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  */
 175 struct revmap_entry {
 176         unsigned long guest_rpte;
 177 };
 178
 179 /* Low-order bits in kvm->arch.slot_phys[][] */
 180 #define KVMPPC_PAGE_ORDER_MASK  0x1f
 181 #define KVMPPC_PAGE_NO_CACHE    HPTE_R_I        /* 0x20 */
 182 #define KVMPPC_PAGE_WRITETHRU   HPTE_R_W        /* 0x40 */
 183 #define KVMPPC_GOT_PAGE         0x80
 184
 185 struct kvm_arch {
 186 #ifdef CONFIG_KVM_BOOK3S_64_HV
 187         unsigned long hpt_virt;
 188         struct revmap_entry *revmap;
 189         unsigned int lpid;
 190         unsigned int host_lpid;
 191         unsigned long host_lpcr;
 192         unsigned long sdr1;
 193         unsigned long host_sdr1;
 194         int tlbie_lock;
 195         unsigned long lpcr;
 196         unsigned long rmor;
 197         struct kvmppc_rma_info *rma;
 198         int rma_setup_done;
 199         struct list_head spapr_tce_tables;
 200         spinlock_t slot_phys_lock;
 201         unsigned long *slot_phys[KVM_MEM_SLOTS_NUM];
 202         int slot_npages[KVM_MEM_SLOTS_NUM];
 203         unsigned short last_vcpu[NR_CPUS];
 204         struct kvmppc_vcore *vcores[KVM_MAX_VCORES];
 205 #endif /* CONFIG_KVM_BOOK3S_64_HV */
 206 };
 207
 208 /*
 209  * Struct for a virtual core.
 210  * Note: entry_exit_count combines an entry count in the bottom 8 bits
 211  * and an exit count in the next 8 bits.  This is so that we can
 212  * atomically increment the entry count iff the exit count is 0
 213  * without taking the lock.
 214  */
 215 struct kvmppc_vcore {
 216         int n_runnable;
 217         int n_busy;
 218         int num_threads;
 219         int entry_exit_count;
 220         int n_woken;
 221         int nap_count;
 222         int napping_threads;
 223         u16 pcpu;
 224         u8 vcore_state;
 225         u8 in_guest;
 226         struct list_head runnable_threads;
 227         spinlock_t lock;
 228         wait_queue_head_t wq;
 229 };
 230
 231 #define VCORE_ENTRY_COUNT(vc)   ((vc)->entry_exit_count & 0xff)
 232 #define VCORE_EXIT_COUNT(vc)    ((vc)->entry_exit_count >> 8)
 233
 234 /* Values for vcore_state */
 235 #define VCORE_INACTIVE  0
 236 #define VCORE_RUNNING   1
 237 #define VCORE_EXITING   2
 238 #define VCORE_SLEEPING  3
 239
 240 struct kvmppc_pte {
 241         ulong eaddr;
 242         u64 vpage;
 243         ulong raddr;
 244         bool may_read           : 1;
 245         bool may_write          : 1;
 246         bool may_execute        : 1;
 247 };
 248
 249 struct kvmppc_mmu {
 250         /* book3s_64 only */
 251         void (*slbmte)(struct kvm_vcpu *vcpu, u64 rb, u64 rs);
 252         u64  (*slbmfee)(struct kvm_vcpu *vcpu, u64 slb_nr);
 253         u64  (*slbmfev)(struct kvm_vcpu *vcpu, u64 slb_nr);
 254         void (*slbie)(struct kvm_vcpu *vcpu, u64 slb_nr);
 255         void (*slbia)(struct kvm_vcpu *vcpu);
 256         /* book3s */
 257         void (*mtsrin)(struct kvm_vcpu *vcpu, u32 srnum, ulong value);
 258         u32  (*mfsrin)(struct kvm_vcpu *vcpu, u32 srnum);
 259         int  (*xlate)(struct kvm_vcpu *vcpu, gva_t eaddr, struct kvmppc_pte *pte, bool data);
 260         void (*reset_msr)(struct kvm_vcpu *vcpu);
 261         void (*tlbie)(struct kvm_vcpu *vcpu, ulong addr, bool large);
 262         int  (*esid_to_vsid)(struct kvm_vcpu *vcpu, ulong esid, u64 *vsid);
 263         u64  (*ea_to_vp)(struct kvm_vcpu *vcpu, gva_t eaddr, bool data);
 264         bool (*is_dcbz32)(struct kvm_vcpu *vcpu);
 265 };
 266
 267 struct kvmppc_slb {
 268         u64 esid;
 269         u64 vsid;
 270         u64 orige;
 271         u64 origv;
 272         bool valid      : 1;
 273         bool Ks         : 1;
 274         bool Kp         : 1;
 275         bool nx         : 1;
 276         bool large      : 1;    /* PTEs are 16MB */
 277         bool tb         : 1;    /* 1TB segment */
 278         bool class      : 1;
 279 };
 280
 281 struct kvm_vcpu_arch {
 282         ulong host_stack;
 283         u32 host_pid;
 284 #ifdef CONFIG_PPC_BOOK3S
 285         struct kvmppc_slb slb[64];
 286         int slb_max;            /* 1 + index of last valid entry in slb[] */
 287         int slb_nr;             /* total number of entries in SLB */
 288         struct kvmppc_mmu mmu;
 289 #endif
 290
 291         ulong gpr[32];
 292
 293         u64 fpr[32];
 294         u64 fpscr;
 295
 296 #ifdef CONFIG_SPE
 297         ulong evr[32];
