include/asm-ia64/kvm_host.h

   1 /*
   2  * kvm_host.h: used for kvm module, and hold ia64-specific sections.
   3  *
   4  * Copyright (C) 2007, Intel Corporation.
   5  *
   6  * 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
  23 #ifndef __ASM_KVM_HOST_H
  24 #define __ASM_KVM_HOST_H
  25
  26
  27 #include <linux/types.h>
  28 #include <linux/mm.h>
  29 #include <linux/kvm.h>
  30 #include <linux/kvm_para.h>
  31 #include <linux/kvm_types.h>
  32
  33 #include <asm/pal.h>
  34 #include <asm/sal.h>
  35
  36 #define KVM_MAX_VCPUS 4
  37 #define KVM_MEMORY_SLOTS 32
  38 /* memory slots that does not exposed to userspace */
  39 #define KVM_PRIVATE_MEM_SLOTS 4
  40
  41
  42 /* define exit reasons from vmm to kvm*/
  43 #define EXIT_REASON_VM_PANIC            0
  44 #define EXIT_REASON_MMIO_INSTRUCTION    1
  45 #define EXIT_REASON_PAL_CALL            2
  46 #define EXIT_REASON_SAL_CALL            3
  47 #define EXIT_REASON_SWITCH_RR6          4
  48 #define EXIT_REASON_VM_DESTROY          5
  49 #define EXIT_REASON_EXTERNAL_INTERRUPT  6
  50 #define EXIT_REASON_IPI                 7
  51 #define EXIT_REASON_PTC_G               8
  52
  53 /*Define vmm address space and vm data space.*/
  54 #define KVM_VMM_SIZE (16UL<<20)
  55 #define KVM_VMM_SHIFT 24
  56 #define KVM_VMM_BASE 0xD000000000000000UL
  57 #define VMM_SIZE (8UL<<20)
  58
  59 /*
  60  * Define vm_buffer, used by PAL Services, base address.
  61  * Note: vmbuffer is in the VMM-BLOCK, the size must be < 8M
  62  */
  63 #define KVM_VM_BUFFER_BASE (KVM_VMM_BASE + VMM_SIZE)
  64 #define KVM_VM_BUFFER_SIZE (8UL<<20)
  65
  66 /*Define Virtual machine data layout.*/
  67 #define KVM_VM_DATA_SHIFT  24
  68 #define KVM_VM_DATA_SIZE (1UL << KVM_VM_DATA_SHIFT)
  69 #define KVM_VM_DATA_BASE (KVM_VMM_BASE + KVM_VMM_SIZE)
  70
  71
  72 #define KVM_P2M_BASE    KVM_VM_DATA_BASE
  73 #define KVM_P2M_OFS     0
  74 #define KVM_P2M_SIZE    (8UL << 20)
  75
  76 #define KVM_VHPT_BASE   (KVM_P2M_BASE + KVM_P2M_SIZE)
  77 #define KVM_VHPT_OFS    KVM_P2M_SIZE
  78 #define KVM_VHPT_BLOCK_SIZE   (2UL << 20)
  79 #define VHPT_SHIFT      18
  80 #define VHPT_SIZE       (1UL << VHPT_SHIFT)
  81 #define VHPT_NUM_ENTRIES (1<<(VHPT_SHIFT-5))
  82
  83 #define KVM_VTLB_BASE   (KVM_VHPT_BASE+KVM_VHPT_BLOCK_SIZE)
  84 #define KVM_VTLB_OFS    (KVM_VHPT_OFS+KVM_VHPT_BLOCK_SIZE)
  85 #define KVM_VTLB_BLOCK_SIZE   (1UL<<20)
  86 #define VTLB_SHIFT      17
  87 #define VTLB_SIZE       (1UL<<VTLB_SHIFT)
  88 #define VTLB_NUM_ENTRIES (1<<(VTLB_SHIFT-5))
  89
  90 #define KVM_VPD_BASE   (KVM_VTLB_BASE+KVM_VTLB_BLOCK_SIZE)
  91 #define KVM_VPD_OFS    (KVM_VTLB_OFS+KVM_VTLB_BLOCK_SIZE)
  92 #define KVM_VPD_BLOCK_SIZE   (2UL<<20)
  93 #define VPD_SHIFT       16
  94 #define VPD_SIZE        (1UL<<VPD_SHIFT)
  95
  96 #define KVM_VCPU_BASE   (KVM_VPD_BASE+KVM_VPD_BLOCK_SIZE)
  97 #define KVM_VCPU_OFS    (KVM_VPD_OFS+KVM_VPD_BLOCK_SIZE)
  98 #define KVM_VCPU_BLOCK_SIZE   (2UL<<20)
  99 #define VCPU_SHIFT 18
 100 #define VCPU_SIZE (1UL<<VCPU_SHIFT)
 101 #define MAX_VCPU_NUM KVM_VCPU_BLOCK_SIZE/VCPU_SIZE
 102
 103 #define KVM_VM_BASE     (KVM_VCPU_BASE+KVM_VCPU_BLOCK_SIZE)
 104 #define KVM_VM_OFS      (KVM_VCPU_OFS+KVM_VCPU_BLOCK_SIZE)
 105 #define KVM_VM_BLOCK_SIZE     (1UL<<19)
 106
 107 #define KVM_MEM_DIRTY_LOG_BASE (KVM_VM_BASE+KVM_VM_BLOCK_SIZE)
 108 #define KVM_MEM_DIRTY_LOG_OFS  (KVM_VM_OFS+KVM_VM_BLOCK_SIZE)
 109 #define KVM_MEM_DIRTY_LOG_SIZE (1UL<<19)
 110
 111 /* Get vpd, vhpt, tlb, vcpu, base*/
 112 #define VPD_ADDR(n) (KVM_VPD_BASE+n*VPD_SIZE)
 113 #define VHPT_ADDR(n) (KVM_VHPT_BASE+n*VHPT_SIZE)
 114 #define VTLB_ADDR(n) (KVM_VTLB_BASE+n*VTLB_SIZE)
