1365 | PMU_PMEVTYPER(1), | |
1366 | PMU_PMEVTYPER(2), | |
1367 | PMU_PMEVTYPER(3), | |
1368 | PMU_PMEVTYPER(4), | |
1369 | PMU_PMEVTYPER(5), | |
1370 | PMU_PMEVTYPER(6), | |
1371 | PMU_PMEVTYPER(7), | |
1372 | PMU_PMEVTYPER(8), | |
1373 | PMU_PMEVTYPER(9), | |
1374 | PMU_PMEVTYPER(10), | |
1375 | PMU_PMEVTYPER(11), | |
1376 | PMU_PMEVTYPER(12), | |
1377 | PMU_PMEVTYPER(13), | |
1378 | PMU_PMEVTYPER(14), | |
1379 | PMU_PMEVTYPER(15), | |
1380 | PMU_PMEVTYPER(16), | |
1381 | PMU_PMEVTYPER(17), | |
1382 | PMU_PMEVTYPER(18), | |
1383 | PMU_PMEVTYPER(19), | |
1384 | PMU_PMEVTYPER(20), | |
1385 | PMU_PMEVTYPER(21), | |
1386 | PMU_PMEVTYPER(22), | |
1387 | PMU_PMEVTYPER(23), | |
1388 | PMU_PMEVTYPER(24), | |
1389 | PMU_PMEVTYPER(25), | |
1390 | PMU_PMEVTYPER(26), | |
1391 | PMU_PMEVTYPER(27), | |
1392 | PMU_PMEVTYPER(28), | |
1393 | PMU_PMEVTYPER(29), | |
1394 | PMU_PMEVTYPER(30), | |
1395 | /* PMCCFILTR */ | |
1396 | { Op1(0), CRn(14), CRm(15), Op2(7), access_pmu_evtyper }, | |
a9866ba0 MZ |
1397 | }; |
1398 | ||
1399 | static const struct sys_reg_desc cp15_64_regs[] = { | |
1400 | { Op1( 0), CRn( 0), CRm( 2), Op2( 0), access_vm_reg, NULL, c2_TTBR0 }, | |
051ff581 | 1401 | { Op1( 0), CRn( 0), CRm( 9), Op2( 0), access_pmu_evcntr }, |
6d52f35a | 1402 | { Op1( 0), CRn( 0), CRm(12), Op2( 0), access_gic_sgi }, |
4d44923b | 1403 | { Op1( 1), CRn( 0), CRm( 2), Op2( 0), access_vm_reg, NULL, c2_TTBR1 }, |
7c8c5e6a MZ |
1404 | }; |
1405 | ||
1406 | /* Target specific emulation tables */ | |
1407 | static struct kvm_sys_reg_target_table *target_tables[KVM_ARM_NUM_TARGETS]; | |
1408 | ||
1409 | void kvm_register_target_sys_reg_table(unsigned int target, | |
1410 | struct kvm_sys_reg_target_table *table) | |
1411 | { | |
1412 | target_tables[target] = table; | |
1413 | } | |
1414 | ||
1415 | /* Get specific register table for this target. */ | |
62a89c44 MZ |
1416 | static const struct sys_reg_desc *get_target_table(unsigned target, |
1417 | bool mode_is_64, | |
1418 | size_t *num) | |
7c8c5e6a MZ |
1419 | { |
1420 | struct kvm_sys_reg_target_table *table; | |
1421 | ||
1422 | table = target_tables[target]; | |
62a89c44 MZ |
1423 | if (mode_is_64) { |
1424 | *num = table->table64.num; | |
1425 | return table->table64.table; | |
1426 | } else { | |
1427 | *num = table->table32.num; | |
1428 | return table->table32.table; | |
1429 | } | |
7c8c5e6a MZ |
1430 | } |
1431 | ||
623eefa8 MZ |
1432 | #define reg_to_match_value(x) \ |
1433 | ({ \ | |
1434 | unsigned long val; \ | |
1435 | val = (x)->Op0 << 14; \ | |
1436 | val |= (x)->Op1 << 11; \ | |
1437 | val |= (x)->CRn << 7; \ | |
1438 | val |= (x)->CRm << 3; \ | |
1439 | val |= (x)->Op2; \ | |
1440 | val; \ | |
1441 | }) | |
1442 | ||
1443 | static int match_sys_reg(const void *key, const void *elt) | |
1444 | { | |
1445 | const unsigned long pval = (unsigned long)key; | |
1446 | const struct sys_reg_desc *r = elt; | |
1447 | ||
1448 | return pval - reg_to_match_value(r); | |
1449 | } | |
1450 | ||
7c8c5e6a MZ |
1451 | static const struct sys_reg_desc *find_reg(const struct sys_reg_params *params, |
1452 | const struct sys_reg_desc table[], | |
1453 | unsigned int num) | |
1454 | { | |
623eefa8 MZ |
1455 | unsigned long pval = reg_to_match_value(params); |
1456 | ||
1457 | return bsearch((void *)pval, table, num, sizeof(table[0]), match_sys_reg); | |
7c8c5e6a MZ |
1458 | } |
1459 | ||
62a89c44 MZ |
1460 | int kvm_handle_cp14_load_store(struct kvm_vcpu *vcpu, struct kvm_run *run) |
1461 | { | |
1462 | kvm_inject_undefined(vcpu); | |
1463 | return 1; | |
1464 | } | |
1465 | ||
e70b9522 MZ |
1466 | static void perform_access(struct kvm_vcpu *vcpu, |
1467 | struct sys_reg_params *params, | |
1468 | const struct sys_reg_desc *r) | |
1469 | { | |
1470 | /* | |
1471 | * Not having an accessor means that we have configured a trap | |
1472 | * that we don't know how to handle. This certainly qualifies | |
1473 | * as a gross bug that should be fixed right away. | |
1474 | */ | |
1475 | BUG_ON(!r->access); | |
1476 | ||
1477 | /* Skip instruction if instructed so */ | |