 298         ulong spefscr;
 299         ulong host_spefscr;
 300         u64 acc;
 301 #endif
 302 #ifdef CONFIG_ALTIVEC
 303         vector128 vr[32];
 304         vector128 vscr;
 305 #endif
 306
 307 #ifdef CONFIG_VSX
 308         u64 vsr[64];
 309 #endif
 310
 311 #ifdef CONFIG_PPC_BOOK3S
 312         /* For Gekko paired singles */
 313         u32 qpr[32];
 314 #endif
 315
 316         ulong pc;
 317         ulong ctr;
 318         ulong lr;
 319
 320         ulong xer;
 321         u32 cr;
 322
 323 #ifdef CONFIG_PPC_BOOK3S
 324         ulong hflags;
 325         ulong guest_owned_ext;
 326         ulong purr;
 327         ulong spurr;
 328         ulong dscr;
 329         ulong amr;
 330         ulong uamor;
 331         u32 ctrl;
 332         ulong dabr;
 333 #endif
 334         u32 vrsave; /* also USPRG0 */
 335         u32 mmucr;
 336         ulong shadow_msr;
 337         ulong csrr0;
 338         ulong csrr1;
 339         ulong dsrr0;
 340         ulong dsrr1;
 341         ulong mcsrr0;
 342         ulong mcsrr1;
 343         ulong mcsr;
 344         u32 dec;
 345         u32 decar;
 346         u32 tbl;
 347         u32 tbu;
 348         u32 tcr;
 349         ulong tsr; /* we need to perform set/clr_bits() which requires ulong */
 350         u32 ivor[64];
 351         ulong ivpr;
 352         u32 pvr;
 353
 354         u32 shadow_pid;
 355         u32 shadow_pid1;
 356         u32 pid;
 357         u32 swap_pid;
 358
 359         u32 ccr0;
 360         u32 ccr1;
 361         u32 dbcr0;
 362         u32 dbcr1;
 363         u32 dbsr;
 364
 365         u64 mmcr[3];
 366         u32 pmc[8];
 367
 368 #ifdef CONFIG_KVM_EXIT_TIMING
 369         struct mutex exit_timing_lock;
 370         struct kvmppc_exit_timing timing_exit;
 371         struct kvmppc_exit_timing timing_last_enter;
 372         u32 last_exit_type;
 373         u32 timing_count_type[__NUMBER_OF_KVM_EXIT_TYPES];
 374         u64 timing_sum_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 375         u64 timing_sum_quad_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 376         u64 timing_min_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 377         u64 timing_max_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 378         u64 timing_last_exit;
 379         struct dentry *debugfs_exit_timing;
 380 #endif
 381
 382 #ifdef CONFIG_PPC_BOOK3S
 383         ulong fault_dar;
 384         u32 fault_dsisr;
 385 #endif
 386
 387 #ifdef CONFIG_BOOKE
 388         ulong fault_dear;
 389         ulong fault_esr;
 390         ulong queued_dear;
 391         ulong queued_esr;
 392 #endif
 393         gpa_t paddr_accessed;
 394
 395         u8 io_gpr; /* GPR used as IO source/target */
 396         u8 mmio_is_bigendian;
 397         u8 mmio_sign_extend;
 398         u8 dcr_needed;
 399         u8 dcr_is_write;
 400         u8 osi_needed;
 401         u8 osi_enabled;
 402         u8 papr_enabled;
 403         u8 sane;
 404         u8 cpu_type;
 405         u8 hcall_needed;
 406
 407         u32 cpr0_cfgaddr; /* holds the last set cpr0_cfgaddr */
 408
 409         struct hrtimer dec_timer;
 410         struct tasklet_struct tasklet;
 411         u64 dec_jiffies;
 412         u64 dec_expires;
 413         unsigned long pending_exceptions;
 414         u16 last_cpu;
 415         u8 ceded;
 416         u8 prodded;
 417         u32 last_inst;
 418
 419         struct lppaca *vpa;
 420         struct slb_shadow *slb_shadow;
 421         struct dtl *dtl;
 422         struct dtl *dtl_end;
 423
 424         wait_queue_head_t *wqp;
 425         struct kvmppc_vcore *vcore;
 426         int ret;
 427         int trap;
 428         int state;
 429         int ptid;
 430         bool timer_running;
 431         wait_queue_head_t cpu_run;
 432
 433         struct kvm_vcpu_arch_shared *shared;
 434         unsigned long magic_page_pa; /* phys addr to map the magic page to */
 435         unsigned long magic_page_ea; /* effect. addr to map the magic page to */
 436
 437 #ifdef CONFIG_KVM_BOOK3S_64_HV
 438         struct kvm_vcpu_arch_shared shregs;
 439
 440         struct list_head run_list;
 441         struct task_struct *run_task;
 442         struct kvm_run *kvm_run;
 443 #endif
 444 };
 445
 446 /* Values for vcpu->arch.state */
 447 #define KVMPPC_VCPU_STOPPED             0
 448 #define KVMPPC_VCPU_BUSY_IN_HOST        1
 449 #define KVMPPC_VCPU_RUNNABLE            2
 450
 451 #endif /* __POWERPC_KVM_HOST_H__ */