 115 #define VCPU_ADDR(n) (KVM_VCPU_BASE+n*VCPU_SIZE)
 116
 117 /*IO section definitions*/
 118 #define IOREQ_READ      1
 119 #define IOREQ_WRITE     0
 120
 121 #define STATE_IOREQ_NONE        0
 122 #define STATE_IOREQ_READY       1
 123 #define STATE_IOREQ_INPROCESS   2
 124 #define STATE_IORESP_READY      3
 125
 126 /*Guest Physical address layout.*/
 127 #define GPFN_MEM        (0UL << 60) /* Guest pfn is normal mem */
 128 #define GPFN_FRAME_BUFFER   (1UL << 60) /* VGA framebuffer */
 129 #define GPFN_LOW_MMIO       (2UL << 60) /* Low MMIO range */
 130 #define GPFN_PIB        (3UL << 60) /* PIB base */
 131 #define GPFN_IOSAPIC        (4UL << 60) /* IOSAPIC base */
 132 #define GPFN_LEGACY_IO      (5UL << 60) /* Legacy I/O base */
 133 #define GPFN_GFW        (6UL << 60) /* Guest Firmware */
 134 #define GPFN_HIGH_MMIO      (7UL << 60) /* High MMIO range */
 135
 136 #define GPFN_IO_MASK        (7UL << 60) /* Guest pfn is I/O type */
 137 #define GPFN_INV_MASK       (1UL << 63) /* Guest pfn is invalid */
 138 #define INVALID_MFN       (~0UL)
 139 #define MEM_G   (1UL << 30)
 140 #define MEM_M   (1UL << 20)
 141 #define MMIO_START       (3 * MEM_G)
 142 #define MMIO_SIZE        (512 * MEM_M)
 143 #define VGA_IO_START     0xA0000UL
 144 #define VGA_IO_SIZE      0x20000
 145 #define LEGACY_IO_START  (MMIO_START + MMIO_SIZE)
 146 #define LEGACY_IO_SIZE   (64 * MEM_M)
 147 #define IO_SAPIC_START   0xfec00000UL
 148 #define IO_SAPIC_SIZE    0x100000
 149 #define PIB_START 0xfee00000UL
 150 #define PIB_SIZE 0x200000
 151 #define GFW_START        (4 * MEM_G - 16 * MEM_M)
 152 #define GFW_SIZE         (16 * MEM_M)
 153
 154 /*Deliver mode, defined for ioapic.c*/
 155 #define dest_Fixed IOSAPIC_FIXED
 156 #define dest_LowestPrio IOSAPIC_LOWEST_PRIORITY
 157
 158 #define NMI_VECTOR                      2
 159 #define ExtINT_VECTOR                   0
 160 #define NULL_VECTOR                     (-1)
 161 #define IA64_SPURIOUS_INT_VECTOR        0x0f
 162
 163 #define VCPU_LID(v) (((u64)(v)->vcpu_id) << 24)
 164
 165 /*
 166  *Delivery mode
 167  */
 168 #define SAPIC_DELIV_SHIFT      8
 169 #define SAPIC_FIXED            0x0
 170 #define SAPIC_LOWEST_PRIORITY  0x1
 171 #define SAPIC_PMI              0x2
 172 #define SAPIC_NMI              0x4
 173 #define SAPIC_INIT             0x5
 174 #define SAPIC_EXTINT           0x7
 175
 176 /*
 177  * vcpu->requests bit members for arch
 178  */
 179 #define KVM_REQ_PTC_G           32
 180 #define KVM_REQ_RESUME          33
 181
 182 #define KVM_PAGES_PER_HPAGE     1
 183
 184 struct kvm;
 185 struct kvm_vcpu;
 186 struct kvm_guest_debug{
 187 };
 188
 189 struct kvm_mmio_req {
 190         uint64_t addr;          /*  physical address            */
 191         uint64_t size;          /*  size in bytes               */
 192         uint64_t data;          /*  data (or paddr of data)     */
 193         uint8_t state:4;
 194         uint8_t dir:1;          /*  1=read, 0=write             */
 195 };
 196
 197 /*Pal data struct */
 198 struct kvm_pal_call{
 199         /*In area*/
 200         uint64_t gr28;
 201         uint64_t gr29;
 202         uint64_t gr30;
 203         uint64_t gr31;
 204         /*Out area*/
 205         struct ia64_pal_retval ret;
 206 };
 207
 208 /* Sal data structure */
 209 struct kvm_sal_call{
 210         /*In area*/
 211         uint64_t in0;
 212         uint64_t in1;
 213         uint64_t in2;
 214         uint64_t in3;
 215         uint64_t in4;
 216         uint64_t in5;
 217         uint64_t in6;
 218         uint64_t in7;
 219         struct sal_ret_values ret;
 220 };
 221
 222 /*Guest change rr6*/
 223 struct kvm_switch_rr6 {
 224         uint64_t old_rr;