1478 | if (likely(r->access(vcpu, params, r))) | |
1479 | kvm_skip_instr(vcpu, kvm_vcpu_trap_il_is32bit(vcpu)); | |
1480 | } | |
1481 | ||
72564016 MZ |
1482 | /* |
1483 | * emulate_cp -- tries to match a sys_reg access in a handling table, and | |
1484 | * call the corresponding trap handler. | |
1485 | * | |
1486 | * @params: pointer to the descriptor of the access | |
1487 | * @table: array of trap descriptors | |
1488 | * @num: size of the trap descriptor array | |
1489 | * | |
1490 | * Return 0 if the access has been handled, and -1 if not. | |
1491 | */ | |
1492 | static int emulate_cp(struct kvm_vcpu *vcpu, | |
3fec037d | 1493 | struct sys_reg_params *params, |
72564016 MZ |
1494 | const struct sys_reg_desc *table, |
1495 | size_t num) | |
62a89c44 | 1496 | { |
72564016 | 1497 | const struct sys_reg_desc *r; |
62a89c44 | 1498 | |
72564016 MZ |
1499 | if (!table) |
1500 | return -1; /* Not handled */ | |
62a89c44 | 1501 | |
62a89c44 | 1502 | r = find_reg(params, table, num); |
62a89c44 | 1503 | |
72564016 | 1504 | if (r) { |
e70b9522 MZ |
1505 | perform_access(vcpu, params, r); |
1506 | return 0; | |
72564016 MZ |
1507 | } |
1508 | ||
1509 | /* Not handled */ | |
1510 | return -1; | |
1511 | } | |
1512 | ||
1513 | static void unhandled_cp_access(struct kvm_vcpu *vcpu, | |
1514 | struct sys_reg_params *params) | |
1515 | { | |
1516 | u8 hsr_ec = kvm_vcpu_trap_get_class(vcpu); | |
40c4f8d2 | 1517 | int cp = -1; |
72564016 MZ |
1518 | |
1519 | switch(hsr_ec) { | |
c6d01a94 MR |
1520 | case ESR_ELx_EC_CP15_32: |
1521 | case ESR_ELx_EC_CP15_64: | |
72564016 MZ |
1522 | cp = 15; |
1523 | break; | |
c6d01a94 MR |
1524 | case ESR_ELx_EC_CP14_MR: |
1525 | case ESR_ELx_EC_CP14_64: | |
72564016 MZ |
1526 | cp = 14; |
1527 | break; | |
1528 | default: | |
40c4f8d2 | 1529 | WARN_ON(1); |
62a89c44 MZ |
1530 | } |
1531 | ||
72564016 MZ |
1532 | kvm_err("Unsupported guest CP%d access at: %08lx\n", |
1533 | cp, *vcpu_pc(vcpu)); | |
62a89c44 MZ |
1534 | print_sys_reg_instr(params); |
1535 | kvm_inject_undefined(vcpu); | |
1536 | } | |
1537 | ||
1538 | /** | |
7769db90 | 1539 | * kvm_handle_cp_64 -- handles a mrrc/mcrr trap on a guest CP14/CP15 access |
62a89c44 MZ |
1540 | * @vcpu: The VCPU pointer |
1541 | * @run: The kvm_run struct | |
1542 | */ | |
72564016 MZ |
1543 | static int kvm_handle_cp_64(struct kvm_vcpu *vcpu, |
1544 | const struct sys_reg_desc *global, | |
1545 | size_t nr_global, | |
1546 | const struct sys_reg_desc *target_specific, | |
1547 | size_t nr_specific) | |
62a89c44 MZ |
1548 | { |
1549 | struct sys_reg_params params; | |
1550 | u32 hsr = kvm_vcpu_get_hsr(vcpu); | |
c667186f MZ |
1551 | int Rt = kvm_vcpu_sys_get_rt(vcpu); |
1552 | int Rt2 = (hsr >> 10) & 0x1f; | |
62a89c44 | 1553 | |
2072d29c MZ |
1554 | params.is_aarch32 = true; |
1555 | params.is_32bit = false; | |
62a89c44 | 1556 | params.CRm = (hsr >> 1) & 0xf; |
62a89c44 MZ |
1557 | params.is_write = ((hsr & 1) == 0); |
1558 | ||
1559 | params.Op0 = 0; | |
1560 | params.Op1 = (hsr >> 16) & 0xf; | |
1561 | params.Op2 = 0; | |
1562 | params.CRn = 0; | |
1563 | ||
1564 | /* | |
2ec5be3d | 1565 | * Make a 64-bit value out of Rt and Rt2. As we use the same trap |
62a89c44 MZ |
1566 | * backends between AArch32 and AArch64, we get away with it. |
1567 | */ | |
1568 | if (params.is_write) { | |
2ec5be3d PF |
1569 | params.regval = vcpu_get_reg(vcpu, Rt) & 0xffffffff; |
1570 | params.regval |= vcpu_get_reg(vcpu, Rt2) << 32; | |
62a89c44 MZ |
1571 | } |
1572 | ||
b6b7a806 MZ |
1573 | /* |
1574 | * Try to emulate the coprocessor access using the target | |
1575 | * specific table first, and using the global table afterwards. | |
1576 | * If either of the tables contains a handler, handle the | |
1577 | * potential register operation in the case of a read and return | |
1578 | * with success. | |
1579 | */ | |
1580 | if (!emulate_cp(vcpu, ¶ms, target_specific, nr_specific) || | |
1581 | !emulate_cp(vcpu, ¶ms, global, nr_global)) { | |
1582 | /* Split up the value between registers for the read side */ | |
