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Hollis Blanchardbbf45ba2008-04-16 23:28:09 -05001/*
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
16 *
17 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
18 * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
19 */
20
21#include <linux/errno.h>
22#include <linux/err.h>
23#include <linux/kvm_host.h>
24#include <linux/module.h>
25#include <linux/vmalloc.h>
26#include <linux/fs.h>
27#include <asm/cputable.h>
28#include <asm/uaccess.h>
29#include <asm/kvm_ppc.h>
Hollis Blanchardd9fbd032008-11-05 09:36:13 -060030#include <asm/cacheflush.h>
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -050031
Hollis Blanchard75f74f02008-11-05 09:36:16 -060032#include "booke.h"
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -050033#include "44x_tlb.h"
34
Hollis Blanchardd9fbd032008-11-05 09:36:13 -060035unsigned long kvmppc_booke_handlers;
36
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -050037#define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
38#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
39
40struct kvm_stats_debugfs_item debugfs_entries[] = {
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -050041 { "mmio", VCPU_STAT(mmio_exits) },
42 { "dcr", VCPU_STAT(dcr_exits) },
43 { "sig", VCPU_STAT(signal_exits) },
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -050044 { "itlb_r", VCPU_STAT(itlb_real_miss_exits) },
45 { "itlb_v", VCPU_STAT(itlb_virt_miss_exits) },
46 { "dtlb_r", VCPU_STAT(dtlb_real_miss_exits) },
47 { "dtlb_v", VCPU_STAT(dtlb_virt_miss_exits) },
48 { "sysc", VCPU_STAT(syscall_exits) },
49 { "isi", VCPU_STAT(isi_exits) },
50 { "dsi", VCPU_STAT(dsi_exits) },
51 { "inst_emu", VCPU_STAT(emulated_inst_exits) },
52 { "dec", VCPU_STAT(dec_exits) },
53 { "ext_intr", VCPU_STAT(ext_intr_exits) },
Hollis Blanchard45c5eb62008-04-25 17:55:49 -050054 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -050055 { NULL }
56};
57
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -050058/* TODO: use vcpu_printf() */
59void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
60{
61 int i;
62
Hollis Blanchard5cf8ca22008-11-05 09:36:19 -060063 printk("pc: %08lx msr: %08lx\n", vcpu->arch.pc, vcpu->arch.msr);
64 printk("lr: %08lx ctr: %08lx\n", vcpu->arch.lr, vcpu->arch.ctr);
65 printk("srr0: %08lx srr1: %08lx\n", vcpu->arch.srr0, vcpu->arch.srr1);
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -050066
67 printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
68
69 for (i = 0; i < 32; i += 4) {
Hollis Blanchard5cf8ca22008-11-05 09:36:19 -060070 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -050071 vcpu->arch.gpr[i],
72 vcpu->arch.gpr[i+1],
73 vcpu->arch.gpr[i+2],
74 vcpu->arch.gpr[i+3]);
75 }
76}
77
Hollis Blanchardd4cf3892008-11-05 09:36:23 -060078static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
79 unsigned int priority)
Hollis Blanchard9dd921c2008-11-05 09:36:14 -060080{
Hollis Blanchard9dd921c2008-11-05 09:36:14 -060081 set_bit(priority, &vcpu->arch.pending_exceptions);
82}
83
Hollis Blanchard9dd921c2008-11-05 09:36:14 -060084void kvmppc_core_queue_program(struct kvm_vcpu *vcpu)
85{
Hollis Blanchardd4cf3892008-11-05 09:36:23 -060086 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
Hollis Blanchard9dd921c2008-11-05 09:36:14 -060087}
88
89void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
90{
Hollis Blanchardd4cf3892008-11-05 09:36:23 -060091 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
Hollis Blanchard9dd921c2008-11-05 09:36:14 -060092}
93
94int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
95{
Hollis Blanchardd4cf3892008-11-05 09:36:23 -060096 return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
Hollis Blanchard9dd921c2008-11-05 09:36:14 -060097}
98
99void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
100 struct kvm_interrupt *irq)
101{
Hollis Blanchardd4cf3892008-11-05 09:36:23 -0600102 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_EXTERNAL);
Hollis Blanchard9dd921c2008-11-05 09:36:14 -0600103}
104
Hollis Blanchardd4cf3892008-11-05 09:36:23 -0600105/* Deliver the interrupt of the corresponding priority, if possible. */
