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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> |
c6d01a94 | 39 | |
7c8c5e6a MZ |
40 | #include <trace/events/kvm.h> |
41 | ||
42 | #include "sys_regs.h" | |
43 | ||
eef8c85a AB |
44 | #include "trace.h" |
45 | ||
7c8c5e6a MZ |
46 | /* |
47 | * All of this file is extremly similar to the ARM coproc.c, but the | |
48 | * types are different. My gut feeling is that it should be pretty | |
49 | * easy to merge, but that would be an ABI breakage -- again. VFP | |
50 | * would also need to be abstracted. | |
62a89c44 MZ |
51 | * |
52 | * For AArch32, we only take care of what is being trapped. Anything | |
53 | * that has to do with init and userspace access has to go via the | |
54 | * 64bit interface. | |
7c8c5e6a MZ |
55 | */ |
56 | ||
57 | /* 3 bits per cache level, as per CLIDR, but non-existent caches always 0 */ | |
58 | static u32 cache_levels; | |
59 | ||
60 | /* CSSELR values; used to index KVM_REG_ARM_DEMUX_ID_CCSIDR */ | |
61 | #define CSSELR_MAX 12 | |
62 | ||
63 | /* Which cache CCSIDR represents depends on CSSELR value. */ | |
64 | static u32 get_ccsidr(u32 csselr) | |
65 | { | |
66 | u32 ccsidr; | |
67 | ||
68 | /* Make sure noone else changes CSSELR during this! */ | |
69 | local_irq_disable(); | |
70 | /* Put value into CSSELR */ | |
71 | asm volatile("msr csselr_el1, %x0" : : "r" (csselr)); | |
72 | isb(); | |
73 | /* Read result out of CCSIDR */ | |
74 | asm volatile("mrs %0, ccsidr_el1" : "=r" (ccsidr)); | |
75 | local_irq_enable(); | |
76 | ||
77 | return ccsidr; | |
78 | } | |
79 | ||
3c1e7165 MZ |
80 | /* |
81 | * See note at ARMv7 ARM B1.14.4 (TL;DR: S/W ops are not easily virtualized). | |
82 | */ | |
7c8c5e6a | 83 | static bool access_dcsw(struct kvm_vcpu *vcpu, |
3fec037d | 84 | struct sys_reg_params *p, |
7c8c5e6a MZ |
85 | const struct sys_reg_desc *r) |
86 | { | |
7c8c5e6a MZ |
87 | if (!p->is_write) |
88 | return read_from_write_only(vcpu, p); | |
89 | ||
3c1e7165 | 90 | kvm_set_way_flush(vcpu); |
7c8c5e6a MZ |
91 | return true; |
92 | } | |
93 | ||
4d44923b MZ |
94 | /* |
95 | * Generic accessor for VM registers. Only called as long as HCR_TVM | |
3c1e7165 MZ |
96 | * is set. If the guest enables the MMU, we stop trapping the VM |
97 | * sys_regs and leave it in complete control of the caches. | |
4d44923b MZ |
98 | */ |
99 | static bool access_vm_reg(struct kvm_vcpu *vcpu, | |
3fec037d | 100 | struct sys_reg_params *p, |
4d44923b MZ |
101 | const struct sys_reg_desc *r) |
102 | { | |
3c1e7165 | 103 | bool was_enabled = vcpu_has_cache_enabled(vcpu); |
4d44923b MZ |
104 | |
105 | BUG_ON(!p->is_write); | |
106 | ||
dedf97e8 | 107 | if (!p->is_aarch32) { |
2ec5be3d | 108 | vcpu_sys_reg(vcpu, r->reg) = p->regval; |
dedf97e8 MZ |
109 | } else { |
110 | if (!p->is_32bit) | |
2ec5be3d PF |
111 | vcpu_cp15_64_high(vcpu, r->reg) = upper_32_bits(p->regval); |
112 | vcpu_cp15_64_low(vcpu, r->reg) = lower_32_bits(p->regval); | |
dedf97e8 | 113 | } |
f0a3eaff | 114 | |
3c1e7165 | 115 | kvm_toggle_cache(vcpu, was_enabled); |
4d44923b MZ |
116 | return true; |
117 | } | |
118 | ||
6d52f35a AP |
119 | /* |
120 | * Trap handler for the GICv3 SGI generation system register. | |
121 | * Forward the request to the VGIC emulation. | |
122 | * The cp15_64 code makes sure this automatically works | |
123 | * for both AArch64 and AArch32 accesses. | |
124 | */ | |
125 | static bool access_gic_sgi(struct kvm_vcpu *vcpu, | |
3fec037d | 126 | struct sys_reg_params *p, |
6d52f35a AP |
127 | const struct sys_reg_desc *r) |
128 | { | |
6d52f35a AP |
129 | if (!p->is_write) |
130 | return read_from_write_only(vcpu, p); | |
131 | ||
2ec5be3d | 132 | vgic_v3_dispatch_sgi(vcpu, p->regval); |
6d52f35a AP |
133 | |
134 | return true; | |
135 | } | |
136 | ||
7609c125 | 137 | static bool trap_raz_wi(struct kvm_vcpu *vcpu, |
3fec037d | 138 | struct sys_reg_params *p, |
7609c125 | 139 | const struct sys_reg_desc *r) |
7c8c5e6a MZ |
140 | { |
141 | if (p->is_write) | |
142 | return ignore_write(vcpu, p); | |
143 | else | |
144 | return read_zero(vcpu, p); | |
145 | } | |
146 | ||
0c557ed4 | 147 | static bool trap_oslsr_el1(struct kvm_vcpu *vcpu, |
3fec037d | 148 | struct sys_reg_params *p, |
0c557ed4 MZ |
149 | const struct sys_reg_desc *r) |
150 | { | |
151 | if (p->is_write) { | |
152 | return ignore_write(vcpu, p); | |
153 | } else { | |
2ec5be3d | 154 | p->regval = (1 << 3); |
0c557ed4 MZ |
155 | return true; |
156 | } | |
157 | } | |
158 | ||
159 | static bool trap_dbgauthstatus_el1(struct kvm_vcpu *vcpu, | |
3fec037d | 160 | struct sys_reg_params *p, |
0c557ed4 MZ |
161 | const struct sys_reg_desc *r) |
162 | { | |
163 | if (p->is_write) { | |
164 | return ignore_write(vcpu, p); | |
165 | } else { | |
166 | u32 val; | |
167 | asm volatile("mrs %0, dbgauthstatus_el1" : "=r" (val)); | |
2ec5be3d | 168 | p->regval = val; |
0c557ed4 MZ |
169 | return true; |
170 | } | |
171 | } | |
172 | ||
173 | /* | |
174 | * We want to avoid world-switching all the DBG registers all the | |
175 | * time: | |
176 | * | |
177 | * - If we've touched any debug register, it is likely that we're | |
178 | * going to touch more of them. It then makes sense to disable the | |
179 | * traps and start doing the save/restore dance | |
180 | * - If debug is active (DBG_MDSCR_KDE or DBG_MDSCR_MDE set), it is | |
181 | * then mandatory to save/restore the registers, as the guest | |
182 | * depends on them. | |
183 | * | |
184 | * For this, we use a DIRTY bit, indicating the guest has modified the | |
185 | * debug registers, used as follow: | |
186 | * | |
187 | * On guest entry: | |
188 | * - If the dirty bit is set (because we're coming back from trapping), | |
189 | * disable the traps, save host registers, restore guest registers. | |
190 | * - If debug is actively in use (DBG_MDSCR_KDE or DBG_MDSCR_MDE set), | |
191 | * set the dirty bit, disable the traps, save host registers, | |
192 | * restore guest registers. | |
193 | * - Otherwise, enable the traps | |
194 | * | |
195 | * On guest exit: | |
196 | * - If the dirty bit is set, save guest registers, restore host | |
197 | * registers and clear the dirty bit. This ensure that the host can | |
198 | * now use the debug registers. | |
199 | */ | |
200 | static bool trap_debug_regs(struct kvm_vcpu *vcpu, | |
3fec037d | 201 | struct sys_reg_params *p, |
0c557ed4 MZ |
202 | const struct sys_reg_desc *r) |
203 | { | |
204 | if (p->is_write) { | |
2ec5be3d | 205 | vcpu_sys_reg(vcpu, r->reg) = p->regval; |
0c557ed4 MZ |
206 | vcpu->arch.debug_flags |= KVM_ARM64_DEBUG_DIRTY; |
207 | } else { | |
2ec5be3d | 208 | p->regval = vcpu_sys_reg(vcpu, r->reg); |
0c557ed4 MZ |
209 | } |
210 | ||
2ec5be3d | 211 | trace_trap_reg(__func__, r->reg, p->is_write, p->regval); |
eef8c85a | 212 | |
0c557ed4 MZ |
213 | return true; |
214 | } | |
215 | ||
84e690bf AB |
216 | /* |
217 | * reg_to_dbg/dbg_to_reg | |
218 | * | |
219 | * A 32 bit write to a debug register leave top bits alone | |
220 | * A 32 bit read from a debug register only returns the bottom bits | |
221 | * | |
222 | * All writes will set the KVM_ARM64_DEBUG_DIRTY flag to ensure the | |
223 | * hyp.S code switches between host and guest values in future. | |
224 | */ | |
281243cb MZ |
225 | static void reg_to_dbg(struct kvm_vcpu *vcpu, |
226 | struct sys_reg_params *p, | |
227 | u64 *dbg_reg) | |
84e690bf | 228 | { |
2ec5be3d | 229 | u64 val = p->regval; |
84e690bf AB |
230 | |
231 | if (p->is_32bit) { | |
232 | val &= 0xffffffffUL; | |
233 | val |= ((*dbg_reg >> 32) << 32); | |
234 | } | |
235 | ||
236 | *dbg_reg = val; | |
237 | vcpu->arch.debug_flags |= KVM_ARM64_DEBUG_DIRTY; | |
238 | } | |
239 | ||
281243cb MZ |
240 | static void dbg_to_reg(struct kvm_vcpu *vcpu, |
241 | struct sys_reg_params *p, | |
242 | u64 *dbg_reg) | |
84e690bf | 243 | { |
2ec5be3d | 244 | p->regval = *dbg_reg; |
84e690bf | 245 | if (p->is_32bit) |
2ec5be3d | 246 | p->regval &= 0xffffffffUL; |
84e690bf AB |
247 | } |
248 | ||
281243cb MZ |
249 | static bool trap_bvr(struct kvm_vcpu *vcpu, |
250 | struct sys_reg_params *p, | |
251 | const struct sys_reg_desc *rd) | |
84e690bf AB |
252 | { |
253 | u64 *dbg_reg = &vcpu->arch.vcpu_debug_state.dbg_bvr[rd->reg]; | |
254 | ||
255 | if (p->is_write) | |
256 | reg_to_dbg(vcpu, p, dbg_reg); | |
257 | else | |
258 | dbg_to_reg(vcpu, p, dbg_reg); | |
259 | ||
eef8c85a AB |
260 | trace_trap_reg(__func__, rd->reg, p->is_write, *dbg_reg); |
261 | ||
84e690bf AB |
262 | return true; |
263 | } | |
264 | ||
265 | static int set_bvr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, | |
266 | const struct kvm_one_reg *reg, void __user *uaddr) | |
267 | { | |
268 | __u64 *r = &vcpu->arch.vcpu_debug_state.dbg_bvr[rd->reg]; | |
269 | ||
1713e5aa | 270 | if (copy_from_user(r, uaddr, KVM_REG_SIZE(reg->id)) != 0) |
84e690bf AB |
271 | return -EFAULT; |
272 | return 0; | |
273 | } | |
274 | ||
275 | static int get_bvr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, | |
276 | const struct kvm_one_reg *reg, void __user *uaddr) | |
277 | { | |
278 | __u64 *r = &vcpu->arch.vcpu_debug_state.dbg_bvr[rd->reg]; | |
279 | ||
280 | if (copy_to_user(uaddr, r, KVM_REG_SIZE(reg->id)) != 0) | |
281 | return -EFAULT; | |
282 | return 0; | |
283 | } | |
284 | ||
281243cb MZ |
285 | static void reset_bvr(struct kvm_vcpu *vcpu, |
286 | const struct sys_reg_desc *rd) | |
84e690bf AB |
287 | { |
288 | vcpu->arch.vcpu_debug_state.dbg_bvr[rd->reg] = rd->val; | |
289 | } | |
290 | ||
281243cb MZ |
291 | static bool trap_bcr(struct kvm_vcpu *vcpu, |
292 | struct sys_reg_params *p, | |
293 | const struct sys_reg_desc *rd) | |
84e690bf AB |
294 | { |
295 | u64 *dbg_reg = &vcpu->arch.vcpu_debug_state.dbg_bcr[rd->reg]; | |
296 | ||
297 | if (p->is_write) | |
298 | reg_to_dbg(vcpu, p, dbg_reg); | |
299 | else | |
300 | dbg_to_reg(vcpu, p, dbg_reg); | |
301 | ||
eef8c85a AB |
302 | trace_trap_reg(__func__, rd->reg, p->is_write, *dbg_reg); |
303 | ||
84e690bf AB |
304 | return true; |
305 | } | |
306 | ||
307 | static int set_bcr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, | |
308 | const struct kvm_one_reg *reg, void __user *uaddr) | |
309 | { | |
310 | __u64 *r = &vcpu->arch.vcpu_debug_state.dbg_bcr[rd->reg]; | |
311 | ||
1713e5aa | 312 | if (copy_from_user(r, uaddr, KVM_REG_SIZE(reg->id)) != 0) |
84e690bf AB |
313 | return -EFAULT; |
314 | ||
315 | return 0; | |
316 | } | |
317 | ||
318 | static int get_bcr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, | |
319 | const struct kvm_one_reg *reg, void __user *uaddr) | |
320 | { | |
321 | __u64 *r = &vcpu->arch.vcpu_debug_state.dbg_bcr[rd->reg]; | |
322 | ||
323 | if (copy_to_user(uaddr, r, KVM_REG_SIZE(reg->id)) != 0) | |
324 | return -EFAULT; | |
325 | return 0; | |
326 | } | |
327 | ||
