arch/powerpc/include/asm/kvm_host.h

   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
  16  *
  17  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
  18  */
  19
  20 #ifndef __POWERPC_KVM_HOST_H__
  21 #define __POWERPC_KVM_HOST_H__
  22
  23 #include <linux/mutex.h>
  24 #include <linux/hrtimer.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/types.h>
  27 #include <linux/kvm_types.h>
  28 #include <linux/threads.h>
  29 #include <linux/spinlock.h>
  30 #include <linux/kvm_para.h>
  31 #include <linux/list.h>
  32 #include <linux/atomic.h>
  33 #include <asm/kvm_asm.h>
  34 #include <asm/processor.h>
  35
  36 #define KVM_MAX_VCPUS           NR_CPUS
  37 #define KVM_MAX_VCORES          NR_CPUS
  38 #define KVM_MEMORY_SLOTS 32
  39 /* memory slots that does not exposed to userspace */
  40 #define KVM_PRIVATE_MEM_SLOTS 4
  41 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
  42
  43 #ifdef CONFIG_KVM_MMIO
  44 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1
  45 #endif
  46
  47 /* We don't currently support large pages. */
  48 #define KVM_HPAGE_GFN_SHIFT(x)  0
  49 #define KVM_NR_PAGE_SIZES       1
  50 #define KVM_PAGES_PER_HPAGE(x)  (1UL<<31)
  51
  52 #define HPTEG_CACHE_NUM                 (1 << 15)
  53 #define HPTEG_HASH_BITS_PTE             13
  54 #define HPTEG_HASH_BITS_PTE_LONG        12
  55 #define HPTEG_HASH_BITS_VPTE            13
  56 #define HPTEG_HASH_BITS_VPTE_LONG       5
  57 #define HPTEG_HASH_NUM_PTE              (1 << HPTEG_HASH_BITS_PTE)
  58 #define HPTEG_HASH_NUM_PTE_LONG         (1 << HPTEG_HASH_BITS_PTE_LONG)
  59 #define HPTEG_HASH_NUM_VPTE             (1 << HPTEG_HASH_BITS_VPTE)
  60 #define HPTEG_HASH_NUM_VPTE_LONG        (1 << HPTEG_HASH_BITS_VPTE_LONG)
  61
  62 /* Physical Address Mask - allowed range of real mode RAM access */
  63 #define KVM_PAM                 0x0fffffffffffffffULL
  64
  65 struct kvm;
  66 struct kvm_run;
  67 struct kvm_vcpu;
  68
  69 struct lppaca;
  70 struct slb_shadow;
  71 struct dtl;
  72
  73 struct kvm_vm_stat {
  74         u32 remote_tlb_flush;
  75 };
  76
  77 struct kvm_vcpu_stat {
  78         u32 sum_exits;
  79         u32 mmio_exits;
  80         u32 dcr_exits;
  81         u32 signal_exits;
  82         u32 light_exits;
  83         /* Account for special types of light exits: */
  84         u32 itlb_real_miss_exits;
  85         u32 itlb_virt_miss_exits;
  86         u32 dtlb_real_miss_exits;
  87         u32 dtlb_virt_miss_exits;
  88         u32 syscall_exits;
  89         u32 isi_exits;
  90         u32 dsi_exits;
  91         u32 emulated_inst_exits;
  92         u32 dec_exits;
  93         u32 ext_intr_exits;
  94         u32 halt_wakeup;
  95 #ifdef CONFIG_PPC_BOOK3S
  96         u32 pf_storage;
  97         u32 pf_instruc;
  98         u32 sp_storage;
  99         u32 sp_instruc;
 100         u32 queue_intr;
 101         u32 ld;
 102         u32 ld_slow;
 103         u32 st;
 104         u32 st_slow;
 105 #endif
 106 };
 107
 108 enum kvm_exit_types {
 109         MMIO_EXITS,
 110         DCR_EXITS,
 111         SIGNAL_EXITS,
 112         ITLB_REAL_MISS_EXITS,
 113         ITLB_VIRT_MISS_EXITS,
 114         DTLB_REAL_MISS_EXITS,
 115         DTLB_VIRT_MISS_EXITS,
 116         SYSCALL_EXITS,
 117         ISI_EXITS,
 118         DSI_EXITS,
 119         EMULATED_INST_EXITS,
 120         EMULATED_MTMSRWE_EXITS,
 121         EMULATED_WRTEE_EXITS,
 122         EMULATED_MTSPR_EXITS,
 123         EMULATED_MFSPR_EXITS,
 124         EMULATED_MTMSR_EXITS,
 125         EMULATED_MFMSR_EXITS,
