xref: /openbmc/linux/arch/powerpc/kvm/booke.c (revision 953e3739)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  *
4  * Copyright IBM Corp. 2007
5  * Copyright 2010-2011 Freescale Semiconductor, Inc.
6  *
7  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
8  *          Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
9  *          Scott Wood <scottwood@freescale.com>
10  *          Varun Sethi <varun.sethi@freescale.com>
11  */
12 
13 #include <linux/errno.h>
14 #include <linux/err.h>
15 #include <linux/kvm_host.h>
16 #include <linux/gfp.h>
17 #include <linux/module.h>
18 #include <linux/vmalloc.h>
19 #include <linux/fs.h>
20 
21 #include <asm/cputable.h>
22 #include <linux/uaccess.h>
23 #include <asm/interrupt.h>
24 #include <asm/kvm_ppc.h>
25 #include <asm/cacheflush.h>
26 #include <asm/dbell.h>
27 #include <asm/hw_irq.h>
28 #include <asm/irq.h>
29 #include <asm/time.h>
30 
31 #include "timing.h"
32 #include "booke.h"
33 
34 #define CREATE_TRACE_POINTS
35 #include "trace_booke.h"
36 
37 unsigned long kvmppc_booke_handlers;
38 
39 const struct _kvm_stats_desc kvm_vm_stats_desc[] = {
40 	KVM_GENERIC_VM_STATS(),
41 	STATS_DESC_ICOUNTER(VM, num_2M_pages),
42 	STATS_DESC_ICOUNTER(VM, num_1G_pages)
43 };
44 
45 const struct kvm_stats_header kvm_vm_stats_header = {
46 	.name_size = KVM_STATS_NAME_SIZE,
47 	.num_desc = ARRAY_SIZE(kvm_vm_stats_desc),
48 	.id_offset = sizeof(struct kvm_stats_header),
49 	.desc_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE,
50 	.data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE +
51 		       sizeof(kvm_vm_stats_desc),
52 };
53 
54 const struct _kvm_stats_desc kvm_vcpu_stats_desc[] = {
55 	KVM_GENERIC_VCPU_STATS(),
56 	STATS_DESC_COUNTER(VCPU, sum_exits),
57 	STATS_DESC_COUNTER(VCPU, mmio_exits),
58 	STATS_DESC_COUNTER(VCPU, signal_exits),
59 	STATS_DESC_COUNTER(VCPU, light_exits),
60 	STATS_DESC_COUNTER(VCPU, itlb_real_miss_exits),
61 	STATS_DESC_COUNTER(VCPU, itlb_virt_miss_exits),
62 	STATS_DESC_COUNTER(VCPU, dtlb_real_miss_exits),
63 	STATS_DESC_COUNTER(VCPU, dtlb_virt_miss_exits),
64 	STATS_DESC_COUNTER(VCPU, syscall_exits),
65 	STATS_DESC_COUNTER(VCPU, isi_exits),
66 	STATS_DESC_COUNTER(VCPU, dsi_exits),
67 	STATS_DESC_COUNTER(VCPU, emulated_inst_exits),
68 	STATS_DESC_COUNTER(VCPU, dec_exits),
69 	STATS_DESC_COUNTER(VCPU, ext_intr_exits),
70 	STATS_DESC_COUNTER(VCPU, halt_successful_wait),
71 	STATS_DESC_COUNTER(VCPU, dbell_exits),
72 	STATS_DESC_COUNTER(VCPU, gdbell_exits),
73 	STATS_DESC_COUNTER(VCPU, ld),
74 	STATS_DESC_COUNTER(VCPU, st),
75 	STATS_DESC_COUNTER(VCPU, pthru_all),
76 	STATS_DESC_COUNTER(VCPU, pthru_host),
77 	STATS_DESC_COUNTER(VCPU, pthru_bad_aff)
78 };
79 
80 const struct kvm_stats_header kvm_vcpu_stats_header = {
81 	.name_size = KVM_STATS_NAME_SIZE,
82 	.num_desc = ARRAY_SIZE(kvm_vcpu_stats_desc),
83 	.id_offset = sizeof(struct kvm_stats_header),
84 	.desc_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE,
85 	.data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE +
86 		       sizeof(kvm_vcpu_stats_desc),
87 };
88 
89 /* TODO: use vcpu_printf() */
kvmppc_dump_vcpu(struct kvm_vcpu * vcpu)90 void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
91 {
92 	int i;
93 
94 	printk("pc:   %08lx msr:  %08llx\n", vcpu->arch.regs.nip,
95 			vcpu->arch.shared->msr);
96 	printk("lr:   %08lx ctr:  %08lx\n", vcpu->arch.regs.link,
97 			vcpu->arch.regs.ctr);
98 	printk("srr0: %08llx srr1: %08llx\n", vcpu->arch.shared->srr0,
99 					    vcpu->arch.shared->srr1);
100 
101 	printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
102 
103 	for (i = 0; i < 32; i += 4) {
104 		printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
105 		       kvmppc_get_gpr(vcpu, i),
106 		       kvmppc_get_gpr(vcpu, i+1),
107 		       kvmppc_get_gpr(vcpu, i+2),
108 		       kvmppc_get_gpr(vcpu, i+3));
109 	}
110 }
111 
112 #ifdef CONFIG_SPE
kvmppc_vcpu_disable_spe(struct kvm_vcpu * vcpu)113 void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu)
114 {
115 	preempt_disable();
116 	enable_kernel_spe();
117 	kvmppc_save_guest_spe(vcpu);
118 	disable_kernel_spe();
119 	vcpu->arch.shadow_msr &= ~MSR_SPE;
120 	preempt_enable();
121 }
122 
kvmppc_vcpu_enable_spe(struct kvm_vcpu * vcpu)123 static void kvmppc_vcpu_enable_spe(struct kvm_vcpu *vcpu)
124 {
125 	preempt_disable();
126 	enable_kernel_spe();
127 	kvmppc_load_guest_spe(vcpu);
128 	disable_kernel_spe();
129 	vcpu->arch.shadow_msr |= MSR_SPE;
130 	preempt_enable();
131 }
132 
kvmppc_vcpu_sync_spe(struct kvm_vcpu * vcpu)133 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
134 {
135 	if (vcpu->arch.shared->msr & MSR_SPE) {
136 		if (!(vcpu->arch.shadow_msr & MSR_SPE))
137 			kvmppc_vcpu_enable_spe(vcpu);
138 	} else if (vcpu->arch.shadow_msr & MSR_SPE) {
139 		kvmppc_vcpu_disable_spe(vcpu);
140 	}
141 }
142 #else
kvmppc_vcpu_sync_spe(struct kvm_vcpu * vcpu)143 static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
144 {
145 }
146 #endif
147 
148 /*
149  * Load up guest vcpu FP state if it's needed.
150  * It also set the MSR_FP in thread so that host know
151  * we're holding FPU, and then host can help to save
152  * guest vcpu FP state if other threads require to use FPU.
153  * This simulates an FP unavailable fault.
154  *
155  * It requires to be called with preemption disabled.
156  */
kvmppc_load_guest_fp(struct kvm_vcpu * vcpu)157 static inline void kvmppc_load_guest_fp(struct kvm_vcpu *vcpu)
158 {
159 #ifdef CONFIG_PPC_FPU
160 	if (!(current->thread.regs->msr & MSR_FP)) {
161 		enable_kernel_fp();
162 		load_fp_state(&vcpu->arch.fp);
163 		disable_kernel_fp();
164 		current->thread.fp_save_area = &vcpu->arch.fp;
165 		current->thread.regs->msr |= MSR_FP;
166 	}
167 #endif
168 }
169 
170 /*
171  * Save guest vcpu FP state into thread.
172  * It requires to be called with preemption disabled.
173  */
kvmppc_save_guest_fp(struct kvm_vcpu * vcpu)174 static inline void kvmppc_save_guest_fp(struct kvm_vcpu *vcpu)
175 {
176 #ifdef CONFIG_PPC_FPU
177 	if (current->thread.regs->msr & MSR_FP)
178 		giveup_fpu(current);
179 	current->thread.fp_save_area = NULL;
180 #endif
181 }
182 
kvmppc_vcpu_sync_fpu(struct kvm_vcpu * vcpu)183 static void kvmppc_vcpu_sync_fpu(struct kvm_vcpu *vcpu)
184 {
185 #if defined(CONFIG_PPC_FPU) && !defined(CONFIG_KVM_BOOKE_HV)
186 	/* We always treat the FP bit as enabled from the host
187 	   perspective, so only need to adjust the shadow MSR */
188 	vcpu->arch.shadow_msr &= ~MSR_FP;
189 	vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_FP;
190 #endif
191 }
192 
193 /*
194  * Simulate AltiVec unavailable fault to load guest state
195  * from thread to AltiVec unit.
196  * It requires to be called with preemption disabled.
197  */
kvmppc_load_guest_altivec(struct kvm_vcpu * vcpu)198 static inline void kvmppc_load_guest_altivec(struct kvm_vcpu *vcpu)
199 {
200 #ifdef CONFIG_ALTIVEC
201 	if (cpu_has_feature(CPU_FTR_ALTIVEC)) {
202 		if (!(current->thread.regs->msr & MSR_VEC)) {
203 			enable_kernel_altivec();
204 			load_vr_state(&vcpu->arch.vr);
205 			disable_kernel_altivec();
206 			current->thread.vr_save_area = &vcpu->arch.vr;
207 			current->thread.regs->msr |= MSR_VEC;
208 		}
209 	}
210 #endif
211 }
212 
213 /*
214  * Save guest vcpu AltiVec state into thread.
215  * It requires to be called with preemption disabled.
216  */
kvmppc_save_guest_altivec(struct kvm_vcpu * vcpu)217 static inline void kvmppc_save_guest_altivec(struct kvm_vcpu *vcpu)
218 {
219 #ifdef CONFIG_ALTIVEC
220 	if (cpu_has_feature(CPU_FTR_ALTIVEC)) {
221 		if (current->thread.regs->msr & MSR_VEC)
222 			giveup_altivec(current);
223 		current->thread.vr_save_area = NULL;
224 	}
225 #endif
226 }
227 
kvmppc_vcpu_sync_debug(struct kvm_vcpu * vcpu)228 static void kvmppc_vcpu_sync_debug(struct kvm_vcpu *vcpu)
229 {
230 	/* Synchronize guest's desire to get debug interrupts into shadow MSR */
231 #ifndef CONFIG_KVM_BOOKE_HV
232 	vcpu->arch.shadow_msr &= ~MSR_DE;
233 	vcpu->arch.shadow_msr |= vcpu->arch.shared->msr & MSR_DE;
234 #endif
235 
236 	/* Force enable debug interrupts when user space wants to debug */
237 	if (vcpu->guest_debug) {
238 #ifdef CONFIG_KVM_BOOKE_HV
239 		/*
240 		 * Since there is no shadow MSR, sync MSR_DE into the guest
241 		 * visible MSR.
242 		 */
243 		vcpu->arch.shared->msr |= MSR_DE;
244 #else
245 		vcpu->arch.shadow_msr |= MSR_DE;
246 		vcpu->arch.shared->msr &= ~MSR_DE;
247 #endif
248 	}
249 }
250 
251 /*
252  * Helper function for "full" MSR writes.  No need to call this if only
253  * EE/CE/ME/DE/RI are changing.