106static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
107 unsigned int priority)
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500108{
Hollis Blanchardd4cf3892008-11-05 09:36:23 -0600109 int allowed = 0;
110 ulong msr_mask;
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500111
Hollis Blanchardd4cf3892008-11-05 09:36:23 -0600112 switch (priority) {
113 case BOOKE_IRQPRIO_PROGRAM:
114 case BOOKE_IRQPRIO_DTLB_MISS:
115 case BOOKE_IRQPRIO_ITLB_MISS:
116 case BOOKE_IRQPRIO_SYSCALL:
117 case BOOKE_IRQPRIO_DATA_STORAGE:
118 case BOOKE_IRQPRIO_INST_STORAGE:
119 case BOOKE_IRQPRIO_FP_UNAVAIL:
120 case BOOKE_IRQPRIO_AP_UNAVAIL:
121 case BOOKE_IRQPRIO_ALIGNMENT:
122 allowed = 1;
123 msr_mask = MSR_CE|MSR_ME|MSR_DE;
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500124 break;
Hollis Blanchardd4cf3892008-11-05 09:36:23 -0600125 case BOOKE_IRQPRIO_CRITICAL:
126 case BOOKE_IRQPRIO_WATCHDOG:
127 allowed = vcpu->arch.msr & MSR_CE;
128 msr_mask = MSR_ME;
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500129 break;
Hollis Blanchardd4cf3892008-11-05 09:36:23 -0600130 case BOOKE_IRQPRIO_MACHINE_CHECK:
131 allowed = vcpu->arch.msr & MSR_ME;
132 msr_mask = 0;
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500133 break;
Hollis Blanchardd4cf3892008-11-05 09:36:23 -0600134 case BOOKE_IRQPRIO_EXTERNAL:
135 case BOOKE_IRQPRIO_DECREMENTER:
136 case BOOKE_IRQPRIO_FIT:
137 allowed = vcpu->arch.msr & MSR_EE;
138 msr_mask = MSR_CE|MSR_ME|MSR_DE;
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500139 break;
Hollis Blanchardd4cf3892008-11-05 09:36:23 -0600140 case BOOKE_IRQPRIO_DEBUG:
141 allowed = vcpu->arch.msr & MSR_DE;
142 msr_mask = MSR_ME;
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500143 break;
144 }
145
Hollis Blanchardd4cf3892008-11-05 09:36:23 -0600146 if (allowed) {
147 vcpu->arch.srr0 = vcpu->arch.pc;
148 vcpu->arch.srr1 = vcpu->arch.msr;
149 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
150 kvmppc_set_msr(vcpu, vcpu->arch.msr & msr_mask);
151
152 clear_bit(priority, &vcpu->arch.pending_exceptions);
153 }
154
155 return allowed;
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500156}
157
158/* Check pending exceptions and deliver one, if possible. */
Hollis Blanchard9dd921c2008-11-05 09:36:14 -0600159void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500160{
161 unsigned long *pending = &vcpu->arch.pending_exceptions;
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500162 unsigned int priority;
163
Hollis Blanchard9ab80842008-11-05 09:36:22 -0600164 priority = __ffs(*pending);
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500165 while (priority <= BOOKE_MAX_INTERRUPT) {
Hollis Blanchardd4cf3892008-11-05 09:36:23 -0600166 if (kvmppc_booke_irqprio_deliver(vcpu, priority))
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500167 break;
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500168
169 priority = find_next_bit(pending,
170 BITS_PER_BYTE * sizeof(*pending),
171 priority + 1);
172 }
173}
174
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500175/**
176 * kvmppc_handle_exit
177 *
178 * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
179 */
180int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
181 unsigned int exit_nr)
182{
183 enum emulation_result er;
184 int r = RESUME_HOST;
185
186 local_irq_enable();
187
188 run->exit_reason = KVM_EXIT_UNKNOWN;
189 run->ready_for_interrupt_injection = 1;
190
191 switch (exit_nr) {
192 case BOOKE_INTERRUPT_MACHINE_CHECK:
193 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
194 kvmppc_dump_vcpu(vcpu);
195 r = RESUME_HOST;
196 break;
197
198 case BOOKE_INTERRUPT_EXTERNAL:
Hollis Blanchard1b6766c2008-11-05 09:36:21 -0600199 vcpu->stat.ext_intr_exits++;
200 if (need_resched())
201 cond_resched();
202 r = RESUME_GUEST;
203 break;
204
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500205 case BOOKE_INTERRUPT_DECREMENTER:
206 /* Since we switched IVPR back to the host's value, the host
207 * handled this interrupt the moment we enabled interrupts.
