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