1583 | if (!params.is_write) { | |
1584 | vcpu_set_reg(vcpu, Rt, lower_32_bits(params.regval)); | |
1585 | vcpu_set_reg(vcpu, Rt2, upper_32_bits(params.regval)); | |
1586 | } | |
62a89c44 | 1587 | |
b6b7a806 | 1588 | return 1; |
62a89c44 MZ |
1589 | } |
1590 | ||
b6b7a806 | 1591 | unhandled_cp_access(vcpu, ¶ms); |
62a89c44 MZ |
1592 | return 1; |
1593 | } | |
1594 | ||
1595 | /** | |
7769db90 | 1596 | * kvm_handle_cp_32 -- handles a mrc/mcr trap on a guest CP14/CP15 access |
62a89c44 MZ |
1597 | * @vcpu: The VCPU pointer |
1598 | * @run: The kvm_run struct | |
1599 | */ | |
72564016 MZ |
1600 | static int kvm_handle_cp_32(struct kvm_vcpu *vcpu, |
1601 | const struct sys_reg_desc *global, | |
1602 | size_t nr_global, | |
1603 | const struct sys_reg_desc *target_specific, | |
1604 | size_t nr_specific) | |
62a89c44 MZ |
1605 | { |
1606 | struct sys_reg_params params; | |
1607 | u32 hsr = kvm_vcpu_get_hsr(vcpu); | |
c667186f | 1608 | int Rt = kvm_vcpu_sys_get_rt(vcpu); |
62a89c44 | 1609 | |
2072d29c MZ |
1610 | params.is_aarch32 = true; |
1611 | params.is_32bit = true; | |
62a89c44 | 1612 | params.CRm = (hsr >> 1) & 0xf; |
2ec5be3d | 1613 | params.regval = vcpu_get_reg(vcpu, Rt); |
62a89c44 MZ |
1614 | params.is_write = ((hsr & 1) == 0); |
1615 | params.CRn = (hsr >> 10) & 0xf; | |
1616 | params.Op0 = 0; | |
1617 | params.Op1 = (hsr >> 14) & 0x7; | |
1618 | params.Op2 = (hsr >> 17) & 0x7; | |
1619 | ||
2ec5be3d PF |
1620 | if (!emulate_cp(vcpu, ¶ms, target_specific, nr_specific) || |
1621 | !emulate_cp(vcpu, ¶ms, global, nr_global)) { | |
1622 | if (!params.is_write) | |
1623 | vcpu_set_reg(vcpu, Rt, params.regval); | |
72564016 | 1624 | return 1; |
2ec5be3d | 1625 | } |
72564016 MZ |
1626 | |
1627 | unhandled_cp_access(vcpu, ¶ms); | |
62a89c44 MZ |
1628 | return 1; |
1629 | } | |
1630 | ||
72564016 MZ |
1631 | int kvm_handle_cp15_64(struct kvm_vcpu *vcpu, struct kvm_run *run) |
1632 | { | |
1633 | const struct sys_reg_desc *target_specific; | |
1634 | size_t num; | |
1635 | ||
1636 | target_specific = get_target_table(vcpu->arch.target, false, &num); | |
1637 | return kvm_handle_cp_64(vcpu, | |
a9866ba0 | 1638 | cp15_64_regs, ARRAY_SIZE(cp15_64_regs), |
72564016 MZ |
1639 | target_specific, num); |
1640 | } | |
1641 | ||
1642 | int kvm_handle_cp15_32(struct kvm_vcpu *vcpu, struct kvm_run *run) | |
1643 | { | |
1644 | const struct sys_reg_desc *target_specific; | |
1645 | size_t num; | |
1646 | ||
1647 | target_specific = get_target_table(vcpu->arch.target, false, &num); | |
1648 | return kvm_handle_cp_32(vcpu, | |
1649 | cp15_regs, ARRAY_SIZE(cp15_regs), | |
1650 | target_specific, num); | |
1651 | } | |
1652 | ||
1653 | int kvm_handle_cp14_64(struct kvm_vcpu *vcpu, struct kvm_run *run) | |
1654 | { | |
1655 | return kvm_handle_cp_64(vcpu, | |
a9866ba0 | 1656 | cp14_64_regs, ARRAY_SIZE(cp14_64_regs), |
72564016 MZ |
1657 | NULL, 0); |
1658 | } | |
1659 | ||
1660 | int kvm_handle_cp14_32(struct kvm_vcpu *vcpu, struct kvm_run *run) | |
1661 | { | |
1662 | return kvm_handle_cp_32(vcpu, | |
1663 | cp14_regs, ARRAY_SIZE(cp14_regs), | |
1664 | NULL, 0); | |
1665 | } | |
1666 | ||
7c8c5e6a | 1667 | static int emulate_sys_reg(struct kvm_vcpu *vcpu, |
3fec037d | 1668 | struct sys_reg_params *params) |
7c8c5e6a MZ |
1669 | { |
1670 | size_t num; | |
1671 | const struct sys_reg_desc *table, *r; | |
1672 | ||
62a89c44 | 1673 | table = get_target_table(vcpu->arch.target, true, &num); |
7c8c5e6a MZ |
1674 | |
1675 | /* Search target-specific then generic table. */ | |
1676 | r = find_reg(params, table, num); | |
1677 | if (!r) | |
1678 | r = find_reg(params, sys_reg_descs, ARRAY_SIZE(sys_reg_descs)); | |
1679 | ||
1680 | if (likely(r)) { | |
e70b9522 | 1681 | perform_access(vcpu, params, r); |
7c8c5e6a MZ |
1682 | } else { |
1683 | kvm_err("Unsupported guest sys_reg access at: %lx\n", | |
1684 | *vcpu_pc(vcpu)); | |
1685 | print_sys_reg_instr(params); | |
e70b9522 | 1686 | kvm_inject_undefined(vcpu); |
7c8c5e6a | 1687 | } |
7c8c5e6a MZ |
1688 | return 1; |
1689 | } | |
1690 | ||
