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   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
  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
  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
  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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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 }