208 * Now we just offer it a chance to reschedule the guest. */
209
210 /* XXX At this point the TLB still holds our shadow TLB, so if
211 * we do reschedule the host will fault over it. Perhaps we
212 * should politely restore the host's entries to minimize
213 * misses before ceding control. */
Hollis Blanchard1b6766c2008-11-05 09:36:21 -0600214 vcpu->stat.dec_exits++;
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500215 if (need_resched())
216 cond_resched();
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500217 r = RESUME_GUEST;
218 break;
219
220 case BOOKE_INTERRUPT_PROGRAM:
221 if (vcpu->arch.msr & MSR_PR) {
222 /* Program traps generated by user-level software must be handled
223 * by the guest kernel. */
224 vcpu->arch.esr = vcpu->arch.fault_esr;
Hollis Blanchardd4cf3892008-11-05 09:36:23 -0600225 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500226 r = RESUME_GUEST;
227 break;
228 }
229
230 er = kvmppc_emulate_instruction(run, vcpu);
231 switch (er) {
232 case EMULATE_DONE:
233 /* Future optimization: only reload non-volatiles if
234 * they were actually modified by emulation. */
235 vcpu->stat.emulated_inst_exits++;
236 r = RESUME_GUEST_NV;
237 break;
238 case EMULATE_DO_DCR:
239 run->exit_reason = KVM_EXIT_DCR;
Hollis Blanchard1b6766c2008-11-05 09:36:21 -0600240 vcpu->stat.dcr_exits++;
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500241 r = RESUME_HOST;
242 break;
243 case EMULATE_FAIL:
244 /* XXX Deliver Program interrupt to guest. */
Hollis Blanchard5cf8ca22008-11-05 09:36:19 -0600245 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500246 __func__, vcpu->arch.pc, vcpu->arch.last_inst);
247 /* For debugging, encode the failing instruction and
248 * report it to userspace. */
249 run->hw.hardware_exit_reason = ~0ULL << 32;
250 run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
251 r = RESUME_HOST;
252 break;
253 default:
254 BUG();
255 }
256 break;
257
Christian Ehrhardtde368dc2008-04-29 18:18:23 +0200258 case BOOKE_INTERRUPT_FP_UNAVAIL:
Hollis Blanchardd4cf3892008-11-05 09:36:23 -0600259 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
Christian Ehrhardtde368dc2008-04-29 18:18:23 +0200260 r = RESUME_GUEST;
261 break;
262
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500263 case BOOKE_INTERRUPT_DATA_STORAGE:
264 vcpu->arch.dear = vcpu->arch.fault_dear;
265 vcpu->arch.esr = vcpu->arch.fault_esr;
Hollis Blanchardd4cf3892008-11-05 09:36:23 -0600266 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500267 vcpu->stat.dsi_exits++;
268 r = RESUME_GUEST;
269 break;
270
271 case BOOKE_INTERRUPT_INST_STORAGE:
272 vcpu->arch.esr = vcpu->arch.fault_esr;
Hollis Blanchardd4cf3892008-11-05 09:36:23 -0600273 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500274 vcpu->stat.isi_exits++;
275 r = RESUME_GUEST;
276 break;
277
278 case BOOKE_INTERRUPT_SYSCALL:
Hollis Blanchardd4cf3892008-11-05 09:36:23 -0600279 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500280 vcpu->stat.syscall_exits++;
281 r = RESUME_GUEST;
282 break;
283
284 case BOOKE_INTERRUPT_DTLB_MISS: {
Hollis Blanchard0f55dc42008-11-05 09:36:12 -0600285 struct kvmppc_44x_tlbe *gtlbe;