281243cb MZ |
328 | static void reset_bcr(struct kvm_vcpu *vcpu, |
329 | const struct sys_reg_desc *rd) | |
84e690bf AB |
330 | { |
331 | vcpu->arch.vcpu_debug_state.dbg_bcr[rd->reg] = rd->val; | |
332 | } | |
333 | ||
281243cb MZ |
334 | static bool trap_wvr(struct kvm_vcpu *vcpu, |
335 | struct sys_reg_params *p, | |
336 | const struct sys_reg_desc *rd) | |
84e690bf AB |
337 | { |
338 | u64 *dbg_reg = &vcpu->arch.vcpu_debug_state.dbg_wvr[rd->reg]; | |
339 | ||
340 | if (p->is_write) | |
341 | reg_to_dbg(vcpu, p, dbg_reg); | |
342 | else | |
343 | dbg_to_reg(vcpu, p, dbg_reg); | |
344 | ||
eef8c85a AB |
345 | trace_trap_reg(__func__, rd->reg, p->is_write, |
346 | vcpu->arch.vcpu_debug_state.dbg_wvr[rd->reg]); | |
347 | ||
84e690bf AB |
348 | return true; |
349 | } | |
350 | ||
351 | static int set_wvr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, | |
352 | const struct kvm_one_reg *reg, void __user *uaddr) | |
353 | { | |
354 | __u64 *r = &vcpu->arch.vcpu_debug_state.dbg_wvr[rd->reg]; | |
355 | ||
1713e5aa | 356 | if (copy_from_user(r, uaddr, KVM_REG_SIZE(reg->id)) != 0) |
84e690bf AB |
357 | return -EFAULT; |
358 | return 0; | |
359 | } | |
360 | ||
361 | static int get_wvr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, | |
362 | const struct kvm_one_reg *reg, void __user *uaddr) | |
363 | { | |
364 | __u64 *r = &vcpu->arch.vcpu_debug_state.dbg_wvr[rd->reg]; | |
365 | ||
366 | if (copy_to_user(uaddr, r, KVM_REG_SIZE(reg->id)) != 0) | |
367 | return -EFAULT; | |
368 | return 0; | |
369 | } | |
370 | ||
281243cb MZ |
371 | static void reset_wvr(struct kvm_vcpu *vcpu, |
372 | const struct sys_reg_desc *rd) | |
84e690bf AB |
373 | { |
374 | vcpu->arch.vcpu_debug_state.dbg_wvr[rd->reg] = rd->val; | |
375 | } | |
376 | ||
281243cb MZ |
377 | static bool trap_wcr(struct kvm_vcpu *vcpu, |
378 | struct sys_reg_params *p, | |
379 | const struct sys_reg_desc *rd) | |
84e690bf AB |
380 | { |
381 | u64 *dbg_reg = &vcpu->arch.vcpu_debug_state.dbg_wcr[rd->reg]; | |
382 | ||
383 | if (p->is_write) | |
384 | reg_to_dbg(vcpu, p, dbg_reg); | |
385 | else | |
386 | dbg_to_reg(vcpu, p, dbg_reg); | |
387 | ||
eef8c85a AB |
388 | trace_trap_reg(__func__, rd->reg, p->is_write, *dbg_reg); |
389 | ||
84e690bf AB |
390 | return true; |
391 | } | |
392 | ||
393 | static int set_wcr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, | |
394 | const struct kvm_one_reg *reg, void __user *uaddr) | |
395 | { | |
396 | __u64 *r = &vcpu->arch.vcpu_debug_state.dbg_wcr[rd->reg]; | |
397 | ||
1713e5aa | 398 | if (copy_from_user(r, uaddr, KVM_REG_SIZE(reg->id)) != 0) |
84e690bf AB |
399 | return -EFAULT; |
400 | return 0; | |
401 | } | |
402 | ||
403 | static int get_wcr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, | |
404 | const struct kvm_one_reg *reg, void __user *uaddr) | |
405 | { | |
406 | __u64 *r = &vcpu->arch.vcpu_debug_state.dbg_wcr[rd->reg]; | |
407 | ||
408 | if (copy_to_user(uaddr, r, KVM_REG_SIZE(reg->id)) != 0) | |
409 | return -EFAULT; | |
410 | return 0; | |
411 | } | |
412 | ||
281243cb MZ |
413 | static void reset_wcr(struct kvm_vcpu *vcpu, |
414 | const struct sys_reg_desc *rd) | |
84e690bf AB |
415 | { |
416 | vcpu->arch.vcpu_debug_state.dbg_wcr[rd->reg] = rd->val; | |
417 | } | |
418 | ||
7c8c5e6a MZ |
419 | static void reset_amair_el1(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r) |
420 | { | |
421 | u64 amair; | |
422 | ||
423 | asm volatile("mrs %0, amair_el1\n" : "=r" (amair)); | |
424 | vcpu_sys_reg(vcpu, AMAIR_EL1) = amair; | |
425 | } | |
426 | ||
427 | static void reset_mpidr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r) | |
428 | { | |
4429fc64 AP |
429 | u64 mpidr; |
430 | ||
7c8c5e6a | 431 | /* |
4429fc64 AP |
432 | * Map the vcpu_id into the first three affinity level fields of |
433 | * the MPIDR. We limit the number of VCPUs in level 0 due to a | |
434 | * limitation to 16 CPUs in that level in the ICC_SGIxR registers | |
435 | * of the GICv3 to be able to address each CPU directly when | |
436 | * sending IPIs. | |
7c8c5e6a | 437 | */ |
4429fc64 AP |
438 | mpidr = (vcpu->vcpu_id & 0x0f) << MPIDR_LEVEL_SHIFT(0); |
439 | mpidr |= ((vcpu->vcpu_id >> 4) & 0xff) << MPIDR_LEVEL_SHIFT(1); | |
440 | mpidr |= ((vcpu->vcpu_id >> 12) & 0xff) << MPIDR_LEVEL_SHIFT(2); | |
441 | vcpu_sys_reg(vcpu, MPIDR_EL1) = (1ULL << 31) | mpidr; | |
7c8c5e6a MZ |
442 | } |
443 | ||
ab946834 SZ |
444 | static void reset_pmcr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r) |
445 | { | |
446 | u64 pmcr, val; | |
447 | ||
448 | asm volatile("mrs %0, pmcr_el0\n" : "=r" (pmcr)); | |
449 | /* Writable bits of PMCR_EL0 (ARMV8_PMU_PMCR_MASK) is reset to UNKNOWN | |
450 | * except PMCR.E resetting to zero. | |
451 | */ | |
452 | val = ((pmcr & ~ARMV8_PMU_PMCR_MASK) | |
453 | | (ARMV8_PMU_PMCR_MASK & 0xdecafbad)) & (~ARMV8_PMU_PMCR_E); | |
454 | vcpu_sys_reg(vcpu, PMCR_EL0) = val; | |
455 | } | |
456 | ||
d692b8ad SZ |
457 | static bool pmu_access_el0_disabled(struct kvm_vcpu *vcpu) |
458 | { | |
459 | u64 reg = vcpu_sys_reg(vcpu, PMUSERENR_EL0); | |
460 | ||
461 | return !((reg & ARMV8_PMU_USERENR_EN) || vcpu_mode_priv(vcpu)); | |
462 | } | |
463 | ||
464 | static bool pmu_write_swinc_el0_disabled(struct kvm_vcpu *vcpu) | |
465 | { | |
466 | u64 reg = vcpu_sys_reg(vcpu, PMUSERENR_EL0); | |
467 | ||
468 | return !((reg & (ARMV8_PMU_USERENR_SW | ARMV8_PMU_USERENR_EN)) | |
469 | || vcpu_mode_priv(vcpu)); | |
470 | } | |
471 | ||
472 | static bool pmu_access_cycle_counter_el0_disabled(struct kvm_vcpu *vcpu) | |
473 | { | |
474 | u64 reg = vcpu_sys_reg(vcpu, PMUSERENR_EL0); | |
475 | ||
476 | return !((reg & (ARMV8_PMU_USERENR_CR | ARMV8_PMU_USERENR_EN)) | |
477 | || vcpu_mode_priv(vcpu)); | |
478 | } | |
479 | ||
480 | static bool pmu_access_event_counter_el0_disabled(struct kvm_vcpu *vcpu) | |
481 | { | |
482 | u64 reg = vcpu_sys_reg(vcpu, PMUSERENR_EL0); | |
483 | ||
484 | return !((reg & (ARMV8_PMU_USERENR_ER | ARMV8_PMU_USERENR_EN)) | |
485 | || vcpu_mode_priv(vcpu)); | |
486 | } | |
487 | ||
ab946834 SZ |
488 | static bool access_pmcr(struct kvm_vcpu *vcpu, struct sys_reg_params *p, |
489 | const struct sys_reg_desc *r) | |
490 | { | |
491 | u64 val; | |
492 | ||
493 | if (!kvm_arm_pmu_v3_ready(vcpu)) | |
494 | return trap_raz_wi(vcpu, p, r); | |
495 | ||
d692b8ad SZ |
496 | if (pmu_access_el0_disabled(vcpu)) |
497 | return false; | |
498 | ||
ab946834 SZ |
499 | if (p->is_write) { |
500 | /* Only update writeable bits of PMCR */ | |
501 | val = vcpu_sys_reg(vcpu, PMCR_EL0); | |
502 | val &= ~ARMV8_PMU_PMCR_MASK; | |
503 | val |= p->regval & ARMV8_PMU_PMCR_MASK; | |
504 | vcpu_sys_reg(vcpu, PMCR_EL0) = val; | |
76993739 | 505 | kvm_pmu_handle_pmcr(vcpu, val); |
ab946834 SZ |
506 | } else { |
507 | /* PMCR.P & PMCR.C are RAZ */ | |
508 | val = vcpu_sys_reg(vcpu, PMCR_EL0) | |
509 | & ~(ARMV8_PMU_PMCR_P | ARMV8_PMU_PMCR_C); | |
510 | p->regval = val; | |
511 | } | |
512 | ||
513 | return true; | |
514 | } | |
515 | ||
3965c3ce SZ |
516 | static bool access_pmselr(struct kvm_vcpu *vcpu, struct sys_reg_params *p, |
517 | const struct sys_reg_desc *r) | |
518 | { | |
519 | if (!kvm_arm_pmu_v3_ready(vcpu)) | |
520 | return trap_raz_wi(vcpu, p, r); | |
521 | ||
d692b8ad SZ |
522 | if (pmu_access_event_counter_el0_disabled(vcpu)) |
523 | return false; | |
524 | ||
3965c3ce SZ |
525 | if (p->is_write) |
526 | vcpu_sys_reg(vcpu, PMSELR_EL0) = p->regval; | |
527 | else | |
528 | /* return PMSELR.SEL field */ | |
529 | p->regval = vcpu_sys_reg(vcpu, PMSELR_EL0) | |
530 | & ARMV8_PMU_COUNTER_MASK; | |
531 | ||
532 | return true; | |
533 | } | |
534 | ||
a86b5505 SZ |
535 | static bool access_pmceid(struct kvm_vcpu *vcpu, struct sys_reg_params *p, |
536 | const struct sys_reg_desc *r) | |
537 | { | |
538 | u64 pmceid; | |
539 | ||
540 | if (!kvm_arm_pmu_v3_ready(vcpu)) | |
541 | return trap_raz_wi(vcpu, p, r); | |
542 | ||
543 | BUG_ON(p->is_write); | |
544 | ||
d692b8ad SZ |
545 | if (pmu_access_el0_disabled(vcpu)) |
546 | return false; | |
547 | ||
a86b5505 SZ |
548 | if (!(p->Op2 & 1)) |
549 | asm volatile("mrs %0, pmceid0_el0\n" : "=r" (pmceid)); | |
550 | else | |
551 | asm volatile("mrs %0, pmceid1_el0\n" : "=r" (pmceid)); | |
552 | ||
553 | p->regval = pmceid; | |
554 | ||
555 | return true; | |
556 | } | |
557 | ||
051ff581 SZ |
558 | static bool pmu_counter_idx_valid(struct kvm_vcpu *vcpu, u64 idx) |
559 | { | |
560 | u64 pmcr, val; | |
561 | ||
562 | pmcr = vcpu_sys_reg(vcpu, PMCR_EL0); | |
563 | val = (pmcr >> ARMV8_PMU_PMCR_N_SHIFT) & ARMV8_PMU_PMCR_N_MASK; | |
564 | if (idx >= val && idx != ARMV8_PMU_CYCLE_IDX) | |
565 | return false; | |
566 | ||
567 | return true; | |
568 | } | |
569 | ||
570 | static bool access_pmu_evcntr(struct kvm_vcpu *vcpu, | |
571 | struct sys_reg_params *p, | |
572 | const struct sys_reg_desc *r) | |
573 | { | |
574 | u64 idx; | |
575 | ||
576 | if (!kvm_arm_pmu_v3_ready(vcpu)) | |
577 | return trap_raz_wi(vcpu, p, r); | |
578 | ||
579 | if (r->CRn == 9 && r->CRm == 13) { | |
580 | if (r->Op2 == 2) { | |
581 | /* PMXEVCNTR_EL0 */ | |
d692b8ad SZ |
582 | if (pmu_access_event_counter_el0_disabled(vcpu)) |
583 | return false; | |
584 | ||
051ff581 SZ |
585 | idx = vcpu_sys_reg(vcpu, PMSELR_EL0) |
586 | & ARMV8_PMU_COUNTER_MASK; | |
587 | } else if (r->Op2 == 0) { | |
588 | /* PMCCNTR_EL0 */ | |
d692b8ad SZ |
589 | if (pmu_access_cycle_counter_el0_disabled(vcpu)) |
590 | return false; | |
591 | ||
051ff581 SZ |
592 | idx = ARMV8_PMU_CYCLE_IDX; |
593 | } else { | |
594 | BUG(); | |
595 | } | |
596 | } else if (r->CRn == 14 && (r->CRm & 12) == 8) { | |
597 | /* PMEVCNTRn_EL0 */ | |
d692b8ad SZ |
598 | if (pmu_access_event_counter_el0_disabled(vcpu)) |
599 | return false; | |
600 | ||
051ff581 SZ |
601 | idx = ((r->CRm & 3) << 3) | (r->Op2 & 7); |
602 | } else { | |
603 | BUG(); | |
604 | } | |
605 | ||
606 | if (!pmu_counter_idx_valid(vcpu, idx)) | |
607 | return false; | |
608 | ||
d692b8ad SZ |
609 | if (p->is_write) { |
610 | if (pmu_access_el0_disabled(vcpu)) | |
611 | return false; | |
612 | ||
051ff581 | 613 | kvm_pmu_set_counter_value(vcpu, idx, p->regval); |
d692b8ad | 614 | } else { |
051ff581 | 615 | p->regval = kvm_pmu_get_counter_value(vcpu, idx); |
d692b8ad | 616 | } |
051ff581 SZ |
617 | |
618 | return true; | |
619 | } | |
620 | ||
9feb21ac SZ |
621 | static bool access_pmu_evtyper(struct kvm_vcpu *vcpu, struct sys_reg_params *p, |
622 | const struct sys_reg_desc *r) | |
623 | { | |
624 | u64 idx, reg; | |
625 | ||
626 | if (!kvm_arm_pmu_v3_ready(vcpu)) | |
627 | return trap_raz_wi(vcpu, p, r); | |
628 | ||
d692b8ad SZ |
629 | if (pmu_access_el0_disabled(vcpu)) |
630 | return false; | |
631 | ||
9feb21ac SZ |
632 | if (r->CRn == 9 && r->CRm == 13 && r->Op2 == 1) { |
633 | /* PMXEVTYPER_EL0 */ | |
