1 /*
2 * PAL/SAL call delegation
3 *
4 * Copyright (c) 2004 Li Susie <susie.li@intel.com>
5 * Copyright (c) 2005 Yu Ke <ke.yu@intel.com>
6 * Copyright (c) 2007 Xiantao Zhang <xiantao.zhang@intel.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms and conditions of the GNU General Public License,
10 * version 2, as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
19 * Place - Suite 330, Boston, MA 02111-1307 USA.
20 */
21
22 #include <linux/kvm_host.h>
23 #include <linux/smp.h>
24
25 #include "vti.h"
26 #include "misc.h"
27
28 #include <asm/pal.h>
29 #include <asm/sal.h>
30 #include <asm/tlb.h>
31
32 /*
33 * Handy macros to make sure that the PAL return values start out
34 * as something meaningful.
35 */
36 #define INIT_PAL_STATUS_UNIMPLEMENTED(x) \
37 { \
38 x.status = PAL_STATUS_UNIMPLEMENTED; \
39 x.v0 = 0; \
40 x.v1 = 0; \
41 x.v2 = 0; \
42 }
43
44 #define INIT_PAL_STATUS_SUCCESS(x) \
45 { \
46 x.status = PAL_STATUS_SUCCESS; \
47 x.v0 = 0; \
48 x.v1 = 0; \
49 x.v2 = 0; \
50 }
51
kvm_get_pal_call_data(struct kvm_vcpu * vcpu,u64 * gr28,u64 * gr29,u64 * gr30,u64 * gr31)52 static void kvm_get_pal_call_data(struct kvm_vcpu *vcpu,
53 u64 *gr28, u64 *gr29, u64 *gr30, u64 *gr31) {
54 struct exit_ctl_data *p;
55
56 if (vcpu) {
57 p = &vcpu->arch.exit_data;
58 if (p->exit_reason == EXIT_REASON_PAL_CALL) {
59 *gr28 = p->u.pal_data.gr28;
60 *gr29 = p->u.pal_data.gr29;
61 *gr30 = p->u.pal_data.gr30;
62 *gr31 = p->u.pal_data.gr31;
63 return ;
64 }
65 }
66 printk(KERN_DEBUG"Failed to get vcpu pal data!!!\n");
67 }
68
set_pal_result(struct kvm_vcpu * vcpu,struct ia64_pal_retval result)69 static void set_pal_result(struct kvm_vcpu *vcpu,
70 struct ia64_pal_retval result) {
71
72 struct exit_ctl_data *p;
73
74 p = kvm_get_exit_data(vcpu);
75 if (p && p->exit_reason == EXIT_REASON_PAL_CALL) {
76 p->u.pal_data.ret = result;
77 return ;
78 }
79 INIT_PAL_STATUS_UNIMPLEMENTED(p->u.pal_data.ret);
80 }
81
set_sal_result(struct kvm_vcpu * vcpu,struct sal_ret_values result)82 static void set_sal_result(struct kvm_vcpu *vcpu,
83 struct sal_ret_values result) {
84 struct exit_ctl_data *p;
85
86 p = kvm_get_exit_data(vcpu);
87 if (p && p->exit_reason == EXIT_REASON_SAL_CALL) {
88 p->u.sal_data.ret = result;
89 return ;
90 }
91 printk(KERN_WARNING"Failed to set sal result!!\n");
92 }
93
94 struct cache_flush_args {
95 u64 cache_type;
96 u64 operation;
97 u64 progress;