254  */
kvmppc_set_msr(struct kvm_vcpu * vcpu,u32 new_msr)255 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr)
256 {
257 	u32 old_msr = vcpu->arch.shared->msr;
258 
259 #ifdef CONFIG_KVM_BOOKE_HV
260 	new_msr |= MSR_GS;
261 #endif
262 
263 	vcpu->arch.shared->msr = new_msr;
264 
265 	kvmppc_mmu_msr_notify(vcpu, old_msr);
266 	kvmppc_vcpu_sync_spe(vcpu);
267 	kvmppc_vcpu_sync_fpu(vcpu);
268 	kvmppc_vcpu_sync_debug(vcpu);
269 }
270 
kvmppc_booke_queue_irqprio(struct kvm_vcpu * vcpu,unsigned int priority)271 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
272                                        unsigned int priority)
273 {
274 	trace_kvm_booke_queue_irqprio(vcpu, priority);
275 	set_bit(priority, &vcpu->arch.pending_exceptions);
276 }
277 
kvmppc_core_queue_dtlb_miss(struct kvm_vcpu * vcpu,ulong dear_flags,ulong esr_flags)278 void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu,
279 				 ulong dear_flags, ulong esr_flags)
280 {
281 	vcpu->arch.queued_dear = dear_flags;
282 	vcpu->arch.queued_esr = esr_flags;
283 	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
284 }
285 
kvmppc_core_queue_data_storage(struct kvm_vcpu * vcpu,ulong srr1_flags,ulong dear_flags,ulong esr_flags)286 void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, ulong srr1_flags,
287 				    ulong dear_flags, ulong esr_flags)
288 {
289 	WARN_ON_ONCE(srr1_flags);
290 	vcpu->arch.queued_dear = dear_flags;
291 	vcpu->arch.queued_esr = esr_flags;
292 	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
293 }
294 
kvmppc_core_queue_itlb_miss(struct kvm_vcpu * vcpu)295 void kvmppc_core_queue_itlb_miss(struct kvm_vcpu *vcpu)
296 {
297 	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
298 }
299 
kvmppc_core_queue_inst_storage(struct kvm_vcpu * vcpu,ulong esr_flags)300 void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong esr_flags)
301 {
302 	vcpu->arch.queued_esr = esr_flags;
303 	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
304 }
305 
kvmppc_core_queue_alignment(struct kvm_vcpu * vcpu,ulong dear_flags,ulong esr_flags)306 static void kvmppc_core_queue_alignment(struct kvm_vcpu *vcpu, ulong dear_flags,
307 					ulong esr_flags)
308 {
309 	vcpu->arch.queued_dear = dear_flags;
310 	vcpu->arch.queued_esr = esr_flags;
311 	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALIGNMENT);
312 }
313 
kvmppc_core_queue_program(struct kvm_vcpu * vcpu,ulong esr_flags)314 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags)
315 {
316 	vcpu->arch.queued_esr = esr_flags;
317 	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
318 }
319 
kvmppc_core_queue_fpunavail(struct kvm_vcpu * vcpu,ulong srr1_flags)320 void kvmppc_core_queue_fpunavail(struct kvm_vcpu *vcpu, ulong srr1_flags)
321 {
322 	WARN_ON_ONCE(srr1_flags);
323 	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
324 }
325 
326 #ifdef CONFIG_ALTIVEC
kvmppc_core_queue_vec_unavail(struct kvm_vcpu * vcpu,ulong srr1_flags)327 void kvmppc_core_queue_vec_unavail(struct kvm_vcpu *vcpu, ulong srr1_flags)
328 {
329 	WARN_ON_ONCE(srr1_flags);
330 	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_UNAVAIL);
331 }
332 #endif
333 
kvmppc_core_queue_dec(struct kvm_vcpu * vcpu)334 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
335 {
336 	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
337 }
338 
kvmppc_core_pending_dec(struct kvm_vcpu * vcpu)339 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
340 {
341 	return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
342 }
343 
kvmppc_core_dequeue_dec(struct kvm_vcpu * vcpu)344 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
345 {
346 	clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
347 }
348 
kvmppc_core_queue_external(struct kvm_vcpu * vcpu,struct kvm_interrupt * irq)349 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
350                                 struct kvm_interrupt *irq)
351 {
352 	unsigned int prio = BOOKE_IRQPRIO_EXTERNAL;
353 
354 	if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
355 		prio = BOOKE_IRQPRIO_EXTERNAL_LEVEL;
356 
357 	kvmppc_booke_queue_irqprio(vcpu, prio);
358 }
359 
kvmppc_core_dequeue_external(struct kvm_vcpu * vcpu)360 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
361 {
362 	clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions);
363 	clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions);
364 }
365 
kvmppc_core_queue_watchdog(struct kvm_vcpu * vcpu)366 static void kvmppc_core_queue_watchdog(struct kvm_vcpu *vcpu)
367 {
368 	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_WATCHDOG);
369 }
370 
kvmppc_core_dequeue_watchdog(struct kvm_vcpu * vcpu)371 static void kvmppc_core_dequeue_watchdog(struct kvm_vcpu *vcpu)
372 {
373 	clear_bit(BOOKE_IRQPRIO_WATCHDOG, &vcpu->arch.pending_exceptions);
374 }
375 
kvmppc_core_queue_debug(struct kvm_vcpu * vcpu)376 void kvmppc_core_queue_debug(struct kvm_vcpu *vcpu)
377 {
378 	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DEBUG);
379 }
380 
kvmppc_core_dequeue_debug(struct kvm_vcpu * vcpu)381 void kvmppc_core_dequeue_debug(struct kvm_vcpu *vcpu)
382 {
383 	clear_bit(BOOKE_IRQPRIO_DEBUG, &vcpu->arch.pending_exceptions);
384 }
385 
set_guest_srr(struct kvm_vcpu * vcpu,unsigned long srr0,u32 srr1)386 static void set_guest_srr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
387 {
388 	kvmppc_set_srr0(vcpu, srr0);
389 	kvmppc_set_srr1(vcpu, srr1);
390 }
391 
set_guest_csrr(struct kvm_vcpu * vcpu,unsigned long srr0,u32 srr1)392 static void set_guest_csrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
393 {
394 	vcpu->arch.csrr0 = srr0;
395 	vcpu->arch.csrr1 = srr1;
396 }
397 
set_guest_dsrr(struct kvm_vcpu * vcpu,unsigned long srr0,u32 srr1)398 static void set_guest_dsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
399 {
400 	if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC)) {
401 		vcpu->arch.dsrr0 = srr0;
402 		vcpu->arch.dsrr1 = srr1;
403 	} else {
404 		set_guest_csrr(vcpu, srr0, srr1);
405 	}
406 }
407 
set_guest_mcsrr(struct kvm_vcpu * vcpu,unsigned long srr0,u32 srr1)408 static void set_guest_mcsrr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1)
409 {
410 	vcpu->arch.mcsrr0 = srr0;
411 	vcpu->arch.mcsrr1 = srr1;
412 }
413 
414 /* Deliver the interrupt of the corresponding priority, if possible. */
kvmppc_booke_irqprio_deliver(struct kvm_vcpu * vcpu,unsigned int priority)415 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
416                                         unsigned int priority)
417 {
418 	int allowed = 0;
419 	ulong msr_mask = 0;
420 	bool update_esr = false, update_dear = false, update_epr = false;
421 	ulong crit_raw = vcpu->arch.shared->critical;
422 	ulong crit_r1 = kvmppc_get_gpr(vcpu, 1);
423 	bool crit;
424 	bool keep_irq = false;
425 	enum int_class int_class;
426 	ulong new_msr = vcpu->arch.shared->msr;
427 
428 	/* Truncate crit indicators in 32 bit mode */
429 	if (!(vcpu->arch.shared->msr & MSR_SF)) {
430 		crit_raw &= 0xffffffff;
431 		crit_r1 &= 0xffffffff;
432 	}
433 
434 	/* Critical section when crit == r1 */
435 	crit = (crit_raw == crit_r1);
436 	/* ... and we're in supervisor mode */
437 	crit = crit && !(vcpu->arch.shared->msr & MSR_PR);
438 
439 	if (priority == BOOKE_IRQPRIO_EXTERNAL_LEVEL) {
440 		priority = BOOKE_IRQPRIO_EXTERNAL;
441 		keep_irq = true;
442 	}
443 
444 	if ((priority == BOOKE_IRQPRIO_EXTERNAL) && vcpu->arch.epr_flags)
445 		update_epr = true;
446 
447 	switch (priority) {
448 	case BOOKE_IRQPRIO_DTLB_MISS:
449 	case BOOKE_IRQPRIO_DATA_STORAGE:
450 	case BOOKE_IRQPRIO_ALIGNMENT:
451 		update_dear = true;
452 		fallthrough;
453 	case BOOKE_IRQPRIO_INST_STORAGE:
454 	case BOOKE_IRQPRIO_PROGRAM:
455 		update_esr = true;
456 		fallthrough;
457 	case BOOKE_IRQPRIO_ITLB_MISS:
458 	case BOOKE_IRQPRIO_SYSCALL:
459 	case BOOKE_IRQPRIO_FP_UNAVAIL:
460 #ifdef CONFIG_SPE_POSSIBLE
461 	case BOOKE_IRQPRIO_SPE_UNAVAIL:
462 	case BOOKE_IRQPRIO_SPE_FP_DATA:
463 	case BOOKE_IRQPRIO_SPE_FP_ROUND:
464 #endif
465 #ifdef CONFIG_ALTIVEC
466 	case BOOKE_IRQPRIO_ALTIVEC_UNAVAIL:
467 	case BOOKE_IRQPRIO_ALTIVEC_ASSIST:
468 #endif
469 	case BOOKE_IRQPRIO_AP_UNAVAIL:
470 		allowed = 1;
471 		msr_mask = MSR_CE | MSR_ME | MSR_DE;
472 		int_class = INT_CLASS_NONCRIT;
473 		break;
474 	case BOOKE_IRQPRIO_WATCHDOG:
475 	case BOOKE_IRQPRIO_CRITICAL:
476 	case BOOKE_IRQPRIO_DBELL_CRIT:
477 		allowed = vcpu->arch.shared->msr & MSR_CE;
478 		allowed = allowed && !crit;
479 		msr_mask = MSR_ME;
480 		int_class = INT_CLASS_CRIT;
481 		break;
482 	case BOOKE_IRQPRIO_MACHINE_CHECK:
483 		allowed = vcpu->arch.shared->msr & MSR_ME;
484 		allowed = allowed && !crit;
485 		int_class = INT_CLASS_MC;
486 		break;
487 	case BOOKE_IRQPRIO_DECREMENTER:
488 	case BOOKE_IRQPRIO_FIT:
489 		keep_irq = true;
490 		fallthrough;
491 	case BOOKE_IRQPRIO_EXTERNAL:
492 	case BOOKE_IRQPRIO_DBELL:
493 		allowed = vcpu->arch.shared->msr & MSR_EE;
494 		allowed = allowed && !crit;
495 		msr_mask = MSR_CE | MSR_ME | MSR_DE;
496 		int_class = INT_CLASS_NONCRIT;
497 		break;
498 	case BOOKE_IRQPRIO_DEBUG:
499 		allowed = vcpu->arch.shared->msr & MSR_DE;
500 		allowed = allowed && !crit;
501 		msr_mask = MSR_ME;
502 		if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC))
503 			int_class = INT_CLASS_DBG;
504 		else
505 			int_class = INT_CLASS_CRIT;
506 
507 		break;
508 	}
509 
510 	if (allowed) {
511 		switch (int_class) {
512 		case INT_CLASS_NONCRIT:
513 			set_guest_srr(vcpu, vcpu->arch.regs.nip,
514 				      vcpu->arch.shared->msr);
515 			break;
516 		case INT_CLASS_CRIT:
517 			set_guest_csrr(vcpu, vcpu->arch.regs.nip,
518 				       vcpu->arch.shared->msr);
519 			break;
520 		case INT_CLASS_DBG:
521 			set_guest_dsrr(vcpu, vcpu->arch.regs.nip,
522 				       vcpu->arch.shared->msr);
523 			break;
524 		case INT_CLASS_MC:
525 			set_guest_mcsrr(vcpu, vcpu->arch.regs.nip,
526 					vcpu->arch.shared->msr);
527 			break;
528 		}
529 
530 		vcpu->arch.regs.nip = vcpu->arch.ivpr |
531 					vcpu->arch.ivor[priority];
532 		if (update_esr)
533 			kvmppc_set_esr(vcpu, vcpu->arch.queued_esr);
534 		if (update_dear)
535 			kvmppc_set_dar(vcpu, vcpu->arch.queued_dear);
536 		if (update_epr) {
537 			if (vcpu->arch.epr_flags & KVMPPC_EPR_USER)
538 				kvm_make_request(KVM_REQ_EPR_EXIT, vcpu);
539 			else if (vcpu->arch.epr_flags & KVMPPC_EPR_KERNEL) {
540 				BUG_ON(vcpu->arch.irq_type != KVMPPC_IRQ_MPIC);
541 				kvmppc_mpic_set_epr(vcpu);
542 			}
543 		}
544 
545 		new_msr &= msr_mask;
546 #if defined(CONFIG_64BIT)
547 		if (vcpu->arch.epcr & SPRN_EPCR_ICM)
548 			new_msr |= MSR_CM;
549 #endif
550 		kvmppc_set_msr(vcpu, new_msr);
551 
552 		if (!keep_irq)
553 			clear_bit(priority, &vcpu->arch.pending_exceptions);
554 	}
555 
556 #ifdef CONFIG_KVM_BOOKE_HV
557 	/*
558 	 * If an interrupt is pending but masked, raise a guest doorbell
559 	 * so that we are notified when the guest enables the relevant
560 	 * MSR bit.