634 | idx = vcpu_sys_reg(vcpu, PMSELR_EL0) & ARMV8_PMU_COUNTER_MASK; | |
635 | reg = PMEVTYPER0_EL0 + idx; | |
636 | } else if (r->CRn == 14 && (r->CRm & 12) == 12) { | |
637 | idx = ((r->CRm & 3) << 3) | (r->Op2 & 7); | |
638 | if (idx == ARMV8_PMU_CYCLE_IDX) | |
639 | reg = PMCCFILTR_EL0; | |
640 | else | |
641 | /* PMEVTYPERn_EL0 */ | |
642 | reg = PMEVTYPER0_EL0 + idx; | |
643 | } else { | |
644 | BUG(); | |
645 | } | |
646 | ||
647 | if (!pmu_counter_idx_valid(vcpu, idx)) | |
648 | return false; | |
649 | ||
650 | if (p->is_write) { | |
651 | kvm_pmu_set_counter_event_type(vcpu, p->regval, idx); | |
652 | vcpu_sys_reg(vcpu, reg) = p->regval & ARMV8_PMU_EVTYPE_MASK; | |
653 | } else { | |
654 | p->regval = vcpu_sys_reg(vcpu, reg) & ARMV8_PMU_EVTYPE_MASK; | |
655 | } | |
656 | ||
657 | return true; | |
658 | } | |
659 | ||
96b0eebc SZ |
660 | static bool access_pmcnten(struct kvm_vcpu *vcpu, struct sys_reg_params *p, |
661 | const struct sys_reg_desc *r) | |
662 | { | |
663 | u64 val, mask; | |
664 | ||
665 | if (!kvm_arm_pmu_v3_ready(vcpu)) | |
666 | return trap_raz_wi(vcpu, p, r); | |
667 | ||
d692b8ad SZ |
668 | if (pmu_access_el0_disabled(vcpu)) |
669 | return false; | |
670 | ||
96b0eebc SZ |
671 | mask = kvm_pmu_valid_counter_mask(vcpu); |
672 | if (p->is_write) { | |
673 | val = p->regval & mask; | |
674 | if (r->Op2 & 0x1) { | |
675 | /* accessing PMCNTENSET_EL0 */ | |
676 | vcpu_sys_reg(vcpu, PMCNTENSET_EL0) |= val; | |
677 | kvm_pmu_enable_counter(vcpu, val); | |
678 | } else { | |
679 | /* accessing PMCNTENCLR_EL0 */ | |
680 | vcpu_sys_reg(vcpu, PMCNTENSET_EL0) &= ~val; | |
681 | kvm_pmu_disable_counter(vcpu, val); | |
682 | } | |
683 | } else { | |
684 | p->regval = vcpu_sys_reg(vcpu, PMCNTENSET_EL0) & mask; | |
685 | } | |
686 | ||
687 | return true; | |
688 | } | |
689 | ||
9db52c78 SZ |
690 | static bool access_pminten(struct kvm_vcpu *vcpu, struct sys_reg_params *p, |
691 | const struct sys_reg_desc *r) | |
692 | { | |
693 | u64 mask = kvm_pmu_valid_counter_mask(vcpu); | |
694 | ||
695 | if (!kvm_arm_pmu_v3_ready(vcpu)) | |
696 | return trap_raz_wi(vcpu, p, r); | |
697 | ||
d692b8ad SZ |
698 | if (!vcpu_mode_priv(vcpu)) |
699 | return false; | |
700 | ||
9db52c78 SZ |
701 | if (p->is_write) { |
702 | u64 val = p->regval & mask; | |
703 | ||
704 | if (r->Op2 & 0x1) | |
705 | /* accessing PMINTENSET_EL1 */ | |
706 | vcpu_sys_reg(vcpu, PMINTENSET_EL1) |= val; | |
707 | else | |
708 | /* accessing PMINTENCLR_EL1 */ | |
709 | vcpu_sys_reg(vcpu, PMINTENSET_EL1) &= ~val; | |
710 | } else { | |
711 | p->regval = vcpu_sys_reg(vcpu, PMINTENSET_EL1) & mask; | |
712 | } | |
713 | ||
714 | return true; | |
715 | } | |
716 | ||
76d883c4 SZ |
717 | static bool access_pmovs(struct kvm_vcpu *vcpu, struct sys_reg_params *p, |
718 | const struct sys_reg_desc *r) | |
719 | { | |
720 | u64 mask = kvm_pmu_valid_counter_mask(vcpu); | |
721 | ||
722 | if (!kvm_arm_pmu_v3_ready(vcpu)) | |
723 | return trap_raz_wi(vcpu, p, r); | |
724 | ||
d692b8ad SZ |
725 | if (pmu_access_el0_disabled(vcpu)) |
726 | return false; | |
727 | ||
76d883c4 SZ |
728 | if (p->is_write) { |
729 | if (r->CRm & 0x2) | |
730 | /* accessing PMOVSSET_EL0 */ | |
731 | kvm_pmu_overflow_set(vcpu, p->regval & mask); | |
732 | else | |
733 | /* accessing PMOVSCLR_EL0 */ | |
734 | vcpu_sys_reg(vcpu, PMOVSSET_EL0) &= ~(p->regval & mask); | |
735 | } else { | |
736 | p->regval = vcpu_sys_reg(vcpu, PMOVSSET_EL0) & mask; | |
737 | } | |
738 | ||
739 | return true; | |
740 | } | |
741 | ||
7a0adc70 SZ |
742 | static bool access_pmswinc(struct kvm_vcpu *vcpu, struct sys_reg_params *p, |
743 | const struct sys_reg_desc *r) | |
744 | { | |
745 | u64 mask; | |
746 | ||
747 | if (!kvm_arm_pmu_v3_ready(vcpu)) | |
748 | return trap_raz_wi(vcpu, p, r); | |
749 | ||
d692b8ad SZ |
750 | if (pmu_write_swinc_el0_disabled(vcpu)) |
751 | return false; | |
752 | ||
7a0adc70 SZ |
753 | if (p->is_write) { |
754 | mask = kvm_pmu_valid_counter_mask(vcpu); | |
755 | kvm_pmu_software_increment(vcpu, p->regval & mask); | |
756 | return true; | |
757 | } | |
758 | ||
759 | return false; | |
760 | } | |
761 | ||
d692b8ad SZ |
762 | static bool access_pmuserenr(struct kvm_vcpu *vcpu, struct sys_reg_params *p, |
763 | const struct sys_reg_desc *r) | |
764 | { | |
765 | if (!kvm_arm_pmu_v3_ready(vcpu)) | |
766 | return trap_raz_wi(vcpu, p, r); | |
767 | ||
768 | if (p->is_write) { | |
769 | if (!vcpu_mode_priv(vcpu)) | |
770 | return false; | |
771 | ||
772 | vcpu_sys_reg(vcpu, PMUSERENR_EL0) = p->regval | |
773 | & ARMV8_PMU_USERENR_MASK; | |
774 | } else { | |
775 | p->regval = vcpu_sys_reg(vcpu, PMUSERENR_EL0) | |
776 | & ARMV8_PMU_USERENR_MASK; | |
777 | } | |
778 | ||
779 | return true; | |
780 | } | |
781 | ||
0c557ed4 MZ |
782 | /* Silly macro to expand the DBG{BCR,BVR,WVR,WCR}n_EL1 registers in one go */ |
783 | #define DBG_BCR_BVR_WCR_WVR_EL1(n) \ | |
784 | /* DBGBVRn_EL1 */ \ | |
785 | { Op0(0b10), Op1(0b000), CRn(0b0000), CRm((n)), Op2(0b100), \ | |
84e690bf | 786 | trap_bvr, reset_bvr, n, 0, get_bvr, set_bvr }, \ |
0c557ed4 MZ |
787 | /* DBGBCRn_EL1 */ \ |
788 | { Op0(0b10), Op1(0b000), CRn(0b0000), CRm((n)), Op2(0b101), \ | |
84e690bf | 789 | trap_bcr, reset_bcr, n, 0, get_bcr, set_bcr }, \ |
0c557ed4 MZ |
790 | /* DBGWVRn_EL1 */ \ |
791 | { Op0(0b10), Op1(0b000), CRn(0b0000), CRm((n)), Op2(0b110), \ | |
84e690bf | 792 | trap_wvr, reset_wvr, n, 0, get_wvr, set_wvr }, \ |
0c557ed4 MZ |
793 | /* DBGWCRn_EL1 */ \ |
794 | { Op0(0b10), Op1(0b000), CRn(0b0000), CRm((n)), Op2(0b111), \ | |
84e690bf | 795 | trap_wcr, reset_wcr, n, 0, get_wcr, set_wcr } |
0c557ed4 | 796 | |
051ff581 SZ |
797 | /* Macro to expand the PMEVCNTRn_EL0 register */ |
798 | #define PMU_PMEVCNTR_EL0(n) \ | |
799 | /* PMEVCNTRn_EL0 */ \ | |
800 | { Op0(0b11), Op1(0b011), CRn(0b1110), \ | |
801 | CRm((0b1000 | (((n) >> 3) & 0x3))), Op2(((n) & 0x7)), \ | |
802 | access_pmu_evcntr, reset_unknown, (PMEVCNTR0_EL0 + n), } | |
803 | ||
9feb21ac SZ |
804 | /* Macro to expand the PMEVTYPERn_EL0 register */ |
805 | #define PMU_PMEVTYPER_EL0(n) \ | |
806 | /* PMEVTYPERn_EL0 */ \ | |
807 | { Op0(0b11), Op1(0b011), CRn(0b1110), \ | |
808 | CRm((0b1100 | (((n) >> 3) & 0x3))), Op2(((n) & 0x7)), \ | |
809 | access_pmu_evtyper, reset_unknown, (PMEVTYPER0_EL0 + n), } | |
810 | ||
7c8c5e6a MZ |
811 | /* |
812 | * Architected system registers. | |
813 | * Important: Must be sorted ascending by Op0, Op1, CRn, CRm, Op2 | |
7609c125 MZ |
814 | * |
815 | * We could trap ID_DFR0 and tell the guest we don't support performance | |
816 | * monitoring. Unfortunately the patch to make the kernel check ID_DFR0 was | |
817 | * NAKed, so it will read the PMCR anyway. | |
818 | * | |
819 | * Therefore we tell the guest we have 0 counters. Unfortunately, we | |
820 | * must always support PMCCNTR (the cycle counter): we just RAZ/WI for | |
821 | * all PM registers, which doesn't crash the guest kernel at least. | |
822 | * | |
0c557ed4 MZ |
823 | * Debug handling: We do trap most, if not all debug related system |
824 | * registers. The implementation is good enough to ensure that a guest | |
825 | * can use these with minimal performance degradation. The drawback is | |
826 | * that we don't implement any of the external debug, none of the | |
827 | * OSlock protocol. This should be revisited if we ever encounter a | |
828 | * more demanding guest... | |
7c8c5e6a MZ |
829 | */ |
830 | static const struct sys_reg_desc sys_reg_descs[] = { | |
831 | /* DC ISW */ | |
832 | { Op0(0b01), Op1(0b000), CRn(0b0111), CRm(0b0110), Op2(0b010), | |
833 | access_dcsw }, | |
834 | /* DC CSW */ | |
835 | { Op0(0b01), Op1(0b000), CRn(0b0111), CRm(0b1010), Op2(0b010), | |
836 | access_dcsw }, | |
837 | /* DC CISW */ | |
838 | { Op0(0b01), Op1(0b000), CRn(0b0111), CRm(0b1110), Op2(0b010), | |
839 | access_dcsw }, | |
840 | ||
0c557ed4 MZ |
841 | DBG_BCR_BVR_WCR_WVR_EL1(0), |
842 | DBG_BCR_BVR_WCR_WVR_EL1(1), | |
843 | /* MDCCINT_EL1 */ | |
844 | { Op0(0b10), Op1(0b000), CRn(0b0000), CRm(0b0010), Op2(0b000), | |
845 | trap_debug_regs, reset_val, MDCCINT_EL1, 0 }, | |
846 | /* MDSCR_EL1 */ | |
847 | { Op0(0b10), Op1(0b000), CRn(0b0000), CRm(0b0010), Op2(0b010), | |
848 | trap_debug_regs, reset_val, MDSCR_EL1, 0 }, | |
849 | DBG_BCR_BVR_WCR_WVR_EL1(2), | |
850 | DBG_BCR_BVR_WCR_WVR_EL1(3), | |
851 | DBG_BCR_BVR_WCR_WVR_EL1(4), | |
852 | DBG_BCR_BVR_WCR_WVR_EL1(5), | |
853 | DBG_BCR_BVR_WCR_WVR_EL1(6), | |
854 | DBG_BCR_BVR_WCR_WVR_EL1(7), | |
855 | DBG_BCR_BVR_WCR_WVR_EL1(8), | |
856 | DBG_BCR_BVR_WCR_WVR_EL1(9), | |
857 | DBG_BCR_BVR_WCR_WVR_EL1(10), | |
858 | DBG_BCR_BVR_WCR_WVR_EL1(11), | |
859 | DBG_BCR_BVR_WCR_WVR_EL1(12), | |
860 | DBG_BCR_BVR_WCR_WVR_EL1(13), | |
861 | DBG_BCR_BVR_WCR_WVR_EL1(14), | |
862 | DBG_BCR_BVR_WCR_WVR_EL1(15), | |
863 | ||
864 | /* MDRAR_EL1 */ | |
865 | { Op0(0b10), Op1(0b000), CRn(0b0001), CRm(0b0000), Op2(0b000), | |
866 | trap_raz_wi }, | |
867 | /* OSLAR_EL1 */ | |
868 | { Op0(0b10), Op1(0b000), CRn(0b0001), CRm(0b0000), Op2(0b100), | |
869 | trap_raz_wi }, | |
870 | /* OSLSR_EL1 */ | |
871 | { Op0(0b10), Op1(0b000), CRn(0b0001), CRm(0b0001), Op2(0b100), | |
872 | trap_oslsr_el1 }, | |
873 | /* OSDLR_EL1 */ | |
874 | { Op0(0b10), Op1(0b000), CRn(0b0001), CRm(0b0011), Op2(0b100), | |
875 | trap_raz_wi }, | |
876 | /* DBGPRCR_EL1 */ | |
877 | { Op0(0b10), Op1(0b000), CRn(0b0001), CRm(0b0100), Op2(0b100), | |
878 | trap_raz_wi }, | |
879 | /* DBGCLAIMSET_EL1 */ | |
880 | { Op0(0b10), Op1(0b000), CRn(0b0111), CRm(0b1000), Op2(0b110), | |
881 | trap_raz_wi }, | |
882 | /* DBGCLAIMCLR_EL1 */ | |
883 | { Op0(0b10), Op1(0b000), CRn(0b0111), CRm(0b1001), Op2(0b110), | |
884 | trap_raz_wi }, | |
885 | /* DBGAUTHSTATUS_EL1 */ | |
886 | { Op0(0b10), Op1(0b000), CRn(0b0111), CRm(0b1110), Op2(0b110), | |
887 | trap_dbgauthstatus_el1 }, | |
888 | ||
0c557ed4 MZ |
889 | /* MDCCSR_EL1 */ |
890 | { Op0(0b10), Op1(0b011), CRn(0b0000), CRm(0b0001), Op2(0b000), | |
891 | trap_raz_wi }, | |
892 | /* DBGDTR_EL0 */ | |
893 | { Op0(0b10), Op1(0b011), CRn(0b0000), CRm(0b0100), Op2(0b000), | |
894 | trap_raz_wi }, | |
895 | /* DBGDTR[TR]X_EL0 */ | |
896 | { Op0(0b10), Op1(0b011), CRn(0b0000), CRm(0b0101), Op2(0b000), | |
897 | trap_raz_wi }, | |
898 | ||
62a89c44 MZ |
899 | /* DBGVCR32_EL2 */ |
900 | { Op0(0b10), Op1(0b100), CRn(0b0000), CRm(0b0111), Op2(0b000), | |
901 | NULL, reset_val, DBGVCR32_EL2, 0 }, | |
902 | ||
7c8c5e6a MZ |
903 | /* MPIDR_EL1 */ |
904 | { Op0(0b11), Op1(0b000), CRn(0b0000), CRm(0b0000), Op2(0b101), | |
905 | NULL, reset_mpidr, MPIDR_EL1 }, | |
906 | /* SCTLR_EL1 */ | |
907 | { Op0(0b11), Op1(0b000), CRn(0b0001), CRm(0b0000), Op2(0b000), | |
3c1e7165 | 908 | access_vm_reg, reset_val, SCTLR_EL1, 0x00C50078 }, |
7c8c5e6a MZ |
909 | /* CPACR_EL1 */ |
