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KVM: PPC: e500: Stop keeping shadow TLB
[mirror_ubuntu-bionic-kernel.git] / arch / powerpc / kvm / booke.c
CommitLineData
bbf45ba5
HB		 1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License, version 2, as
4 * published by the Free Software Foundation.
5 *
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
9 * GNU General Public License for more details.
10 *
11 * You should have received a copy of the GNU General Public License
12 * along with this program; if not, write to the Free Software
13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
14 *
15 * Copyright IBM Corp. 2007
4cd35f67 16 * Copyright 2010-2011 Freescale Semiconductor, Inc.
bbf45ba5
HB		 17 *
18 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
19 * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
20 */
21
22#include <linux/errno.h>
23#include <linux/err.h>
24#include <linux/kvm_host.h>
5a0e3ad6 25#include <linux/gfp.h>
bbf45ba5
HB		 26#include <linux/module.h>
27#include <linux/vmalloc.h>
28#include <linux/fs.h>
7924bd41 29
bbf45ba5
HB		 30#include <asm/cputable.h>
31#include <asm/uaccess.h>
32#include <asm/kvm_ppc.h>
73e75b41 33#include "timing.h"
d9fbd03d 34#include <asm/cacheflush.h>
bbf45ba5 35
75f74f0d 36#include "booke.h"
bbf45ba5 37
d9fbd03d
HB		 38unsigned long kvmppc_booke_handlers;
39
bbf45ba5
HB		 40#define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
41#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
42
43struct kvm_stats_debugfs_item debugfs_entries[] = {
bbf45ba5
HB		 44 { "mmio", VCPU_STAT(mmio_exits) },
45 { "dcr", VCPU_STAT(dcr_exits) },
46 { "sig", VCPU_STAT(signal_exits) },
bbf45ba5
HB		 47 { "itlb_r", VCPU_STAT(itlb_real_miss_exits) },
48 { "itlb_v", VCPU_STAT(itlb_virt_miss_exits) },
49 { "dtlb_r", VCPU_STAT(dtlb_real_miss_exits) },
50 { "dtlb_v", VCPU_STAT(dtlb_virt_miss_exits) },
51 { "sysc", VCPU_STAT(syscall_exits) },
52 { "isi", VCPU_STAT(isi_exits) },
53 { "dsi", VCPU_STAT(dsi_exits) },
54 { "inst_emu", VCPU_STAT(emulated_inst_exits) },
55 { "dec", VCPU_STAT(dec_exits) },
56 { "ext_intr", VCPU_STAT(ext_intr_exits) },
45c5eb67 57 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
bbf45ba5
HB		 58 { NULL }
59};
60
bbf45ba5
HB		 61/* TODO: use vcpu_printf() */
62void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
63{
64 int i;
65
666e7252 66 printk("pc: %08lx msr: %08llx\n", vcpu->arch.pc, vcpu->arch.shared->msr);
5cf8ca22 67 printk("lr: %08lx ctr: %08lx\n", vcpu->arch.lr, vcpu->arch.ctr);
de7906c3
AG		 68 printk("srr0: %08llx srr1: %08llx\n", vcpu->arch.shared->srr0,
69 vcpu->arch.shared->srr1);
bbf45ba5
HB		 70
71 printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
72
73 for (i = 0; i < 32; i += 4) {
5cf8ca22 74 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
8e5b26b5
AG		 75 kvmppc_get_gpr(vcpu, i),
76 kvmppc_get_gpr(vcpu, i+1),
77 kvmppc_get_gpr(vcpu, i+2),
78 kvmppc_get_gpr(vcpu, i+3));
bbf45ba5
HB		 79 }
80}
81
4cd35f67
SW		 82#ifdef CONFIG_SPE
83void kvmppc_vcpu_disable_spe(struct kvm_vcpu *vcpu)
84{
85 preempt_disable();
86 enable_kernel_spe();
87 kvmppc_save_guest_spe(vcpu);
88 vcpu->arch.shadow_msr &= ~MSR_SPE;
89 preempt_enable();
90}
91
92static void kvmppc_vcpu_enable_spe(struct kvm_vcpu *vcpu)
93{
94 preempt_disable();
95 enable_kernel_spe();
96 kvmppc_load_guest_spe(vcpu);
97 vcpu->arch.shadow_msr |= MSR_SPE;
98 preempt_enable();
99}
100
101static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
102{
103 if (vcpu->arch.shared->msr & MSR_SPE) {
104 if (!(vcpu->arch.shadow_msr & MSR_SPE))
105 kvmppc_vcpu_enable_spe(vcpu);
106 } else if (vcpu->arch.shadow_msr & MSR_SPE) {
107 kvmppc_vcpu_disable_spe(vcpu);
108 }
109}
110#else
111static void kvmppc_vcpu_sync_spe(struct kvm_vcpu *vcpu)
112{
113}
114#endif
115
116/* Helper function for "full" MSR writes. No need to call this if only EE is