561 	 */
562 	if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_EE)
563 		kvmppc_set_pending_interrupt(vcpu, INT_CLASS_NONCRIT);
564 	if (vcpu->arch.pending_exceptions & BOOKE_IRQMASK_CE)
565 		kvmppc_set_pending_interrupt(vcpu, INT_CLASS_CRIT);
566 	if (vcpu->arch.pending_exceptions & BOOKE_IRQPRIO_MACHINE_CHECK)
567 		kvmppc_set_pending_interrupt(vcpu, INT_CLASS_MC);
568 #endif
569 
570 	return allowed;
571 }
572 
573 /*
574  * Return the number of jiffies until the next timeout.  If the timeout is
575  * longer than the NEXT_TIMER_MAX_DELTA, then return NEXT_TIMER_MAX_DELTA
576  * because the larger value can break the timer APIs.
577  */
watchdog_next_timeout(struct kvm_vcpu * vcpu)578 static unsigned long watchdog_next_timeout(struct kvm_vcpu *vcpu)
579 {
580 	u64 tb, wdt_tb, wdt_ticks = 0;
581 	u64 nr_jiffies = 0;
582 	u32 period = TCR_GET_WP(vcpu->arch.tcr);
583 
584 	wdt_tb = 1ULL << (63 - period);
585 	tb = get_tb();
586 	/*
587 	 * The watchdog timeout will hapeen when TB bit corresponding
588 	 * to watchdog will toggle from 0 to 1.
589 	 */
590 	if (tb & wdt_tb)
591 		wdt_ticks = wdt_tb;
592 
593 	wdt_ticks += wdt_tb - (tb & (wdt_tb - 1));
594 
595 	/* Convert timebase ticks to jiffies */
596 	nr_jiffies = wdt_ticks;
597 
598 	if (do_div(nr_jiffies, tb_ticks_per_jiffy))
599 		nr_jiffies++;
600 
601 	return min_t(unsigned long long, nr_jiffies, NEXT_TIMER_MAX_DELTA);
602 }
603 
arm_next_watchdog(struct kvm_vcpu * vcpu)604 static void arm_next_watchdog(struct kvm_vcpu *vcpu)
605 {
606 	unsigned long nr_jiffies;
607 	unsigned long flags;
608 
609 	/*
610 	 * If TSR_ENW and TSR_WIS are not set then no need to exit to
611 	 * userspace, so clear the KVM_REQ_WATCHDOG request.
612 	 */
613 	if ((vcpu->arch.tsr & (TSR_ENW | TSR_WIS)) != (TSR_ENW | TSR_WIS))
614 		kvm_clear_request(KVM_REQ_WATCHDOG, vcpu);
615 
616 	spin_lock_irqsave(&vcpu->arch.wdt_lock, flags);
617 	nr_jiffies = watchdog_next_timeout(vcpu);
618 	/*
619 	 * If the number of jiffies of watchdog timer >= NEXT_TIMER_MAX_DELTA
620 	 * then do not run the watchdog timer as this can break timer APIs.
621 	 */
622 	if (nr_jiffies < NEXT_TIMER_MAX_DELTA)
623 		mod_timer(&vcpu->arch.wdt_timer, jiffies + nr_jiffies);
624 	else
625 		del_timer(&vcpu->arch.wdt_timer);
626 	spin_unlock_irqrestore(&vcpu->arch.wdt_lock, flags);
627 }
628 
kvmppc_watchdog_func(struct timer_list * t)629 static void kvmppc_watchdog_func(struct timer_list *t)
630 {
631 	struct kvm_vcpu *vcpu = from_timer(vcpu, t, arch.wdt_timer);
632 	u32 tsr, new_tsr;
633 	int final;
634 
635 	do {
636 		new_tsr = tsr = vcpu->arch.tsr;
637 		final = 0;
638 
639 		/* Time out event */
640 		if (tsr & TSR_ENW) {
641 			if (tsr & TSR_WIS)
642 				final = 1;
643 			else
644 				new_tsr = tsr | TSR_WIS;
645 		} else {
646 			new_tsr = tsr | TSR_ENW;
647 		}
648 	} while (cmpxchg(&vcpu->arch.tsr, tsr, new_tsr) != tsr);
649 
650 	if (new_tsr & TSR_WIS) {
651 		smp_wmb();
652 		kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
653 		kvm_vcpu_kick(vcpu);
654 	}
655 
656 	/*
657 	 * If this is final watchdog expiry and some action is required
658 	 * then exit to userspace.
659 	 */
660 	if (final && (vcpu->arch.tcr & TCR_WRC_MASK) &&
661 	    vcpu->arch.watchdog_enabled) {
662 		smp_wmb();
663 		kvm_make_request(KVM_REQ_WATCHDOG, vcpu);
664 		kvm_vcpu_kick(vcpu);
665 	}
666 
667 	/*
668 	 * Stop running the watchdog timer after final expiration to
669 	 * prevent the host from being flooded with timers if the
670 	 * guest sets a short period.
671 	 * Timers will resume when TSR/TCR is updated next time.
672 	 */
673 	if (!final)
674 		arm_next_watchdog(vcpu);
675 }
676 
update_timer_ints(struct kvm_vcpu * vcpu)677 static void update_timer_ints(struct kvm_vcpu *vcpu)
678 {
679 	if ((vcpu->arch.tcr & TCR_DIE) && (vcpu->arch.tsr & TSR_DIS))
680 		kvmppc_core_queue_dec(vcpu);
681 	else
682 		kvmppc_core_dequeue_dec(vcpu);
683 
684 	if ((vcpu->arch.tcr & TCR_WIE) && (vcpu->arch.tsr & TSR_WIS))
685 		kvmppc_core_queue_watchdog(vcpu);
686 	else
687 		kvmppc_core_dequeue_watchdog(vcpu);
688 }
689 
kvmppc_core_check_exceptions(struct kvm_vcpu * vcpu)690 static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu)
691 {
692 	unsigned long *pending = &vcpu->arch.pending_exceptions;
693 	unsigned int priority;
694 
695 	priority = __ffs(*pending);
696 	while (priority < BOOKE_IRQPRIO_MAX) {
697 		if (kvmppc_booke_irqprio_deliver(vcpu, priority))
698 			break;
699 
700 		priority = find_next_bit(pending,
701 		                         BITS_PER_BYTE * sizeof(*pending),
702 		                         priority + 1);
703 	}
704 
705 	/* Tell the guest about our interrupt status */
706 	vcpu->arch.shared->int_pending = !!*pending;
707 }
708 
709 /* Check pending exceptions and deliver one, if possible. */
kvmppc_core_prepare_to_enter(struct kvm_vcpu * vcpu)710 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
711 {
712 	int r = 0;
713 	WARN_ON_ONCE(!irqs_disabled());
714 
715 	kvmppc_core_check_exceptions(vcpu);
716 
717 	if (kvm_request_pending(vcpu)) {
718 		/* Exception delivery raised request; start over */
719 		return 1;
720 	}
721 
722 	if (vcpu->arch.shared->msr & MSR_WE) {
723 		local_irq_enable();
724 		kvm_vcpu_halt(vcpu);
725 		hard_irq_disable();
726 
727 		kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS);
728 		r = 1;
729 	}
730 
731 	return r;
732 }
733 
kvmppc_core_check_requests(struct kvm_vcpu * vcpu)734 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
735 {
736 	int r = 1; /* Indicate we want to get back into the guest */
737 
738 	if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu))
739 		update_timer_ints(vcpu);
740 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
741 	if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu))
742 		kvmppc_core_flush_tlb(vcpu);
743 #endif
744 
745 	if (kvm_check_request(KVM_REQ_WATCHDOG, vcpu)) {
746 		vcpu->run->exit_reason = KVM_EXIT_WATCHDOG;
747 		r = 0;
748 	}
749 
750 	if (kvm_check_request(KVM_REQ_EPR_EXIT, vcpu)) {
751 		vcpu->run->epr.epr = 0;
752 		vcpu->arch.epr_needed = true;
753 		vcpu->run->exit_reason = KVM_EXIT_EPR;
754 		r = 0;
755 	}
756 
757 	return r;
758 }
759 
kvmppc_vcpu_run(struct kvm_vcpu * vcpu)760 int kvmppc_vcpu_run(struct kvm_vcpu *vcpu)
761 {
762 	int ret, s;
763 	struct debug_reg debug;
764 
765 	if (!vcpu->arch.sane) {
766 		vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
767 		return -EINVAL;
768 	}
769 
770 	s = kvmppc_prepare_to_enter(vcpu);
771 	if (s <= 0) {
772 		ret = s;
773 		goto out;
774 	}
775 	/* interrupts now hard-disabled */
776 
777 #ifdef CONFIG_PPC_FPU
778 	/* Save userspace FPU state in stack */
779 	enable_kernel_fp();
780 
781 	/*
782 	 * Since we can't trap on MSR_FP in GS-mode, we consider the guest
783 	 * as always using the FPU.
784 	 */
785 	kvmppc_load_guest_fp(vcpu);
786 #endif
787 
788 #ifdef CONFIG_ALTIVEC
789 	/* Save userspace AltiVec state in stack */
790 	if (cpu_has_feature(CPU_FTR_ALTIVEC))
791 		enable_kernel_altivec();
792 	/*
793 	 * Since we can't trap on MSR_VEC in GS-mode, we consider the guest
794 	 * as always using the AltiVec.
795 	 */
796 	kvmppc_load_guest_altivec(vcpu);
797 #endif
798 
799 	/* Switch to guest debug context */
800 	debug = vcpu->arch.dbg_reg;
801 	switch_booke_debug_regs(&debug);
802 	debug = current->thread.debug;
803 	current->thread.debug = vcpu->arch.dbg_reg;
804 
805 	vcpu->arch.pgdir = vcpu->kvm->mm->pgd;
806 	kvmppc_fix_ee_before_entry();
807 
808 	ret = __kvmppc_vcpu_run(vcpu);
809 
810 	/* No need for guest_exit. It's done in handle_exit.