910 | { Op0(0b11), Op1(0b000), CRn(0b0001), CRm(0b0000), Op2(0b010), | |
911 | NULL, reset_val, CPACR_EL1, 0 }, | |
912 | /* TTBR0_EL1 */ | |
913 | { Op0(0b11), Op1(0b000), CRn(0b0010), CRm(0b0000), Op2(0b000), | |
4d44923b | 914 | access_vm_reg, reset_unknown, TTBR0_EL1 }, |
7c8c5e6a MZ |
915 | /* TTBR1_EL1 */ |
916 | { Op0(0b11), Op1(0b000), CRn(0b0010), CRm(0b0000), Op2(0b001), | |
4d44923b | 917 | access_vm_reg, reset_unknown, TTBR1_EL1 }, |
7c8c5e6a MZ |
918 | /* TCR_EL1 */ |
919 | { Op0(0b11), Op1(0b000), CRn(0b0010), CRm(0b0000), Op2(0b010), | |
4d44923b | 920 | access_vm_reg, reset_val, TCR_EL1, 0 }, |
7c8c5e6a MZ |
921 | |
922 | /* AFSR0_EL1 */ | |
923 | { Op0(0b11), Op1(0b000), CRn(0b0101), CRm(0b0001), Op2(0b000), | |
4d44923b | 924 | access_vm_reg, reset_unknown, AFSR0_EL1 }, |
7c8c5e6a MZ |
925 | /* AFSR1_EL1 */ |
926 | { Op0(0b11), Op1(0b000), CRn(0b0101), CRm(0b0001), Op2(0b001), | |
4d44923b | 927 | access_vm_reg, reset_unknown, AFSR1_EL1 }, |
7c8c5e6a MZ |
928 | /* ESR_EL1 */ |
929 | { Op0(0b11), Op1(0b000), CRn(0b0101), CRm(0b0010), Op2(0b000), | |
4d44923b | 930 | access_vm_reg, reset_unknown, ESR_EL1 }, |
7c8c5e6a MZ |
931 | /* FAR_EL1 */ |
932 | { Op0(0b11), Op1(0b000), CRn(0b0110), CRm(0b0000), Op2(0b000), | |
4d44923b | 933 | access_vm_reg, reset_unknown, FAR_EL1 }, |
1bbd8054 MZ |
934 | /* PAR_EL1 */ |
935 | { Op0(0b11), Op1(0b000), CRn(0b0111), CRm(0b0100), Op2(0b000), | |
936 | NULL, reset_unknown, PAR_EL1 }, | |
7c8c5e6a MZ |
937 | |
938 | /* PMINTENSET_EL1 */ | |
939 | { Op0(0b11), Op1(0b000), CRn(0b1001), CRm(0b1110), Op2(0b001), | |
9db52c78 | 940 | access_pminten, reset_unknown, PMINTENSET_EL1 }, |
7c8c5e6a MZ |
941 | /* PMINTENCLR_EL1 */ |
942 | { Op0(0b11), Op1(0b000), CRn(0b1001), CRm(0b1110), Op2(0b010), | |
9db52c78 | 943 | access_pminten, NULL, PMINTENSET_EL1 }, |
7c8c5e6a MZ |
944 | |
945 | /* MAIR_EL1 */ | |
946 | { Op0(0b11), Op1(0b000), CRn(0b1010), CRm(0b0010), Op2(0b000), | |
4d44923b | 947 | access_vm_reg, reset_unknown, MAIR_EL1 }, |
7c8c5e6a MZ |
948 | /* AMAIR_EL1 */ |
949 | { Op0(0b11), Op1(0b000), CRn(0b1010), CRm(0b0011), Op2(0b000), | |
4d44923b | 950 | access_vm_reg, reset_amair_el1, AMAIR_EL1 }, |
7c8c5e6a MZ |
951 | |
952 | /* VBAR_EL1 */ | |
953 | { Op0(0b11), Op1(0b000), CRn(0b1100), CRm(0b0000), Op2(0b000), | |
954 | NULL, reset_val, VBAR_EL1, 0 }, | |
db7dedd0 | 955 | |
6d52f35a AP |
956 | /* ICC_SGI1R_EL1 */ |
957 | { Op0(0b11), Op1(0b000), CRn(0b1100), CRm(0b1011), Op2(0b101), | |
958 | access_gic_sgi }, | |
db7dedd0 CD |
959 | /* ICC_SRE_EL1 */ |
960 | { Op0(0b11), Op1(0b000), CRn(0b1100), CRm(0b1100), Op2(0b101), | |
961 | trap_raz_wi }, | |
962 | ||
7c8c5e6a MZ |
963 | /* CONTEXTIDR_EL1 */ |
964 | { Op0(0b11), Op1(0b000), CRn(0b1101), CRm(0b0000), Op2(0b001), | |
4d44923b | 965 | access_vm_reg, reset_val, CONTEXTIDR_EL1, 0 }, |
7c8c5e6a MZ |
966 | /* TPIDR_EL1 */ |
967 | { Op0(0b11), Op1(0b000), CRn(0b1101), CRm(0b0000), Op2(0b100), | |
968 | NULL, reset_unknown, TPIDR_EL1 }, | |
969 | ||
970 | /* CNTKCTL_EL1 */ | |
971 | { Op0(0b11), Op1(0b000), CRn(0b1110), CRm(0b0001), Op2(0b000), | |
972 | NULL, reset_val, CNTKCTL_EL1, 0}, | |
973 | ||
974 | /* CSSELR_EL1 */ | |
975 | { Op0(0b11), Op1(0b010), CRn(0b0000), CRm(0b0000), Op2(0b000), | |
976 | NULL, reset_unknown, CSSELR_EL1 }, | |
977 | ||
978 | /* PMCR_EL0 */ | |
979 | { Op0(0b11), Op1(0b011), CRn(0b1001), CRm(0b1100), Op2(0b000), | |
ab946834 | 980 | access_pmcr, reset_pmcr, }, |
7c8c5e6a MZ |
981 | /* PMCNTENSET_EL0 */ |
982 | { Op0(0b11), Op1(0b011), CRn(0b1001), CRm(0b1100), Op2(0b001), | |
96b0eebc | 983 | access_pmcnten, reset_unknown, PMCNTENSET_EL0 }, |
7c8c5e6a MZ |
984 | /* PMCNTENCLR_EL0 */ |
985 | { Op0(0b11), Op1(0b011), CRn(0b1001), CRm(0b1100), Op2(0b010), | |
96b0eebc | 986 | access_pmcnten, NULL, PMCNTENSET_EL0 }, |
7c8c5e6a MZ |
987 | /* PMOVSCLR_EL0 */ |
988 | { Op0(0b11), Op1(0b011), CRn(0b1001), CRm(0b1100), Op2(0b011), | |
76d883c4 | 989 | access_pmovs, NULL, PMOVSSET_EL0 }, |
7c8c5e6a MZ |
990 | /* PMSWINC_EL0 */ |
991 | { Op0(0b11), Op1(0b011), CRn(0b1001), CRm(0b1100), Op2(0b100), | |
7a0adc70 | 992 | access_pmswinc, reset_unknown, PMSWINC_EL0 }, |
7c8c5e6a MZ |
993 | /* PMSELR_EL0 */ |
994 | { Op0(0b11), Op1(0b011), CRn(0b1001), CRm(0b1100), Op2(0b101), | |
3965c3ce | 995 | access_pmselr, reset_unknown, PMSELR_EL0 }, |
7c8c5e6a MZ |
996 | /* PMCEID0_EL0 */ |
997 | { Op0(0b11), Op1(0b011), CRn(0b1001), CRm(0b1100), Op2(0b110), | |
a86b5505 | 998 | access_pmceid }, |
7c8c5e6a MZ |
999 | /* PMCEID1_EL0 */ |
1000 | { Op0(0b11), Op1(0b011), CRn(0b1001), CRm(0b1100), Op2(0b111), | |
a86b5505 | 1001 | access_pmceid }, |
7c8c5e6a MZ |
1002 | /* PMCCNTR_EL0 */ |
1003 | { Op0(0b11), Op1(0b011), CRn(0b1001), CRm(0b1101), Op2(0b000), | |
051ff581 | 1004 | access_pmu_evcntr, reset_unknown, PMCCNTR_EL0 }, |
7c8c5e6a MZ |
1005 | /* PMXEVTYPER_EL0 */ |
1006 | { Op0(0b11), Op1(0b011), CRn(0b1001), CRm(0b1101), Op2(0b001), | |
9feb21ac | 1007 | access_pmu_evtyper }, |
7c8c5e6a MZ |
1008 | /* PMXEVCNTR_EL0 */ |
1009 | { Op0(0b11), Op1(0b011), CRn(0b1001), CRm(0b1101), Op2(0b010), | |
051ff581 | 1010 | access_pmu_evcntr }, |
d692b8ad SZ |
1011 | /* PMUSERENR_EL0 |
1012 | * This register resets as unknown in 64bit mode while it resets as zero | |
1013 | * in 32bit mode. Here we choose to reset it as zero for consistency. | |
1014 | */ | |
7c8c5e6a | 1015 | { Op0(0b11), Op1(0b011), CRn(0b1001), CRm(0b1110), Op2(0b000), |
d692b8ad | 1016 | access_pmuserenr, reset_val, PMUSERENR_EL0, 0 }, |
7c8c5e6a MZ |
1017 | /* PMOVSSET_EL0 */ |
1018 | { Op0(0b11), Op1(0b011), CRn(0b1001), CRm(0b1110), Op2(0b011), | |
76d883c4 | 1019 | access_pmovs, reset_unknown, PMOVSSET_EL0 }, |
7c8c5e6a MZ |
1020 | |
1021 | /* TPIDR_EL0 */ | |
1022 | { Op0(0b11), Op1(0b011), CRn(0b1101), CRm(0b0000), Op2(0b010), | |
1023 | NULL, reset_unknown, TPIDR_EL0 }, | |
1024 | /* TPIDRRO_EL0 */ | |
1025 | { Op0(0b11), Op1(0b011), CRn(0b1101), CRm(0b0000), Op2(0b011), | |
1026 | NULL, reset_unknown, TPIDRRO_EL0 }, | |
62a89c44 | 1027 | |
051ff581 SZ |
1028 | /* PMEVCNTRn_EL0 */ |
1029 | PMU_PMEVCNTR_EL0(0), | |
1030 | PMU_PMEVCNTR_EL0(1), | |
1031 | PMU_PMEVCNTR_EL0(2), | |
1032 | PMU_PMEVCNTR_EL0(3), | |
1033 | PMU_PMEVCNTR_EL0(4), | |
1034 | PMU_PMEVCNTR_EL0(5), | |
1035 | PMU_PMEVCNTR_EL0(6), | |
1036 | PMU_PMEVCNTR_EL0(7), | |
1037 | PMU_PMEVCNTR_EL0(8), | |
1038 | PMU_PMEVCNTR_EL0(9), | |
1039 | PMU_PMEVCNTR_EL0(10), | |
1040 | PMU_PMEVCNTR_EL0(11), | |
1041 | PMU_PMEVCNTR_EL0(12), | |
1042 | PMU_PMEVCNTR_EL0(13), | |
1043 | PMU_PMEVCNTR_EL0(14), | |
1044 | PMU_PMEVCNTR_EL0(15), | |
1045 | PMU_PMEVCNTR_EL0(16), | |
1046 | PMU_PMEVCNTR_EL0(17), | |
1047 | PMU_PMEVCNTR_EL0(18), | |
1048 | PMU_PMEVCNTR_EL0(19), | |
1049 | PMU_PMEVCNTR_EL0(20), | |
1050 | PMU_PMEVCNTR_EL0(21), | |
1051 | PMU_PMEVCNTR_EL0(22), | |
1052 | PMU_PMEVCNTR_EL0(23), | |
1053 | PMU_PMEVCNTR_EL0(24), | |
1054 | PMU_PMEVCNTR_EL0(25), | |
1055 | PMU_PMEVCNTR_EL0(26), | |
1056 | PMU_PMEVCNTR_EL0(27), | |
1057 | PMU_PMEVCNTR_EL0(28), | |
1058 | PMU_PMEVCNTR_EL0(29), | |
1059 | PMU_PMEVCNTR_EL0(30), | |
9feb21ac SZ |
1060 | /* PMEVTYPERn_EL0 */ |
1061 | PMU_PMEVTYPER_EL0(0), | |
1062 | PMU_PMEVTYPER_EL0(1), | |
1063 | PMU_PMEVTYPER_EL0(2), | |
1064 | PMU_PMEVTYPER_EL0(3), | |
1065 | PMU_PMEVTYPER_EL0(4), | |
1066 | PMU_PMEVTYPER_EL0(5), | |
1067 | PMU_PMEVTYPER_EL0(6), | |
1068 | PMU_PMEVTYPER_EL0(7), | |
1069 | PMU_PMEVTYPER_EL0(8), | |
1070 | PMU_PMEVTYPER_EL0(9), | |
1071 | PMU_PMEVTYPER_EL0(10), | |
1072 | PMU_PMEVTYPER_EL0(11), | |
1073 | PMU_PMEVTYPER_EL0(12), | |
1074 | PMU_PMEVTYPER_EL0(13), | |
1075 | PMU_PMEVTYPER_EL0(14), | |
1076 | PMU_PMEVTYPER_EL0(15), | |
1077 | PMU_PMEVTYPER_EL0(16), | |
1078 | PMU_PMEVTYPER_EL0(17), | |
1079 | PMU_PMEVTYPER_EL0(18), | |
1080 | PMU_PMEVTYPER_EL0(19), | |
1081 | PMU_PMEVTYPER_EL0(20), | |
1082 | PMU_PMEVTYPER_EL0(21), | |
1083 | PMU_PMEVTYPER_EL0(22), | |
1084 | PMU_PMEVTYPER_EL0(23), | |
1085 | PMU_PMEVTYPER_EL0(24), | |
1086 | PMU_PMEVTYPER_EL0(25), | |
1087 | PMU_PMEVTYPER_EL0(26), | |
1088 | PMU_PMEVTYPER_EL0(27), | |
1089 | PMU_PMEVTYPER_EL0(28), | |
1090 | PMU_PMEVTYPER_EL0(29), | |
1091 | PMU_PMEVTYPER_EL0(30), | |
1092 | /* PMCCFILTR_EL0 | |
1093 | * This register resets as unknown in 64bit mode while it resets as zero | |
1094 | * in 32bit mode. Here we choose to reset it as zero for consistency. | |
1095 | */ | |
1096 | { Op0(0b11), Op1(0b011), CRn(0b1110), CRm(0b1111), Op2(0b111), | |
1097 | access_pmu_evtyper, reset_val, PMCCFILTR_EL0, 0 }, | |
051ff581 | 1098 | |
62a89c44 MZ |
1099 | /* DACR32_EL2 */ |
1100 | { Op0(0b11), Op1(0b100), CRn(0b0011), CRm(0b0000), Op2(0b000), | |
1101 | NULL, reset_unknown, DACR32_EL2 }, | |
1102 | /* IFSR32_EL2 */ | |
1103 | { Op0(0b11), Op1(0b100), CRn(0b0101), CRm(0b0000), Op2(0b001), | |
1104 | NULL, reset_unknown, IFSR32_EL2 }, | |
1105 | /* FPEXC32_EL2 */ | |
1106 | { Op0(0b11), Op1(0b100), CRn(0b0101), CRm(0b0011), Op2(0b000), | |
1107 | NULL, reset_val, FPEXC32_EL2, 0x70 }, | |
1108 | }; | |
1109 | ||
bdfb4b38 | 1110 | static bool trap_dbgidr(struct kvm_vcpu *vcpu, |
3fec037d | 1111 | struct sys_reg_params *p, |
bdfb4b38 MZ |
1112 | const struct sys_reg_desc *r) |
1113 | { | |
1114 | if (p->is_write) { | |
1115 | return ignore_write(vcpu, p); | |
1116 | } else { | |
4db8e5ea SP |
1117 | u64 dfr = read_system_reg(SYS_ID_AA64DFR0_EL1); |
1118 | u64 pfr = read_system_reg(SYS_ID_AA64PFR0_EL1); | |
28c5dcb2 | 1119 | u32 el3 = !!cpuid_feature_extract_unsigned_field(pfr, ID_AA64PFR0_EL3_SHIFT); |
bdfb4b38 | 1120 | |
2ec5be3d PF |
1121 | p->regval = ((((dfr >> ID_AA64DFR0_WRPS_SHIFT) & 0xf) << 28) | |
1122 | (((dfr >> ID_AA64DFR0_BRPS_SHIFT) & 0xf) << 24) | | |
1123 | (((dfr >> ID_AA64DFR0_CTX_CMPS_SHIFT) & 0xf) << 20) | |
1124 | | (6 << 16) | (el3 << 14) | (el3 << 12)); | |
bdfb4b38 MZ |
1125 | return true; |
1126 | } | |
1127 | } | |
1128 | ||
1129 | static bool trap_debug32(struct kvm_vcpu *vcpu, | |
3fec037d | 1130 | struct sys_reg_params *p, |
bdfb4b38 MZ |
1131 | const struct sys_reg_desc *r) |
1132 | { | |
1133 | if (p->is_write) { | |
2ec5be3d | 1134 | vcpu_cp14(vcpu, r->reg) = p->regval; |
bdfb4b38 MZ |
1135 | vcpu->arch.debug_flags |= KVM_ARM64_DEBUG_DIRTY; |
1136 | } else { | |
2ec5be3d | 1137 | p->regval = vcpu_cp14(vcpu, r->reg); |
bdfb4b38 MZ |
1138 | } |
1139 | ||
1140 | return true; | |
1141 | } | |
1142 | ||
84e690bf AB |
1143 | /* AArch32 debug register mappings |
1144 | * | |
1145 | * AArch32 DBGBVRn is mapped to DBGBVRn_EL1[31:0] | |
1146 | * AArch32 DBGBXVRn is mapped to DBGBVRn_EL1[63:32] | |
1147 | * | |
1148 | * All control registers and watchpoint value registers are mapped to | |
1149 | * the lower 32 bits of their AArch64 equivalents. We share the trap | |
1150 | * handlers with the above AArch64 code which checks what mode the | |