 126         EMULATED_TLBSX_EXITS,
 127         EMULATED_TLBWE_EXITS,
 128         EMULATED_RFI_EXITS,
 129         DEC_EXITS,
 130         EXT_INTR_EXITS,
 131         HALT_WAKEUP,
 132         USR_PR_INST,
 133         FP_UNAVAIL,
 134         DEBUG_EXITS,
 135         TIMEINGUEST,
 136         __NUMBER_OF_KVM_EXIT_TYPES
 137 };
 138
 139 /* allow access to big endian 32bit upper/lower parts and 64bit var */
 140 struct kvmppc_exit_timing {
 141         union {
 142                 u64 tv64;
 143                 struct {
 144                         u32 tbu, tbl;
 145                 } tv32;
 146         };
 147 };
 148
 149 struct kvmppc_pginfo {
 150         unsigned long pfn;
 151         atomic_t refcnt;
 152 };
 153
 154 struct kvmppc_spapr_tce_table {
 155         struct list_head list;
 156         struct kvm *kvm;
 157         u64 liobn;
 158         u32 window_size;
 159         struct page *pages[0];
 160 };
 161
 162 struct kvmppc_rma_info {
 163         void            *base_virt;
 164         unsigned long    base_pfn;
 165         unsigned long    npages;
 166         struct list_head list;
 167         atomic_t         use_count;
 168 };
 169
 170 /*
 171  * The reverse mapping array has one entry for each HPTE,
 172  * which stores the guest's view of the second word of the HPTE
 173  * (including the guest physical address of the mapping),
 174  * plus forward and backward pointers in a doubly-linked ring
 175  * of HPTEs that map the same host page.  The pointers in this
 176  * ring are 32-bit HPTE indexes, to save space.
 177  */
 178 struct revmap_entry {
 179         unsigned long guest_rpte;
 180         unsigned int forw, back;
 181 };
 182
 183 /*
 184  * We use the top bit of each memslot->rmap entry as a lock bit,
 185  * and bit 32 as a present flag.  The bottom 32 bits are the
 186  * index in the guest HPT of a HPTE that points to the page.
 187  */
 188 #define KVMPPC_RMAP_LOCK_BIT    63
 189 #define KVMPPC_RMAP_REF_BIT     33
 190 #define KVMPPC_RMAP_REFERENCED  (1ul << KVMPPC_RMAP_REF_BIT)
 191 #define KVMPPC_RMAP_PRESENT     0x100000000ul
 192 #define KVMPPC_RMAP_INDEX       0xfffffffful
 193
 194 /* Low-order bits in kvm->arch.slot_phys[][] */
 195 #define KVMPPC_PAGE_ORDER_MASK  0x1f
 196 #define KVMPPC_PAGE_NO_CACHE    HPTE_R_I        /* 0x20 */
 197 #define KVMPPC_PAGE_WRITETHRU   HPTE_R_W        /* 0x40 */
 198 #define KVMPPC_GOT_PAGE         0x80
 199
 200 struct kvm_arch {
 201 #ifdef CONFIG_KVM_BOOK3S_64_HV
 202         unsigned long hpt_virt;
 203         struct revmap_entry *revmap;
 204         unsigned int lpid;
 205         unsigned int host_lpid;
 206         unsigned long host_lpcr;
 207         unsigned long sdr1;
 208         unsigned long host_sdr1;
 209         int tlbie_lock;
 210         unsigned long lpcr;
 211         unsigned long rmor;
 212         struct kvmppc_rma_info *rma;
 213         int rma_setup_done;
 214         struct list_head spapr_tce_tables;
 215         spinlock_t slot_phys_lock;
 216         unsigned long *slot_phys[KVM_MEM_SLOTS_NUM];
 217         int slot_npages[KVM_MEM_SLOTS_NUM];
 218         unsigned short last_vcpu[NR_CPUS];
 219         struct kvmppc_vcore *vcores[KVM_MAX_VCORES];
 220 #endif /* CONFIG_KVM_BOOK3S_64_HV */
 221 };
 222
 223 /*
 224  * Struct for a virtual core.
 225  * Note: entry_exit_count combines an entry count in the bottom 8 bits
 226  * and an exit count in the next 8 bits.  This is so that we can
 227  * atomically increment the entry count iff the exit count is 0
 228  * without taking the lock.