117 * changing. */
118void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr)
119{
120 if ((new_msr & MSR_PR) != (vcpu->arch.shared->msr & MSR_PR))
121 kvmppc_mmu_priv_switch(vcpu, new_msr & MSR_PR);
122
123 vcpu->arch.shared->msr = new_msr;
124
125 if (vcpu->arch.shared->msr & MSR_WE) {
126 kvm_vcpu_block(vcpu);
127 kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS);
128 };
129
130 kvmppc_vcpu_sync_spe(vcpu);
131}
132
d4cf3892
HB		 133static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
134 unsigned int priority)
9dd921cf 135{
9dd921cf
HB		 136 set_bit(priority, &vcpu->arch.pending_exceptions);
137}
138
daf5e271
LY		 139static void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu,
140 ulong dear_flags, ulong esr_flags)
9dd921cf 141{
daf5e271
LY		 142 vcpu->arch.queued_dear = dear_flags;
143 vcpu->arch.queued_esr = esr_flags;
144 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
145}
146
147static void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu,
148 ulong dear_flags, ulong esr_flags)
149{
150 vcpu->arch.queued_dear = dear_flags;
151 vcpu->arch.queued_esr = esr_flags;
152 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
153}
154
155static void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu,
156 ulong esr_flags)
157{
158 vcpu->arch.queued_esr = esr_flags;
159 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
160}
161
162void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags)
163{
164 vcpu->arch.queued_esr = esr_flags;
d4cf3892 165 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
9dd921cf
HB		 166}
167
168void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
169{
d4cf3892 170 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
9dd921cf
HB		 171}
172
173int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
174{
d4cf3892 175 return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
9dd921cf
HB		 176}
177
7706664d
AG		 178void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
179{
180 clear_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
181}
182
9dd921cf
HB		 183void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
184 struct kvm_interrupt *irq)
185{
c5335f17
AG		 186 unsigned int prio = BOOKE_IRQPRIO_EXTERNAL;
187
188 if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
189 prio = BOOKE_IRQPRIO_EXTERNAL_LEVEL;
190
191 kvmppc_booke_queue_irqprio(vcpu, prio);
9dd921cf
HB		 192}
193
4496f974
AG		 194void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu,
195 struct kvm_interrupt *irq)
196{
197 clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions);
c5335f17 198 clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions);
4496f974
AG		 199}
200
d4cf3892
HB		 201/* Deliver the interrupt of the corresponding priority, if possible. */
202static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
203 unsigned int priority)
bbf45ba5 204{
d4cf3892 205 int allowed = 0;
6045be5d 206 ulong uninitialized_var(msr_mask);
daf5e271 207 bool update_esr = false, update_dear = false;
5c6cedf4
AG		 208 ulong crit_raw = vcpu->arch.shared->critical;
209 ulong crit_r1 = kvmppc_get_gpr(vcpu, 1);
210 bool crit;
c5335f17 211 bool keep_irq = false;
5c6cedf4
AG		 212
213 /* Truncate crit indicators in 32 bit mode */
214 if (!(vcpu->arch.shared->msr & MSR_SF)) {
215 crit_raw &= 0xffffffff;
216 crit_r1 &= 0xffffffff;
217 }
218
219 /* Critical section when crit == r1 */
220 crit = (crit_raw == crit_r1);
221 /* ... and we're in supervisor mode */
222 crit = crit && !(vcpu->arch.shared->msr & MSR_PR);
d4cf3892 223
c5335f17
AG		 224 if (priority == BOOKE_IRQPRIO_EXTERNAL_LEVEL) {
225 priority = BOOKE_IRQPRIO_EXTERNAL;
226 keep_irq = true;
227 }
228
d4cf3892 229 switch (priority) {
d4cf3892 230 case BOOKE_IRQPRIO_DTLB_MISS:
d4cf3892 231 case BOOKE_IRQPRIO_DATA_STORAGE:
daf5e271
LY		 232 update_dear = true;
233 /* fall through */