1151 | * system is in. | |
1152 | */ | |
1153 | ||
281243cb MZ |
1154 | static bool trap_xvr(struct kvm_vcpu *vcpu, |
1155 | struct sys_reg_params *p, | |
1156 | const struct sys_reg_desc *rd) | |
84e690bf AB |
1157 | { |
1158 | u64 *dbg_reg = &vcpu->arch.vcpu_debug_state.dbg_bvr[rd->reg]; | |
1159 | ||
1160 | if (p->is_write) { | |
1161 | u64 val = *dbg_reg; | |
1162 | ||
1163 | val &= 0xffffffffUL; | |
2ec5be3d | 1164 | val |= p->regval << 32; |
84e690bf AB |
1165 | *dbg_reg = val; |
1166 | ||
1167 | vcpu->arch.debug_flags |= KVM_ARM64_DEBUG_DIRTY; | |
1168 | } else { | |
2ec5be3d | 1169 | p->regval = *dbg_reg >> 32; |
84e690bf AB |
1170 | } |
1171 | ||
eef8c85a AB |
1172 | trace_trap_reg(__func__, rd->reg, p->is_write, *dbg_reg); |
1173 | ||
84e690bf AB |
1174 | return true; |
1175 | } | |
1176 | ||
1177 | #define DBG_BCR_BVR_WCR_WVR(n) \ | |
1178 | /* DBGBVRn */ \ | |
1179 | { Op1( 0), CRn( 0), CRm((n)), Op2( 4), trap_bvr, NULL, n }, \ | |
1180 | /* DBGBCRn */ \ | |
1181 | { Op1( 0), CRn( 0), CRm((n)), Op2( 5), trap_bcr, NULL, n }, \ | |
1182 | /* DBGWVRn */ \ | |
1183 | { Op1( 0), CRn( 0), CRm((n)), Op2( 6), trap_wvr, NULL, n }, \ | |
1184 | /* DBGWCRn */ \ | |
1185 | { Op1( 0), CRn( 0), CRm((n)), Op2( 7), trap_wcr, NULL, n } | |
1186 | ||
1187 | #define DBGBXVR(n) \ | |
1188 | { Op1( 0), CRn( 1), CRm((n)), Op2( 1), trap_xvr, NULL, n } | |
bdfb4b38 MZ |
1189 | |
1190 | /* | |
1191 | * Trapped cp14 registers. We generally ignore most of the external | |
1192 | * debug, on the principle that they don't really make sense to a | |
84e690bf | 1193 | * guest. Revisit this one day, would this principle change. |
bdfb4b38 | 1194 | */ |
72564016 | 1195 | static const struct sys_reg_desc cp14_regs[] = { |
bdfb4b38 MZ |
1196 | /* DBGIDR */ |
1197 | { Op1( 0), CRn( 0), CRm( 0), Op2( 0), trap_dbgidr }, | |
1198 | /* DBGDTRRXext */ | |
1199 | { Op1( 0), CRn( 0), CRm( 0), Op2( 2), trap_raz_wi }, | |
1200 | ||
1201 | DBG_BCR_BVR_WCR_WVR(0), | |
1202 | /* DBGDSCRint */ | |
1203 | { Op1( 0), CRn( 0), CRm( 1), Op2( 0), trap_raz_wi }, | |
1204 | DBG_BCR_BVR_WCR_WVR(1), | |
1205 | /* DBGDCCINT */ | |
1206 | { Op1( 0), CRn( 0), CRm( 2), Op2( 0), trap_debug32 }, | |
1207 | /* DBGDSCRext */ | |
1208 | { Op1( 0), CRn( 0), CRm( 2), Op2( 2), trap_debug32 }, | |
1209 | DBG_BCR_BVR_WCR_WVR(2), | |
1210 | /* DBGDTR[RT]Xint */ | |
1211 | { Op1( 0), CRn( 0), CRm( 3), Op2( 0), trap_raz_wi }, | |
1212 | /* DBGDTR[RT]Xext */ | |
1213 | { Op1( 0), CRn( 0), CRm( 3), Op2( 2), trap_raz_wi }, | |
1214 | DBG_BCR_BVR_WCR_WVR(3), | |
1215 | DBG_BCR_BVR_WCR_WVR(4), | |
1216 | DBG_BCR_BVR_WCR_WVR(5), | |
1217 | /* DBGWFAR */ | |
1218 | { Op1( 0), CRn( 0), CRm( 6), Op2( 0), trap_raz_wi }, | |
1219 | /* DBGOSECCR */ | |
1220 | { Op1( 0), CRn( 0), CRm( 6), Op2( 2), trap_raz_wi }, | |
1221 | DBG_BCR_BVR_WCR_WVR(6), | |
1222 | /* DBGVCR */ | |
1223 | { Op1( 0), CRn( 0), CRm( 7), Op2( 0), trap_debug32 }, | |
1224 | DBG_BCR_BVR_WCR_WVR(7), | |
1225 | DBG_BCR_BVR_WCR_WVR(8), | |
1226 | DBG_BCR_BVR_WCR_WVR(9), | |
1227 | DBG_BCR_BVR_WCR_WVR(10), | |
1228 | DBG_BCR_BVR_WCR_WVR(11), | |
1229 | DBG_BCR_BVR_WCR_WVR(12), | |
1230 | DBG_BCR_BVR_WCR_WVR(13), | |
1231 | DBG_BCR_BVR_WCR_WVR(14), | |
1232 | DBG_BCR_BVR_WCR_WVR(15), | |
1233 | ||
1234 | /* DBGDRAR (32bit) */ | |
1235 | { Op1( 0), CRn( 1), CRm( 0), Op2( 0), trap_raz_wi }, | |
1236 | ||
1237 | DBGBXVR(0), | |
1238 | /* DBGOSLAR */ | |
1239 | { Op1( 0), CRn( 1), CRm( 0), Op2( 4), trap_raz_wi }, | |
1240 | DBGBXVR(1), | |
1241 | /* DBGOSLSR */ | |
1242 | { Op1( 0), CRn( 1), CRm( 1), Op2( 4), trap_oslsr_el1 }, | |
1243 | DBGBXVR(2), | |
1244 | DBGBXVR(3), | |
1245 | /* DBGOSDLR */ | |
1246 | { Op1( 0), CRn( 1), CRm( 3), Op2( 4), trap_raz_wi }, | |
1247 | DBGBXVR(4), | |
1248 | /* DBGPRCR */ | |
1249 | { Op1( 0), CRn( 1), CRm( 4), Op2( 4), trap_raz_wi }, | |
1250 | DBGBXVR(5), | |
1251 | DBGBXVR(6), | |
1252 | DBGBXVR(7), | |
1253 | DBGBXVR(8), | |
1254 | DBGBXVR(9), | |
1255 | DBGBXVR(10), | |
1256 | DBGBXVR(11), | |
1257 | DBGBXVR(12), | |
1258 | DBGBXVR(13), | |
1259 | DBGBXVR(14), | |
1260 | DBGBXVR(15), | |
1261 | ||
1262 | /* DBGDSAR (32bit) */ | |
1263 | { Op1( 0), CRn( 2), CRm( 0), Op2( 0), trap_raz_wi }, | |
1264 | ||
1265 | /* DBGDEVID2 */ | |
1266 | { Op1( 0), CRn( 7), CRm( 0), Op2( 7), trap_raz_wi }, | |
1267 | /* DBGDEVID1 */ | |
1268 | { Op1( 0), CRn( 7), CRm( 1), Op2( 7), trap_raz_wi }, | |
1269 | /* DBGDEVID */ | |
1270 | { Op1( 0), CRn( 7), CRm( 2), Op2( 7), trap_raz_wi }, | |
1271 | /* DBGCLAIMSET */ | |
1272 | { Op1( 0), CRn( 7), CRm( 8), Op2( 6), trap_raz_wi }, | |
1273 | /* DBGCLAIMCLR */ | |
1274 | { Op1( 0), CRn( 7), CRm( 9), Op2( 6), trap_raz_wi }, | |
1275 | /* DBGAUTHSTATUS */ | |
1276 | { Op1( 0), CRn( 7), CRm(14), Op2( 6), trap_dbgauthstatus_el1 }, | |
72564016 MZ |
1277 | }; |
1278 | ||
a9866ba0 MZ |
1279 | /* Trapped cp14 64bit registers */ |
1280 | static const struct sys_reg_desc cp14_64_regs[] = { | |
bdfb4b38 MZ |
1281 | /* DBGDRAR (64bit) */ |
1282 | { Op1( 0), CRm( 1), .access = trap_raz_wi }, | |
1283 | ||
1284 | /* DBGDSAR (64bit) */ | |
1285 | { Op1( 0), CRm( 2), .access = trap_raz_wi }, | |
a9866ba0 MZ |
1286 | }; |
1287 | ||
051ff581 SZ |
1288 | /* Macro to expand the PMEVCNTRn register */ |
1289 | #define PMU_PMEVCNTR(n) \ | |
1290 | /* PMEVCNTRn */ \ | |
1291 | { Op1(0), CRn(0b1110), \ | |
1292 | CRm((0b1000 | (((n) >> 3) & 0x3))), Op2(((n) & 0x7)), \ | |
1293 | access_pmu_evcntr } | |
1294 | ||
9feb21ac SZ |
1295 | /* Macro to expand the PMEVTYPERn register */ |
1296 | #define PMU_PMEVTYPER(n) \ | |
1297 | /* PMEVTYPERn */ \ | |
1298 | { Op1(0), CRn(0b1110), \ | |
1299 | CRm((0b1100 | (((n) >> 3) & 0x3))), Op2(((n) & 0x7)), \ | |
1300 | access_pmu_evtyper } | |
1301 | ||
4d44923b MZ |
1302 | /* |
1303 | * Trapped cp15 registers. TTBR0/TTBR1 get a double encoding, | |
1304 | * depending on the way they are accessed (as a 32bit or a 64bit | |
1305 | * register). | |
1306 | */ | |
62a89c44 | 1307 | static const struct sys_reg_desc cp15_regs[] = { |
6d52f35a AP |
1308 | { Op1( 0), CRn( 0), CRm(12), Op2( 0), access_gic_sgi }, |
1309 | ||
3c1e7165 | 1310 | { Op1( 0), CRn( 1), CRm( 0), Op2( 0), access_vm_reg, NULL, c1_SCTLR }, |
4d44923b MZ |
1311 | { Op1( 0), CRn( 2), CRm( 0), Op2( 0), access_vm_reg, NULL, c2_TTBR0 }, |
1312 | { Op1( 0), CRn( 2), CRm( 0), Op2( 1), access_vm_reg, NULL, c2_TTBR1 }, | |
1313 | { Op1( 0), CRn( 2), CRm( 0), Op2( 2), access_vm_reg, NULL, c2_TTBCR }, | |
1314 | { Op1( 0), CRn( 3), CRm( 0), Op2( 0), access_vm_reg, NULL, c3_DACR }, | |
1315 | { Op1( 0), CRn( 5), CRm( 0), Op2( 0), access_vm_reg, NULL, c5_DFSR }, | |
1316 | { Op1( 0), CRn( 5), CRm( 0), Op2( 1), access_vm_reg, NULL, c5_IFSR }, | |
1317 | { Op1( 0), CRn( 5), CRm( 1), Op2( 0), access_vm_reg, NULL, c5_ADFSR }, | |
1318 | { Op1( 0), CRn( 5), CRm( 1), Op2( 1), access_vm_reg, NULL, c5_AIFSR }, | |
1319 | { Op1( 0), CRn( 6), CRm( 0), Op2( 0), access_vm_reg, NULL, c6_DFAR }, | |
1320 | { Op1( 0), CRn( 6), CRm( 0), Op2( 2), access_vm_reg, NULL, c6_IFAR }, | |
1321 | ||
62a89c44 MZ |
1322 | /* |
1323 | * DC{C,I,CI}SW operations: | |
1324 | */ | |
1325 | { Op1( 0), CRn( 7), CRm( 6), Op2( 2), access_dcsw }, | |
1326 | { Op1( 0), CRn( 7), CRm(10), Op2( 2), access_dcsw }, | |
1327 | { Op1( 0), CRn( 7), CRm(14), Op2( 2), access_dcsw }, | |
4d44923b | 1328 | |
7609c125 | 1329 | /* PMU */ |
ab946834 | 1330 | { Op1( 0), CRn( 9), CRm(12), Op2( 0), access_pmcr }, |
96b0eebc SZ |
1331 | { Op1( 0), CRn( 9), CRm(12), Op2( 1), access_pmcnten }, |
1332 | { Op1( 0), CRn( 9), CRm(12), Op2( 2), access_pmcnten }, | |
76d883c4 | 1333 | { Op1( 0), CRn( 9), CRm(12), Op2( 3), access_pmovs }, |
7a0adc70 | 1334 | { Op1( 0), CRn( 9), CRm(12), Op2( 4), access_pmswinc }, |
3965c3ce | 1335 | { Op1( 0), CRn( 9), CRm(12), Op2( 5), access_pmselr }, |
a86b5505 SZ |
1336 | { Op1( 0), CRn( 9), CRm(12), Op2( 6), access_pmceid }, |
1337 | { Op1( 0), CRn( 9), CRm(12), Op2( 7), access_pmceid }, | |
051ff581 | 1338 | { Op1( 0), CRn( 9), CRm(13), Op2( 0), access_pmu_evcntr }, |
9feb21ac | 1339 | { Op1( 0), CRn( 9), CRm(13), Op2( 1), access_pmu_evtyper }, |
051ff581 | 1340 | { Op1( 0), CRn( 9), CRm(13), Op2( 2), access_pmu_evcntr }, |
d692b8ad | 1341 | { Op1( 0), CRn( 9), CRm(14), Op2( 0), access_pmuserenr }, |
9db52c78 SZ |
1342 | { Op1( 0), CRn( 9), CRm(14), Op2( 1), access_pminten }, |
1343 | { Op1( 0), CRn( 9), CRm(14), Op2( 2), access_pminten }, | |
76d883c4 | 1344 | { Op1( 0), CRn( 9), CRm(14), Op2( 3), access_pmovs }, |
4d44923b MZ |
1345 | |
1346 | { Op1( 0), CRn(10), CRm( 2), Op2( 0), access_vm_reg, NULL, c10_PRRR }, | |
1347 | { Op1( 0), CRn(10), CRm( 2), Op2( 1), access_vm_reg, NULL, c10_NMRR }, | |
1348 | { Op1( 0), CRn(10), CRm( 3), Op2( 0), access_vm_reg, NULL, c10_AMAIR0 }, | |
1349 | { Op1( 0), CRn(10), CRm( 3), Op2( 1), access_vm_reg, NULL, c10_AMAIR1 }, | |
db7dedd0 CD |
1350 | |
1351 | /* ICC_SRE */ | |
1352 | { Op1( 0), CRn(12), CRm(12), Op2( 5), trap_raz_wi }, | |
1353 | ||
4d44923b | 1354 | { Op1( 0), CRn(13), CRm( 0), Op2( 1), access_vm_reg, NULL, c13_CID }, |
051ff581 SZ |
1355 | |
1356 | /* PMEVCNTRn */ | |
1357 | PMU_PMEVCNTR(0), | |
1358 | PMU_PMEVCNTR(1), | |
1359 | PMU_PMEVCNTR(2), | |
1360 | PMU_PMEVCNTR(3), | |
1361 | PMU_PMEVCNTR(4), | |
1362 | PMU_PMEVCNTR(5), | |
1363 | PMU_PMEVCNTR(6), | |
1364 | PMU_PMEVCNTR(7), | |
1365 | PMU_PMEVCNTR(8), | |
1366 | PMU_PMEVCNTR(9), | |
1367 | PMU_PMEVCNTR(10), | |
1368 | PMU_PMEVCNTR(11), | |
1369 | PMU_PMEVCNTR(12), | |
1370 | PMU_PMEVCNTR(13), | |
1371 | PMU_PMEVCNTR(14), | |
1372 | PMU_PMEVCNTR(15), | |
1373 | PMU_PMEVCNTR(16), | |
1374 | PMU_PMEVCNTR(17), | |
1375 | PMU_PMEVCNTR(18), | |
1376 | PMU_PMEVCNTR(19), | |
1377 | PMU_PMEVCNTR(20), | |
1378 | PMU_PMEVCNTR(21), | |
1379 | PMU_PMEVCNTR(22), | |
1380 | PMU_PMEVCNTR(23), | |
1381 | PMU_PMEVCNTR(24), | |
1382 | PMU_PMEVCNTR(25), | |
1383 | PMU_PMEVCNTR(26), | |
1384 | PMU_PMEVCNTR(27), | |
1385 | PMU_PMEVCNTR(28), | |
1386 | PMU_PMEVCNTR(29), | |
1387 | PMU_PMEVCNTR(30), | |
9feb21ac SZ |
1388 | /* PMEVTYPERn */ |
1389 | PMU_PMEVTYPER(0), | |
1390 | PMU_PMEVTYPER(1), | |
1391 | PMU_PMEVTYPER(2), | |
1392 | PMU_PMEVTYPER(3), | |
1393 | PMU_PMEVTYPER(4), | |
1394 | PMU_PMEVTYPER(5), | |
1395 | PMU_PMEVTYPER(6), | |
1396 | PMU_PMEVTYPER(7), | |
1397 | PMU_PMEVTYPER(8), | |
1398 | PMU_PMEVTYPER(9), | |
1399 | PMU_PMEVTYPER(10), | |
1400 | PMU_PMEVTYPER(11), | |
1401 | PMU_PMEVTYPER(12), | |
1402 | PMU_PMEVTYPER(13), | |
1403 | PMU_PMEVTYPER(14), | |
1404 | PMU_PMEVTYPER(15), | |
1405 | PMU_PMEVTYPER(16), | |
1406 | PMU_PMEVTYPER(17), | |
1407 | PMU_PMEVTYPER(18), | |
1408 | PMU_PMEVTYPER(19), | |
1409 | PMU_PMEVTYPER(20), | |
1410 | PMU_PMEVTYPER(21), | |
1411 | PMU_PMEVTYPER(22), | |
1412 | PMU_PMEVTYPER(23), | |
1413 | PMU_PMEVTYPER(24), | |