1691 | static void reset_sys_reg_descs(struct kvm_vcpu *vcpu, | |
1692 | const struct sys_reg_desc *table, size_t num) | |
1693 | { | |
1694 | unsigned long i; | |
1695 | ||
1696 | for (i = 0; i < num; i++) | |
1697 | if (table[i].reset) | |
1698 | table[i].reset(vcpu, &table[i]); | |
1699 | } | |
1700 | ||
1701 | /** | |
1702 | * kvm_handle_sys_reg -- handles a mrs/msr trap on a guest sys_reg access | |
1703 | * @vcpu: The VCPU pointer | |
1704 | * @run: The kvm_run struct | |
1705 | */ | |
1706 | int kvm_handle_sys_reg(struct kvm_vcpu *vcpu, struct kvm_run *run) | |
1707 | { | |
1708 | struct sys_reg_params params; | |
1709 | unsigned long esr = kvm_vcpu_get_hsr(vcpu); | |
c667186f | 1710 | int Rt = kvm_vcpu_sys_get_rt(vcpu); |
2ec5be3d | 1711 | int ret; |
7c8c5e6a | 1712 | |
eef8c85a AB |
1713 | trace_kvm_handle_sys_reg(esr); |
1714 | ||
2072d29c MZ |
1715 | params.is_aarch32 = false; |
1716 | params.is_32bit = false; | |
7c8c5e6a MZ |
1717 | params.Op0 = (esr >> 20) & 3; |
1718 | params.Op1 = (esr >> 14) & 0x7; | |
1719 | params.CRn = (esr >> 10) & 0xf; | |
1720 | params.CRm = (esr >> 1) & 0xf; | |
1721 | params.Op2 = (esr >> 17) & 0x7; | |
2ec5be3d | 1722 | params.regval = vcpu_get_reg(vcpu, Rt); |
7c8c5e6a MZ |
1723 | params.is_write = !(esr & 1); |
1724 | ||
2ec5be3d PF |
1725 | ret = emulate_sys_reg(vcpu, ¶ms); |
1726 | ||
1727 | if (!params.is_write) | |
1728 | vcpu_set_reg(vcpu, Rt, params.regval); | |
1729 | return ret; | |
7c8c5e6a MZ |
1730 | } |
1731 | ||
1732 | /****************************************************************************** | |
1733 | * Userspace API | |
1734 | *****************************************************************************/ | |
1735 | ||
1736 | static bool index_to_params(u64 id, struct sys_reg_params *params) | |
1737 | { | |
1738 | switch (id & KVM_REG_SIZE_MASK) { | |
1739 | case KVM_REG_SIZE_U64: | |
1740 | /* Any unused index bits means it's not valid. */ | |
1741 | if (id & ~(KVM_REG_ARCH_MASK | KVM_REG_SIZE_MASK | |
1742 | | KVM_REG_ARM_COPROC_MASK | |
1743 | | KVM_REG_ARM64_SYSREG_OP0_MASK | |
1744 | | KVM_REG_ARM64_SYSREG_OP1_MASK | |
1745 | | KVM_REG_ARM64_SYSREG_CRN_MASK | |
1746 | | KVM_REG_ARM64_SYSREG_CRM_MASK | |
1747 | | KVM_REG_ARM64_SYSREG_OP2_MASK)) | |
1748 | return false; | |
1749 | params->Op0 = ((id & KVM_REG_ARM64_SYSREG_OP0_MASK) | |
1750 | >> KVM_REG_ARM64_SYSREG_OP0_SHIFT); | |
1751 | params->Op1 = ((id & KVM_REG_ARM64_SYSREG_OP1_MASK) | |
1752 | >> KVM_REG_ARM64_SYSREG_OP1_SHIFT); | |
1753 | params->CRn = ((id & KVM_REG_ARM64_SYSREG_CRN_MASK) | |
1754 | >> KVM_REG_ARM64_SYSREG_CRN_SHIFT); | |
1755 | params->CRm = ((id & KVM_REG_ARM64_SYSREG_CRM_MASK) | |
1756 | >> KVM_REG_ARM64_SYSREG_CRM_SHIFT); | |
1757 | params->Op2 = ((id & KVM_REG_ARM64_SYSREG_OP2_MASK) | |
1758 | >> KVM_REG_ARM64_SYSREG_OP2_SHIFT); | |
1759 | return true; | |
1760 | default: | |
1761 | return false; | |
1762 | } | |
1763 | } | |
1764 | ||
4b927b94 VK |
1765 | const struct sys_reg_desc *find_reg_by_id(u64 id, |
1766 | struct sys_reg_params *params, | |
1767 | const struct sys_reg_desc table[], | |
1768 | unsigned int num) | |
1769 | { | |
1770 | if (!index_to_params(id, params)) | |
1771 | return NULL; | |
1772 | ||
1773 | return find_reg(params, table, num); | |
1774 | } | |
1775 | ||
7c8c5e6a MZ |
1776 | /* Decode an index value, and find the sys_reg_desc entry. */ |
1777 | static const struct sys_reg_desc *index_to_sys_reg_desc(struct kvm_vcpu *vcpu, | |
1778 | u64 id) | |
1779 | { | |
1780 | size_t num; | |
1781 | const struct sys_reg_desc *table, *r; | |
1782 | struct sys_reg_params params; | |
1783 | ||
1784 | /* We only do sys_reg for now. */ | |
1785 | if ((id & KVM_REG_ARM_COPROC_MASK) != KVM_REG_ARM64_SYSREG) | |
1786 | return NULL; | |
1787 | ||
62a89c44 | 1788 | table = get_target_table(vcpu->arch.target, true, &num); |
4b927b94 | 1789 | r = find_reg_by_id(id, ¶ms, table, num); |
7c8c5e6a MZ |
1790 | if (!r) |
1791 | r = find_reg(¶ms, sys_reg_descs, ARRAY_SIZE(sys_reg_descs)); | |
1792 | ||
