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 struct kvm_arch {
 170 #ifdef CONFIG_KVM_BOOK3S_64_HV
 171         unsigned long hpt_virt;
 172         unsigned long ram_npages;
 173         unsigned long ram_psize;
 174         unsigned long ram_porder;
 175         struct kvmppc_pginfo *ram_pginfo;
 176         unsigned int lpid;
 177         unsigned int host_lpid;
 178         unsigned long host_lpcr;
 179         unsigned long sdr1;
 180         unsigned long host_sdr1;
 181         int tlbie_lock;
 182         int n_rma_pages;
 183         unsigned long lpcr;
 184         unsigned long rmor;
 185         struct kvmppc_rma_info *rma;
 186         struct list_head spapr_tce_tables;
 187         unsigned short last_vcpu[NR_CPUS];
 188         struct kvmppc_vcore *vcores[KVM_MAX_VCORES];
 189 #endif /* CONFIG_KVM_BOOK3S_64_HV */
 190 };
 191
 192 /*
 193  * Struct for a virtual core.
 194  * Note: entry_exit_count combines an entry count in the bottom 8 bits
 195  * and an exit count in the next 8 bits.  This is so that we can
 196  * atomically increment the entry count iff the exit count is 0
 197  * without taking the lock.
 198  */
 199 struct kvmppc_vcore {
 200         int n_runnable;
 201         int n_blocked;
 202         int num_threads;
 203         int entry_exit_count;
 204         int n_woken;
 205         int nap_count;
 206         u16 pcpu;
 207         u8 vcore_running;
 208         u8 in_guest;
 209         struct list_head runnable_threads;
 210         spinlock_t lock;
 211 };
 212
 213 #define VCORE_ENTRY_COUNT(vc)   ((vc)->entry_exit_count & 0xff)
 214 #define VCORE_EXIT_COUNT(vc)    ((vc)->entry_exit_count >> 8)
 215
 216 struct kvmppc_pte {
 217         ulong eaddr;
 218         u64 vpage;
 219         ulong raddr;
 220         bool may_read           : 1;
 221         bool may_write          : 1;
 222         bool may_execute        : 1;
 223 };
 224
 225 struct kvmppc_mmu {
 226         /* book3s_64 only */
 227         void (*slbmte)(struct kvm_vcpu *vcpu, u64 rb, u64 rs);
 228         u64  (*slbmfee)(struct kvm_vcpu *vcpu, u64 slb_nr);
 229         u64  (*slbmfev)(struct kvm_vcpu *vcpu, u64 slb_nr);
 230         void (*slbie)(struct kvm_vcpu *vcpu, u64 slb_nr);
 231         void (*slbia)(struct kvm_vcpu *vcpu);
 232         /* book3s */
 233         void (*mtsrin)(struct kvm_vcpu *vcpu, u32 srnum, ulong value);
 234         u32  (*mfsrin)(struct kvm_vcpu *vcpu, u32 srnum);
 235         int  (*xlate)(struct kvm_vcpu *vcpu, gva_t eaddr, struct kvmppc_pte *pte, bool data);
 236         void (*reset_msr)(struct kvm_vcpu *vcpu);
 237         void (*tlbie)(struct kvm_vcpu *vcpu, ulong addr, bool large);
 238         int  (*esid_to_vsid)(struct kvm_vcpu *vcpu, ulong esid, u64 *vsid);
 239         u64  (*ea_to_vp)(struct kvm_vcpu *vcpu, gva_t eaddr, bool data);
 240         bool (*is_dcbz32)(struct kvm_vcpu *vcpu);
 241 };
 242
 243 struct kvmppc_slb {
 244         u64 esid;
 245         u64 vsid;
 246         u64 orige;
 247         u64 origv;
 248         bool valid      : 1;
 249         bool Ks         : 1;
 250         bool Kp         : 1;
 251         bool nx         : 1;
 252         bool large      : 1;    /* PTEs are 16MB */
 253         bool tb         : 1;    /* 1TB segment */
 254         bool class      : 1;
 255 };
 256
 257 struct kvm_vcpu_arch {