98 long status;
99 };
100
101 cpumask_t cpu_cache_coherent_map;
102
remote_pal_cache_flush(void * data)103 static void remote_pal_cache_flush(void *data)
104 {
105 struct cache_flush_args *args = data;
106 long status;
107 u64 progress = args->progress;
108
109 status = ia64_pal_cache_flush(args->cache_type, args->operation,
110 &progress, NULL);
111 if (status != 0)
112 args->status = status;
113 }
114
pal_cache_flush(struct kvm_vcpu * vcpu)115 static struct ia64_pal_retval pal_cache_flush(struct kvm_vcpu *vcpu)
116 {
117 u64 gr28, gr29, gr30, gr31;
118 struct ia64_pal_retval result = {0, 0, 0, 0};
119 struct cache_flush_args args = {0, 0, 0, 0};
120 long psr;
121
122 gr28 = gr29 = gr30 = gr31 = 0;
123 kvm_get_pal_call_data(vcpu, &gr28, &gr29, &gr30, &gr31);
124
125 if (gr31 != 0)
126 printk(KERN_ERR"vcpu:%p called cache_flush error!\n", vcpu);
127
128 /* Always call Host Pal in int=1 */
129 gr30 &= ~PAL_CACHE_FLUSH_CHK_INTRS;
130 args.cache_type = gr29;
131 args.operation = gr30;
132 smp_call_function(remote_pal_cache_flush,
133 (void *)&args, 1);
134 if (args.status != 0)
135 printk(KERN_ERR"pal_cache_flush error!,"
136 "status:0x%lx\n", args.status);
137 /*
138 * Call Host PAL cache flush
139 * Clear psr.ic when call PAL_CACHE_FLUSH
140 */
141 local_irq_save(psr);
142 result.status = ia64_pal_cache_flush(gr29, gr30, &result.v1,
143 &result.v0);
144 local_irq_restore(psr);
145 if (result.status != 0)
146 printk(KERN_ERR"vcpu:%p crashed due to cache_flush err:%ld"
147 "in1:%lx,in2:%lx\n",
148 vcpu, result.status, gr29, gr30);
149
150 #if 0
151 if (gr29 == PAL_CACHE_TYPE_COHERENT) {
152 cpus_setall(vcpu->arch.cache_coherent_map);
153 cpu_clear(vcpu->cpu, vcpu->arch.cache_coherent_map);
154 cpus_setall(cpu_cache_coherent_map);
155 cpu_clear(vcpu->cpu, cpu_cache_coherent_map);
156 }
157 #endif
158 return result;
159 }
160
pal_cache_summary(struct kvm_vcpu * vcpu)161 struct ia64_pal_retval pal_cache_summary(struct kvm_vcpu *vcpu)
162 {
163
164 struct ia64_pal_retval result;
165
166 PAL_CALL(result, PAL_CACHE_SUMMARY, 0, 0, 0);
167 return result;
168 }
169
pal_freq_base(struct kvm_vcpu * vcpu)170 static struct ia64_pal_retval pal_freq_base(struct kvm_vcpu *vcpu)
171 {
172
173 struct ia64_pal_retval result;
174
175 PAL_CALL(result, PAL_FREQ_BASE, 0, 0, 0);
176
177 /*
178 * PAL_FREQ_BASE may not be implemented in some platforms,
179 * call SAL instead.