d4cf3892 234 case BOOKE_IRQPRIO_INST_STORAGE:
daf5e271
LY		 235 case BOOKE_IRQPRIO_PROGRAM:
236 update_esr = true;
237 /* fall through */
238 case BOOKE_IRQPRIO_ITLB_MISS:
239 case BOOKE_IRQPRIO_SYSCALL:
d4cf3892 240 case BOOKE_IRQPRIO_FP_UNAVAIL:
bb3a8a17
HB		 241 case BOOKE_IRQPRIO_SPE_UNAVAIL:
242 case BOOKE_IRQPRIO_SPE_FP_DATA:
243 case BOOKE_IRQPRIO_SPE_FP_ROUND:
d4cf3892
HB		 244 case BOOKE_IRQPRIO_AP_UNAVAIL:
245 case BOOKE_IRQPRIO_ALIGNMENT:
246 allowed = 1;
247 msr_mask = MSR_CE|MSR_ME|MSR_DE;
bbf45ba5 248 break;
d4cf3892
HB		 249 case BOOKE_IRQPRIO_CRITICAL:
250 case BOOKE_IRQPRIO_WATCHDOG:
666e7252 251 allowed = vcpu->arch.shared->msr & MSR_CE;
d4cf3892 252 msr_mask = MSR_ME;
bbf45ba5 253 break;
d4cf3892 254 case BOOKE_IRQPRIO_MACHINE_CHECK:
666e7252 255 allowed = vcpu->arch.shared->msr & MSR_ME;
d4cf3892 256 msr_mask = 0;
bbf45ba5 257 break;
d4cf3892
HB		 258 case BOOKE_IRQPRIO_EXTERNAL:
259 case BOOKE_IRQPRIO_DECREMENTER:
260 case BOOKE_IRQPRIO_FIT:
666e7252 261 allowed = vcpu->arch.shared->msr & MSR_EE;
5c6cedf4 262 allowed = allowed && !crit;
d4cf3892 263 msr_mask = MSR_CE|MSR_ME|MSR_DE;
bbf45ba5 264 break;
d4cf3892 265 case BOOKE_IRQPRIO_DEBUG:
666e7252 266 allowed = vcpu->arch.shared->msr & MSR_DE;
d4cf3892 267 msr_mask = MSR_ME;
bbf45ba5 268 break;
bbf45ba5
HB		 269 }
270
d4cf3892 271 if (allowed) {
de7906c3
AG		 272 vcpu->arch.shared->srr0 = vcpu->arch.pc;
273 vcpu->arch.shared->srr1 = vcpu->arch.shared->msr;
d4cf3892 274 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
daf5e271
LY		 275 if (update_esr == true)
276 vcpu->arch.esr = vcpu->arch.queued_esr;
277 if (update_dear == true)
5e030186 278 vcpu->arch.shared->dar = vcpu->arch.queued_dear;
666e7252 279 kvmppc_set_msr(vcpu, vcpu->arch.shared->msr & msr_mask);
bbf45ba5 280
c5335f17
AG		 281 if (!keep_irq)
282 clear_bit(priority, &vcpu->arch.pending_exceptions);
bbf45ba5
HB		 283 }
284
d4cf3892 285 return allowed;
bbf45ba5
HB		 286}
287
288/* Check pending exceptions and deliver one, if possible. */
9dd921cf 289void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
bbf45ba5
HB		 290{
291 unsigned long *pending = &vcpu->arch.pending_exceptions;
90bba358 292 unsigned long old_pending = vcpu->arch.pending_exceptions;
bbf45ba5
HB		 293 unsigned int priority;
294
9ab80843 295 priority = __ffs(*pending);
bdc89f13 296 while (priority <= BOOKE_IRQPRIO_MAX) {
d4cf3892 297 if (kvmppc_booke_irqprio_deliver(vcpu, priority))
bbf45ba5 298 break;
bbf45ba5
HB		 299
300 priority = find_next_bit(pending,
301 BITS_PER_BYTE * sizeof(*pending),
302 priority + 1);
303 }
90bba358
AG		 304
305 /* Tell the guest about our interrupt status */
306 if (*pending)
307 vcpu->arch.shared->int_pending = 1;
308 else if (old_pending)
309 vcpu->arch.shared->int_pending = 0;
bbf45ba5
HB		 310}
311
bbf45ba5
HB		 312/**
313 * kvmppc_handle_exit
314 *
315 * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
316 */
317int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
318 unsigned int exit_nr)
319{
320 enum emulation_result er;
321 int r = RESUME_HOST;
322
73e75b41
HB		 323 /* update before a new last_exit_type is rewritten */
324 kvmppc_update_timing_stats(vcpu);
325
bbf45ba5
HB		 326 local_irq_enable();
327
328 run->exit_reason = KVM_EXIT_UNKNOWN;
329 run->ready_for_interrupt_injection = 1;
330
331 switch (exit_nr) {
332 case BOOKE_INTERRUPT_MACHINE_CHECK:
333 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
334 kvmppc_dump_vcpu(vcpu);
335 r = RESUME_HOST;
336 break;
337
338 case BOOKE_INTERRUPT_EXTERNAL:
7b701591 339 kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
1b6766c7
HB		 340 if (need_resched())
341 cond_resched();
342 r = RESUME_GUEST;
343 break;
344
bbf45ba5
HB		 345 case BOOKE_INTERRUPT_DECREMENTER:
346 /* Since we switched IVPR back to the host's value, the host
347 * handled this interrupt the moment we enabled interrupts.