 225         uint64_t new_rr;
 226 };
 227
 228 union ia64_ipi_a{
 229         unsigned long val;
 230         struct {
 231                 unsigned long rv  : 3;
 232                 unsigned long ir  : 1;
 233                 unsigned long eid : 8;
 234                 unsigned long id  : 8;
 235                 unsigned long ib_base : 44;
 236         };
 237 };
 238
 239 union ia64_ipi_d {
 240         unsigned long val;
 241         struct {
 242                 unsigned long vector : 8;
 243                 unsigned long dm  : 3;
 244                 unsigned long ig  : 53;
 245         };
 246 };
 247
 248 /*ipi check exit data*/
 249 struct kvm_ipi_data{
 250         union ia64_ipi_a addr;
 251         union ia64_ipi_d data;
 252 };
 253
 254 /*global purge data*/
 255 struct kvm_ptc_g {
 256         unsigned long vaddr;
 257         unsigned long rr;
 258         unsigned long ps;
 259         struct kvm_vcpu *vcpu;
 260 };
 261
 262 /*Exit control data */
 263 struct exit_ctl_data{
 264         uint32_t exit_reason;
 265         uint32_t vm_status;
 266         union {
 267                 struct kvm_mmio_req     ioreq;
 268                 struct kvm_pal_call     pal_data;
 269                 struct kvm_sal_call     sal_data;
 270                 struct kvm_switch_rr6   rr_data;
 271                 struct kvm_ipi_data     ipi_data;
 272                 struct kvm_ptc_g        ptc_g_data;
 273         } u;
 274 };
 275
 276 union pte_flags {
 277         unsigned long val;
 278         struct {
 279                 unsigned long p    :  1; /*0      */
 280                 unsigned long      :  1; /* 1     */
 281                 unsigned long ma   :  3; /* 2-4   */
 282                 unsigned long a    :  1; /* 5     */
 283                 unsigned long d    :  1; /* 6     */
 284                 unsigned long pl   :  2; /* 7-8   */
 285                 unsigned long ar   :  3; /* 9-11  */
 286                 unsigned long ppn  : 38; /* 12-49 */
 287                 unsigned long      :  2; /* 50-51 */
 288                 unsigned long ed   :  1; /* 52    */
 289         };
 290 };
 291
 292 union ia64_pta {
 293         unsigned long val;
 294         struct {
 295                 unsigned long ve : 1;
 296                 unsigned long reserved0 : 1;
 297                 unsigned long size : 6;
 298                 unsigned long vf : 1;
 299                 unsigned long reserved1 : 6;
 300                 unsigned long base : 49;
 301         };
 302 };
 303
 304 struct thash_cb {
 305         /* THASH base information */
 306         struct thash_data       *hash; /* hash table pointer */
 307         union ia64_pta          pta;
 308         int           num;
 309 };
 310
 311 struct kvm_vcpu_stat {
 312 };
 313
 314 struct kvm_vcpu_arch {
 315         int launched;
 316         int last_exit;
 317         int last_run_cpu;
 318         int vmm_tr_slot;
 319         int vm_tr_slot;
 320
 321 #define KVM_MP_STATE_RUNNABLE          0
 322 #define KVM_MP_STATE_UNINITIALIZED     1
 323 #define KVM_MP_STATE_INIT_RECEIVED     2
 324 #define KVM_MP_STATE_HALTED            3
 325         int mp_state;
 326
 327 #define MAX_PTC_G_NUM                   3
 328         int ptc_g_count;
 329         struct kvm_ptc_g ptc_g_data[MAX_PTC_G_NUM];
 330
 331         /*halt timer to wake up sleepy vcpus*/
 332         struct hrtimer hlt_timer;
 333         long ht_active;
 334
 335         struct kvm_lapic *apic;    /* kernel irqchip context */
 336         struct vpd *vpd;
 337
 338         /* Exit data for vmm_transition*/
 339         struct exit_ctl_data exit_data;
 340