1414 | PMU_PMEVTYPER(25), | |
1415 | PMU_PMEVTYPER(26), | |
1416 | PMU_PMEVTYPER(27), | |
1417 | PMU_PMEVTYPER(28), | |
1418 | PMU_PMEVTYPER(29), | |
1419 | PMU_PMEVTYPER(30), | |
1420 | /* PMCCFILTR */ | |
1421 | { Op1(0), CRn(14), CRm(15), Op2(7), access_pmu_evtyper }, | |
a9866ba0 MZ |
1422 | }; |
1423 | ||
1424 | static const struct sys_reg_desc cp15_64_regs[] = { | |
1425 | { Op1( 0), CRn( 0), CRm( 2), Op2( 0), access_vm_reg, NULL, c2_TTBR0 }, | |
051ff581 | 1426 | { Op1( 0), CRn( 0), CRm( 9), Op2( 0), access_pmu_evcntr }, |
6d52f35a | 1427 | { Op1( 0), CRn( 0), CRm(12), Op2( 0), access_gic_sgi }, |
4d44923b | 1428 | { Op1( 1), CRn( 0), CRm( 2), Op2( 0), access_vm_reg, NULL, c2_TTBR1 }, |
7c8c5e6a MZ |
1429 | }; |
1430 | ||
1431 | /* Target specific emulation tables */ | |
1432 | static struct kvm_sys_reg_target_table *target_tables[KVM_ARM_NUM_TARGETS]; | |
1433 | ||
1434 | void kvm_register_target_sys_reg_table(unsigned int target, | |
1435 | struct kvm_sys_reg_target_table *table) | |
1436 | { | |
1437 | target_tables[target] = table; | |
1438 | } | |
1439 | ||
1440 | /* Get specific register table for this target. */ | |
62a89c44 MZ |
1441 | static const struct sys_reg_desc *get_target_table(unsigned target, |
1442 | bool mode_is_64, | |
1443 | size_t *num) | |
7c8c5e6a MZ |
1444 | { |
1445 | struct kvm_sys_reg_target_table *table; | |
1446 | ||
1447 | table = target_tables[target]; | |
62a89c44 MZ |
1448 | if (mode_is_64) { |
1449 | *num = table->table64.num; | |
1450 | return table->table64.table; | |
1451 | } else { | |
1452 | *num = table->table32.num; | |
1453 | return table->table32.table; | |
1454 | } | |
7c8c5e6a MZ |
1455 | } |
1456 | ||
623eefa8 MZ |
1457 | #define reg_to_match_value(x) \ |
1458 | ({ \ | |
1459 | unsigned long val; \ | |
1460 | val = (x)->Op0 << 14; \ | |
1461 | val |= (x)->Op1 << 11; \ | |
1462 | val |= (x)->CRn << 7; \ | |
1463 | val |= (x)->CRm << 3; \ | |
1464 | val |= (x)->Op2; \ | |
1465 | val; \ | |
1466 | }) | |
1467 | ||
1468 | static int match_sys_reg(const void *key, const void *elt) | |
1469 | { | |
1470 | const unsigned long pval = (unsigned long)key; | |
1471 | const struct sys_reg_desc *r = elt; | |
1472 | ||
1473 | return pval - reg_to_match_value(r); | |
1474 | } | |
1475 | ||
7c8c5e6a MZ |
1476 | static const struct sys_reg_desc *find_reg(const struct sys_reg_params *params, |
1477 | const struct sys_reg_desc table[], | |
1478 | unsigned int num) | |
1479 | { | |
623eefa8 MZ |
1480 | unsigned long pval = reg_to_match_value(params); |
1481 | ||
1482 | return bsearch((void *)pval, table, num, sizeof(table[0]), match_sys_reg); | |
7c8c5e6a MZ |
1483 | } |
1484 | ||
62a89c44 MZ |
1485 | int kvm_handle_cp14_load_store(struct kvm_vcpu *vcpu, struct kvm_run *run) |
1486 | { | |
1487 | kvm_inject_undefined(vcpu); | |
1488 | return 1; | |
1489 | } | |
1490 | ||
72564016 MZ |
1491 | /* |
1492 | * emulate_cp -- tries to match a sys_reg access in a handling table, and | |
1493 | * call the corresponding trap handler. | |
1494 | * | |
1495 | * @params: pointer to the descriptor of the access | |
1496 | * @table: array of trap descriptors | |
1497 | * @num: size of the trap descriptor array | |
1498 | * | |
1499 | * Return 0 if the access has been handled, and -1 if not. | |
1500 | */ | |
1501 | static int emulate_cp(struct kvm_vcpu *vcpu, | |
3fec037d | 1502 | struct sys_reg_params *params, |
72564016 MZ |
1503 | const struct sys_reg_desc *table, |
1504 | size_t num) | |
62a89c44 | 1505 | { |
72564016 | 1506 | const struct sys_reg_desc *r; |
62a89c44 | 1507 | |
72564016 MZ |
1508 | if (!table) |
1509 | return -1; /* Not handled */ | |
62a89c44 | 1510 | |
62a89c44 | 1511 | r = find_reg(params, table, num); |
62a89c44 | 1512 | |
72564016 | 1513 | if (r) { |
62a89c44 MZ |
1514 | /* |
1515 | * Not having an accessor means that we have | |
1516 | * configured a trap that we don't know how to | |
1517 | * handle. This certainly qualifies as a gross bug | |
1518 | * that should be fixed right away. | |
1519 | */ | |
1520 | BUG_ON(!r->access); | |
1521 | ||
1522 | if (likely(r->access(vcpu, params, r))) { | |
1523 | /* Skip instruction, since it was emulated */ | |
1524 | kvm_skip_instr(vcpu, kvm_vcpu_trap_il_is32bit(vcpu)); | |
6327f35a SZ |
1525 | /* Handled */ |
1526 | return 0; | |
62a89c44 | 1527 | } |
72564016 MZ |
1528 | } |
1529 | ||
1530 | /* Not handled */ | |
1531 | return -1; | |
1532 | } | |
1533 | ||
1534 | static void unhandled_cp_access(struct kvm_vcpu *vcpu, | |
1535 | struct sys_reg_params *params) | |
1536 | { | |
1537 | u8 hsr_ec = kvm_vcpu_trap_get_class(vcpu); | |
1538 | int cp; | |
1539 | ||
1540 | switch(hsr_ec) { | |
c6d01a94 MR |
1541 | case ESR_ELx_EC_CP15_32: |
1542 | case ESR_ELx_EC_CP15_64: | |
72564016 MZ |
1543 | cp = 15; |
1544 | break; | |
c6d01a94 MR |
1545 | case ESR_ELx_EC_CP14_MR: |
1546 | case ESR_ELx_EC_CP14_64: | |
72564016 MZ |
1547 | cp = 14; |
1548 | break; | |
1549 | default: | |
1550 | WARN_ON((cp = -1)); | |
62a89c44 MZ |
1551 | } |
1552 | ||
72564016 MZ |
1553 | kvm_err("Unsupported guest CP%d access at: %08lx\n", |
1554 | cp, *vcpu_pc(vcpu)); | |
62a89c44 MZ |
1555 | print_sys_reg_instr(params); |
1556 | kvm_inject_undefined(vcpu); | |
1557 | } | |
1558 | ||
1559 | /** | |
7769db90 | 1560 | * kvm_handle_cp_64 -- handles a mrrc/mcrr trap on a guest CP14/CP15 access |
62a89c44 MZ |
1561 | * @vcpu: The VCPU pointer |
1562 | * @run: The kvm_run struct | |
1563 | */ | |
72564016 MZ |
1564 | static int kvm_handle_cp_64(struct kvm_vcpu *vcpu, |
1565 | const struct sys_reg_desc *global, | |
1566 | size_t nr_global, | |
1567 | const struct sys_reg_desc *target_specific, | |
1568 | size_t nr_specific) | |
62a89c44 MZ |
1569 | { |
1570 | struct sys_reg_params params; | |
1571 | u32 hsr = kvm_vcpu_get_hsr(vcpu); | |
2ec5be3d | 1572 | int Rt = (hsr >> 5) & 0xf; |
62a89c44 MZ |
1573 | int Rt2 = (hsr >> 10) & 0xf; |
1574 | ||
2072d29c MZ |
1575 | params.is_aarch32 = true; |
1576 | params.is_32bit = false; | |
62a89c44 | 1577 | params.CRm = (hsr >> 1) & 0xf; |
62a89c44 MZ |
1578 | params.is_write = ((hsr & 1) == 0); |
1579 | ||
1580 | params.Op0 = 0; | |
1581 | params.Op1 = (hsr >> 16) & 0xf; | |
1582 | params.Op2 = 0; | |
1583 | params.CRn = 0; | |
1584 | ||
1585 | /* | |
2ec5be3d | 1586 | * Make a 64-bit value out of Rt and Rt2. As we use the same trap |
62a89c44 MZ |
1587 | * backends between AArch32 and AArch64, we get away with it. |
1588 | */ | |
1589 | if (params.is_write) { | |
2ec5be3d PF |
1590 | params.regval = vcpu_get_reg(vcpu, Rt) & 0xffffffff; |
1591 | params.regval |= vcpu_get_reg(vcpu, Rt2) << 32; | |
62a89c44 MZ |
1592 | } |
1593 | ||
72564016 MZ |
1594 | if (!emulate_cp(vcpu, ¶ms, target_specific, nr_specific)) |
1595 | goto out; | |
1596 | if (!emulate_cp(vcpu, ¶ms, global, nr_global)) | |
1597 | goto out; | |
1598 | ||
1599 | unhandled_cp_access(vcpu, ¶ms); | |
62a89c44 | 1600 | |
72564016 | 1601 | out: |
2ec5be3d | 1602 | /* Split up the value between registers for the read side */ |
62a89c44 | 1603 | if (!params.is_write) { |
2ec5be3d PF |
1604 | vcpu_set_reg(vcpu, Rt, lower_32_bits(params.regval)); |
1605 | vcpu_set_reg(vcpu, Rt2, upper_32_bits(params.regval)); | |
62a89c44 MZ |
1606 | } |
1607 | ||
1608 | return 1; | |
1609 | } | |
1610 | ||
1611 | /** | |
7769db90 | 1612 | * kvm_handle_cp_32 -- handles a mrc/mcr trap on a guest CP14/CP15 access |
62a89c44 MZ |
1613 | * @vcpu: The VCPU pointer |
1614 | * @run: The kvm_run struct | |
1615 | */ | |
72564016 MZ |
1616 | static int kvm_handle_cp_32(struct kvm_vcpu *vcpu, |
1617 | const struct sys_reg_desc *global, | |
1618 | size_t nr_global, | |
1619 | const struct sys_reg_desc *target_specific, | |
1620 | size_t nr_specific) | |
62a89c44 MZ |
1621 | { |
1622 | struct sys_reg_params params; | |
1623 | u32 hsr = kvm_vcpu_get_hsr(vcpu); | |
2ec5be3d | 1624 | int Rt = (hsr >> 5) & 0xf; |
62a89c44 | 1625 | |
2072d29c MZ |
1626 | params.is_aarch32 = true; |
1627 | params.is_32bit = true; | |
62a89c44 | 1628 | params.CRm = (hsr >> 1) & 0xf; |
2ec5be3d | 1629 | params.regval = vcpu_get_reg(vcpu, Rt); |
62a89c44 MZ |
1630 | params.is_write = ((hsr & 1) == 0); |
1631 | params.CRn = (hsr >> 10) & 0xf; | |
1632 | params.Op0 = 0; | |
1633 | params.Op1 = (hsr >> 14) & 0x7; | |
1634 | params.Op2 = (hsr >> 17) & 0x7; | |
1635 | ||
2ec5be3d PF |
1636 | if (!emulate_cp(vcpu, ¶ms, target_specific, nr_specific) || |
1637 | !emulate_cp(vcpu, ¶ms, global, nr_global)) { | |
1638 | if (!params.is_write) | |
1639 | vcpu_set_reg(vcpu, Rt, params.regval); | |
72564016 | 1640 | return 1; |
2ec5be3d | 1641 | } |
72564016 MZ |
1642 | |
1643 | unhandled_cp_access(vcpu, ¶ms); | |
62a89c44 MZ |
1644 | return 1; |
1645 | } | |
1646 | ||
72564016 MZ |
1647 | int kvm_handle_cp15_64(struct kvm_vcpu *vcpu, struct kvm_run *run) |
1648 | { | |
1649 | const struct sys_reg_desc *target_specific; | |
1650 | size_t num; | |
1651 | ||
1652 | target_specific = get_target_table(vcpu->arch.target, false, &num); | |
1653 | return kvm_handle_cp_64(vcpu, | |
a9866ba0 | 1654 | cp15_64_regs, ARRAY_SIZE(cp15_64_regs), |
72564016 MZ |
1655 | target_specific, num); |
1656 | } | |
1657 | ||
1658 | int kvm_handle_cp15_32(struct kvm_vcpu *vcpu, struct kvm_run *run) | |
1659 | { | |
1660 | const struct sys_reg_desc *target_specific; | |
1661 | size_t num; | |
1662 | ||
1663 | target_specific = get_target_table(vcpu->arch.target, false, &num); | |
1664 | return kvm_handle_cp_32(vcpu, | |
1665 | cp15_regs, ARRAY_SIZE(cp15_regs), | |
1666 | target_specific, num); | |
1667 | } | |
1668 | ||
1669 | int kvm_handle_cp14_64(struct kvm_vcpu *vcpu, struct kvm_run *run) | |
1670 | { | |
1671 | return kvm_handle_cp_64(vcpu, | |
a9866ba0 | 1672 | cp14_64_regs, ARRAY_SIZE(cp14_64_regs), |
72564016 MZ |
1673 | NULL, 0); |
1674 | } | |
1675 | ||
1676 | int kvm_handle_cp14_32(struct kvm_vcpu *vcpu, struct kvm_run *run) | |
1677 | { | |
1678 | return kvm_handle_cp_32(vcpu, | |
1679 | cp14_regs, ARRAY_SIZE(cp14_regs), | |
1680 | NULL, 0); | |
1681 | } | |
1682 | ||
7c8c5e6a | 1683 | static int emulate_sys_reg(struct kvm_vcpu *vcpu, |
3fec037d | 1684 | struct sys_reg_params *params) |
7c8c5e6a MZ |
1685 | { |
1686 | size_t num; | |
1687 | const struct sys_reg_desc *table, *r; | |
1688 | ||
62a89c44 | 1689 | table = get_target_table(vcpu->arch.target, true, &num); |
7c8c5e6a MZ |
1690 | |
1691 | /* Search target-specific then generic table. */ | |
1692 | r = find_reg(params, table, num); | |
1693 | if (!r) | |
1694 | r = find_reg(params, sys_reg_descs, ARRAY_SIZE(sys_reg_descs)); | |
1695 | ||
1696 | if (likely(r)) { | |
1697 | /* | |
1698 | * Not having an accessor means that we have | |
1699 | * configured a trap that we don't know how to | |
1700 | * handle. This certainly qualifies as a gross bug | |