1793 | /* Not saved in the sys_reg array? */ | |
1794 | if (r && !r->reg) | |
1795 | r = NULL; | |
1796 | ||
1797 | return r; | |
1798 | } | |
1799 | ||
1800 | /* | |
1801 | * These are the invariant sys_reg registers: we let the guest see the | |
1802 | * host versions of these, so they're part of the guest state. | |
1803 | * | |
1804 | * A future CPU may provide a mechanism to present different values to | |
1805 | * the guest, or a future kvm may trap them. | |
1806 | */ | |
1807 | ||
1808 | #define FUNCTION_INVARIANT(reg) \ | |
1809 | static void get_##reg(struct kvm_vcpu *v, \ | |
1810 | const struct sys_reg_desc *r) \ | |
1811 | { \ | |
1f3d8699 | 1812 | ((struct sys_reg_desc *)r)->val = read_sysreg(reg); \ |
7c8c5e6a MZ |
1813 | } |
1814 | ||
1815 | FUNCTION_INVARIANT(midr_el1) | |
1816 | FUNCTION_INVARIANT(ctr_el0) | |
1817 | FUNCTION_INVARIANT(revidr_el1) | |
1818 | FUNCTION_INVARIANT(id_pfr0_el1) | |
1819 | FUNCTION_INVARIANT(id_pfr1_el1) | |
1820 | FUNCTION_INVARIANT(id_dfr0_el1) | |
1821 | FUNCTION_INVARIANT(id_afr0_el1) | |
1822 | FUNCTION_INVARIANT(id_mmfr0_el1) | |
1823 | FUNCTION_INVARIANT(id_mmfr1_el1) | |
1824 | FUNCTION_INVARIANT(id_mmfr2_el1) | |
1825 | FUNCTION_INVARIANT(id_mmfr3_el1) | |
1826 | FUNCTION_INVARIANT(id_isar0_el1) | |
1827 | FUNCTION_INVARIANT(id_isar1_el1) | |
1828 | FUNCTION_INVARIANT(id_isar2_el1) | |
1829 | FUNCTION_INVARIANT(id_isar3_el1) | |
1830 | FUNCTION_INVARIANT(id_isar4_el1) | |
1831 | FUNCTION_INVARIANT(id_isar5_el1) | |
1832 | FUNCTION_INVARIANT(clidr_el1) | |
1833 | FUNCTION_INVARIANT(aidr_el1) | |
1834 | ||
1835 | /* ->val is filled in by kvm_sys_reg_table_init() */ | |
1836 | static struct sys_reg_desc invariant_sys_regs[] = { | |
0d449541 MR |
1837 | { SYS_DESC(SYS_MIDR_EL1), NULL, get_midr_el1 }, |
1838 | { SYS_DESC(SYS_REVIDR_EL1), NULL, get_revidr_el1 }, | |
1839 | { SYS_DESC(SYS_ID_PFR0_EL1), NULL, get_id_pfr0_el1 }, | |
1840 | { SYS_DESC(SYS_ID_PFR1_EL1), NULL, get_id_pfr1_el1 }, | |
1841 | { SYS_DESC(SYS_ID_DFR0_EL1), NULL, get_id_dfr0_el1 }, | |
1842 | { SYS_DESC(SYS_ID_AFR0_EL1), NULL, get_id_afr0_el1 }, | |
1843 | { SYS_DESC(SYS_ID_MMFR0_EL1), NULL, get_id_mmfr0_el1 }, | |
1844 | { SYS_DESC(SYS_ID_MMFR1_EL1), NULL, get_id_mmfr1_el1 }, | |
1845 | { SYS_DESC(SYS_ID_MMFR2_EL1), NULL, get_id_mmfr2_el1 }, | |
1846 | { SYS_DESC(SYS_ID_MMFR3_EL1), NULL, get_id_mmfr3_el1 }, | |
1847 | { SYS_DESC(SYS_ID_ISAR0_EL1), NULL, get_id_isar0_el1 }, | |
1848 | { SYS_DESC(SYS_ID_ISAR1_EL1), NULL, get_id_isar1_el1 }, | |
1849 | { SYS_DESC(SYS_ID_ISAR2_EL1), NULL, get_id_isar2_el1 }, | |
1850 | { SYS_DESC(SYS_ID_ISAR3_EL1), NULL, get_id_isar3_el1 }, | |
1851 | { SYS_DESC(SYS_ID_ISAR4_EL1), NULL, get_id_isar4_el1 }, | |
1852 | { SYS_DESC(SYS_ID_ISAR5_EL1), NULL, get_id_isar5_el1 }, | |
1853 | { SYS_DESC(SYS_CLIDR_EL1), NULL, get_clidr_el1 }, | |
1854 | { SYS_DESC(SYS_AIDR_EL1), NULL, get_aidr_el1 }, | |
1855 | { SYS_DESC(SYS_CTR_EL0), NULL, get_ctr_el0 }, | |
7c8c5e6a MZ |
1856 | }; |
1857 | ||
26c99af1 | 1858 | static int reg_from_user(u64 *val, const void __user *uaddr, u64 id) |
7c8c5e6a | 1859 | { |
7c8c5e6a MZ |
1860 | if (copy_from_user(val, uaddr, KVM_REG_SIZE(id)) != 0) |
1861 | return -EFAULT; | |
1862 | return 0; | |
1863 | } | |
1864 | ||
26c99af1 | 1865 | static int reg_to_user(void __user *uaddr, const u64 *val, u64 id) |
7c8c5e6a | 1866 | { |
7c8c5e6a MZ |
1867 | if (copy_to_user(uaddr, val, KVM_REG_SIZE(id)) != 0) |
1868 | return -EFAULT; | |
1869 | return 0; | |
1870 | } | |
1871 | ||
1872 | static int get_invariant_sys_reg(u64 id, void __user *uaddr) | |
1873 | { | |
1874 | struct sys_reg_params params; | |
1875 | const struct sys_reg_desc *r; | |
1876 | ||
4b927b94 VK |
1877 | r = find_reg_by_id(id, ¶ms, invariant_sys_regs, |
1878 | ARRAY_SIZE(invariant_sys_regs)); | |
7c8c5e6a MZ |
1879 | if (!r) |
1880 | return -ENOENT; | |
1881 | ||
1882 | return reg_to_user(uaddr, &r->val, id); | |
1883 | } | |
1884 | ||
1885 | static int set_invariant_sys_reg(u64 id, void __user *uaddr) | |
1886 | { | |
1887 | struct sys_reg_params params; | |