 341         cpumask_t cache_coherent_map;
 342
 343         unsigned long vmm_rr;
 344         unsigned long host_rr6;
 345         unsigned long psbits[8];
 346         unsigned long cr_iipa;
 347         unsigned long cr_isr;
 348         unsigned long vsa_base;
 349         unsigned long dirty_log_lock_pa;
 350         unsigned long __gp;
 351         /* TR and TC.  */
 352         struct thash_data itrs[NITRS];
 353         struct thash_data dtrs[NDTRS];
 354         /* Bit is set if there is a tr/tc for the region.  */
 355         unsigned char itr_regions;
 356         unsigned char dtr_regions;
 357         unsigned char tc_regions;
 358         /* purge all */
 359         unsigned long ptce_base;
 360         unsigned long ptce_count[2];
 361         unsigned long ptce_stride[2];
 362         /* itc/itm */
 363         unsigned long last_itc;
 364         long itc_offset;
 365         unsigned long itc_check;
 366         unsigned long timer_check;
 367         unsigned long timer_pending;
 368
 369         unsigned long vrr[8];
 370         unsigned long ibr[8];
 371         unsigned long dbr[8];
 372         unsigned long insvc[4];         /* Interrupt in service.  */
 373         unsigned long xtp;
 374
 375         unsigned long metaphysical_rr0; /* from kvm_arch (so is pinned) */
 376         unsigned long metaphysical_rr4; /* from kvm_arch (so is pinned) */
 377         unsigned long metaphysical_saved_rr0; /* from kvm_arch          */
 378         unsigned long metaphysical_saved_rr4; /* from kvm_arch          */
 379         unsigned long fp_psr;       /*used for lazy float register */
 380         unsigned long saved_gp;
 381         /*for phycial  emulation */
 382         int mode_flags;
 383         struct thash_cb vtlb;
 384         struct thash_cb vhpt;
 385         char irq_check;
 386         char irq_new_pending;
 387
 388         unsigned long opcode;
 389         unsigned long cause;
 390         union context host;
 391         union context guest;
 392 };
 393
 394 struct kvm_vm_stat {
 395         u64 remote_tlb_flush;
 396 };
 397
 398 struct kvm_sal_data {
 399         unsigned long boot_ip;
 400         unsigned long boot_gp;
 401 };
 402
 403 struct kvm_arch {
 404         unsigned long   vm_base;
 405         unsigned long   metaphysical_rr0;
 406         unsigned long   metaphysical_rr4;
 407         unsigned long   vmm_init_rr;
 408         unsigned long   vhpt_base;
 409         unsigned long   vtlb_base;
 410         unsigned long   vpd_base;
 411         spinlock_t dirty_log_lock;
 412         struct kvm_ioapic *vioapic;
 413         struct kvm_vm_stat stat;
 414         struct kvm_sal_data rdv_sal_data;
 415 };
 416
 417 union cpuid3_t {
 418         u64 value;
 419         struct {
 420                 u64 number : 8;
 421                 u64 revision : 8;
 422                 u64 model : 8;
 423                 u64 family : 8;
 424                 u64 archrev : 8;
 425                 u64 rv : 24;
 426         };
 427 };
 428
 429 struct kvm_pt_regs {
 430         /* The following registers are saved by SAVE_MIN: */
 431         unsigned long b6;  /* scratch */
 432         unsigned long b7;  /* scratch */
 433
 434         unsigned long ar_csd; /* used by cmp8xchg16 (scratch) */
 435         unsigned long ar_ssd; /* reserved for future use (scratch) */
 436
 437         unsigned long r8;  /* scratch (return value register 0) */
 438         unsigned long r9;  /* scratch (return value register 1) */
 439         unsigned long r10; /* scratch (return value register 2) */
 440         unsigned long r11; /* scratch (return value register 3) */
 441