180 */
181 if (result.v0 == 0) {
182 result.status = ia64_sal_freq_base(SAL_FREQ_BASE_PLATFORM,
183 &result.v0,
184 &result.v1);
185 result.v2 = 0;
186 }
187
188 return result;
189 }
190
pal_freq_ratios(struct kvm_vcpu * vcpu)191 static struct ia64_pal_retval pal_freq_ratios(struct kvm_vcpu *vcpu)
192 {
193
194 struct ia64_pal_retval result;
195
196 PAL_CALL(result, PAL_FREQ_RATIOS, 0, 0, 0);
197 return result;
198 }
199
pal_logical_to_physica(struct kvm_vcpu * vcpu)200 static struct ia64_pal_retval pal_logical_to_physica(struct kvm_vcpu *vcpu)
201 {
202 struct ia64_pal_retval result;
203
204 INIT_PAL_STATUS_UNIMPLEMENTED(result);
205 return result;
206 }
207
pal_platform_addr(struct kvm_vcpu * vcpu)208 static struct ia64_pal_retval pal_platform_addr(struct kvm_vcpu *vcpu)
209 {
210
211 struct ia64_pal_retval result;
212
213 INIT_PAL_STATUS_SUCCESS(result);
214 return result;
215 }
216
pal_proc_get_features(struct kvm_vcpu * vcpu)217 static struct ia64_pal_retval pal_proc_get_features(struct kvm_vcpu *vcpu)
218 {
219
220 struct ia64_pal_retval result = {0, 0, 0, 0};
221 long in0, in1, in2, in3;
222
223 kvm_get_pal_call_data(vcpu, &in0, &in1, &in2, &in3);
224 result.status = ia64_pal_proc_get_features(&result.v0, &result.v1,
225 &result.v2, in2);
226
227 return result;
228 }
229
pal_cache_info(struct kvm_vcpu * vcpu)230 static struct ia64_pal_retval pal_cache_info(struct kvm_vcpu *vcpu)
231 {
232
233 pal_cache_config_info_t ci;
234 long status;
235 unsigned long in0, in1, in2, in3, r9, r10;
236
237 kvm_get_pal_call_data(vcpu, &in0, &in1, &in2, &in3);
238 status = ia64_pal_cache_config_info(in1, in2, &ci);
239 r9 = ci.pcci_info_1.pcci1_data;
240 r10 = ci.pcci_info_2.pcci2_data;
241 return ((struct ia64_pal_retval){status, r9, r10, 0});
242 }
243
244 #define GUEST_IMPL_VA_MSB 59
245 #define GUEST_RID_BITS 18
246
pal_vm_summary(struct kvm_vcpu * vcpu)247 static struct ia64_pal_retval pal_vm_summary(struct kvm_vcpu *vcpu)
248 {
249
250 pal_vm_info_1_u_t vminfo1;
251 pal_vm_info_2_u_t vminfo2;
252 struct ia64_pal_retval result;
253
254 PAL_CALL(result, PAL_VM_SUMMARY, 0, 0, 0);
255 if (!result.status) {
256 vminfo1.pvi1_val = result.v0;
257 vminfo1.pal_vm_info_1_s.max_itr_entry = 8;
258 vminfo1.pal_vm_info_1_s.max_dtr_entry = 8;
259 result.v0 = vminfo1.pvi1_val;
260 vminfo2.pal_vm_info_2_s.impl_va_msb = GUEST_IMPL_VA_MSB;
261 vminfo2.pal_vm_info_2_s.rid_size = GUEST_RID_BITS;
262 result.v1 = vminfo2.pvi2_val;
263 }
264
265 return result;
266 }
267
pal_vm_info(struct kvm_vcpu * vcpu)268 static struct ia64_pal_retval pal_vm_info(struct kvm_vcpu *vcpu)
269 {
270 struct ia64_pal_retval result;
271
272 INIT_PAL_STATUS_UNIMPLEMENTED(result);
273
274 return result;
275 }
276
kvm_get_pal_call_index(struct kvm_vcpu * vcpu)277 static u64 kvm_get_pal_call_index(struct kvm_vcpu *vcpu)
278 {
279 u64 index = 0;
280 struct exit_ctl_data *p;
281
282 p = kvm_get_exit_data(vcpu);
283 if (p && (p->exit_reason == EXIT_REASON_PAL_CALL))
284 index = p->u.pal_data.gr28;
285
286 return index;
287 }
288
prepare_for_halt(struct kvm_vcpu * vcpu)289 static void prepare_for_halt(struct kvm_vcpu *vcpu)