348 * Now we just offer it a chance to reschedule the guest. */
7b701591 349 kvmppc_account_exit(vcpu, DEC_EXITS);
bbf45ba5
HB		 350 if (need_resched())
351 cond_resched();
bbf45ba5
HB		 352 r = RESUME_GUEST;
353 break;
354
355 case BOOKE_INTERRUPT_PROGRAM:
666e7252 356 if (vcpu->arch.shared->msr & MSR_PR) {
bbf45ba5
HB		 357 /* Program traps generated by user-level software must be handled
358 * by the guest kernel. */
daf5e271 359 kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);
bbf45ba5 360 r = RESUME_GUEST;
7b701591 361 kvmppc_account_exit(vcpu, USR_PR_INST);
bbf45ba5
HB		 362 break;
363 }
364
365 er = kvmppc_emulate_instruction(run, vcpu);
366 switch (er) {
367 case EMULATE_DONE:
73e75b41 368 /* don't overwrite subtypes, just account kvm_stats */
7b701591 369 kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
bbf45ba5
HB		 370 /* Future optimization: only reload non-volatiles if
371 * they were actually modified by emulation. */
bbf45ba5
HB		 372 r = RESUME_GUEST_NV;
373 break;
374 case EMULATE_DO_DCR:
375 run->exit_reason = KVM_EXIT_DCR;
376 r = RESUME_HOST;
377 break;
378 case EMULATE_FAIL:
379 /* XXX Deliver Program interrupt to guest. */
5cf8ca22 380 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
bbf45ba5
HB		 381 __func__, vcpu->arch.pc, vcpu->arch.last_inst);
382 /* For debugging, encode the failing instruction and
383 * report it to userspace. */
384 run->hw.hardware_exit_reason = ~0ULL << 32;
385 run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
386 r = RESUME_HOST;
387 break;
388 default:
389 BUG();
390 }
391 break;
392
de368dce 393 case BOOKE_INTERRUPT_FP_UNAVAIL:
d4cf3892 394 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
7b701591 395 kvmppc_account_exit(vcpu, FP_UNAVAIL);
de368dce
CE		 396 r = RESUME_GUEST;
397 break;
398
4cd35f67
SW		 399#ifdef CONFIG_SPE
400 case BOOKE_INTERRUPT_SPE_UNAVAIL: {
401 if (vcpu->arch.shared->msr & MSR_SPE)
402 kvmppc_vcpu_enable_spe(vcpu);
403 else
404 kvmppc_booke_queue_irqprio(vcpu,
405 BOOKE_IRQPRIO_SPE_UNAVAIL);
bb3a8a17
HB		 406 r = RESUME_GUEST;
407 break;
4cd35f67 408 }
bb3a8a17
HB		 409
410 case BOOKE_INTERRUPT_SPE_FP_DATA:
411 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
412 r = RESUME_GUEST;
413 break;
414
415 case BOOKE_INTERRUPT_SPE_FP_ROUND:
416 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
417 r = RESUME_GUEST;
418 break;
4cd35f67
SW		 419#else
420 case BOOKE_INTERRUPT_SPE_UNAVAIL:
421 /*
422 * Guest wants SPE, but host kernel doesn't support it. Send
423 * an "unimplemented operation" program check to the guest.
424 */
425 kvmppc_core_queue_program(vcpu, ESR_PUO | ESR_SPV);
426 r = RESUME_GUEST;
427 break;
428
429 /*
430 * These really should never happen without CONFIG_SPE,
431 * as we should never enable the real MSR[SPE] in the guest.