 442         unsigned long cr_ipsr; /* interrupted task's psr */
 443         unsigned long cr_iip;  /* interrupted task's instruction pointer */
 444         unsigned long cr_ifs;  /* interrupted task's function state */
 445
 446         unsigned long ar_unat; /* interrupted task's NaT register (preserved) */
 447         unsigned long ar_pfs;  /* prev function state  */
 448         unsigned long ar_rsc;  /* RSE configuration */
 449         /* The following two are valid only if cr_ipsr.cpl > 0: */
 450         unsigned long ar_rnat;  /* RSE NaT */
 451         unsigned long ar_bspstore; /* RSE bspstore */
 452
 453         unsigned long pr;  /* 64 predicate registers (1 bit each) */
 454         unsigned long b0;  /* return pointer (bp) */
 455         unsigned long loadrs;  /* size of dirty partition << 16 */
 456
 457         unsigned long r1;  /* the gp pointer */
 458         unsigned long r12; /* interrupted task's memory stack pointer */
 459         unsigned long r13; /* thread pointer */
 460
 461         unsigned long ar_fpsr;  /* floating point status (preserved) */
 462         unsigned long r15;  /* scratch */
 463
 464         /* The remaining registers are NOT saved for system calls.  */
 465         unsigned long r14;  /* scratch */
 466         unsigned long r2;  /* scratch */
 467         unsigned long r3;  /* scratch */
 468         unsigned long r16;  /* scratch */
 469         unsigned long r17;  /* scratch */
 470         unsigned long r18;  /* scratch */
 471         unsigned long r19;  /* scratch */
 472         unsigned long r20;  /* scratch */
 473         unsigned long r21;  /* scratch */
 474         unsigned long r22;  /* scratch */
 475         unsigned long r23;  /* scratch */
 476         unsigned long r24;  /* scratch */
 477         unsigned long r25;  /* scratch */
 478         unsigned long r26;  /* scratch */
 479         unsigned long r27;  /* scratch */
 480         unsigned long r28;  /* scratch */
 481         unsigned long r29;  /* scratch */
 482         unsigned long r30;  /* scratch */
 483         unsigned long r31;  /* scratch */
 484         unsigned long ar_ccv;  /* compare/exchange value (scratch) */
 485
 486         /*
 487          * Floating point registers that the kernel considers scratch:
 488          */
 489         struct ia64_fpreg f6;  /* scratch */
 490         struct ia64_fpreg f7;  /* scratch */
 491         struct ia64_fpreg f8;  /* scratch */
 492         struct ia64_fpreg f9;  /* scratch */
 493         struct ia64_fpreg f10;  /* scratch */
 494         struct ia64_fpreg f11;  /* scratch */
 495
 496         unsigned long r4;  /* preserved */
 497         unsigned long r5;  /* preserved */
 498         unsigned long r6;  /* preserved */
 499         unsigned long r7;  /* preserved */
 500         unsigned long eml_unat;    /* used for emulating instruction */
 501         unsigned long pad0;     /* alignment pad */
 502 };
 503
 504 static inline struct kvm_pt_regs *vcpu_regs(struct kvm_vcpu *v)
 505 {
 506         return (struct kvm_pt_regs *) ((unsigned long) v + IA64_STK_OFFSET) - 1;
 507 }
 508
 509 typedef int kvm_vmm_entry(void);
 510 typedef void kvm_tramp_entry(union context *host, union context *guest);
 511
 512 struct kvm_vmm_info{
 513         struct module   *module;
 514         kvm_vmm_entry   *vmm_entry;
 515         kvm_tramp_entry *tramp_entry;
 516         unsigned long   vmm_ivt;
 517 };
 518
 519 int kvm_highest_pending_irq(struct kvm_vcpu *vcpu);
 520 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
 521 int kvm_pal_emul(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
 522 void kvm_sal_emul(struct kvm_vcpu *vcpu);
 523
 524 #endif