811 	   We also get here with interrupts enabled. */
812 
813 	/* Switch back to user space debug context */
814 	switch_booke_debug_regs(&debug);
815 	current->thread.debug = debug;
816 
817 #ifdef CONFIG_PPC_FPU
818 	kvmppc_save_guest_fp(vcpu);
819 #endif
820 
821 #ifdef CONFIG_ALTIVEC
822 	kvmppc_save_guest_altivec(vcpu);
823 #endif
824 
825 out:
826 	vcpu->mode = OUTSIDE_GUEST_MODE;
827 	return ret;
828 }
829 
emulation_exit(struct kvm_vcpu * vcpu)830 static int emulation_exit(struct kvm_vcpu *vcpu)
831 {
832 	enum emulation_result er;
833 
834 	er = kvmppc_emulate_instruction(vcpu);
835 	switch (er) {
836 	case EMULATE_DONE:
837 		/* don't overwrite subtypes, just account kvm_stats */
838 		kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
839 		/* Future optimization: only reload non-volatiles if
840 		 * they were actually modified by emulation. */
841 		return RESUME_GUEST_NV;
842 
843 	case EMULATE_AGAIN:
844 		return RESUME_GUEST;
845 
846 	case EMULATE_FAIL:
847 		printk(KERN_CRIT "%s: emulation at %lx failed (%08lx)\n",
848 		       __func__, vcpu->arch.regs.nip, vcpu->arch.last_inst);
849 		/* For debugging, encode the failing instruction and
850 		 * report it to userspace. */
851 		vcpu->run->hw.hardware_exit_reason = ~0ULL << 32;
852 		vcpu->run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
853 		kvmppc_core_queue_program(vcpu, ESR_PIL);
854 		return RESUME_HOST;
855 
856 	case EMULATE_EXIT_USER:
857 		return RESUME_HOST;
858 
859 	default:
860 		BUG();
861 	}
862 }
863 
kvmppc_handle_debug(struct kvm_vcpu * vcpu)864 static int kvmppc_handle_debug(struct kvm_vcpu *vcpu)
865 {
866 	struct kvm_run *run = vcpu->run;
867 	struct debug_reg *dbg_reg = &(vcpu->arch.dbg_reg);
868 	u32 dbsr = vcpu->arch.dbsr;
869 
870 	if (vcpu->guest_debug == 0) {
871 		/*
872 		 * Debug resources belong to Guest.
873 		 * Imprecise debug event is not injected
874 		 */
875 		if (dbsr & DBSR_IDE) {
876 			dbsr &= ~DBSR_IDE;
877 			if (!dbsr)
878 				return RESUME_GUEST;
879 		}
880 
881 		if (dbsr && (vcpu->arch.shared->msr & MSR_DE) &&
882 			    (vcpu->arch.dbg_reg.dbcr0 & DBCR0_IDM))
883 			kvmppc_core_queue_debug(vcpu);
884 
885 		/* Inject a program interrupt if trap debug is not allowed */
886 		if ((dbsr & DBSR_TIE) && !(vcpu->arch.shared->msr & MSR_DE))
887 			kvmppc_core_queue_program(vcpu, ESR_PTR);
888 
889 		return RESUME_GUEST;
890 	}
891 
892 	/*
893 	 * Debug resource owned by userspace.
894 	 * Clear guest dbsr (vcpu->arch.dbsr)
895 	 */
896 	vcpu->arch.dbsr = 0;
897 	run->debug.arch.status = 0;
898 	run->debug.arch.address = vcpu->arch.regs.nip;
899 
900 	if (dbsr & (DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4)) {
901 		run->debug.arch.status |= KVMPPC_DEBUG_BREAKPOINT;
902 	} else {
903 		if (dbsr & (DBSR_DAC1W | DBSR_DAC2W))
904 			run->debug.arch.status |= KVMPPC_DEBUG_WATCH_WRITE;
905 		else if (dbsr & (DBSR_DAC1R | DBSR_DAC2R))
906 			run->debug.arch.status |= KVMPPC_DEBUG_WATCH_READ;
907 		if (dbsr & (DBSR_DAC1R | DBSR_DAC1W))
908 			run->debug.arch.address = dbg_reg->dac1;
909 		else if (dbsr & (DBSR_DAC2R | DBSR_DAC2W))
910 			run->debug.arch.address = dbg_reg->dac2;
911 	}
912 
913 	return RESUME_HOST;
914 }
915 
kvmppc_fill_pt_regs(struct pt_regs * regs)916 static void kvmppc_fill_pt_regs(struct pt_regs *regs)
917 {
918 	ulong r1, msr, lr;
919 
920 	asm("mr %0, 1" : "=r"(r1));
921 	asm("mflr %0" : "=r"(lr));
922 	asm("mfmsr %0" : "=r"(msr));
923 
924 	memset(regs, 0, sizeof(*regs));
925 	regs->gpr[1] = r1;
926 	regs->nip = _THIS_IP_;
927 	regs->msr = msr;
928 	regs->link = lr;
929 }
930 
931 /*
932  * For interrupts needed to be handled by host interrupt handlers,
933  * corresponding host handler are called from here in similar way
934  * (but not exact) as they are called from low level handler
935  * (such as from arch/powerpc/kernel/head_fsl_booke.S).
936  */
kvmppc_restart_interrupt(struct kvm_vcpu * vcpu,unsigned int exit_nr)937 static void kvmppc_restart_interrupt(struct kvm_vcpu *vcpu,
938 				     unsigned int exit_nr)
939 {
940 	struct pt_regs regs;
941 
942 	switch (exit_nr) {
943 	case BOOKE_INTERRUPT_EXTERNAL:
944 		kvmppc_fill_pt_regs(&regs);
945 		do_IRQ(&regs);
946 		break;
947 	case BOOKE_INTERRUPT_DECREMENTER:
948 		kvmppc_fill_pt_regs(&regs);
949 		timer_interrupt(&regs);
950 		break;
951 #if defined(CONFIG_PPC_DOORBELL)
952 	case BOOKE_INTERRUPT_DOORBELL:
953 		kvmppc_fill_pt_regs(&regs);
954 		doorbell_exception(&regs);
955 		break;
956 #endif
957 	case BOOKE_INTERRUPT_MACHINE_CHECK:
958 		/* FIXME */
959 		break;
960 	case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
961 		kvmppc_fill_pt_regs(&regs);
962 		performance_monitor_exception(&regs);
963 		break;
964 	case BOOKE_INTERRUPT_WATCHDOG:
965 		kvmppc_fill_pt_regs(&regs);
966 #ifdef CONFIG_BOOKE_WDT
967 		WatchdogException(&regs);
968 #else
969 		unknown_exception(&regs);
970 #endif
971 		break;
972 	case BOOKE_INTERRUPT_CRITICAL:
973 		kvmppc_fill_pt_regs(&regs);
974 		unknown_exception(&regs);
975 		break;
976 	case BOOKE_INTERRUPT_DEBUG:
977 		/* Save DBSR before preemption is enabled */
978 		vcpu->arch.dbsr = mfspr(SPRN_DBSR);
979 		kvmppc_clear_dbsr();
980 		break;
981 	}
982 }
983 
kvmppc_resume_inst_load(struct kvm_vcpu * vcpu,enum emulation_result emulated,u32 last_inst)984 static int kvmppc_resume_inst_load(struct kvm_vcpu *vcpu,
985 				  enum emulation_result emulated, u32 last_inst)
986 {
987 	switch (emulated) {
988 	case EMULATE_AGAIN:
989 		return RESUME_GUEST;
990 
991 	case EMULATE_FAIL:
992 		pr_debug("%s: load instruction from guest address %lx failed\n",
993 		       __func__, vcpu->arch.regs.nip);
994 		/* For debugging, encode the failing instruction and
995 		 * report it to userspace. */
996 		vcpu->run->hw.hardware_exit_reason = ~0ULL << 32;
997 		vcpu->run->hw.hardware_exit_reason |= last_inst;
998 		kvmppc_core_queue_program(vcpu, ESR_PIL);
999 		return RESUME_HOST;
1000 
1001 	default:
1002 		BUG();
1003 	}
1004 }
1005 
1006 /*
1007  * kvmppc_handle_exit
1008  *
1009  * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
1010  */
kvmppc_handle_exit(struct kvm_vcpu * vcpu,unsigned int exit_nr)1011 int kvmppc_handle_exit(struct kvm_vcpu *vcpu, unsigned int exit_nr)
1012 {
1013 	struct kvm_run *run = vcpu->run;
1014 	int r = RESUME_HOST;
1015 	int s;
1016 	int idx;
1017 	u32 last_inst = KVM_INST_FETCH_FAILED;
1018 	ppc_inst_t pinst;
1019 	enum emulation_result emulated = EMULATE_DONE;
1020 
1021 	/* Fix irq state (pairs with kvmppc_fix_ee_before_entry()) */
1022 	kvmppc_fix_ee_after_exit();
1023 
1024 	/* update before a new last_exit_type is rewritten */
1025 	kvmppc_update_timing_stats(vcpu);
1026 
1027 	/* restart interrupts if they were meant for the host */
1028 	kvmppc_restart_interrupt(vcpu, exit_nr);
1029 
1030 	/*
1031 	 * get last instruction before being preempted
1032 	 * TODO: for e6500 check also BOOKE_INTERRUPT_LRAT_ERROR & ESR_DATA
1033 	 */
1034 	switch (exit_nr) {
1035 	case BOOKE_INTERRUPT_DATA_STORAGE:
1036 	case BOOKE_INTERRUPT_DTLB_MISS:
1037 	case BOOKE_INTERRUPT_HV_PRIV:
1038 		emulated = kvmppc_get_last_inst(vcpu, INST_GENERIC, &pinst);
1039 		last_inst = ppc_inst_val(pinst);
1040 		break;
1041 	case BOOKE_INTERRUPT_PROGRAM:
1042 		/* SW breakpoints arrive as illegal instructions on HV */
1043 		if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) {
1044 			emulated = kvmppc_get_last_inst(vcpu, INST_GENERIC, &pinst);
1045 			last_inst = ppc_inst_val(pinst);
1046 		}
1047 		break;
1048 	default:
1049 		break;
1050 	}
1051 
1052 	trace_kvm_exit(exit_nr, vcpu);
1053 
1054 	context_tracking_guest_exit();
1055 	if (!vtime_accounting_enabled_this_cpu()) {
1056 		local_irq_enable();
1057 		/*
1058 		 * Service IRQs here before vtime_account_guest_exit() so any
1059 		 * ticks that occurred while running the guest are accounted to
1060 		 * the guest. If vtime accounting is enabled, accounting uses
1061 		 * TB rather than ticks, so it can be done without enabling
1062 		 * interrupts here, which has the problem that it accounts
1063 		 * interrupt processing overhead to the host.
1064 		 */
1065 		local_irq_disable();
1066 	}
1067 	vtime_account_guest_exit();
1068 
1069 	local_irq_enable();
1070 
1071 	run->exit_reason = KVM_EXIT_UNKNOWN;
1072 	run->ready_for_interrupt_injection = 1;
1073 
1074 	if (emulated != EMULATE_DONE) {
1075 		r = kvmppc_resume_inst_load(vcpu, emulated, last_inst);
1076 		goto out;
1077 	}
1078 
1079 	switch (exit_nr) {
1080 	case BOOKE_INTERRUPT_MACHINE_CHECK:
1081 		printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
1082 		kvmppc_dump_vcpu(vcpu);
1083 		/* For debugging, send invalid exit reason to user space */
1084 		run->hw.hardware_exit_reason = ~1ULL << 32;
1085 		run->hw.hardware_exit_reason |= mfspr(SPRN_MCSR);
1086 		r = RESUME_HOST;
1087 		break;
1088 
1089 	case BOOKE_INTERRUPT_EXTERNAL:
1090 		kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
1091 		r = RESUME_GUEST;
1092 		break;
1093 
1094 	case BOOKE_INTERRUPT_DECREMENTER:
1095 		kvmppc_account_exit(vcpu, DEC_EXITS);
1096 		r = RESUME_GUEST;
1097 		break;
1098 
1099 	case BOOKE_INTERRUPT_WATCHDOG:
1100 		r = RESUME_GUEST;
1101 		break;
1102 
1103 	case BOOKE_INTERRUPT_DOORBELL:
1104 		kvmppc_account_exit(vcpu, DBELL_EXITS);
1105 		r = RESUME_GUEST;
1106 		break;
1107 
1108 	case BOOKE_INTERRUPT_GUEST_DBELL_CRIT:
1109 		kvmppc_account_exit(vcpu, GDBELL_EXITS);
1110 
1111 		/*
1112 		 * We are here because there is a pending guest interrupt
1113 		 * which could not be delivered as MSR_CE or MSR_ME was not
1114 		 * set.  Once we break from here we will retry delivery.