432 */
433 case BOOKE_INTERRUPT_SPE_FP_DATA:
434 case BOOKE_INTERRUPT_SPE_FP_ROUND:
435 printk(KERN_CRIT "%s: unexpected SPE interrupt %u at %08lx\n",
436 __func__, exit_nr, vcpu->arch.pc);
437 run->hw.hardware_exit_reason = exit_nr;
438 r = RESUME_HOST;
439 break;
440#endif
bb3a8a17 441
bbf45ba5 442 case BOOKE_INTERRUPT_DATA_STORAGE:
daf5e271
LY		 443 kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear,
444 vcpu->arch.fault_esr);
7b701591 445 kvmppc_account_exit(vcpu, DSI_EXITS);
bbf45ba5
HB		 446 r = RESUME_GUEST;
447 break;
448
449 case BOOKE_INTERRUPT_INST_STORAGE:
daf5e271 450 kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr);
7b701591 451 kvmppc_account_exit(vcpu, ISI_EXITS);
bbf45ba5
HB		 452 r = RESUME_GUEST;
453 break;
454
455 case BOOKE_INTERRUPT_SYSCALL:
2a342ed5
AG		 456 if (!(vcpu->arch.shared->msr & MSR_PR) &&
457 (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
458 /* KVM PV hypercalls */
459 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
460 r = RESUME_GUEST;
461 } else {
462 /* Guest syscalls */
463 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
464 }
7b701591 465 kvmppc_account_exit(vcpu, SYSCALL_EXITS);
bbf45ba5
HB		 466 r = RESUME_GUEST;
467 break;
468
469 case BOOKE_INTERRUPT_DTLB_MISS: {
bbf45ba5 470 unsigned long eaddr = vcpu->arch.fault_dear;
7924bd41 471 int gtlb_index;
475e7cdd 472 gpa_t gpaddr;
bbf45ba5
HB		 473 gfn_t gfn;
474
a4cd8b23
SW		 475#ifdef CONFIG_KVM_E500
476 if (!(vcpu->arch.shared->msr & MSR_PR) &&
477 (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) {
478 kvmppc_map_magic(vcpu);
479 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
480 r = RESUME_GUEST;
481
482 break;
483 }
484#endif
485
bbf45ba5 486 /* Check the guest TLB. */
fa86b8dd 487 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
7924bd41 488 if (gtlb_index < 0) {
bbf45ba5 489 /* The guest didn't have a mapping for it. */
daf5e271
LY		 490 kvmppc_core_queue_dtlb_miss(vcpu,
491 vcpu->arch.fault_dear,
492 vcpu->arch.fault_esr);
b52a638c 493 kvmppc_mmu_dtlb_miss(vcpu);
7b701591 494 kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
bbf45ba5
HB		 495 r = RESUME_GUEST;
496 break;
497 }
498
be8d1cae 499 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
475e7cdd 500 gfn = gpaddr >> PAGE_SHIFT;
bbf45ba5
HB		 501
502 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
503 /* The guest TLB had a mapping, but the shadow TLB
504 * didn't, and it is RAM. This could be because:
505 * a) the entry is mapping the host kernel, or
506 * b) the guest used a large mapping which we're faking
507 * Either way, we need to satisfy the fault without
508 * invoking the guest. */
58a96214 509 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
7b701591 510 kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
bbf45ba5
HB		 511 r = RESUME_GUEST;
512 } else {
513 /* Guest has mapped and accessed a page which is not
514 * actually RAM. */
475e7cdd 515 vcpu->arch.paddr_accessed = gpaddr;
bbf45ba5 516 r = kvmppc_emulate_mmio(run, vcpu);
7b701591 517 kvmppc_account_exit(vcpu, MMIO_EXITS);
bbf45ba5
HB		 518 }
519
520 break;
521 }
522
523 case BOOKE_INTERRUPT_ITLB_MISS: {
bbf45ba5 524 unsigned long eaddr = vcpu->arch.pc;
89168618 525 gpa_t gpaddr;
bbf45ba5 526 gfn_t gfn;
7924bd41 527 int gtlb_index;
bbf45ba5
HB		 528
529 r = RESUME_GUEST;
530
531 /* Check the guest TLB. */
fa86b8dd 532 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
7924bd41 533 if (gtlb_index < 0) {
bbf45ba5 534 /* The guest didn't have a mapping for it. */
d4cf3892 535 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
b52a638c 536 kvmppc_mmu_itlb_miss(vcpu);
7b701591 537 kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
bbf45ba5
HB		 538 break;
539 }
540
7b701591 541 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
bbf45ba5 542
be8d1cae 543 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
89168618 544 gfn = gpaddr >> PAGE_SHIFT;
bbf45ba5
HB		 545
546 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
547 /* The guest TLB had a mapping, but the shadow TLB
548 * didn't. This could be because:
549 * a) the entry is mapping the host kernel, or
550 * b) the guest used a large mapping which we're faking