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500286 unsigned long eaddr = vcpu->arch.fault_dear;
287 gfn_t gfn;
288
289 /* Check the guest TLB. */
290 gtlbe = kvmppc_44x_dtlb_search(vcpu, eaddr);
291 if (!gtlbe) {
292 /* The guest didn't have a mapping for it. */
Hollis Blanchardd4cf3892008-11-05 09:36:23 -0600293 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500294 vcpu->arch.dear = vcpu->arch.fault_dear;
295 vcpu->arch.esr = vcpu->arch.fault_esr;
296 vcpu->stat.dtlb_real_miss_exits++;
297 r = RESUME_GUEST;
298 break;
299 }
300
301 vcpu->arch.paddr_accessed = tlb_xlate(gtlbe, eaddr);
302 gfn = vcpu->arch.paddr_accessed >> PAGE_SHIFT;
303
304 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
305 /* The guest TLB had a mapping, but the shadow TLB
306 * didn't, and it is RAM. This could be because:
307 * a) the entry is mapping the host kernel, or
308 * b) the guest used a large mapping which we're faking
309 * Either way, we need to satisfy the fault without
310 * invoking the guest. */
Hollis Blanchard89168612008-12-02 15:51:53 -0600311 kvmppc_mmu_map(vcpu, eaddr, vcpu->arch.paddr_accessed, gtlbe->tid,
312 gtlbe->word2, get_tlb_bytes(gtlbe));
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500313 vcpu->stat.dtlb_virt_miss_exits++;
314 r = RESUME_GUEST;
315 } else {
316 /* Guest has mapped and accessed a page which is not
317 * actually RAM. */
318 r = kvmppc_emulate_mmio(run, vcpu);
Hollis Blanchard1b6766c2008-11-05 09:36:21 -0600319 vcpu->stat.mmio_exits++;
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500320 }
321
322 break;
323 }
324
325 case BOOKE_INTERRUPT_ITLB_MISS: {
Hollis Blanchard0f55dc42008-11-05 09:36:12 -0600326 struct kvmppc_44x_tlbe *gtlbe;
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500327 unsigned long eaddr = vcpu->arch.pc;
Hollis Blanchard89168612008-12-02 15:51:53 -0600328 gpa_t gpaddr;
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500329 gfn_t gfn;
330
331 r = RESUME_GUEST;
332
333 /* Check the guest TLB. */
334 gtlbe = kvmppc_44x_itlb_search(vcpu, eaddr);
335 if (!gtlbe) {
336 /* The guest didn't have a mapping for it. */
Hollis Blanchardd4cf3892008-11-05 09:36:23 -0600337 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500338 vcpu->stat.itlb_real_miss_exits++;
339 break;
340 }
341
342 vcpu->stat.itlb_virt_miss_exits++;
343
Hollis Blanchard89168612008-12-02 15:51:53 -0600344 gpaddr = tlb_xlate(gtlbe, eaddr);
345 gfn = gpaddr >> PAGE_SHIFT;
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500346
347 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
348 /* The guest TLB had a mapping, but the shadow TLB
349 * didn't. This could be because:
350 * a) the entry is mapping the host kernel, or
351 * b) the guest used a large mapping which we're faking
352 * Either way, we need to satisfy the fault without
353 * invoking the guest. */
Hollis Blanchard89168612008-12-02 15:51:53 -0600354 kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlbe->tid,
355 gtlbe->word2, get_tlb_bytes(gtlbe));
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500356 } else {
357 /* Guest mapped and leaped at non-RAM! */