1888 | const struct sys_reg_desc *r; | |
1889 | int err; | |
1890 | u64 val = 0; /* Make sure high bits are 0 for 32-bit regs */ | |
1891 | ||
4b927b94 VK |
1892 | r = find_reg_by_id(id, ¶ms, invariant_sys_regs, |
1893 | ARRAY_SIZE(invariant_sys_regs)); | |
7c8c5e6a MZ |
1894 | if (!r) |
1895 | return -ENOENT; | |
1896 | ||
1897 | err = reg_from_user(&val, uaddr, id); | |
1898 | if (err) | |
1899 | return err; | |
1900 | ||
1901 | /* This is what we mean by invariant: you can't change it. */ | |
1902 | if (r->val != val) | |
1903 | return -EINVAL; | |
1904 | ||
1905 | return 0; | |
1906 | } | |
1907 | ||
1908 | static bool is_valid_cache(u32 val) | |
1909 | { | |
1910 | u32 level, ctype; | |
1911 | ||
1912 | if (val >= CSSELR_MAX) | |
18d45766 | 1913 | return false; |
7c8c5e6a MZ |
1914 | |
1915 | /* Bottom bit is Instruction or Data bit. Next 3 bits are level. */ | |
1916 | level = (val >> 1); | |
1917 | ctype = (cache_levels >> (level * 3)) & 7; | |
1918 | ||
1919 | switch (ctype) { | |
1920 | case 0: /* No cache */ | |
1921 | return false; | |
1922 | case 1: /* Instruction cache only */ | |
1923 | return (val & 1); | |
1924 | case 2: /* Data cache only */ | |
1925 | case 4: /* Unified cache */ | |
1926 | return !(val & 1); | |
1927 | case 3: /* Separate instruction and data caches */ | |
1928 | return true; | |
1929 | default: /* Reserved: we can't know instruction or data. */ | |
1930 | return false; | |
1931 | } | |
1932 | } | |
1933 | ||
1934 | static int demux_c15_get(u64 id, void __user *uaddr) | |
1935 | { | |
1936 | u32 val; | |
1937 | u32 __user *uval = uaddr; | |
1938 | ||
1939 | /* Fail if we have unknown bits set. */ | |
1940 | if (id & ~(KVM_REG_ARCH_MASK|KVM_REG_SIZE_MASK|KVM_REG_ARM_COPROC_MASK | |
1941 | | ((1 << KVM_REG_ARM_COPROC_SHIFT)-1))) | |
1942 | return -ENOENT; | |
1943 | ||
1944 | switch (id & KVM_REG_ARM_DEMUX_ID_MASK) { | |
1945 | case KVM_REG_ARM_DEMUX_ID_CCSIDR: | |
1946 | if (KVM_REG_SIZE(id) != 4) | |
1947 | return -ENOENT; | |
1948 | val = (id & KVM_REG_ARM_DEMUX_VAL_MASK) | |
1949 | >> KVM_REG_ARM_DEMUX_VAL_SHIFT; | |
1950 | if (!is_valid_cache(val)) | |
1951 | return -ENOENT; | |
1952 | ||
1953 | return put_user(get_ccsidr(val), uval); | |
1954 | default: | |
1955 | return -ENOENT; | |
1956 | } | |
1957 | } | |
1958 | ||
1959 | static int demux_c15_set(u64 id, void __user *uaddr) | |
1960 | { | |
1961 | u32 val, newval; | |
1962 | u32 __user *uval = uaddr; | |
1963 | ||
1964 | /* Fail if we have unknown bits set. */ | |
1965 | if (id & ~(KVM_REG_ARCH_MASK|KVM_REG_SIZE_MASK|KVM_REG_ARM_COPROC_MASK | |
1966 | | ((1 << KVM_REG_ARM_COPROC_SHIFT)-1))) | |
1967 | return -ENOENT; | |
1968 | ||
1969 | switch (id & KVM_REG_ARM_DEMUX_ID_MASK) { | |
1970 | case KVM_REG_ARM_DEMUX_ID_CCSIDR: | |
1971 | if (KVM_REG_SIZE(id) != 4) | |
1972 | return -ENOENT; | |
1973 | val = (id & KVM_REG_ARM_DEMUX_VAL_MASK) | |
1974 | >> KVM_REG_ARM_DEMUX_VAL_SHIFT; | |
1975 | if (!is_valid_cache(val)) | |
1976 | return -ENOENT; | |
1977 | ||
1978 | if (get_user(newval, uval)) | |
1979 | return -EFAULT; | |
1980 | ||
1981 | /* This is also invariant: you can't change it. */ | |
1982 | if (newval != get_ccsidr(val)) | |
1983 | return -EINVAL; | |
1984 | return 0; | |
1985 | default: | |
1986 | return -ENOENT; | |
1987 | } | |
1988 | } | |
1989 | ||
1990 | int kvm_arm_sys_reg_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg) | |
1991 | { | |
1992 | const struct sys_reg_desc *r; | |
1993 | void __user *uaddr = (void __user *)(unsigned long)reg->addr; | |
1994 | ||
1995 | if ((reg->id & KVM_REG_ARM_COPROC_MASK) == KVM_REG_ARM_DEMUX) | |
1996 | return demux_c15_get(reg->id, uaddr); | |
1997 | ||
1998 | if (KVM_REG_SIZE(reg->id) != sizeof(__u64)) | |
1999 | return -ENOENT; | |
2000 | ||
2001 | r = index_to_sys_reg_desc(vcpu, reg->id); | |
2002 | if (!r) | |
2003 | return get_invariant_sys_reg(reg->id, uaddr); | |
2004 | ||
84e690bf AB |
2005 | if (r->get_user) |
2006 | return (r->get_user)(vcpu, r, reg, uaddr); | |
2007 | ||
7c8c5e6a MZ |