551 * Either way, we need to satisfy the fault without
552 * invoking the guest. */
58a96214 553 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
bbf45ba5
HB		 554 } else {
555 /* Guest mapped and leaped at non-RAM! */
d4cf3892 556 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
bbf45ba5
HB		 557 }
558
559 break;
560 }
561
6a0ab738
HB		 562 case BOOKE_INTERRUPT_DEBUG: {
563 u32 dbsr;
564
565 vcpu->arch.pc = mfspr(SPRN_CSRR0);
566
567 /* clear IAC events in DBSR register */
568 dbsr = mfspr(SPRN_DBSR);
569 dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4;
570 mtspr(SPRN_DBSR, dbsr);
571
572 run->exit_reason = KVM_EXIT_DEBUG;
7b701591 573 kvmppc_account_exit(vcpu, DEBUG_EXITS);
6a0ab738
HB		 574 r = RESUME_HOST;
575 break;
576 }
577
bbf45ba5
HB		 578 default:
579 printk(KERN_EMERG "exit_nr %d\n", exit_nr);
580 BUG();
581 }
582
583 local_irq_disable();
584
9dd921cf 585 kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5 586
bbf45ba5
HB		 587 if (!(r & RESUME_HOST)) {
588 /* To avoid clobbering exit_reason, only check for signals if
589 * we aren't already exiting to userspace for some other
590 * reason. */
591 if (signal_pending(current)) {
592 run->exit_reason = KVM_EXIT_INTR;
593 r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
7b701591 594 kvmppc_account_exit(vcpu, SIGNAL_EXITS);
bbf45ba5
HB		 595 }
596 }
597
598 return r;
599}
600
601/* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
602int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
603{
082decf2
HB		 604 int i;
605
bbf45ba5 606 vcpu->arch.pc = 0;
666e7252 607 vcpu->arch.shared->msr = 0;
ecee273f 608 vcpu->arch.shadow_msr = MSR_USER | MSR_DE | MSR_IS | MSR_DS;
8e5b26b5 609 kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
bbf45ba5 610
49dd2c49
HB		 611 vcpu->arch.shadow_pid = 1;
612
082decf2
HB		 613 /* Eye-catching numbers so we know if the guest takes an interrupt
614 * before it's programmed its own IVPR/IVORs. */
bbf45ba5 615 vcpu->arch.ivpr = 0x55550000;
082decf2
HB		 616 for (i = 0; i < BOOKE_IRQPRIO_MAX; i++)
617 vcpu->arch.ivor[i] = 0x7700 | i * 4;
bbf45ba5 618
73e75b41
HB		 619 kvmppc_init_timing_stats(vcpu);
620
5cbb5106 621 return kvmppc_core_vcpu_setup(vcpu);
bbf45ba5
HB		 622}
623
624int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
625{
626 int i;
627
628 regs->pc = vcpu->arch.pc;
992b5b29 629 regs->cr = kvmppc_get_cr(vcpu);
bbf45ba5
HB		 630 regs->ctr = vcpu->arch.ctr;
631 regs->lr = vcpu->arch.lr;
992b5b29 632 regs->xer = kvmppc_get_xer(vcpu);
666e7252 633 regs->msr = vcpu->arch.shared->msr;
de7906c3
AG		 634 regs->srr0 = vcpu->arch.shared->srr0;
635 regs->srr1 = vcpu->arch.shared->srr1;
bbf45ba5 636 regs->pid = vcpu->arch.pid;
a73a9599
AG		 637 regs->sprg0 = vcpu->arch.shared->sprg0;
638 regs->sprg1 = vcpu->arch.shared->sprg1;
639 regs->sprg2 = vcpu->arch.shared->sprg2;
640 regs->sprg3 = vcpu->arch.shared->sprg3;
bc9c1933
PT		 641 regs->sprg4 = vcpu->arch.sprg4;
642 regs->sprg5 = vcpu->arch.sprg5;
643 regs->sprg6 = vcpu->arch.sprg6;
644 regs->sprg7 = vcpu->arch.sprg7;
bbf45ba5
HB		 645
646 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
8e5b26b5 647 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
bbf45ba5
HB		 648
649 return 0;
650}
651
652int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
653{
654 int i;
655
656 vcpu->arch.pc = regs->pc;
992b5b29 657 kvmppc_set_cr(vcpu, regs->cr);
bbf45ba5
HB		 658 vcpu->arch.ctr = regs->ctr;
659 vcpu->arch.lr = regs->lr;
992b5b29 660 kvmppc_set_xer(vcpu, regs->xer);
b8fd68ac 661 kvmppc_set_msr(vcpu, regs->msr);
de7906c3
AG		 662 vcpu->arch.shared->srr0 = regs->srr0;
663 vcpu->arch.shared->srr1 = regs->srr1;
5ce941ee 664 kvmppc_set_pid(vcpu, regs->pid);
a73a9599
AG		 665 vcpu->arch.shared->sprg0 = regs->sprg0;
666 vcpu->arch.shared->sprg1 = regs->sprg1;
667 vcpu->arch.shared->sprg2 = regs->sprg2;
668 vcpu->arch.shared->sprg3 = regs->sprg3;
bc9c1933
PT		 669 vcpu->arch.sprg4 = regs->sprg4;
670 vcpu->arch.sprg5 = regs->sprg5;
671 vcpu->arch.sprg6 = regs->sprg6;
672 vcpu->arch.sprg7 = regs->sprg7;
bbf45ba5 673
8e5b26b5
AG		 674 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
675 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
bbf45ba5
HB		 676
677 return 0;
678}
679