1115 		 */
1116 		r = RESUME_GUEST;
1117 		break;
1118 
1119 	case BOOKE_INTERRUPT_GUEST_DBELL:
1120 		kvmppc_account_exit(vcpu, GDBELL_EXITS);
1121 
1122 		/*
1123 		 * We are here because there is a pending guest interrupt
1124 		 * which could not be delivered as MSR_EE was not set.  Once
1125 		 * we break from here we will retry delivery.
1126 		 */
1127 		r = RESUME_GUEST;
1128 		break;
1129 
1130 	case BOOKE_INTERRUPT_PERFORMANCE_MONITOR:
1131 		r = RESUME_GUEST;
1132 		break;
1133 
1134 	case BOOKE_INTERRUPT_HV_PRIV:
1135 		r = emulation_exit(vcpu);
1136 		break;
1137 
1138 	case BOOKE_INTERRUPT_PROGRAM:
1139 		if ((vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) &&
1140 			(last_inst == KVMPPC_INST_SW_BREAKPOINT)) {
1141 			/*
1142 			 * We are here because of an SW breakpoint instr,
1143 			 * so lets return to host to handle.
1144 			 */
1145 			r = kvmppc_handle_debug(vcpu);
1146 			run->exit_reason = KVM_EXIT_DEBUG;
1147 			kvmppc_account_exit(vcpu, DEBUG_EXITS);
1148 			break;
1149 		}
1150 
1151 		if (vcpu->arch.shared->msr & (MSR_PR | MSR_GS)) {
1152 			/*
1153 			 * Program traps generated by user-level software must
1154 			 * be handled by the guest kernel.
1155 			 *
1156 			 * In GS mode, hypervisor privileged instructions trap
1157 			 * on BOOKE_INTERRUPT_HV_PRIV, not here, so these are
1158 			 * actual program interrupts, handled by the guest.
1159 			 */
1160 			kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
1161 			r = RESUME_GUEST;
1162 			kvmppc_account_exit(vcpu, USR_PR_INST);
1163 			break;
1164 		}
1165 
1166 		r = emulation_exit(vcpu);
1167 		break;
1168 
1169 	case BOOKE_INTERRUPT_FP_UNAVAIL:
1170 		kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
1171 		kvmppc_account_exit(vcpu, FP_UNAVAIL);
1172 		r = RESUME_GUEST;
1173 		break;
1174 
1175 #ifdef CONFIG_SPE
1176 	case BOOKE_INTERRUPT_SPE_UNAVAIL: {
1177 		if (vcpu->arch.shared->msr & MSR_SPE)
1178 			kvmppc_vcpu_enable_spe(vcpu);
1179 		else
1180 			kvmppc_booke_queue_irqprio(vcpu,
1181 						   BOOKE_IRQPRIO_SPE_UNAVAIL);
1182 		r = RESUME_GUEST;
1183 		break;
1184 	}
1185 
1186 	case BOOKE_INTERRUPT_SPE_FP_DATA:
1187 		kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
1188 		r = RESUME_GUEST;
1189 		break;
1190 
1191 	case BOOKE_INTERRUPT_SPE_FP_ROUND:
1192 		kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
1193 		r = RESUME_GUEST;
1194 		break;
1195 #elif defined(CONFIG_SPE_POSSIBLE)
1196 	case BOOKE_INTERRUPT_SPE_UNAVAIL:
1197 		/*
1198 		 * Guest wants SPE, but host kernel doesn't support it.  Send
1199 		 * an "unimplemented operation" program check to the guest.
1200 		 */
1201 		kvmppc_core_queue_program(vcpu, ESR_PUO | ESR_SPV);
1202 		r = RESUME_GUEST;
1203 		break;
1204 
1205 	/*
1206 	 * These really should never happen without CONFIG_SPE,
1207 	 * as we should never enable the real MSR[SPE] in the guest.
1208 	 */
1209 	case BOOKE_INTERRUPT_SPE_FP_DATA:
1210 	case BOOKE_INTERRUPT_SPE_FP_ROUND:
1211 		printk(KERN_CRIT "%s: unexpected SPE interrupt %u at %08lx\n",
1212 		       __func__, exit_nr, vcpu->arch.regs.nip);
1213 		run->hw.hardware_exit_reason = exit_nr;
1214 		r = RESUME_HOST;
1215 		break;
1216 #endif /* CONFIG_SPE_POSSIBLE */
1217 
1218 /*
1219  * On cores with Vector category, KVM is loaded only if CONFIG_ALTIVEC,
1220  * see kvmppc_e500mc_check_processor_compat().
1221  */
1222 #ifdef CONFIG_ALTIVEC
1223 	case BOOKE_INTERRUPT_ALTIVEC_UNAVAIL:
1224 		kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_UNAVAIL);
1225 		r = RESUME_GUEST;
1226 		break;
1227 
1228 	case BOOKE_INTERRUPT_ALTIVEC_ASSIST:
1229 		kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ALTIVEC_ASSIST);
1230 		r = RESUME_GUEST;
1231 		break;
1232 #endif
1233 
1234 	case BOOKE_INTERRUPT_DATA_STORAGE:
1235 		kvmppc_core_queue_data_storage(vcpu, 0, vcpu->arch.fault_dear,
1236 		                               vcpu->arch.fault_esr);
1237 		kvmppc_account_exit(vcpu, DSI_EXITS);
1238 		r = RESUME_GUEST;
1239 		break;
1240 
1241 	case BOOKE_INTERRUPT_INST_STORAGE:
1242 		kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr);
1243 		kvmppc_account_exit(vcpu, ISI_EXITS);
1244 		r = RESUME_GUEST;
1245 		break;
1246 
1247 	case BOOKE_INTERRUPT_ALIGNMENT:
1248 		kvmppc_core_queue_alignment(vcpu, vcpu->arch.fault_dear,
1249 		                            vcpu->arch.fault_esr);
1250 		r = RESUME_GUEST;
1251 		break;
1252 
1253 #ifdef CONFIG_KVM_BOOKE_HV
1254 	case BOOKE_INTERRUPT_HV_SYSCALL:
1255 		if (!(vcpu->arch.shared->msr & MSR_PR)) {
1256 			kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
1257 		} else {
1258 			/*
1259 			 * hcall from guest userspace -- send privileged
1260 			 * instruction program check.
1261 			 */
1262 			kvmppc_core_queue_program(vcpu, ESR_PPR);
1263 		}
1264 
1265 		r = RESUME_GUEST;
1266 		break;
1267 #else
1268 	case BOOKE_INTERRUPT_SYSCALL:
1269 		if (!(vcpu->arch.shared->msr & MSR_PR) &&
1270 		    (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
1271 			/* KVM PV hypercalls */
1272 			kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
1273 			r = RESUME_GUEST;
1274 		} else {
1275 			/* Guest syscalls */
1276 			kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
1277 		}
1278 		kvmppc_account_exit(vcpu, SYSCALL_EXITS);
1279 		r = RESUME_GUEST;
1280 		break;
1281 #endif
1282 
1283 	case BOOKE_INTERRUPT_DTLB_MISS: {
1284 		unsigned long eaddr = vcpu->arch.fault_dear;
1285 		int gtlb_index;
1286 		gpa_t gpaddr;
1287 		gfn_t gfn;
1288 
1289 #ifdef CONFIG_KVM_E500V2
1290 		if (!(vcpu->arch.shared->msr & MSR_PR) &&
1291 		    (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) {
1292 			kvmppc_map_magic(vcpu);
1293 			kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
1294 			r = RESUME_GUEST;
1295 
1296 			break;
1297 		}
1298 #endif
1299 
1300 		/* Check the guest TLB. */
1301 		gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
1302 		if (gtlb_index < 0) {
1303 			/* The guest didn't have a mapping for it. */
1304 			kvmppc_core_queue_dtlb_miss(vcpu,
1305 			                            vcpu->arch.fault_dear,
1306 			                            vcpu->arch.fault_esr);
1307 			kvmppc_mmu_dtlb_miss(vcpu);
1308 			kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
1309 			r = RESUME_GUEST;
1310 			break;
1311 		}
1312 
1313 		idx = srcu_read_lock(&vcpu->kvm->srcu);
1314 
1315 		gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
1316 		gfn = gpaddr >> PAGE_SHIFT;
1317 
1318 		if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
1319 			/* The guest TLB had a mapping, but the shadow TLB
1320 			 * didn't, and it is RAM. This could be because:
1321 			 * a) the entry is mapping the host kernel, or
1322 			 * b) the guest used a large mapping which we're faking
1323 			 * Either way, we need to satisfy the fault without
1324 			 * invoking the guest. */
1325 			kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
1326 			kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
1327 			r = RESUME_GUEST;
1328 		} else {
1329 			/* Guest has mapped and accessed a page which is not
1330 			 * actually RAM. */
1331 			vcpu->arch.paddr_accessed = gpaddr;
1332 			vcpu->arch.vaddr_accessed = eaddr;
1333 			r = kvmppc_emulate_mmio(vcpu);
1334 			kvmppc_account_exit(vcpu, MMIO_EXITS);
1335 		}
1336 
1337 		srcu_read_unlock(&vcpu->kvm->srcu, idx);
1338 		break;
1339 	}
1340 
1341 	case BOOKE_INTERRUPT_ITLB_MISS: {
1342 		unsigned long eaddr = vcpu->arch.regs.nip;
1343 		gpa_t gpaddr;
1344 		gfn_t gfn;
1345 		int gtlb_index;
1346 
1347 		r = RESUME_GUEST;
1348 
1349 		/* Check the guest TLB. */
1350 		gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
1351 		if (gtlb_index < 0) {
1352 			/* The guest didn't have a mapping for it. */
1353 			kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
1354 			kvmppc_mmu_itlb_miss(vcpu);
1355 			kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
1356 			break;
1357 		}
1358 
1359 		kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
1360 
1361 		idx = srcu_read_lock(&vcpu->kvm->srcu);
1362 
1363 		gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
1364 		gfn = gpaddr >> PAGE_SHIFT;
1365 
1366 		if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
1367 			/* The guest TLB had a mapping, but the shadow TLB
1368 			 * didn't. This could be because:
1369 			 * a) the entry is mapping the host kernel, or
1370 			 * b) the guest used a large mapping which we're faking
1371 			 * Either way, we need to satisfy the fault without
1372 			 * invoking the guest. */
1373 			kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
1374 		} else {
1375 			/* Guest mapped and leaped at non-RAM! */
1376 			kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
1377 		}
1378 
1379 		srcu_read_unlock(&vcpu->kvm->srcu, idx);
1380 		break;
1381 	}
1382 
1383 	case BOOKE_INTERRUPT_DEBUG: {
1384 		r = kvmppc_handle_debug(vcpu);
1385 		if (r == RESUME_HOST)
1386 			run->exit_reason = KVM_EXIT_DEBUG;
1387 		kvmppc_account_exit(vcpu, DEBUG_EXITS);
1388 		break;
1389 	}
1390 
1391 	default:
1392 		printk(KERN_EMERG "exit_nr %d\n", exit_nr);
1393 		BUG();
1394 	}
1395 
1396 out:
1397 	/*
1398 	 * To avoid clobbering exit_reason, only check for signals if we
1399 	 * aren't already exiting to userspace for some other reason.