 229  */
 230 struct kvmppc_vcore {
 231         int n_runnable;
 232         int n_busy;
 233         int num_threads;
 234         int entry_exit_count;
 235         int n_woken;
 236         int nap_count;
 237         int napping_threads;
 238         u16 pcpu;
 239         u8 vcore_state;
 240         u8 in_guest;
 241         struct list_head runnable_threads;
 242         spinlock_t lock;
 243         wait_queue_head_t wq;
 244 };
 245
 246 #define VCORE_ENTRY_COUNT(vc)   ((vc)->entry_exit_count & 0xff)
 247 #define VCORE_EXIT_COUNT(vc)    ((vc)->entry_exit_count >> 8)
 248
 249 /* Values for vcore_state */
 250 #define VCORE_INACTIVE  0
 251 #define VCORE_RUNNING   1
 252 #define VCORE_EXITING   2
 253 #define VCORE_SLEEPING  3
 254
 255 struct kvmppc_pte {
 256         ulong eaddr;
 257         u64 vpage;
 258         ulong raddr;
 259         bool may_read           : 1;
 260         bool may_write          : 1;
 261         bool may_execute        : 1;
 262 };
 263
 264 struct kvmppc_mmu {
 265         /* book3s_64 only */
 266         void (*slbmte)(struct kvm_vcpu *vcpu, u64 rb, u64 rs);
 267         u64  (*slbmfee)(struct kvm_vcpu *vcpu, u64 slb_nr);
 268         u64  (*slbmfev)(struct kvm_vcpu *vcpu, u64 slb_nr);
 269         void (*slbie)(struct kvm_vcpu *vcpu, u64 slb_nr);
 270         void (*slbia)(struct kvm_vcpu *vcpu);
 271         /* book3s */
 272         void (*mtsrin)(struct kvm_vcpu *vcpu, u32 srnum, ulong value);
 273         u32  (*mfsrin)(struct kvm_vcpu *vcpu, u32 srnum);
 274         int  (*xlate)(struct kvm_vcpu *vcpu, gva_t eaddr, struct kvmppc_pte *pte, bool data);
 275         void (*reset_msr)(struct kvm_vcpu *vcpu);
 276         void (*tlbie)(struct kvm_vcpu *vcpu, ulong addr, bool large);
 277         int  (*esid_to_vsid)(struct kvm_vcpu *vcpu, ulong esid, u64 *vsid);
 278         u64  (*ea_to_vp)(struct kvm_vcpu *vcpu, gva_t eaddr, bool data);
 279         bool (*is_dcbz32)(struct kvm_vcpu *vcpu);
 280 };
 281
 282 struct kvmppc_slb {
 283         u64 esid;
 284         u64 vsid;
 285         u64 orige;
 286         u64 origv;
 287         bool valid      : 1;
 288         bool Ks         : 1;
 289         bool Kp         : 1;
 290         bool nx         : 1;
 291         bool large      : 1;    /* PTEs are 16MB */
 292         bool tb         : 1;    /* 1TB segment */
 293         bool class      : 1;
 294 };
 295
 296 struct kvm_vcpu_arch {
 297         ulong host_stack;
 298         u32 host_pid;
 299 #ifdef CONFIG_PPC_BOOK3S
 300         struct kvmppc_slb slb[64];
 301         int slb_max;            /* 1 + index of last valid entry in slb[] */
 302         int slb_nr;             /* total number of entries in SLB */
 303         struct kvmppc_mmu mmu;
 304 #endif
 305
 306         ulong gpr[32];
 307
 308         u64 fpr[32];
 309         u64 fpscr;
 310
 311 #ifdef CONFIG_SPE
 312         ulong evr[32];
 313         ulong spefscr;
 314         ulong host_spefscr;
 315         u64 acc;
 316 #endif
 317 #ifdef CONFIG_ALTIVEC
 318         vector128 vr[32];
 319         vector128 vscr;
 320 #endif
 321
 322 #ifdef CONFIG_VSX
 323         u64 vsr[64];
 324 #endif
 325
 326 #ifdef CONFIG_PPC_BOOK3S
 327         /* For Gekko paired singles */
 328         u32 qpr[32];
 329 #endif
 330
 331         ulong pc;
 332         ulong ctr;
 333         ulong lr;
 334
 335         ulong xer;
 336         u32 cr;
 337
 338 #ifdef CONFIG_PPC_BOOK3S
 339         ulong hflags;
 340         ulong guest_owned_ext;
 341         ulong purr;
 342         ulong spurr;
 343         ulong dscr;
 344         ulong amr;
 345         ulong uamor;
 346         u32 ctrl;
 347         ulong dabr;
 348 #endif