290 {
291 vcpu->arch.timer_pending = 1;
292 vcpu->arch.timer_fired = 0;
293 }
294
kvm_pal_emul(struct kvm_vcpu * vcpu,struct kvm_run * run)295 int kvm_pal_emul(struct kvm_vcpu *vcpu, struct kvm_run *run)
296 {
297
298 u64 gr28;
299 struct ia64_pal_retval result;
300 int ret = 1;
301
302 gr28 = kvm_get_pal_call_index(vcpu);
303 /*printk("pal_call index:%lx\n",gr28);*/
304 switch (gr28) {
305 case PAL_CACHE_FLUSH:
306 result = pal_cache_flush(vcpu);
307 break;
308 case PAL_CACHE_SUMMARY:
309 result = pal_cache_summary(vcpu);
310 break;
311 case PAL_HALT_LIGHT:
312 {
313 INIT_PAL_STATUS_SUCCESS(result);
314 prepare_for_halt(vcpu);
315 if (kvm_highest_pending_irq(vcpu) == -1)
316 ret = kvm_emulate_halt(vcpu);
317 }
318 break;
319
320 case PAL_FREQ_RATIOS:
321 result = pal_freq_ratios(vcpu);
322 break;
323
324 case PAL_FREQ_BASE:
325 result = pal_freq_base(vcpu);
326 break;
327
328 case PAL_LOGICAL_TO_PHYSICAL :
329 result = pal_logical_to_physica(vcpu);
330 break;
331
332 case PAL_VM_SUMMARY :
333 result = pal_vm_summary(vcpu);
334 break;
335
336 case PAL_VM_INFO :
337 result = pal_vm_info(vcpu);
338 break;
339 case PAL_PLATFORM_ADDR :
340 result = pal_platform_addr(vcpu);
341 break;
342 case PAL_CACHE_INFO:
343 result = pal_cache_info(vcpu);
344 break;
345 case PAL_PTCE_INFO:
346 INIT_PAL_STATUS_SUCCESS(result);
347 result.v1 = (1L << 32) | 1L;
348 break;
349 case PAL_VM_PAGE_SIZE:
350 result.status = ia64_pal_vm_page_size(&result.v0,
351 &result.v1);
352 break;
353 case PAL_RSE_INFO:
354 result.status = ia64_pal_rse_info(&result.v0,
355 (pal_hints_u_t *)&result.v1);
356 break;
357 case PAL_PROC_GET_FEATURES:
358 result = pal_proc_get_features(vcpu);
359 break;
360 case PAL_DEBUG_INFO:
361 result.status = ia64_pal_debug_info(&result.v0,
362 &result.v1);
363 break;
364 case PAL_VERSION:
365 result.status = ia64_pal_version(
366 (pal_version_u_t *)&result.v0,
367 (pal_version_u_t *)&result.v1);
368
369 break;
370 case PAL_FIXED_ADDR:
371 result.status = PAL_STATUS_SUCCESS;
372 result.v0 = vcpu->vcpu_id;
373 break;
374 default:
375 INIT_PAL_STATUS_UNIMPLEMENTED(result);
376 printk(KERN_WARNING"kvm: Unsupported pal call,"
377 " index:0x%lx\n", gr28);
378 }
379 set_pal_result(vcpu, result);
380 return ret;
381 }
382
sal_emulator(struct kvm * kvm,long index,unsigned long in1,unsigned long in2,unsigned long in3,unsigned long in4,unsigned long in5,unsigned long in6,unsigned long in7)383 static struct sal_ret_values sal_emulator(struct kvm *kvm,
384 long index, unsigned long in1,
385 unsigned long in2, unsigned long in3,
386 unsigned long in4, unsigned long in5,
387 unsigned long in6, unsigned long in7)
388 {
389 unsigned long r9 = 0;
390 unsigned long r10 = 0;
391 long r11 = 0;
392 long status;
393
394 status = 0;
395 switch (index) {
396 case SAL_FREQ_BASE:
397 status = ia64_sal_freq_base(in1, &r9, &r10);
398 break;
399 case SAL_PCI_CONFIG_READ:
400 printk(KERN_WARNING"kvm: Not allowed to call here!"
401 " SAL_PCI_CONFIG_READ\n");
402 break;
403 case SAL_PCI_CONFIG_WRITE:
404 printk(KERN_WARNING"kvm: Not allowed to call here!"