1400 	 */
1401 	if (!(r & RESUME_HOST)) {
1402 		s = kvmppc_prepare_to_enter(vcpu);
1403 		if (s <= 0)
1404 			r = (s << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
1405 		else {
1406 			/* interrupts now hard-disabled */
1407 			kvmppc_fix_ee_before_entry();
1408 			kvmppc_load_guest_fp(vcpu);
1409 			kvmppc_load_guest_altivec(vcpu);
1410 		}
1411 	}
1412 
1413 	return r;
1414 }
1415 
kvmppc_set_tsr(struct kvm_vcpu * vcpu,u32 new_tsr)1416 static void kvmppc_set_tsr(struct kvm_vcpu *vcpu, u32 new_tsr)
1417 {
1418 	u32 old_tsr = vcpu->arch.tsr;
1419 
1420 	vcpu->arch.tsr = new_tsr;
1421 
1422 	if ((old_tsr ^ vcpu->arch.tsr) & (TSR_ENW | TSR_WIS))
1423 		arm_next_watchdog(vcpu);
1424 
1425 	update_timer_ints(vcpu);
1426 }
1427 
kvmppc_subarch_vcpu_init(struct kvm_vcpu * vcpu)1428 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
1429 {
1430 	/* setup watchdog timer once */
1431 	spin_lock_init(&vcpu->arch.wdt_lock);
1432 	timer_setup(&vcpu->arch.wdt_timer, kvmppc_watchdog_func, 0);
1433 
1434 	/*
1435 	 * Clear DBSR.MRR to avoid guest debug interrupt as
1436 	 * this is of host interest
1437 	 */
1438 	mtspr(SPRN_DBSR, DBSR_MRR);
1439 	return 0;
1440 }
1441 
kvmppc_subarch_vcpu_uninit(struct kvm_vcpu * vcpu)1442 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
1443 {
1444 	del_timer_sync(&vcpu->arch.wdt_timer);
1445 }
1446 
kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu * vcpu,struct kvm_regs * regs)1447 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1448 {
1449 	int i;
1450 
1451 	vcpu_load(vcpu);
1452 
1453 	regs->pc = vcpu->arch.regs.nip;
1454 	regs->cr = kvmppc_get_cr(vcpu);
1455 	regs->ctr = vcpu->arch.regs.ctr;
1456 	regs->lr = vcpu->arch.regs.link;
1457 	regs->xer = kvmppc_get_xer(vcpu);
1458 	regs->msr = vcpu->arch.shared->msr;
1459 	regs->srr0 = kvmppc_get_srr0(vcpu);
1460 	regs->srr1 = kvmppc_get_srr1(vcpu);
1461 	regs->pid = vcpu->arch.pid;
1462 	regs->sprg0 = kvmppc_get_sprg0(vcpu);
1463 	regs->sprg1 = kvmppc_get_sprg1(vcpu);
1464 	regs->sprg2 = kvmppc_get_sprg2(vcpu);
1465 	regs->sprg3 = kvmppc_get_sprg3(vcpu);
1466 	regs->sprg4 = kvmppc_get_sprg4(vcpu);
1467 	regs->sprg5 = kvmppc_get_sprg5(vcpu);
1468 	regs->sprg6 = kvmppc_get_sprg6(vcpu);
1469 	regs->sprg7 = kvmppc_get_sprg7(vcpu);
1470 
1471 	for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1472 		regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
1473 
1474 	vcpu_put(vcpu);
1475 	return 0;
1476 }
1477 
kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu * vcpu,struct kvm_regs * regs)1478 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1479 {
1480 	int i;
1481 
1482 	vcpu_load(vcpu);
1483 
1484 	vcpu->arch.regs.nip = regs->pc;
1485 	kvmppc_set_cr(vcpu, regs->cr);
1486 	vcpu->arch.regs.ctr = regs->ctr;
1487 	vcpu->arch.regs.link = regs->lr;
1488 	kvmppc_set_xer(vcpu, regs->xer);
1489 	kvmppc_set_msr(vcpu, regs->msr);
1490 	kvmppc_set_srr0(vcpu, regs->srr0);
1491 	kvmppc_set_srr1(vcpu, regs->srr1);
1492 	kvmppc_set_pid(vcpu, regs->pid);
1493 	kvmppc_set_sprg0(vcpu, regs->sprg0);
1494 	kvmppc_set_sprg1(vcpu, regs->sprg1);
1495 	kvmppc_set_sprg2(vcpu, regs->sprg2);
1496 	kvmppc_set_sprg3(vcpu, regs->sprg3);
1497 	kvmppc_set_sprg4(vcpu, regs->sprg4);
1498 	kvmppc_set_sprg5(vcpu, regs->sprg5);
1499 	kvmppc_set_sprg6(vcpu, regs->sprg6);
1500 	kvmppc_set_sprg7(vcpu, regs->sprg7);
1501 
1502 	for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1503 		kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
1504 
1505 	vcpu_put(vcpu);
1506 	return 0;
1507 }
1508 
get_sregs_base(struct kvm_vcpu * vcpu,struct kvm_sregs * sregs)1509 static void get_sregs_base(struct kvm_vcpu *vcpu,
1510                            struct kvm_sregs *sregs)
1511 {
1512 	u64 tb = get_tb();
1513 
1514 	sregs->u.e.features |= KVM_SREGS_E_BASE;
1515 
1516 	sregs->u.e.csrr0 = vcpu->arch.csrr0;
1517 	sregs->u.e.csrr1 = vcpu->arch.csrr1;
1518 	sregs->u.e.mcsr = vcpu->arch.mcsr;
1519 	sregs->u.e.esr = kvmppc_get_esr(vcpu);
1520 	sregs->u.e.dear = kvmppc_get_dar(vcpu);
1521 	sregs->u.e.tsr = vcpu->arch.tsr;
1522 	sregs->u.e.tcr = vcpu->arch.tcr;
1523 	sregs->u.e.dec = kvmppc_get_dec(vcpu, tb);
1524 	sregs->u.e.tb = tb;
1525 	sregs->u.e.vrsave = vcpu->arch.vrsave;
1526 }
1527 
set_sregs_base(struct kvm_vcpu * vcpu,struct kvm_sregs * sregs)1528 static int set_sregs_base(struct kvm_vcpu *vcpu,
1529                           struct kvm_sregs *sregs)
1530 {
1531 	if (!(sregs->u.e.features & KVM_SREGS_E_BASE))
1532 		return 0;
1533 
1534 	vcpu->arch.csrr0 = sregs->u.e.csrr0;
1535 	vcpu->arch.csrr1 = sregs->u.e.csrr1;
1536 	vcpu->arch.mcsr = sregs->u.e.mcsr;
1537 	kvmppc_set_esr(vcpu, sregs->u.e.esr);
1538 	kvmppc_set_dar(vcpu, sregs->u.e.dear);
1539 	vcpu->arch.vrsave = sregs->u.e.vrsave;
1540 	kvmppc_set_tcr(vcpu, sregs->u.e.tcr);
1541 
1542 	if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) {
1543 		vcpu->arch.dec = sregs->u.e.dec;
1544 		kvmppc_emulate_dec(vcpu);
1545 	}
1546 
1547 	if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR)
1548 		kvmppc_set_tsr(vcpu, sregs->u.e.tsr);
1549 
1550 	return 0;
1551 }
1552 
get_sregs_arch206(struct kvm_vcpu * vcpu,struct kvm_sregs * sregs)1553 static void get_sregs_arch206(struct kvm_vcpu *vcpu,
1554                               struct kvm_sregs *sregs)
1555 {
1556 	sregs->u.e.features |= KVM_SREGS_E_ARCH206;
1557 
1558 	sregs->u.e.pir = vcpu->vcpu_id;
1559 	sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0;
1560 	sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1;
1561 	sregs->u.e.decar = vcpu->arch.decar;
1562 	sregs->u.e.ivpr = vcpu->arch.ivpr;
1563 }
1564 
set_sregs_arch206(struct kvm_vcpu * vcpu,struct kvm_sregs * sregs)1565 static int set_sregs_arch206(struct kvm_vcpu *vcpu,
1566                              struct kvm_sregs *sregs)
1567 {
1568 	if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206))
1569 		return 0;
1570 
1571 	if (sregs->u.e.pir != vcpu->vcpu_id)
1572 		return -EINVAL;
1573 
1574 	vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0;
1575 	vcpu->arch.mcsrr1 = sregs->u.e.mcsrr1;
1576 	vcpu->arch.decar = sregs->u.e.decar;
1577 	vcpu->arch.ivpr = sregs->u.e.ivpr;
1578 
1579 	return 0;
1580 }
1581 
kvmppc_get_sregs_ivor(struct kvm_vcpu * vcpu,struct kvm_sregs * sregs)1582 int kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1583 {
1584 	sregs->u.e.features |= KVM_SREGS_E_IVOR;
1585 
1586 	sregs->u.e.ivor_low[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL];
1587 	sregs->u.e.ivor_low[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK];
1588 	sregs->u.e.ivor_low[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE];
1589 	sregs->u.e.ivor_low[3] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE];
1590 	sregs->u.e.ivor_low[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL];
1591 	sregs->u.e.ivor_low[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT];
1592 	sregs->u.e.ivor_low[6] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM];
1593 	sregs->u.e.ivor_low[7] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL];
1594 	sregs->u.e.ivor_low[8] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL];
1595 	sregs->u.e.ivor_low[9] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL];
1596 	sregs->u.e.ivor_low[10] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER];
1597 	sregs->u.e.ivor_low[11] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT];
1598 	sregs->u.e.ivor_low[12] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG];
1599 	sregs->u.e.ivor_low[13] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS];
1600 	sregs->u.e.ivor_low[14] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS];
1601 	sregs->u.e.ivor_low[15] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG];
1602 	return 0;
1603 }
1604 
kvmppc_set_sregs_ivor(struct kvm_vcpu * vcpu,struct kvm_sregs * sregs)1605 int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
1606 {
1607 	if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
1608 		return 0;
1609 
1610 	vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = sregs->u.e.ivor_low[0];
1611 	vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = sregs->u.e.ivor_low[1];
1612 	vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = sregs->u.e.ivor_low[2];
1613 	vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = sregs->u.e.ivor_low[3];
1614 	vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = sregs->u.e.ivor_low[4];
1615 	vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = sregs->u.e.ivor_low[5];
1616 	vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = sregs->u.e.ivor_low[6];
1617 	vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = sregs->u.e.ivor_low[7];
1618 	vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = sregs->u.e.ivor_low[8];
1619 	vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = sregs->u.e.ivor_low[9];
1620 	vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = sregs->u.e.ivor_low[10];
1621 	vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = sregs->u.e.ivor_low[11];
1622 	vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = sregs->u.e.ivor_low[12];
1623 	vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = sregs->u.e.ivor_low[13];
1624 	vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = sregs->u.e.ivor_low[14];
1625 	vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = sregs->u.e.ivor_low[15];
1626 
1627 	return 0;
1628 }
1629 
kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu * vcpu,struct kvm_sregs * sregs)1630 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1631                                   struct kvm_sregs *sregs)