Hollis Blanchardd4cf3892008-11-05 09:36:23 -0600358 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500359 }
360
361 break;
362 }
363
Hollis Blanchard6a0ab732008-07-25 13:54:49 -0500364 case BOOKE_INTERRUPT_DEBUG: {
365 u32 dbsr;
366
367 vcpu->arch.pc = mfspr(SPRN_CSRR0);
368
369 /* clear IAC events in DBSR register */
370 dbsr = mfspr(SPRN_DBSR);
371 dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4;
372 mtspr(SPRN_DBSR, dbsr);
373
374 run->exit_reason = KVM_EXIT_DEBUG;
375 r = RESUME_HOST;
376 break;
377 }
378
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500379 default:
380 printk(KERN_EMERG "exit_nr %d\n", exit_nr);
381 BUG();
382 }
383
384 local_irq_disable();
385
Hollis Blanchard9dd921c2008-11-05 09:36:14 -0600386 kvmppc_core_deliver_interrupts(vcpu);
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500387
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500388 if (!(r & RESUME_HOST)) {
389 /* To avoid clobbering exit_reason, only check for signals if
390 * we aren't already exiting to userspace for some other
391 * reason. */
392 if (signal_pending(current)) {
393 run->exit_reason = KVM_EXIT_INTR;
394 r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500395 vcpu->stat.signal_exits++;
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500396 }
397 }
398
399 return r;
400}
401
402/* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
403int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
404{
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500405 vcpu->arch.pc = 0;
406 vcpu->arch.msr = 0;
407 vcpu->arch.gpr[1] = (16<<20) - 8; /* -8 for the callee-save LR slot */
408
Hollis Blanchard49dd2c42008-07-25 13:54:53 -0500409 vcpu->arch.shadow_pid = 1;
410
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500411 /* Eye-catching number so we know if the guest takes an interrupt
412 * before it's programmed its own IVPR. */
413 vcpu->arch.ivpr = 0x55550000;
414
Hollis Blanchard5cbb5102008-11-05 09:36:17 -0600415 return kvmppc_core_vcpu_setup(vcpu);
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500416}
417
418int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
419{
420 int i;
421
422 regs->pc = vcpu->arch.pc;
423 regs->cr = vcpu->arch.cr;
424 regs->ctr = vcpu->arch.ctr;
425 regs->lr = vcpu->arch.lr;
426 regs->xer = vcpu->arch.xer;
427 regs->msr = vcpu->arch.msr;
428 regs->srr0 = vcpu->arch.srr0;
429 regs->srr1 = vcpu->arch.srr1;
430 regs->pid = vcpu->arch.pid;
431 regs->sprg0 = vcpu->arch.sprg0;
432 regs->sprg1 = vcpu->arch.sprg1;
433 regs->sprg2 = vcpu->arch.sprg2;
434 regs->sprg3 = vcpu->arch.sprg3;
435 regs->sprg5 = vcpu->arch.sprg4;
436 regs->sprg6 = vcpu->arch.sprg5;
437 regs->sprg7 = vcpu->arch.sprg6;
438
439 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
440 regs->gpr[i] = vcpu->arch.gpr[i];
441
442 return 0;
443}
444
445int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
446{
447 int i;
448
449 vcpu->arch.pc = regs->pc;
450 vcpu->arch.cr = regs->cr;
451 vcpu->arch.ctr = regs->ctr;
452 vcpu->arch.lr = regs->lr;
453 vcpu->arch.xer = regs->xer;
Hollis Blanchardb8fd68a2008-11-05 09:36:20 -0600454 kvmppc_set_msr(vcpu, regs->msr);