405 " SAL_PCI_CONFIG_WRITE\n");
406 break;
407 case SAL_SET_VECTORS:
408 if (in1 == SAL_VECTOR_OS_BOOT_RENDEZ) {
409 if (in4 != 0 || in5 != 0 || in6 != 0 || in7 != 0) {
410 status = -2;
411 } else {
412 kvm->arch.rdv_sal_data.boot_ip = in2;
413 kvm->arch.rdv_sal_data.boot_gp = in3;
414 }
415 printk("Rendvous called! iip:%lx\n\n", in2);
416 } else
417 printk(KERN_WARNING"kvm: CALLED SAL_SET_VECTORS %lu."
418 "ignored...\n", in1);
419 break;
420 case SAL_GET_STATE_INFO:
421 /* No more info. */
422 status = -5;
423 r9 = 0;
424 break;
425 case SAL_GET_STATE_INFO_SIZE:
426 /* Return a dummy size. */
427 status = 0;
428 r9 = 128;
429 break;
430 case SAL_CLEAR_STATE_INFO:
431 /* Noop. */
432 break;
433 case SAL_MC_RENDEZ:
434 printk(KERN_WARNING
435 "kvm: called SAL_MC_RENDEZ. ignored...\n");
436 break;
437 case SAL_MC_SET_PARAMS:
438 printk(KERN_WARNING
439 "kvm: called SAL_MC_SET_PARAMS.ignored!\n");
440 break;
441 case SAL_CACHE_FLUSH:
442 if (1) {
443 /*Flush using SAL.
444 This method is faster but has a side
445 effect on other vcpu running on
446 this cpu. */
447 status = ia64_sal_cache_flush(in1);
448 } else {
449 /*Maybe need to implement the method
450 without side effect!*/
451 status = 0;
452 }
453 break;
454 case SAL_CACHE_INIT:
455 printk(KERN_WARNING
456 "kvm: called SAL_CACHE_INIT. ignored...\n");
457 break;
458 case SAL_UPDATE_PAL:
459 printk(KERN_WARNING
460 "kvm: CALLED SAL_UPDATE_PAL. ignored...\n");
461 break;
462 default:
463 printk(KERN_WARNING"kvm: called SAL_CALL with unknown index."
464 " index:%ld\n", index);
465 status = -1;
466 break;
467 }
468 return ((struct sal_ret_values) {status, r9, r10, r11});
469 }
470
kvm_get_sal_call_data(struct kvm_vcpu * vcpu,u64 * in0,u64 * in1,u64 * in2,u64 * in3,u64 * in4,u64 * in5,u64 * in6,u64 * in7)471 static void kvm_get_sal_call_data(struct kvm_vcpu *vcpu, u64 *in0, u64 *in1,
472 u64 *in2, u64 *in3, u64 *in4, u64 *in5, u64 *in6, u64 *in7){
473
474 struct exit_ctl_data *p;
475
476 p = kvm_get_exit_data(vcpu);
477
478 if (p) {
479 if (p->exit_reason == EXIT_REASON_SAL_CALL) {
480 *in0 = p->u.sal_data.in0;
481 *in1 = p->u.sal_data.in1;
482 *in2 = p->u.sal_data.in2;
483 *in3 = p->u.sal_data.in3;
484 *in4 = p->u.sal_data.in4;
485 *in5 = p->u.sal_data.in5;
486 *in6 = p->u.sal_data.in6;
487 *in7 = p->u.sal_data.in7;
488 return ;
489 }
490 }
491 *in0 = 0;
492 }
493
kvm_sal_emul(struct kvm_vcpu * vcpu)494 void kvm_sal_emul(struct kvm_vcpu *vcpu)
495 {
496
497 struct sal_ret_values result;
498 u64 index, in1, in2, in3, in4, in5, in6, in7;
499
500 kvm_get_sal_call_data(vcpu, &index, &in1, &in2,
501 &in3, &in4, &in5, &in6, &in7);
502 result = sal_emulator(vcpu->kvm, index, in1, in2, in3,
503 in4, in5, in6, in7);
504 set_sal_result(vcpu, result);
505 }
506