1701 | * that should be fixed right away. | |
1702 | */ | |
1703 | BUG_ON(!r->access); | |
1704 | ||
1705 | if (likely(r->access(vcpu, params, r))) { | |
1706 | /* Skip instruction, since it was emulated */ | |
1707 | kvm_skip_instr(vcpu, kvm_vcpu_trap_il_is32bit(vcpu)); | |
1708 | return 1; | |
1709 | } | |
1710 | /* If access function fails, it should complain. */ | |
1711 | } else { | |
1712 | kvm_err("Unsupported guest sys_reg access at: %lx\n", | |
1713 | *vcpu_pc(vcpu)); | |
1714 | print_sys_reg_instr(params); | |
1715 | } | |
1716 | kvm_inject_undefined(vcpu); | |
1717 | return 1; | |
1718 | } | |
1719 | ||
1720 | static void reset_sys_reg_descs(struct kvm_vcpu *vcpu, | |
1721 | const struct sys_reg_desc *table, size_t num) | |
1722 | { | |
1723 | unsigned long i; | |
1724 | ||
1725 | for (i = 0; i < num; i++) | |
1726 | if (table[i].reset) | |
1727 | table[i].reset(vcpu, &table[i]); | |
1728 | } | |
1729 | ||
1730 | /** | |
1731 | * kvm_handle_sys_reg -- handles a mrs/msr trap on a guest sys_reg access | |
1732 | * @vcpu: The VCPU pointer | |
1733 | * @run: The kvm_run struct | |
1734 | */ | |
1735 | int kvm_handle_sys_reg(struct kvm_vcpu *vcpu, struct kvm_run *run) | |
1736 | { | |
1737 | struct sys_reg_params params; | |
1738 | unsigned long esr = kvm_vcpu_get_hsr(vcpu); | |
2ec5be3d PF |
1739 | int Rt = (esr >> 5) & 0x1f; |
1740 | int ret; | |
7c8c5e6a | 1741 | |
eef8c85a AB |
1742 | trace_kvm_handle_sys_reg(esr); |
1743 | ||
2072d29c MZ |
1744 | params.is_aarch32 = false; |
1745 | params.is_32bit = false; | |
7c8c5e6a MZ |
1746 | params.Op0 = (esr >> 20) & 3; |
1747 | params.Op1 = (esr >> 14) & 0x7; | |
1748 | params.CRn = (esr >> 10) & 0xf; | |
1749 | params.CRm = (esr >> 1) & 0xf; | |
1750 | params.Op2 = (esr >> 17) & 0x7; | |
2ec5be3d | 1751 | params.regval = vcpu_get_reg(vcpu, Rt); |
7c8c5e6a MZ |
1752 | params.is_write = !(esr & 1); |
1753 | ||
2ec5be3d PF |
1754 | ret = emulate_sys_reg(vcpu, ¶ms); |
1755 | ||
1756 | if (!params.is_write) | |
1757 | vcpu_set_reg(vcpu, Rt, params.regval); | |
1758 | return ret; | |
7c8c5e6a MZ |
1759 | } |
1760 | ||
1761 | /****************************************************************************** | |
1762 | * Userspace API | |
1763 | *****************************************************************************/ | |
1764 | ||
1765 | static bool index_to_params(u64 id, struct sys_reg_params *params) | |
1766 | { | |
1767 | switch (id & KVM_REG_SIZE_MASK) { | |
1768 | case KVM_REG_SIZE_U64: | |
1769 | /* Any unused index bits means it's not valid. */ | |
1770 | if (id & ~(KVM_REG_ARCH_MASK | KVM_REG_SIZE_MASK | |
1771 | | KVM_REG_ARM_COPROC_MASK | |
1772 | | KVM_REG_ARM64_SYSREG_OP0_MASK | |
1773 | | KVM_REG_ARM64_SYSREG_OP1_MASK | |
1774 | | KVM_REG_ARM64_SYSREG_CRN_MASK | |
1775 | | KVM_REG_ARM64_SYSREG_CRM_MASK | |
1776 | | KVM_REG_ARM64_SYSREG_OP2_MASK)) | |
1777 | return false; | |
1778 | params->Op0 = ((id & KVM_REG_ARM64_SYSREG_OP0_MASK) | |
1779 | >> KVM_REG_ARM64_SYSREG_OP0_SHIFT); | |
1780 | params->Op1 = ((id & KVM_REG_ARM64_SYSREG_OP1_MASK) | |
1781 | >> KVM_REG_ARM64_SYSREG_OP1_SHIFT); | |
1782 | params->CRn = ((id & KVM_REG_ARM64_SYSREG_CRN_MASK) | |
1783 | >> KVM_REG_ARM64_SYSREG_CRN_SHIFT); | |
1784 | params->CRm = ((id & KVM_REG_ARM64_SYSREG_CRM_MASK) | |
1785 | >> KVM_REG_ARM64_SYSREG_CRM_SHIFT); | |
1786 | params->Op2 = ((id & KVM_REG_ARM64_SYSREG_OP2_MASK) | |
1787 | >> KVM_REG_ARM64_SYSREG_OP2_SHIFT); | |
1788 | return true; | |
1789 | default: | |
1790 | return false; | |
1791 | } | |
1792 | } | |
1793 | ||
1794 | /* Decode an index value, and find the sys_reg_desc entry. */ | |
1795 | static const struct sys_reg_desc *index_to_sys_reg_desc(struct kvm_vcpu *vcpu, | |
1796 | u64 id) | |
1797 | { | |
1798 | size_t num; | |
1799 | const struct sys_reg_desc *table, *r; | |
1800 | struct sys_reg_params params; | |
1801 | ||
1802 | /* We only do sys_reg for now. */ | |
1803 | if ((id & KVM_REG_ARM_COPROC_MASK) != KVM_REG_ARM64_SYSREG) | |
1804 | return NULL; | |
1805 | ||
1806 | if (!index_to_params(id, ¶ms)) | |
1807 | return NULL; | |
1808 | ||
62a89c44 | 1809 | table = get_target_table(vcpu->arch.target, true, &num); |
7c8c5e6a MZ |
1810 | r = find_reg(¶ms, table, num); |
1811 | if (!r) | |
1812 | r = find_reg(¶ms, sys_reg_descs, ARRAY_SIZE(sys_reg_descs)); | |
1813 | ||
1814 | /* Not saved in the sys_reg array? */ | |
1815 | if (r && !r->reg) | |
1816 | r = NULL; | |
1817 | ||
1818 | return r; | |
1819 | } | |
1820 | ||
1821 | /* | |
1822 | * These are the invariant sys_reg registers: we let the guest see the | |
1823 | * host versions of these, so they're part of the guest state. | |
1824 | * | |
1825 | * A future CPU may provide a mechanism to present different values to | |
1826 | * the guest, or a future kvm may trap them. | |
1827 | */ | |
1828 | ||
1829 | #define FUNCTION_INVARIANT(reg) \ | |
1830 | static void get_##reg(struct kvm_vcpu *v, \ | |
1831 | const struct sys_reg_desc *r) \ | |
1832 | { \ | |
1833 | u64 val; \ | |
1834 | \ | |
1835 | asm volatile("mrs %0, " __stringify(reg) "\n" \ | |
1836 | : "=r" (val)); \ | |
1837 | ((struct sys_reg_desc *)r)->val = val; \ | |
1838 | } | |
1839 | ||
1840 | FUNCTION_INVARIANT(midr_el1) | |
1841 | FUNCTION_INVARIANT(ctr_el0) | |
1842 | FUNCTION_INVARIANT(revidr_el1) | |
1843 | FUNCTION_INVARIANT(id_pfr0_el1) | |
1844 | FUNCTION_INVARIANT(id_pfr1_el1) | |
1845 | FUNCTION_INVARIANT(id_dfr0_el1) | |
1846 | FUNCTION_INVARIANT(id_afr0_el1) | |
1847 | FUNCTION_INVARIANT(id_mmfr0_el1) | |
1848 | FUNCTION_INVARIANT(id_mmfr1_el1) | |
1849 | FUNCTION_INVARIANT(id_mmfr2_el1) | |
1850 | FUNCTION_INVARIANT(id_mmfr3_el1) | |
1851 | FUNCTION_INVARIANT(id_isar0_el1) | |
1852 | FUNCTION_INVARIANT(id_isar1_el1) | |
1853 | FUNCTION_INVARIANT(id_isar2_el1) | |
1854 | FUNCTION_INVARIANT(id_isar3_el1) | |
1855 | FUNCTION_INVARIANT(id_isar4_el1) | |
1856 | FUNCTION_INVARIANT(id_isar5_el1) | |
1857 | FUNCTION_INVARIANT(clidr_el1) | |
1858 | FUNCTION_INVARIANT(aidr_el1) | |
1859 | ||
1860 | /* ->val is filled in by kvm_sys_reg_table_init() */ | |
1861 | static struct sys_reg_desc invariant_sys_regs[] = { | |
1862 | { Op0(0b11), Op1(0b000), CRn(0b0000), CRm(0b0000), Op2(0b000), | |
1863 | NULL, get_midr_el1 }, | |
1864 | { Op0(0b11), Op1(0b000), CRn(0b0000), CRm(0b0000), Op2(0b110), | |
1865 | NULL, get_revidr_el1 }, | |
1866 | { Op0(0b11), Op1(0b000), CRn(0b0000), CRm(0b0001), Op2(0b000), | |
1867 | NULL, get_id_pfr0_el1 }, | |
1868 | { Op0(0b11), Op1(0b000), CRn(0b0000), CRm(0b0001), Op2(0b001), | |
1869 | NULL, get_id_pfr1_el1 }, | |
1870 | { Op0(0b11), Op1(0b000), CRn(0b0000), CRm(0b0001), Op2(0b010), | |
1871 | NULL, get_id_dfr0_el1 }, | |
1872 | { Op0(0b11), Op1(0b000), CRn(0b0000), CRm(0b0001), Op2(0b011), | |
1873 | NULL, get_id_afr0_el1 }, | |
1874 | { Op0(0b11), Op1(0b000), CRn(0b0000), CRm(0b0001), Op2(0b100), | |
1875 | NULL, get_id_mmfr0_el1 }, | |
1876 | { Op0(0b11), Op1(0b000), CRn(0b0000), CRm(0b0001), Op2(0b101), | |
1877 | NULL, get_id_mmfr1_el1 }, | |
1878 | { Op0(0b11), Op1(0b000), CRn(0b0000), CRm(0b0001), Op2(0b110), | |
1879 | NULL, get_id_mmfr2_el1 }, | |
1880 | { Op0(0b11), Op1(0b000), CRn(0b0000), CRm(0b0001), Op2(0b111), | |
1881 | NULL, get_id_mmfr3_el1 }, | |
1882 | { Op0(0b11), Op1(0b000), CRn(0b0000), CRm(0b0010), Op2(0b000), | |
1883 | NULL, get_id_isar0_el1 }, | |
1884 | { Op0(0b11), Op1(0b000), CRn(0b0000), CRm(0b0010), Op2(0b001), | |
1885 | NULL, get_id_isar1_el1 }, | |
1886 | { Op0(0b11), Op1(0b000), CRn(0b0000), CRm(0b0010), Op2(0b010), | |
1887 | NULL, get_id_isar2_el1 }, | |
1888 | { Op0(0b11), Op1(0b000), CRn(0b0000), CRm(0b0010), Op2(0b011), | |
1889 | NULL, get_id_isar3_el1 }, | |
1890 | { Op0(0b11), Op1(0b000), CRn(0b0000), CRm(0b0010), Op2(0b100), | |
1891 | NULL, get_id_isar4_el1 }, | |
1892 | { Op0(0b11), Op1(0b000), CRn(0b0000), CRm(0b0010), Op2(0b101), | |
1893 | NULL, get_id_isar5_el1 }, | |
1894 | { Op0(0b11), Op1(0b001), CRn(0b0000), CRm(0b0000), Op2(0b001), | |
1895 | NULL, get_clidr_el1 }, | |
1896 | { Op0(0b11), Op1(0b001), CRn(0b0000), CRm(0b0000), Op2(0b111), | |
1897 | NULL, get_aidr_el1 }, | |
1898 | { Op0(0b11), Op1(0b011), CRn(0b0000), CRm(0b0000), Op2(0b001), | |
1899 | NULL, get_ctr_el0 }, | |
1900 | }; | |
1901 | ||
26c99af1 | 1902 | static int reg_from_user(u64 *val, const void __user *uaddr, u64 id) |
7c8c5e6a | 1903 | { |
7c8c5e6a MZ |
1904 | if (copy_from_user(val, uaddr, KVM_REG_SIZE(id)) != 0) |
1905 | return -EFAULT; | |
1906 | return 0; | |
1907 | } | |
1908 | ||
26c99af1 | 1909 | static int reg_to_user(void __user *uaddr, const u64 *val, u64 id) |
7c8c5e6a | 1910 | { |
7c8c5e6a MZ |
1911 | if (copy_to_user(uaddr, val, KVM_REG_SIZE(id)) != 0) |
1912 | return -EFAULT; | |
1913 | return 0; | |
1914 | } | |
1915 | ||
1916 | static int get_invariant_sys_reg(u64 id, void __user *uaddr) | |
1917 | { | |
1918 | struct sys_reg_params params; | |
1919 | const struct sys_reg_desc *r; | |
1920 | ||
1921 | if (!index_to_params(id, ¶ms)) | |
1922 | return -ENOENT; | |
1923 | ||
1924 | r = find_reg(¶ms, invariant_sys_regs, ARRAY_SIZE(invariant_sys_regs)); | |
1925 | if (!r) | |
1926 | return -ENOENT; | |
1927 | ||
1928 | return reg_to_user(uaddr, &r->val, id); | |
1929 | } | |
1930 | ||
1931 | static int set_invariant_sys_reg(u64 id, void __user *uaddr) | |
1932 | { | |
1933 | struct sys_reg_params params; | |
1934 | const struct sys_reg_desc *r; | |
1935 | int err; | |
1936 | u64 val = 0; /* Make sure high bits are 0 for 32-bit regs */ | |
1937 | ||
1938 | if (!index_to_params(id, ¶ms)) | |
1939 | return -ENOENT; | |
1940 | r = find_reg(¶ms, invariant_sys_regs, ARRAY_SIZE(invariant_sys_regs)); | |
1941 | if (!r) | |
1942 | return -ENOENT; | |
1943 | ||
1944 | err = reg_from_user(&val, uaddr, id); | |
1945 | if (err) | |
1946 | return err; | |
1947 | ||
1948 | /* This is what we mean by invariant: you can't change it. */ | |
1949 | if (r->val != val) | |
1950 | return -EINVAL; | |
1951 | ||
1952 | return 0; | |
1953 | } | |
1954 | ||
1955 | static bool is_valid_cache(u32 val) | |
1956 | { | |
1957 | u32 level, ctype; | |
1958 | ||
1959 | if (val >= CSSELR_MAX) | |
18d45766 | 1960 | return false; |
7c8c5e6a MZ |
1961 | |
1962 | /* Bottom bit is Instruction or Data bit. Next 3 bits are level. */ | |
1963 | level = (val >> 1); | |
1964 | ctype = (cache_levels >> (level * 3)) & 7; | |
1965 | ||
1966 | switch (ctype) { | |
1967 | case 0: /* No cache */ | |
1968 | return false; | |
1969 | case 1: /* Instruction cache only */ | |
1970 | return (val & 1); | |
1971 | case 2: /* Data cache only */ | |
1972 | case 4: /* Unified cache */ | |
1973 | return !(val & 1); | |
1974 | case 3: /* Separate instruction and data caches */ | |
1975 | return true; | |
1976 | default: /* Reserved: we can't know instruction or data. */ | |