 349         u32 vrsave; /* also USPRG0 */
 350         u32 mmucr;
 351         ulong shadow_msr;
 352         ulong csrr0;
 353         ulong csrr1;
 354         ulong dsrr0;
 355         ulong dsrr1;
 356         ulong mcsrr0;
 357         ulong mcsrr1;
 358         ulong mcsr;
 359         u32 dec;
 360         u32 decar;
 361         u32 tbl;
 362         u32 tbu;
 363         u32 tcr;
 364         ulong tsr; /* we need to perform set/clr_bits() which requires ulong */
 365         u32 ivor[64];
 366         ulong ivpr;
 367         u32 pvr;
 368
 369         u32 shadow_pid;
 370         u32 shadow_pid1;
 371         u32 pid;
 372         u32 swap_pid;
 373
 374         u32 ccr0;
 375         u32 ccr1;
 376         u32 dbcr0;
 377         u32 dbcr1;
 378         u32 dbsr;
 379
 380         u64 mmcr[3];
 381         u32 pmc[8];
 382
 383 #ifdef CONFIG_KVM_EXIT_TIMING
 384         struct mutex exit_timing_lock;
 385         struct kvmppc_exit_timing timing_exit;
 386         struct kvmppc_exit_timing timing_last_enter;
 387         u32 last_exit_type;
 388         u32 timing_count_type[__NUMBER_OF_KVM_EXIT_TYPES];
 389         u64 timing_sum_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 390         u64 timing_sum_quad_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 391         u64 timing_min_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 392         u64 timing_max_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 393         u64 timing_last_exit;
 394         struct dentry *debugfs_exit_timing;
 395 #endif
 396
 397 #ifdef CONFIG_PPC_BOOK3S
 398         ulong fault_dar;
 399         u32 fault_dsisr;
 400 #endif
 401
 402 #ifdef CONFIG_BOOKE
 403         ulong fault_dear;
 404         ulong fault_esr;
 405         ulong queued_dear;
 406         ulong queued_esr;
 407 #endif
 408         gpa_t paddr_accessed;
 409
 410         u8 io_gpr; /* GPR used as IO source/target */
 411         u8 mmio_is_bigendian;
 412         u8 mmio_sign_extend;
 413         u8 dcr_needed;
 414         u8 dcr_is_write;
 415         u8 osi_needed;
 416         u8 osi_enabled;
 417         u8 papr_enabled;
 418         u8 sane;
 419         u8 cpu_type;
 420         u8 hcall_needed;
 421
 422         u32 cpr0_cfgaddr; /* holds the last set cpr0_cfgaddr */
 423
 424         struct hrtimer dec_timer;
 425         struct tasklet_struct tasklet;
 426         u64 dec_jiffies;
 427         u64 dec_expires;
 428         unsigned long pending_exceptions;
 429         u16 last_cpu;
 430         u8 ceded;
 431         u8 prodded;
 432         u32 last_inst;
 433
 434         struct lppaca *vpa;
 435         struct slb_shadow *slb_shadow;
 436         struct dtl *dtl;
 437         struct dtl *dtl_end;
 438
 439         wait_queue_head_t *wqp;
 440         struct kvmppc_vcore *vcore;
 441         int ret;
 442         int trap;
 443         int state;
 444         int ptid;
 445         bool timer_running;
 446         wait_queue_head_t cpu_run;
 447
 448         struct kvm_vcpu_arch_shared *shared;
 449         unsigned long magic_page_pa; /* phys addr to map the magic page to */
 450         unsigned long magic_page_ea; /* effect. addr to map the magic page to */
 451
 452 #ifdef CONFIG_KVM_BOOK3S_64_HV
 453         struct kvm_vcpu_arch_shared shregs;
 454
 455         struct list_head run_list;
 456         struct task_struct *run_task;
 457         struct kvm_run *kvm_run;
 458 #endif
 459 };
 460
 461 /* Values for vcpu->arch.state */
 462 #define KVMPPC_VCPU_STOPPED             0
 463 #define KVMPPC_VCPU_BUSY_IN_HOST        1
 464 #define KVMPPC_VCPU_RUNNABLE            2
 465
 466 #endif /* __POWERPC_KVM_HOST_H__ */