1632 {
1633 	int ret;
1634 
1635 	vcpu_load(vcpu);
1636 
1637 	sregs->pvr = vcpu->arch.pvr;
1638 
1639 	get_sregs_base(vcpu, sregs);
1640 	get_sregs_arch206(vcpu, sregs);
1641 	ret = vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
1642 
1643 	vcpu_put(vcpu);
1644 	return ret;
1645 }
1646 
kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu * vcpu,struct kvm_sregs * sregs)1647 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1648                                   struct kvm_sregs *sregs)
1649 {
1650 	int ret = -EINVAL;
1651 
1652 	vcpu_load(vcpu);
1653 	if (vcpu->arch.pvr != sregs->pvr)
1654 		goto out;
1655 
1656 	ret = set_sregs_base(vcpu, sregs);
1657 	if (ret < 0)
1658 		goto out;
1659 
1660 	ret = set_sregs_arch206(vcpu, sregs);
1661 	if (ret < 0)
1662 		goto out;
1663 
1664 	ret = vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
1665 
1666 out:
1667 	vcpu_put(vcpu);
1668 	return ret;
1669 }
1670 
kvmppc_get_one_reg(struct kvm_vcpu * vcpu,u64 id,union kvmppc_one_reg * val)1671 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
1672 			union kvmppc_one_reg *val)
1673 {
1674 	int r = 0;
1675 
1676 	switch (id) {
1677 	case KVM_REG_PPC_IAC1:
1678 		*val = get_reg_val(id, vcpu->arch.dbg_reg.iac1);
1679 		break;
1680 	case KVM_REG_PPC_IAC2:
1681 		*val = get_reg_val(id, vcpu->arch.dbg_reg.iac2);
1682 		break;
1683 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
1684 	case KVM_REG_PPC_IAC3:
1685 		*val = get_reg_val(id, vcpu->arch.dbg_reg.iac3);
1686 		break;
1687 	case KVM_REG_PPC_IAC4:
1688 		*val = get_reg_val(id, vcpu->arch.dbg_reg.iac4);
1689 		break;
1690 #endif
1691 	case KVM_REG_PPC_DAC1:
1692 		*val = get_reg_val(id, vcpu->arch.dbg_reg.dac1);
1693 		break;
1694 	case KVM_REG_PPC_DAC2:
1695 		*val = get_reg_val(id, vcpu->arch.dbg_reg.dac2);
1696 		break;
1697 	case KVM_REG_PPC_EPR: {
1698 		u32 epr = kvmppc_get_epr(vcpu);
1699 		*val = get_reg_val(id, epr);
1700 		break;
1701 	}
1702 #if defined(CONFIG_64BIT)
1703 	case KVM_REG_PPC_EPCR:
1704 		*val = get_reg_val(id, vcpu->arch.epcr);
1705 		break;
1706 #endif
1707 	case KVM_REG_PPC_TCR:
1708 		*val = get_reg_val(id, vcpu->arch.tcr);
1709 		break;
1710 	case KVM_REG_PPC_TSR:
1711 		*val = get_reg_val(id, vcpu->arch.tsr);
1712 		break;
1713 	case KVM_REG_PPC_DEBUG_INST:
1714 		*val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT);
1715 		break;
1716 	case KVM_REG_PPC_VRSAVE:
1717 		*val = get_reg_val(id, vcpu->arch.vrsave);
1718 		break;
1719 	default:
1720 		r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val);
1721 		break;
1722 	}
1723 
1724 	return r;
1725 }
1726 
kvmppc_set_one_reg(struct kvm_vcpu * vcpu,u64 id,union kvmppc_one_reg * val)1727 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
1728 			union kvmppc_one_reg *val)
1729 {
1730 	int r = 0;
1731 
1732 	switch (id) {
1733 	case KVM_REG_PPC_IAC1:
1734 		vcpu->arch.dbg_reg.iac1 = set_reg_val(id, *val);
1735 		break;
1736 	case KVM_REG_PPC_IAC2:
1737 		vcpu->arch.dbg_reg.iac2 = set_reg_val(id, *val);
1738 		break;
1739 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
1740 	case KVM_REG_PPC_IAC3:
1741 		vcpu->arch.dbg_reg.iac3 = set_reg_val(id, *val);
1742 		break;
1743 	case KVM_REG_PPC_IAC4:
1744 		vcpu->arch.dbg_reg.iac4 = set_reg_val(id, *val);
1745 		break;
1746 #endif
1747 	case KVM_REG_PPC_DAC1:
1748 		vcpu->arch.dbg_reg.dac1 = set_reg_val(id, *val);
1749 		break;
1750 	case KVM_REG_PPC_DAC2:
1751 		vcpu->arch.dbg_reg.dac2 = set_reg_val(id, *val);
1752 		break;
1753 	case KVM_REG_PPC_EPR: {
1754 		u32 new_epr = set_reg_val(id, *val);
1755 		kvmppc_set_epr(vcpu, new_epr);
1756 		break;
1757 	}
1758 #if defined(CONFIG_64BIT)
1759 	case KVM_REG_PPC_EPCR: {
1760 		u32 new_epcr = set_reg_val(id, *val);
1761 		kvmppc_set_epcr(vcpu, new_epcr);
1762 		break;
1763 	}
1764 #endif
1765 	case KVM_REG_PPC_OR_TSR: {
1766 		u32 tsr_bits = set_reg_val(id, *val);
1767 		kvmppc_set_tsr_bits(vcpu, tsr_bits);
1768 		break;
1769 	}
1770 	case KVM_REG_PPC_CLEAR_TSR: {
1771 		u32 tsr_bits = set_reg_val(id, *val);
1772 		kvmppc_clr_tsr_bits(vcpu, tsr_bits);
1773 		break;
1774 	}
1775 	case KVM_REG_PPC_TSR: {
1776 		u32 tsr = set_reg_val(id, *val);
1777 		kvmppc_set_tsr(vcpu, tsr);
1778 		break;
1779 	}
1780 	case KVM_REG_PPC_TCR: {
1781 		u32 tcr = set_reg_val(id, *val);
1782 		kvmppc_set_tcr(vcpu, tcr);
1783 		break;
1784 	}
1785 	case KVM_REG_PPC_VRSAVE:
1786 		vcpu->arch.vrsave = set_reg_val(id, *val);
1787 		break;
1788 	default:
1789 		r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val);
1790 		break;
1791 	}
1792 
1793 	return r;
1794 }
1795 
kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu * vcpu,struct kvm_fpu * fpu)1796 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1797 {
1798 	return -EOPNOTSUPP;
1799 }
1800 
kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu * vcpu,struct kvm_fpu * fpu)1801 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1802 {
1803 	return -EOPNOTSUPP;
1804 }
1805 
kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu * vcpu,struct kvm_translation * tr)1806 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1807                                   struct kvm_translation *tr)
1808 {
1809 	int r;
1810 
1811 	vcpu_load(vcpu);
1812 	r = kvmppc_core_vcpu_translate(vcpu, tr);
1813 	vcpu_put(vcpu);
1814 	return r;
1815 }
1816 
kvm_arch_sync_dirty_log(struct kvm * kvm,struct kvm_memory_slot * memslot)1817 void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot)
1818 {
1819 
1820 }
1821 
kvm_vm_ioctl_get_dirty_log(struct kvm * kvm,struct kvm_dirty_log * log)1822 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
1823 {
1824 	return -EOPNOTSUPP;
1825 }
1826 
kvmppc_core_free_memslot(struct kvm * kvm,struct kvm_memory_slot * slot)1827 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot)
1828 {
1829 }
1830 
kvmppc_core_prepare_memory_region(struct kvm * kvm,const struct kvm_memory_slot * old,struct kvm_memory_slot * new,enum kvm_mr_change change)1831 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
1832 				      const struct kvm_memory_slot *old,
1833 				      struct kvm_memory_slot *new,
1834 				      enum kvm_mr_change change)
1835 {
1836 	return 0;
1837 }
1838 
kvmppc_core_commit_memory_region(struct kvm * kvm,struct kvm_memory_slot * old,const struct kvm_memory_slot * new,enum kvm_mr_change change)1839 void kvmppc_core_commit_memory_region(struct kvm *kvm,
1840 				struct kvm_memory_slot *old,
1841 				const struct kvm_memory_slot *new,
1842 				enum kvm_mr_change change)
1843 {
1844 }
1845 
kvmppc_core_flush_memslot(struct kvm * kvm,struct kvm_memory_slot * memslot)1846 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
1847 {
1848 }
1849 
kvmppc_set_epcr(struct kvm_vcpu * vcpu,u32 new_epcr)1850 void kvmppc_set_epcr(struct kvm_vcpu *vcpu, u32 new_epcr)
1851 {
1852 #if defined(CONFIG_64BIT)
1853 	vcpu->arch.epcr = new_epcr;
1854 #ifdef CONFIG_KVM_BOOKE_HV
1855 	vcpu->arch.shadow_epcr &= ~SPRN_EPCR_GICM;
1856 	if (vcpu->arch.epcr  & SPRN_EPCR_ICM)
1857 		vcpu->arch.shadow_epcr |= SPRN_EPCR_GICM;
1858 #endif
1859 #endif
1860 }
1861 
kvmppc_set_tcr(struct kvm_vcpu * vcpu,u32 new_tcr)1862 void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr)
1863 {
1864 	vcpu->arch.tcr = new_tcr;
1865 	arm_next_watchdog(vcpu);
1866 	update_timer_ints(vcpu);
1867 }
1868 
kvmppc_set_tsr_bits(struct kvm_vcpu * vcpu,u32 tsr_bits)1869 void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1870 {
1871 	set_bits(tsr_bits, &vcpu->arch.tsr);
1872 	smp_wmb();
1873 	kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
1874 	kvm_vcpu_kick(vcpu);
1875 }
1876 
kvmppc_clr_tsr_bits(struct kvm_vcpu * vcpu,u32 tsr_bits)1877 void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
1878 {
1879 	clear_bits(tsr_bits, &vcpu->arch.tsr);
1880 
1881 	/*
1882 	 * We may have stopped the watchdog due to
1883 	 * being stuck on final expiration.
1884 	 */
1885 	if (tsr_bits & (TSR_ENW | TSR_WIS))
1886 		arm_next_watchdog(vcpu);
1887 
1888 	update_timer_ints(vcpu);
1889 }
1890 
kvmppc_decrementer_func(struct kvm_vcpu * vcpu)1891 void kvmppc_decrementer_func(struct kvm_vcpu *vcpu)
1892 {
1893 	if (vcpu->arch.tcr & TCR_ARE) {
1894 		vcpu->arch.dec = vcpu->arch.decar;
1895 		kvmppc_emulate_dec(vcpu);
1896 	}
1897 
1898 	kvmppc_set_tsr_bits(vcpu, TSR_DIS);
1899 }
1900 
kvmppc_booke_add_breakpoint(struct debug_reg * dbg_reg,uint64_t addr,int index)1901 static int kvmppc_booke_add_breakpoint(struct debug_reg *dbg_reg,
1902 				       uint64_t addr, int index)
1903 {
1904 	switch (index) {
1905 	case 0:
1906 		dbg_reg->dbcr0 |= DBCR0_IAC1;
1907 		dbg_reg->iac1 = addr;
1908 		break;
1909 	case 1:
1910 		dbg_reg->dbcr0 |= DBCR0_IAC2;
1911 		dbg_reg->iac2 = addr;
1912 		break;
1913 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
1914 	case 2:
1915 		dbg_reg->dbcr0 |= DBCR0_IAC3;
1916 		dbg_reg->iac3 = addr;
1917 		break;
1918 	case 3:
1919 		dbg_reg->dbcr0 |= DBCR0_IAC4;
1920 		dbg_reg->iac4 = addr;
1921 		break;
1922 #endif
1923 	default:
1924 		return -EINVAL;
1925 	}
1926 
1927 	dbg_reg->dbcr0 |= DBCR0_IDM;
1928 	return 0;
1929 }
1930 
kvmppc_booke_add_watchpoint(struct debug_reg * dbg_reg,uint64_t addr,int type,int index)1931 static int kvmppc_booke_add_watchpoint(struct debug_reg *dbg_reg, uint64_t addr,
1932 				       int type, int index)
1933 {
1934 	switch (index) {
1935 	case 0:
1936 		if (type & KVMPPC_DEBUG_WATCH_READ)
1937 			dbg_reg->dbcr0 |= DBCR0_DAC1R;
1938 		if (type & KVMPPC_DEBUG_WATCH_WRITE)
1939 			dbg_reg->dbcr0 |= DBCR0_DAC1W;
1940 		dbg_reg->dac1 = addr;
1941 		break;
1942 	case 1:
1943 		if (type & KVMPPC_DEBUG_WATCH_READ)
1944 			dbg_reg->dbcr0 |= DBCR0_DAC2R;
1945 		if (type & KVMPPC_DEBUG_WATCH_WRITE)
1946 			dbg_reg->dbcr0 |= DBCR0_DAC2W;
1947 		dbg_reg->dac2 = addr;
1948 		break;
1949 	default:
1950 		return -EINVAL;
1951 	}
1952 
1953 	dbg_reg->dbcr0 |= DBCR0_IDM;
1954 	return 0;
1955 }
kvm_guest_protect_msr(struct kvm_vcpu * vcpu,ulong prot_bitmap,bool set)1956 static void kvm_guest_protect_msr(struct kvm_vcpu *vcpu, ulong prot_bitmap,
1957 				  bool set)
1958 {
1959 	/* XXX: Add similar MSR protection for BookE-PR */
1960 #ifdef CONFIG_KVM_BOOKE_HV
1961 	BUG_ON(prot_bitmap & ~(MSRP_UCLEP | MSRP_DEP | MSRP_PMMP));
1962 	if (set) {
1963 		if (prot_bitmap & MSR_UCLE)
1964 			vcpu->arch.shadow_msrp |= MSRP_UCLEP;
1965 		if (prot_bitmap & MSR_DE)
1966 			vcpu->arch.shadow_msrp |= MSRP_DEP;
1967 		if (prot_bitmap & MSR_PMM)
1968 			vcpu->arch.shadow_msrp |= MSRP_PMMP;
1969 	} else {
1970 		if (prot_bitmap & MSR_UCLE)
1971 			vcpu->arch.shadow_msrp &= ~MSRP_UCLEP;
1972 		if (prot_bitmap & MSR_DE)
1973 			vcpu->arch.shadow_msrp &= ~MSRP_DEP;
1974 		if (prot_bitmap & MSR_PMM)
1975 			vcpu->arch.shadow_msrp &= ~MSRP_PMMP;
1976 	}
1977 #endif
1978 }
1979 
kvmppc_xlate(struct kvm_vcpu * vcpu,ulong eaddr,enum xlate_instdata xlid,enum xlate_readwrite xlrw,struct kvmppc_pte * pte)1980 int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid,
1981 		 enum xlate_readwrite xlrw, struct kvmppc_pte *pte)
1982 {
1983 	int gtlb_index;
1984 	gpa_t gpaddr;
1985 
1986 #ifdef CONFIG_KVM_E500V2
1987 	if (!(vcpu->arch.shared->msr & MSR_PR) &&
1988 	    (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) {
1989 		pte->eaddr = eaddr;
1990 		pte->raddr = (vcpu->arch.magic_page_pa & PAGE_MASK) |
1991 			     (eaddr & ~PAGE_MASK);
1992 		pte->vpage = eaddr >> PAGE_SHIFT;
1993 		pte->may_read = true;
1994 		pte->may_write = true;
1995 		pte->may_execute = true;
1996 
1997 		return 0;
1998 	}
1999 #endif
2000 
2001 	/* Check the guest TLB. */
2002 	switch (xlid) {
2003 	case XLATE_INST:
2004 		gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
2005 		break;
2006 	case XLATE_DATA:
2007 		gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
2008 		break;
2009 	default:
2010 		BUG();
2011 	}
2012 
2013 	/* Do we have a TLB entry at all? */
2014 	if (gtlb_index < 0)
2015 		return -ENOENT;
2016 
2017 	gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
2018 
2019 	pte->eaddr = eaddr;
2020 	pte->raddr = (gpaddr & PAGE_MASK) | (eaddr & ~PAGE_MASK);
2021 	pte->vpage = eaddr >> PAGE_SHIFT;
2022 
2023 	/* XXX read permissions from the guest TLB */
2024 	pte->may_read = true;
2025 	pte->may_write = true;
2026 	pte->may_execute = true;
2027 
2028 	return 0;
2029 }
2030 
kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu * vcpu,struct kvm_guest_debug * dbg)2031 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
2032 					 struct kvm_guest_debug *dbg)
2033 {
2034 	struct debug_reg *dbg_reg;
2035 	int n, b = 0, w = 0;
2036 	int ret = 0;
2037 
2038 	vcpu_load(vcpu);
2039 
2040 	if (!(dbg->control & KVM_GUESTDBG_ENABLE)) {
2041 		vcpu->arch.dbg_reg.dbcr0 = 0;
2042 		vcpu->guest_debug = 0;
2043 		kvm_guest_protect_msr(vcpu, MSR_DE, false);
2044 		goto out;
2045 	}
2046 
2047 	kvm_guest_protect_msr(vcpu, MSR_DE, true);
2048 	vcpu->guest_debug = dbg->control;
2049 	vcpu->arch.dbg_reg.dbcr0 = 0;
2050 
2051 	if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
2052 		vcpu->arch.dbg_reg.dbcr0 |= DBCR0_IDM | DBCR0_IC;
2053 
2054 	/* Code below handles only HW breakpoints */
2055 	dbg_reg = &(vcpu->arch.dbg_reg);
2056 
2057 #ifdef CONFIG_KVM_BOOKE_HV
2058 	/*
2059 	 * On BookE-HV (e500mc) the guest is always executed with MSR.GS=1
2060 	 * DBCR1 and DBCR2 are set to trigger debug events when MSR.PR is 0
2061 	 */
2062 	dbg_reg->dbcr1 = 0;
2063 	dbg_reg->dbcr2 = 0;
2064 #else
2065 	/*
2066 	 * On BookE-PR (e500v2) the guest is always executed with MSR.PR=1
2067 	 * We set DBCR1 and DBCR2 to only trigger debug events when MSR.PR
2068 	 * is set.
2069 	 */
2070 	dbg_reg->dbcr1 = DBCR1_IAC1US | DBCR1_IAC2US | DBCR1_IAC3US |
2071 			  DBCR1_IAC4US;
2072 	dbg_reg->dbcr2 = DBCR2_DAC1US | DBCR2_DAC2US;
2073 #endif
2074 
2075 	if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP))
2076 		goto out;
2077 
2078 	ret = -EINVAL;
2079 	for (n = 0; n < (KVMPPC_BOOKE_IAC_NUM + KVMPPC_BOOKE_DAC_NUM); n++) {
2080 		uint64_t addr = dbg->arch.bp[n].addr;
2081 		uint32_t type = dbg->arch.bp[n].type;
2082 
2083 		if (type == KVMPPC_DEBUG_NONE)
2084 			continue;
2085 
2086 		if (type & ~(KVMPPC_DEBUG_WATCH_READ |
2087 			     KVMPPC_DEBUG_WATCH_WRITE |
2088 			     KVMPPC_DEBUG_BREAKPOINT))
2089 			goto out;
2090 
2091 		if (type & KVMPPC_DEBUG_BREAKPOINT) {
2092 			/* Setting H/W breakpoint */
2093 			if (kvmppc_booke_add_breakpoint(dbg_reg, addr, b++))
2094 				goto out;
2095 		} else {
2096 			/* Setting H/W watchpoint */
2097 			if (kvmppc_booke_add_watchpoint(dbg_reg, addr,
2098 							type, w++))
2099 				goto out;
2100 		}
2101 	}
2102 
2103 	ret = 0;
2104 out:
2105 	vcpu_put(vcpu);
2106 	return ret;
2107 }
2108 
kvmppc_booke_vcpu_load(struct kvm_vcpu * vcpu,int cpu)2109 void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
2110 {
2111 	vcpu->cpu = smp_processor_id();
2112 	current->thread.kvm_vcpu = vcpu;
2113 }
2114 
kvmppc_booke_vcpu_put(struct kvm_vcpu * vcpu)2115 void kvmppc_booke_vcpu_put(struct kvm_vcpu *vcpu)
2116 {
2117 	current->thread.kvm_vcpu = NULL;
2118 	vcpu->cpu = -1;
2119 
2120 	/* Clear pending debug event in DBSR */
2121 	kvmppc_clear_dbsr();
2122 }
2123 
kvmppc_core_init_vm(struct kvm * kvm)2124 int kvmppc_core_init_vm(struct kvm *kvm)
2125 {
2126 	return kvm->arch.kvm_ops->init_vm(kvm);
2127 }
2128 
kvmppc_core_vcpu_create(struct kvm_vcpu * vcpu)2129 int kvmppc_core_vcpu_create(struct kvm_vcpu *vcpu)
2130 {
2131 	int i;
2132 	int r;
2133 
2134 	r = vcpu->kvm->arch.kvm_ops->vcpu_create(vcpu);
2135 	if (r)
2136 		return r;
2137 
2138 	/* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
2139 	vcpu->arch.regs.nip = 0;
2140 	vcpu->arch.shared->pir = vcpu->vcpu_id;
2141 	kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
2142 	kvmppc_set_msr(vcpu, 0);
2143 
2144 #ifndef CONFIG_KVM_BOOKE_HV
2145 	vcpu->arch.shadow_msr = MSR_USER | MSR_IS | MSR_DS;
2146 	vcpu->arch.shadow_pid = 1;
2147 	vcpu->arch.shared->msr = 0;
2148 #endif
2149 
2150 	/* Eye-catching numbers so we know if the guest takes an interrupt
2151 	 * before it's programmed its own IVPR/IVORs. */
2152 	vcpu->arch.ivpr = 0x55550000;
2153 	for (i = 0; i < BOOKE_IRQPRIO_MAX; i++)
2154 		vcpu->arch.ivor[i] = 0x7700 | i * 4;
2155 
2156 	kvmppc_init_timing_stats(vcpu);
2157 
2158 	r = kvmppc_core_vcpu_setup(vcpu);
2159 	if (r)
2160 		vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
2161 	kvmppc_sanity_check(vcpu);
2162 	return r;
2163 }
2164 
kvmppc_core_vcpu_free(struct kvm_vcpu * vcpu)2165 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
2166 {
2167 	vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
2168 }
2169 
kvmppc_core_destroy_vm(struct kvm * kvm)2170 void kvmppc_core_destroy_vm(struct kvm *kvm)
2171 {
2172 	kvm->arch.kvm_ops->destroy_vm(kvm);
2173 }
2174 
kvmppc_core_vcpu_load(struct kvm_vcpu * vcpu,int cpu)2175 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
2176 {
2177 	vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
2178 }
2179 
kvmppc_core_vcpu_put(struct kvm_vcpu * vcpu)2180 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
2181 {
2182 	vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
2183 }
2184 
kvmppc_booke_init(void)2185 int __init kvmppc_booke_init(void)
2186 {
2187 #ifndef CONFIG_KVM_BOOKE_HV
2188 	unsigned long ivor[16];
2189 	unsigned long *handler = kvmppc_booke_handler_addr;
2190 	unsigned long max_ivor = 0;
2191 	unsigned long handler_len;
2192 	int i;
2193 
2194 	/* We install our own exception handlers by hijacking IVPR. IVPR must
2195 	 * be 16-bit aligned, so we need a 64KB allocation. */
2196 	kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
2197 	                                         VCPU_SIZE_ORDER);
2198 	if (!kvmppc_booke_handlers)
2199 		return -ENOMEM;
2200 
2201 	/* XXX make sure our handlers are smaller than Linux's */
2202 
2203 	/* Copy our interrupt handlers to match host IVORs. That way we don't
2204 	 * have to swap the IVORs on every guest/host transition. */
2205 	ivor[0] = mfspr(SPRN_IVOR0);
2206 	ivor[1] = mfspr(SPRN_IVOR1);
2207 	ivor[2] = mfspr(SPRN_IVOR2);
2208 	ivor[3] = mfspr(SPRN_IVOR3);
2209 	ivor[4] = mfspr(SPRN_IVOR4);
2210 	ivor[5] = mfspr(SPRN_IVOR5);
2211 	ivor[6] = mfspr(SPRN_IVOR6);
2212 	ivor[7] = mfspr(SPRN_IVOR7);
2213 	ivor[8] = mfspr(SPRN_IVOR8);
2214 	ivor[9] = mfspr(SPRN_IVOR9);
2215 	ivor[10] = mfspr(SPRN_IVOR10);
2216 	ivor[11] = mfspr(SPRN_IVOR11);
2217 	ivor[12] = mfspr(SPRN_IVOR12);
2218 	ivor[13] = mfspr(SPRN_IVOR13);
2219 	ivor[14] = mfspr(SPRN_IVOR14);
2220 	ivor[15] = mfspr(SPRN_IVOR15);
2221 
2222 	for (i = 0; i < 16; i++) {
2223 		if (ivor[i] > max_ivor)
2224 			max_ivor = i;
2225 
2226 		handler_len = handler[i + 1] - handler[i];
2227 		memcpy((void *)kvmppc_booke_handlers + ivor[i],
2228 		       (void *)handler[i], handler_len);
2229 	}
2230 
2231 	handler_len = handler[max_ivor + 1] - handler[max_ivor];
2232 	flush_icache_range(kvmppc_booke_handlers, kvmppc_booke_handlers +
2233 			   ivor[max_ivor] + handler_len);
2234 #endif /* !BOOKE_HV */
2235 	return 0;
2236 }
2237 
kvmppc_booke_exit(void)2238 void __exit kvmppc_booke_exit(void)
2239 {
2240 	free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
2241 	kvm_exit();
2242 }
2243