5ce941ee
SW		 680static void get_sregs_base(struct kvm_vcpu *vcpu,
681 struct kvm_sregs *sregs)
682{
683 u64 tb = get_tb();
684
685 sregs->u.e.features |= KVM_SREGS_E_BASE;
686
687 sregs->u.e.csrr0 = vcpu->arch.csrr0;
688 sregs->u.e.csrr1 = vcpu->arch.csrr1;
689 sregs->u.e.mcsr = vcpu->arch.mcsr;
690 sregs->u.e.esr = vcpu->arch.esr;
691 sregs->u.e.dear = vcpu->arch.shared->dar;
692 sregs->u.e.tsr = vcpu->arch.tsr;
693 sregs->u.e.tcr = vcpu->arch.tcr;
694 sregs->u.e.dec = kvmppc_get_dec(vcpu, tb);
695 sregs->u.e.tb = tb;
696 sregs->u.e.vrsave = vcpu->arch.vrsave;
697}
698
699static int set_sregs_base(struct kvm_vcpu *vcpu,
700 struct kvm_sregs *sregs)
701{
702 if (!(sregs->u.e.features & KVM_SREGS_E_BASE))
703 return 0;
704
705 vcpu->arch.csrr0 = sregs->u.e.csrr0;
706 vcpu->arch.csrr1 = sregs->u.e.csrr1;
707 vcpu->arch.mcsr = sregs->u.e.mcsr;
708 vcpu->arch.esr = sregs->u.e.esr;
709 vcpu->arch.shared->dar = sregs->u.e.dear;
710 vcpu->arch.vrsave = sregs->u.e.vrsave;
711 vcpu->arch.tcr = sregs->u.e.tcr;
712
713 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC)
714 vcpu->arch.dec = sregs->u.e.dec;
715
716 kvmppc_emulate_dec(vcpu);
717
718 if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR) {
719 /*
720 * FIXME: existing KVM timer handling is incomplete.
721 * TSR cannot be read by the guest, and its value in
722 * vcpu->arch is always zero. For now, just handle
723 * the case where the caller is trying to inject a
724 * decrementer interrupt.
725 */
726
727 if ((sregs->u.e.tsr & TSR_DIS) &&
728 (vcpu->arch.tcr & TCR_DIE))
729 kvmppc_core_queue_dec(vcpu);
730 }
731
732 return 0;
733}
734
735static void get_sregs_arch206(struct kvm_vcpu *vcpu,
736 struct kvm_sregs *sregs)
737{
738 sregs->u.e.features |= KVM_SREGS_E_ARCH206;
739
740 sregs->u.e.pir = 0;
741 sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0;
742 sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1;
743 sregs->u.e.decar = vcpu->arch.decar;
744 sregs->u.e.ivpr = vcpu->arch.ivpr;
745}
746
747static int set_sregs_arch206(struct kvm_vcpu *vcpu,
748 struct kvm_sregs *sregs)
749{
750 if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206))
751 return 0;
752
753 if (sregs->u.e.pir != 0)
754 return -EINVAL;
755
756 vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0;
757 vcpu->arch.mcsrr1 = sregs->u.e.mcsrr1;
758 vcpu->arch.decar = sregs->u.e.decar;
759 vcpu->arch.ivpr = sregs->u.e.ivpr;
760
761 return 0;
762}
763
764void kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
765{
766 sregs->u.e.features |= KVM_SREGS_E_IVOR;
767
768 sregs->u.e.ivor_low[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL];
769 sregs->u.e.ivor_low[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK];
770 sregs->u.e.ivor_low[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE];
771 sregs->u.e.ivor_low[3] = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE];
772 sregs->u.e.ivor_low[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL];
773 sregs->u.e.ivor_low[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT];
774 sregs->u.e.ivor_low[6] = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM];
775 sregs->u.e.ivor_low[7] = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL];
776 sregs->u.e.ivor_low[8] = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL];
777 sregs->u.e.ivor_low[9] = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL];
778 sregs->u.e.ivor_low[10] = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER];
779 sregs->u.e.ivor_low[11] = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT];
780 sregs->u.e.ivor_low[12] = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG];
781 sregs->u.e.ivor_low[13] = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS];
782 sregs->u.e.ivor_low[14] = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS];
783 sregs->u.e.ivor_low[15] = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG];
784}
785
786int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
787{
788 if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
789 return 0;
790
791 vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = sregs->u.e.ivor_low[0];
792 vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = sregs->u.e.ivor_low[1];