1977 | return false; | |
1978 | } | |
1979 | } | |
1980 | ||
1981 | static int demux_c15_get(u64 id, void __user *uaddr) | |
1982 | { | |
1983 | u32 val; | |
1984 | u32 __user *uval = uaddr; | |
1985 | ||
1986 | /* Fail if we have unknown bits set. */ | |
1987 | if (id & ~(KVM_REG_ARCH_MASK|KVM_REG_SIZE_MASK|KVM_REG_ARM_COPROC_MASK | |
1988 | | ((1 << KVM_REG_ARM_COPROC_SHIFT)-1))) | |
1989 | return -ENOENT; | |
1990 | ||
1991 | switch (id & KVM_REG_ARM_DEMUX_ID_MASK) { | |
1992 | case KVM_REG_ARM_DEMUX_ID_CCSIDR: | |
1993 | if (KVM_REG_SIZE(id) != 4) | |
1994 | return -ENOENT; | |
1995 | val = (id & KVM_REG_ARM_DEMUX_VAL_MASK) | |
1996 | >> KVM_REG_ARM_DEMUX_VAL_SHIFT; | |
1997 | if (!is_valid_cache(val)) | |
1998 | return -ENOENT; | |
1999 | ||
2000 | return put_user(get_ccsidr(val), uval); | |
2001 | default: | |
2002 | return -ENOENT; | |
2003 | } | |
2004 | } | |
2005 | ||
2006 | static int demux_c15_set(u64 id, void __user *uaddr) | |
2007 | { | |
2008 | u32 val, newval; | |
2009 | u32 __user *uval = uaddr; | |
2010 | ||
2011 | /* Fail if we have unknown bits set. */ | |
2012 | if (id & ~(KVM_REG_ARCH_MASK|KVM_REG_SIZE_MASK|KVM_REG_ARM_COPROC_MASK | |
2013 | | ((1 << KVM_REG_ARM_COPROC_SHIFT)-1))) | |
2014 | return -ENOENT; | |
2015 | ||
2016 | switch (id & KVM_REG_ARM_DEMUX_ID_MASK) { | |
2017 | case KVM_REG_ARM_DEMUX_ID_CCSIDR: | |
2018 | if (KVM_REG_SIZE(id) != 4) | |
2019 | return -ENOENT; | |
2020 | val = (id & KVM_REG_ARM_DEMUX_VAL_MASK) | |
2021 | >> KVM_REG_ARM_DEMUX_VAL_SHIFT; | |
2022 | if (!is_valid_cache(val)) | |
2023 | return -ENOENT; | |
2024 | ||
2025 | if (get_user(newval, uval)) | |
2026 | return -EFAULT; | |
2027 | ||
2028 | /* This is also invariant: you can't change it. */ | |
2029 | if (newval != get_ccsidr(val)) | |
2030 | return -EINVAL; | |
2031 | return 0; | |
2032 | default: | |
2033 | return -ENOENT; | |
2034 | } | |
2035 | } | |
2036 | ||
2037 | int kvm_arm_sys_reg_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg) | |
2038 | { | |
2039 | const struct sys_reg_desc *r; | |
2040 | void __user *uaddr = (void __user *)(unsigned long)reg->addr; | |
2041 | ||
2042 | if ((reg->id & KVM_REG_ARM_COPROC_MASK) == KVM_REG_ARM_DEMUX) | |
2043 | return demux_c15_get(reg->id, uaddr); | |
2044 | ||
2045 | if (KVM_REG_SIZE(reg->id) != sizeof(__u64)) | |
2046 | return -ENOENT; | |
2047 | ||
2048 | r = index_to_sys_reg_desc(vcpu, reg->id); | |
2049 | if (!r) | |
2050 | return get_invariant_sys_reg(reg->id, uaddr); | |
2051 | ||
84e690bf AB |
2052 | if (r->get_user) |
2053 | return (r->get_user)(vcpu, r, reg, uaddr); | |
2054 | ||
7c8c5e6a MZ |
2055 | return reg_to_user(uaddr, &vcpu_sys_reg(vcpu, r->reg), reg->id); |
2056 | } | |
2057 | ||
2058 | int kvm_arm_sys_reg_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg) | |
2059 | { | |
2060 | const struct sys_reg_desc *r; | |
2061 | void __user *uaddr = (void __user *)(unsigned long)reg->addr; | |
2062 | ||
2063 | if ((reg->id & KVM_REG_ARM_COPROC_MASK) == KVM_REG_ARM_DEMUX) | |
2064 | return demux_c15_set(reg->id, uaddr); | |
2065 | ||
2066 | if (KVM_REG_SIZE(reg->id) != sizeof(__u64)) | |
2067 | return -ENOENT; | |
2068 | ||
2069 | r = index_to_sys_reg_desc(vcpu, reg->id); | |
2070 | if (!r) | |
2071 | return set_invariant_sys_reg(reg->id, uaddr); | |
2072 | ||
84e690bf AB |
2073 | if (r->set_user) |
2074 | return (r->set_user)(vcpu, r, reg, uaddr); | |
2075 | ||
7c8c5e6a MZ |
2076 | return reg_from_user(&vcpu_sys_reg(vcpu, r->reg), uaddr, reg->id); |
2077 | } | |
2078 | ||
2079 | static unsigned int num_demux_regs(void) | |
2080 | { | |
2081 | unsigned int i, count = 0; | |
2082 | ||
2083 | for (i = 0; i < CSSELR_MAX; i++) | |
2084 | if (is_valid_cache(i)) | |
2085 | count++; | |
2086 | ||
2087 | return count; | |
2088 | } | |
2089 | ||
2090 | static int write_demux_regids(u64 __user *uindices) | |
2091 | { | |
efd48cea | 2092 | u64 val = KVM_REG_ARM64 | KVM_REG_SIZE_U32 | KVM_REG_ARM_DEMUX; |
7c8c5e6a MZ |
2093 | unsigned int i; |
2094 | ||
2095 | val |= KVM_REG_ARM_DEMUX_ID_CCSIDR; | |
2096 | for (i = 0; i < CSSELR_MAX; i++) { | |
2097 | if (!is_valid_cache(i)) | |
2098 | continue; | |
2099 | if (put_user(val | i, uindices)) | |
2100 | return -EFAULT; | |
2101 | uindices++; | |
2102 | } | |
2103 | return 0; | |
2104 | } | |
2105 | ||
2106 | static u64 sys_reg_to_index(const struct sys_reg_desc *reg) | |
2107 | { | |
2108 | return (KVM_REG_ARM64 | KVM_REG_SIZE_U64 | | |
2109 | KVM_REG_ARM64_SYSREG | | |
2110 | (reg->Op0 << KVM_REG_ARM64_SYSREG_OP0_SHIFT) | | |
2111 | (reg->Op1 << KVM_REG_ARM64_SYSREG_OP1_SHIFT) | | |
2112 | (reg->CRn << KVM_REG_ARM64_SYSREG_CRN_SHIFT) | | |
2113 | (reg->CRm << KVM_REG_ARM64_SYSREG_CRM_SHIFT) | | |
2114 | (reg->Op2 << KVM_REG_ARM64_SYSREG_OP2_SHIFT)); | |
2115 | } | |
2116 | ||
2117 | static bool copy_reg_to_user(const struct sys_reg_desc *reg, u64 __user **uind) | |
2118 | { | |
2119 | if (!*uind) | |
2120 | return true; | |
2121 | ||
2122 | if (put_user(sys_reg_to_index(reg), *uind)) | |
2123 | return false; | |
2124 | ||
2125 | (*uind)++; | |
2126 | return true; | |
2127 | } | |
2128 | ||
2129 | /* Assumed ordered tables, see kvm_sys_reg_table_init. */ | |
2130 | static int walk_sys_regs(struct kvm_vcpu *vcpu, u64 __user *uind) | |
2131 | { | |
2132 | const struct sys_reg_desc *i1, *i2, *end1, *end2; | |
2133 | unsigned int total = 0; | |
2134 | size_t num; | |
2135 | ||
2136 | /* We check for duplicates here, to allow arch-specific overrides. */ | |
62a89c44 | 2137 | i1 = get_target_table(vcpu->arch.target, true, &num); |
7c8c5e6a MZ |
2138 | end1 = i1 + num; |
2139 | i2 = sys_reg_descs; | |
2140 | end2 = sys_reg_descs + ARRAY_SIZE(sys_reg_descs); | |
2141 | ||
2142 | BUG_ON(i1 == end1 || i2 == end2); | |
2143 | ||
2144 | /* Walk carefully, as both tables may refer to the same register. */ | |
2145 | while (i1 || i2) { | |
2146 | int cmp = cmp_sys_reg(i1, i2); | |
2147 | /* target-specific overrides generic entry. */ | |
2148 | if (cmp <= 0) { | |
2149 | /* Ignore registers we trap but don't save. */ | |
2150 | if (i1->reg) { | |
2151 | if (!copy_reg_to_user(i1, &uind)) | |
2152 | return -EFAULT; | |
2153 | total++; | |
2154 | } | |
2155 | } else { | |
2156 | /* Ignore registers we trap but don't save. */ | |
2157 | if (i2->reg) { | |
2158 | if (!copy_reg_to_user(i2, &uind)) | |
2159 | return -EFAULT; | |
2160 | total++; | |
2161 | } | |
2162 | } | |
2163 | ||
2164 | if (cmp <= 0 && ++i1 == end1) | |
2165 | i1 = NULL; | |
2166 | if (cmp >= 0 && ++i2 == end2) | |
2167 | i2 = NULL; | |
2168 | } | |
2169 | return total; | |
2170 | } | |
2171 | ||
2172 | unsigned long kvm_arm_num_sys_reg_descs(struct kvm_vcpu *vcpu) | |
2173 | { | |
2174 | return ARRAY_SIZE(invariant_sys_regs) | |
2175 | + num_demux_regs() | |
2176 | + walk_sys_regs(vcpu, (u64 __user *)NULL); | |
2177 | } | |
2178 | ||
2179 | int kvm_arm_copy_sys_reg_indices(struct kvm_vcpu *vcpu, u64 __user *uindices) | |
2180 | { | |
2181 | unsigned int i; | |
2182 | int err; | |
2183 | ||
2184 | /* Then give them all the invariant registers' indices. */ | |
2185 | for (i = 0; i < ARRAY_SIZE(invariant_sys_regs); i++) { | |
2186 | if (put_user(sys_reg_to_index(&invariant_sys_regs[i]), uindices)) | |
2187 | return -EFAULT; | |
2188 | uindices++; | |
2189 | } | |
2190 | ||
2191 | err = walk_sys_regs(vcpu, uindices); | |
2192 | if (err < 0) | |
2193 | return err; | |
2194 | uindices += err; | |
2195 | ||
2196 | return write_demux_regids(uindices); | |
2197 | } | |
2198 | ||
e6a95517 MZ |
2199 | static int check_sysreg_table(const struct sys_reg_desc *table, unsigned int n) |
2200 | { | |
2201 | unsigned int i; | |
2202 | ||
2203 | for (i = 1; i < n; i++) { | |
2204 | if (cmp_sys_reg(&table[i-1], &table[i]) >= 0) { | |
2205 | kvm_err("sys_reg table %p out of order (%d)\n", table, i - 1); | |
2206 | return 1; | |
2207 | } | |
2208 | } | |
2209 | ||
2210 | return 0; | |
2211 | } | |
2212 | ||
7c8c5e6a MZ |
2213 | void kvm_sys_reg_table_init(void) |
2214 | { | |
2215 | unsigned int i; | |
2216 | struct sys_reg_desc clidr; | |
2217 | ||
2218 | /* Make sure tables are unique and in order. */ | |
e6a95517 MZ |
2219 | BUG_ON(check_sysreg_table(sys_reg_descs, ARRAY_SIZE(sys_reg_descs))); |
2220 | BUG_ON(check_sysreg_table(cp14_regs, ARRAY_SIZE(cp14_regs))); | |
2221 | BUG_ON(check_sysreg_table(cp14_64_regs, ARRAY_SIZE(cp14_64_regs))); | |
2222 | BUG_ON(check_sysreg_table(cp15_regs, ARRAY_SIZE(cp15_regs))); | |
2223 | BUG_ON(check_sysreg_table(cp15_64_regs, ARRAY_SIZE(cp15_64_regs))); | |
2224 | BUG_ON(check_sysreg_table(invariant_sys_regs, ARRAY_SIZE(invariant_sys_regs))); | |
7c8c5e6a MZ |
2225 | |
2226 | /* We abuse the reset function to overwrite the table itself. */ | |
2227 | for (i = 0; i < ARRAY_SIZE(invariant_sys_regs); i++) | |
2228 | invariant_sys_regs[i].reset(NULL, &invariant_sys_regs[i]); | |
2229 | ||
2230 | /* | |
2231 | * CLIDR format is awkward, so clean it up. See ARM B4.1.20: | |
2232 | * | |
2233 | * If software reads the Cache Type fields from Ctype1 | |
2234 | * upwards, once it has seen a value of 0b000, no caches | |
2235 | * exist at further-out levels of the hierarchy. So, for | |
2236 | * example, if Ctype3 is the first Cache Type field with a | |
2237 | * value of 0b000, the values of Ctype4 to Ctype7 must be | |
2238 | * ignored. | |
2239 | */ | |
2240 | get_clidr_el1(NULL, &clidr); /* Ugly... */ | |
2241 | cache_levels = clidr.val; | |
2242 | for (i = 0; i < 7; i++) | |
2243 | if (((cache_levels >> (i*3)) & 7) == 0) | |
2244 | break; | |
2245 | /* Clear all higher bits. */ | |
2246 | cache_levels &= (1 << (i*3))-1; | |
2247 | } | |
2248 | ||
2249 | /** | |
2250 | * kvm_reset_sys_regs - sets system registers to reset value | |
2251 | * @vcpu: The VCPU pointer | |
2252 | * | |
2253 | * This function finds the right table above and sets the registers on the | |
2254 | * virtual CPU struct to their architecturally defined reset values. | |
2255 | */ | |
2256 | void kvm_reset_sys_regs(struct kvm_vcpu *vcpu) | |
2257 | { | |
2258 | size_t num; | |
2259 | const struct sys_reg_desc *table; | |
2260 | ||
2261 | /* Catch someone adding a register without putting in reset entry. */ | |
2262 | memset(&vcpu->arch.ctxt.sys_regs, 0x42, sizeof(vcpu->arch.ctxt.sys_regs)); | |
2263 | ||
2264 | /* Generic chip reset first (so target could override). */ | |
2265 | reset_sys_reg_descs(vcpu, sys_reg_descs, ARRAY_SIZE(sys_reg_descs)); | |
2266 | ||
62a89c44 | 2267 | table = get_target_table(vcpu->arch.target, true, &num); |
7c8c5e6a MZ |
2268 | reset_sys_reg_descs(vcpu, table, num); |
2269 | ||
2270 | for (num = 1; num < NR_SYS_REGS; num++) | |
2271 | if (vcpu_sys_reg(vcpu, num) == 0x4242424242424242) | |
2272 | panic("Didn't reset vcpu_sys_reg(%zi)", num); | |
2273 | } |