2008 | return reg_to_user(uaddr, &vcpu_sys_reg(vcpu, r->reg), reg->id); |
2009 | } | |
2010 | ||
2011 | int kvm_arm_sys_reg_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg) | |
2012 | { | |
2013 | const struct sys_reg_desc *r; | |
2014 | void __user *uaddr = (void __user *)(unsigned long)reg->addr; | |
2015 | ||
2016 | if ((reg->id & KVM_REG_ARM_COPROC_MASK) == KVM_REG_ARM_DEMUX) | |
2017 | return demux_c15_set(reg->id, uaddr); | |
2018 | ||
2019 | if (KVM_REG_SIZE(reg->id) != sizeof(__u64)) | |
2020 | return -ENOENT; | |
2021 | ||
2022 | r = index_to_sys_reg_desc(vcpu, reg->id); | |
2023 | if (!r) | |
2024 | return set_invariant_sys_reg(reg->id, uaddr); | |
2025 | ||
84e690bf AB |
2026 | if (r->set_user) |
2027 | return (r->set_user)(vcpu, r, reg, uaddr); | |
2028 | ||
7c8c5e6a MZ |
2029 | return reg_from_user(&vcpu_sys_reg(vcpu, r->reg), uaddr, reg->id); |
2030 | } | |
2031 | ||
2032 | static unsigned int num_demux_regs(void) | |
2033 | { | |
2034 | unsigned int i, count = 0; | |
2035 | ||
2036 | for (i = 0; i < CSSELR_MAX; i++) | |
2037 | if (is_valid_cache(i)) | |
2038 | count++; | |
2039 | ||
2040 | return count; | |
2041 | } | |
2042 | ||
2043 | static int write_demux_regids(u64 __user *uindices) | |
2044 | { | |
efd48cea | 2045 | u64 val = KVM_REG_ARM64 | KVM_REG_SIZE_U32 | KVM_REG_ARM_DEMUX; |
7c8c5e6a MZ |
2046 | unsigned int i; |
2047 | ||
2048 | val |= KVM_REG_ARM_DEMUX_ID_CCSIDR; | |
2049 | for (i = 0; i < CSSELR_MAX; i++) { | |
2050 | if (!is_valid_cache(i)) | |
2051 | continue; | |
2052 | if (put_user(val | i, uindices)) | |
2053 | return -EFAULT; | |
2054 | uindices++; | |
2055 | } | |
2056 | return 0; | |
2057 | } | |
2058 | ||
2059 | static u64 sys_reg_to_index(const struct sys_reg_desc *reg) | |
2060 | { | |
2061 | return (KVM_REG_ARM64 | KVM_REG_SIZE_U64 | | |
2062 | KVM_REG_ARM64_SYSREG | | |
2063 | (reg->Op0 << KVM_REG_ARM64_SYSREG_OP0_SHIFT) | | |
2064 | (reg->Op1 << KVM_REG_ARM64_SYSREG_OP1_SHIFT) | | |
2065 | (reg->CRn << KVM_REG_ARM64_SYSREG_CRN_SHIFT) | | |
2066 | (reg->CRm << KVM_REG_ARM64_SYSREG_CRM_SHIFT) | | |
2067 | (reg->Op2 << KVM_REG_ARM64_SYSREG_OP2_SHIFT)); | |
2068 | } | |
2069 | ||
2070 | static bool copy_reg_to_user(const struct sys_reg_desc *reg, u64 __user **uind) | |
2071 | { | |
2072 | if (!*uind) | |
2073 | return true; | |
2074 | ||
2075 | if (put_user(sys_reg_to_index(reg), *uind)) | |
2076 | return false; | |
2077 | ||
2078 | (*uind)++; | |
2079 | return true; | |
2080 | } | |
2081 | ||
2082 | /* Assumed ordered tables, see kvm_sys_reg_table_init. */ | |
2083 | static int walk_sys_regs(struct kvm_vcpu *vcpu, u64 __user *uind) | |
2084 | { | |
2085 | const struct sys_reg_desc *i1, *i2, *end1, *end2; | |
2086 | unsigned int total = 0; | |
2087 | size_t num; | |
2088 | ||
2089 | /* We check for duplicates here, to allow arch-specific overrides. */ | |
62a89c44 | 2090 | i1 = get_target_table(vcpu->arch.target, true, &num); |
7c8c5e6a MZ |
2091 | end1 = i1 + num; |
2092 | i2 = sys_reg_descs; | |
2093 | end2 = sys_reg_descs + ARRAY_SIZE(sys_reg_descs); | |
2094 | ||
2095 | BUG_ON(i1 == end1 || i2 == end2); | |
2096 | ||
2097 | /* Walk carefully, as both tables may refer to the same register. */ | |
2098 | while (i1 || i2) { | |
2099 | int cmp = cmp_sys_reg(i1, i2); | |
2100 | /* target-specific overrides generic entry. */ | |
2101 | if (cmp <= 0) { | |
2102 | /* Ignore registers we trap but don't save. */ | |
2103 | if (i1->reg) { | |
2104 | if (!copy_reg_to_user(i1, &uind)) | |
2105 | return -EFAULT; | |
2106 | total++; | |
2107 | } | |
2108 | } else { | |
2109 | /* Ignore registers we trap but don't save. */ | |
2110 | if (i2->reg) { | |
2111 | if (!copy_reg_to_user(i2, &uind)) | |
2112 | return -EFAULT; | |
2113 | total++; | |
2114 | } | |
2115 | } | |
2116 | ||
2117 | if (cmp <= 0 && ++i1 == end1) | |
2118 | i1 = NULL; | |
2119 | if (cmp >= 0 && ++i2 == end2) | |
2120 | i2 = NULL; | |
2121 | } | |
2122 | return total; | |
2123 | } | |
2124 | ||
2125 | unsigned long kvm_arm_num_sys_reg_descs(struct kvm_vcpu *vcpu) | |
2126 | { | |