793 vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = sregs->u.e.ivor_low[2];
794 vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = sregs->u.e.ivor_low[3];
795 vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = sregs->u.e.ivor_low[4];
796 vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = sregs->u.e.ivor_low[5];
797 vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = sregs->u.e.ivor_low[6];
798 vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = sregs->u.e.ivor_low[7];
799 vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = sregs->u.e.ivor_low[8];
800 vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = sregs->u.e.ivor_low[9];
801 vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = sregs->u.e.ivor_low[10];
802 vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = sregs->u.e.ivor_low[11];
803 vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = sregs->u.e.ivor_low[12];
804 vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = sregs->u.e.ivor_low[13];
805 vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = sregs->u.e.ivor_low[14];
806 vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = sregs->u.e.ivor_low[15];
807
808 return 0;
809}
810
bbf45ba5
HB		 811int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
812 struct kvm_sregs *sregs)
813{
5ce941ee
SW		 814 sregs->pvr = vcpu->arch.pvr;
815
816 get_sregs_base(vcpu, sregs);
817 get_sregs_arch206(vcpu, sregs);
818 kvmppc_core_get_sregs(vcpu, sregs);
819 return 0;
bbf45ba5
HB		 820}
821
822int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
823 struct kvm_sregs *sregs)
824{
5ce941ee
SW		 825 int ret;
826
827 if (vcpu->arch.pvr != sregs->pvr)
828 return -EINVAL;
829
830 ret = set_sregs_base(vcpu, sregs);
831 if (ret < 0)
832 return ret;
833
834 ret = set_sregs_arch206(vcpu, sregs);
835 if (ret < 0)
836 return ret;
837
838 return kvmppc_core_set_sregs(vcpu, sregs);
bbf45ba5
HB		 839}
840
841int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
842{
843 return -ENOTSUPP;
844}
845
846int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
847{
848 return -ENOTSUPP;
849}
850
bbf45ba5
HB		 851int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
852 struct kvm_translation *tr)
853{
98001d8d
AK		 854 int r;
855
98001d8d 856 r = kvmppc_core_vcpu_translate(vcpu, tr);
98001d8d 857 return r;
bbf45ba5 858}
d9fbd03d 859
4e755758
AG		 860int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
861{
862 return -ENOTSUPP;
863}
864
2986b8c7 865int __init kvmppc_booke_init(void)
d9fbd03d
HB		 866{
867 unsigned long ivor[16];
868 unsigned long max_ivor = 0;
869 int i;
870
871 /* We install our own exception handlers by hijacking IVPR. IVPR must
872 * be 16-bit aligned, so we need a 64KB allocation. */
873 kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
874 VCPU_SIZE_ORDER);
875 if (!kvmppc_booke_handlers)
876 return -ENOMEM;
877
878 /* XXX make sure our handlers are smaller than Linux's */
879
880 /* Copy our interrupt handlers to match host IVORs. That way we don't
881 * have to swap the IVORs on every guest/host transition. */
882 ivor[0] = mfspr(SPRN_IVOR0);
883 ivor[1] = mfspr(SPRN_IVOR1);
884 ivor[2] = mfspr(SPRN_IVOR2);
885 ivor[3] = mfspr(SPRN_IVOR3);
886 ivor[4] = mfspr(SPRN_IVOR4);
887 ivor[5] = mfspr(SPRN_IVOR5);
888 ivor[6] = mfspr(SPRN_IVOR6);
889 ivor[7] = mfspr(SPRN_IVOR7);
890 ivor[8] = mfspr(SPRN_IVOR8);
891 ivor[9] = mfspr(SPRN_IVOR9);
892 ivor[10] = mfspr(SPRN_IVOR10);
893 ivor[11] = mfspr(SPRN_IVOR11);
894 ivor[12] = mfspr(SPRN_IVOR12);
895 ivor[13] = mfspr(SPRN_IVOR13);
896 ivor[14] = mfspr(SPRN_IVOR14);
897 ivor[15] = mfspr(SPRN_IVOR15);
898
899 for (i = 0; i < 16; i++) {
900 if (ivor[i] > max_ivor)
901 max_ivor = ivor[i];
902
903 memcpy((void *)kvmppc_booke_handlers + ivor[i],
904 kvmppc_handlers_start + i * kvmppc_handler_len,
905 kvmppc_handler_len);
906 }
907 flush_icache_range(kvmppc_booke_handlers,
908 kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
909
db93f574 910 return 0;
d9fbd03d
HB		 911}
912
db93f574 913void __exit kvmppc_booke_exit(void)
d9fbd03d
HB		 914{
915 free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
916 kvm_exit();
917}
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