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500455 vcpu->arch.srr0 = regs->srr0;
456 vcpu->arch.srr1 = regs->srr1;
457 vcpu->arch.sprg0 = regs->sprg0;
458 vcpu->arch.sprg1 = regs->sprg1;
459 vcpu->arch.sprg2 = regs->sprg2;
460 vcpu->arch.sprg3 = regs->sprg3;
461 vcpu->arch.sprg5 = regs->sprg4;
462 vcpu->arch.sprg6 = regs->sprg5;
463 vcpu->arch.sprg7 = regs->sprg6;
464
465 for (i = 0; i < ARRAY_SIZE(vcpu->arch.gpr); i++)
466 vcpu->arch.gpr[i] = regs->gpr[i];
467
468 return 0;
469}
470
471int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
472 struct kvm_sregs *sregs)
473{
474 return -ENOTSUPP;
475}
476
477int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
478 struct kvm_sregs *sregs)
479{
480 return -ENOTSUPP;
481}
482
483int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
484{
485 return -ENOTSUPP;
486}
487
488int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
489{
490 return -ENOTSUPP;
491}
492
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500493int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
494 struct kvm_translation *tr)
495{
Hollis Blanchard5cbb5102008-11-05 09:36:17 -0600496 return kvmppc_core_vcpu_translate(vcpu, tr);
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500497}
Hollis Blanchardd9fbd032008-11-05 09:36:13 -0600498
Hollis Blancharddb93f572008-11-05 09:36:18 -0600499int kvmppc_booke_init(void)
Hollis Blanchardd9fbd032008-11-05 09:36:13 -0600500{
501 unsigned long ivor[16];
502 unsigned long max_ivor = 0;
503 int i;
504
505 /* We install our own exception handlers by hijacking IVPR. IVPR must
506 * be 16-bit aligned, so we need a 64KB allocation. */
507 kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
508 VCPU_SIZE_ORDER);
509 if (!kvmppc_booke_handlers)
510 return -ENOMEM;
511
512 /* XXX make sure our handlers are smaller than Linux's */
513
514 /* Copy our interrupt handlers to match host IVORs. That way we don't
515 * have to swap the IVORs on every guest/host transition. */
516 ivor[0] = mfspr(SPRN_IVOR0);
517 ivor[1] = mfspr(SPRN_IVOR1);
518 ivor[2] = mfspr(SPRN_IVOR2);
519 ivor[3] = mfspr(SPRN_IVOR3);
520 ivor[4] = mfspr(SPRN_IVOR4);
521 ivor[5] = mfspr(SPRN_IVOR5);
522 ivor[6] = mfspr(SPRN_IVOR6);
523 ivor[7] = mfspr(SPRN_IVOR7);
524 ivor[8] = mfspr(SPRN_IVOR8);
525 ivor[9] = mfspr(SPRN_IVOR9);
526 ivor[10] = mfspr(SPRN_IVOR10);
527 ivor[11] = mfspr(SPRN_IVOR11);
528 ivor[12] = mfspr(SPRN_IVOR12);
529 ivor[13] = mfspr(SPRN_IVOR13);
530 ivor[14] = mfspr(SPRN_IVOR14);
531 ivor[15] = mfspr(SPRN_IVOR15);
532
533 for (i = 0; i < 16; i++) {
534 if (ivor[i] > max_ivor)
535 max_ivor = ivor[i];
536
537 memcpy((void *)kvmppc_booke_handlers + ivor[i],
538 kvmppc_handlers_start + i * kvmppc_handler_len,
539 kvmppc_handler_len);
540 }
541 flush_icache_range(kvmppc_booke_handlers,
542 kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
543
Hollis Blancharddb93f572008-11-05 09:36:18 -0600544 return 0;
Hollis Blanchardd9fbd032008-11-05 09:36:13 -0600545}
546
Hollis Blancharddb93f572008-11-05 09:36:18 -0600547void __exit kvmppc_booke_exit(void)
Hollis Blanchardd9fbd032008-11-05 09:36:13 -0600548{
549 free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
550 kvm_exit();
551}