2127 | return ARRAY_SIZE(invariant_sys_regs) | |
2128 | + num_demux_regs() | |
2129 | + walk_sys_regs(vcpu, (u64 __user *)NULL); | |
2130 | } | |
2131 | ||
2132 | int kvm_arm_copy_sys_reg_indices(struct kvm_vcpu *vcpu, u64 __user *uindices) | |
2133 | { | |
2134 | unsigned int i; | |
2135 | int err; | |
2136 | ||
2137 | /* Then give them all the invariant registers' indices. */ | |
2138 | for (i = 0; i < ARRAY_SIZE(invariant_sys_regs); i++) { | |
2139 | if (put_user(sys_reg_to_index(&invariant_sys_regs[i]), uindices)) | |
2140 | return -EFAULT; | |
2141 | uindices++; | |
2142 | } | |
2143 | ||
2144 | err = walk_sys_regs(vcpu, uindices); | |
2145 | if (err < 0) | |
2146 | return err; | |
2147 | uindices += err; | |
2148 | ||
2149 | return write_demux_regids(uindices); | |
2150 | } | |
2151 | ||
e6a95517 MZ |
2152 | static int check_sysreg_table(const struct sys_reg_desc *table, unsigned int n) |
2153 | { | |
2154 | unsigned int i; | |
2155 | ||
2156 | for (i = 1; i < n; i++) { | |
2157 | if (cmp_sys_reg(&table[i-1], &table[i]) >= 0) { | |
2158 | kvm_err("sys_reg table %p out of order (%d)\n", table, i - 1); | |
2159 | return 1; | |
2160 | } | |
2161 | } | |
2162 | ||
2163 | return 0; | |
2164 | } | |
2165 | ||
7c8c5e6a MZ |
2166 | void kvm_sys_reg_table_init(void) |
2167 | { | |
2168 | unsigned int i; | |
2169 | struct sys_reg_desc clidr; | |
2170 | ||
2171 | /* Make sure tables are unique and in order. */ | |
e6a95517 MZ |
2172 | BUG_ON(check_sysreg_table(sys_reg_descs, ARRAY_SIZE(sys_reg_descs))); |
2173 | BUG_ON(check_sysreg_table(cp14_regs, ARRAY_SIZE(cp14_regs))); | |
2174 | BUG_ON(check_sysreg_table(cp14_64_regs, ARRAY_SIZE(cp14_64_regs))); | |
2175 | BUG_ON(check_sysreg_table(cp15_regs, ARRAY_SIZE(cp15_regs))); | |
2176 | BUG_ON(check_sysreg_table(cp15_64_regs, ARRAY_SIZE(cp15_64_regs))); | |
2177 | BUG_ON(check_sysreg_table(invariant_sys_regs, ARRAY_SIZE(invariant_sys_regs))); | |
7c8c5e6a MZ |
2178 | |
2179 | /* We abuse the reset function to overwrite the table itself. */ | |
2180 | for (i = 0; i < ARRAY_SIZE(invariant_sys_regs); i++) | |
2181 | invariant_sys_regs[i].reset(NULL, &invariant_sys_regs[i]); | |
2182 | ||
2183 | /* | |
2184 | * CLIDR format is awkward, so clean it up. See ARM B4.1.20: | |
2185 | * | |
2186 | * If software reads the Cache Type fields from Ctype1 | |
2187 | * upwards, once it has seen a value of 0b000, no caches | |
2188 | * exist at further-out levels of the hierarchy. So, for | |
2189 | * example, if Ctype3 is the first Cache Type field with a | |
2190 | * value of 0b000, the values of Ctype4 to Ctype7 must be | |
2191 | * ignored. | |
2192 | */ | |
2193 | get_clidr_el1(NULL, &clidr); /* Ugly... */ | |
2194 | cache_levels = clidr.val; | |
2195 | for (i = 0; i < 7; i++) | |
2196 | if (((cache_levels >> (i*3)) & 7) == 0) | |
2197 | break; | |
2198 | /* Clear all higher bits. */ | |
2199 | cache_levels &= (1 << (i*3))-1; | |
2200 | } | |
2201 | ||
2202 | /** | |
2203 | * kvm_reset_sys_regs - sets system registers to reset value | |
2204 | * @vcpu: The VCPU pointer | |
2205 | * | |
2206 | * This function finds the right table above and sets the registers on the | |
2207 | * virtual CPU struct to their architecturally defined reset values. | |
2208 | */ | |
2209 | void kvm_reset_sys_regs(struct kvm_vcpu *vcpu) | |
2210 | { | |
2211 | size_t num; | |
2212 | const struct sys_reg_desc *table; | |
2213 | ||
2214 | /* Catch someone adding a register without putting in reset entry. */ | |
2215 | memset(&vcpu->arch.ctxt.sys_regs, 0x42, sizeof(vcpu->arch.ctxt.sys_regs)); | |
2216 | ||
2217 | /* Generic chip reset first (so target could override). */ | |
2218 | reset_sys_reg_descs(vcpu, sys_reg_descs, ARRAY_SIZE(sys_reg_descs)); | |
2219 | ||
62a89c44 | 2220 | table = get_target_table(vcpu->arch.target, true, &num); |
7c8c5e6a MZ |
2221 | reset_sys_reg_descs(vcpu, table, num); |
2222 | ||
2223 | for (num = 1; num < NR_SYS_REGS; num++) | |
2224 | if (vcpu_sys_reg(vcpu, num) == 0x4242424242424242) | |
2225 | panic("Didn't reset vcpu_sys_reg(%zi)", num); | |
2226 | } |