 258         ulong host_stack;
 259         u32 host_pid;
 260 #ifdef CONFIG_PPC_BOOK3S
 261         ulong host_msr;
 262         ulong host_r2;
 263         void *host_retip;
 264         ulong trampoline_lowmem;
 265         ulong trampoline_enter;
 266         ulong highmem_handler;
 267         ulong rmcall;
 268         ulong host_paca_phys;
 269         struct kvmppc_slb slb[64];
 270         int slb_max;            /* 1 + index of last valid entry in slb[] */
 271         int slb_nr;             /* total number of entries in SLB */
 272         struct kvmppc_mmu mmu;
 273 #endif
 274
 275         ulong gpr[32];
 276
 277         u64 fpr[32];
 278         u64 fpscr;
 279
 280 #ifdef CONFIG_SPE
 281         ulong evr[32];
 282         ulong spefscr;
 283         ulong host_spefscr;
 284         u64 acc;
 285 #endif
 286 #ifdef CONFIG_ALTIVEC
 287         vector128 vr[32];
 288         vector128 vscr;
 289 #endif
 290
 291 #ifdef CONFIG_VSX
 292         u64 vsr[64];
 293 #endif
 294
 295 #ifdef CONFIG_PPC_BOOK3S
 296         /* For Gekko paired singles */
 297         u32 qpr[32];
 298 #endif
 299
 300         ulong pc;
 301         ulong ctr;
 302         ulong lr;
 303
 304         ulong xer;
 305         u32 cr;
 306
 307 #ifdef CONFIG_PPC_BOOK3S
 308         ulong hflags;
 309         ulong guest_owned_ext;
 310         ulong purr;
 311         ulong spurr;
 312         ulong dscr;
 313         ulong amr;
 314         ulong uamor;
 315         u32 ctrl;
 316         ulong dabr;
 317 #endif
 318         u32 vrsave; /* also USPRG0 */
 319         u32 mmucr;
 320         ulong shadow_msr;
 321         ulong sprg4;
 322         ulong sprg5;
 323         ulong sprg6;
 324         ulong sprg7;
 325         ulong csrr0;
 326         ulong csrr1;
 327         ulong dsrr0;
 328         ulong dsrr1;
 329         ulong mcsrr0;
 330         ulong mcsrr1;
 331         ulong mcsr;
 332         ulong esr;
 333         u32 dec;
 334         u32 decar;
 335         u32 tbl;
 336         u32 tbu;
 337         u32 tcr;
 338         u32 tsr;
 339         u32 ivor[64];
 340         ulong ivpr;
 341         u32 pir;
 342         u32 pvr;
 343
 344         u32 shadow_pid;
 345         u32 shadow_pid1;
 346         u32 pid;
 347         u32 swap_pid;
 348
 349         u32 ccr0;
 350         u32 ccr1;
 351         u32 dbcr0;
 352         u32 dbcr1;
 353         u32 dbsr;
 354
 355         u64 mmcr[3];
 356         u32 pmc[8];
 357
 358 #ifdef CONFIG_KVM_EXIT_TIMING
 359         struct mutex exit_timing_lock;
 360         struct kvmppc_exit_timing timing_exit;
 361         struct kvmppc_exit_timing timing_last_enter;
 362         u32 last_exit_type;
 363         u32 timing_count_type[__NUMBER_OF_KVM_EXIT_TYPES];
 364         u64 timing_sum_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 365         u64 timing_sum_quad_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 366         u64 timing_min_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 367         u64 timing_max_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 368         u64 timing_last_exit;
 369         struct dentry *debugfs_exit_timing;
 370 #endif
 371
 372 #ifdef CONFIG_PPC_BOOK3S
 373         ulong fault_dar;
 374         u32 fault_dsisr;
 375 #endif
 376
 377 #ifdef CONFIG_BOOKE
 378         ulong fault_dear;
 379         ulong fault_esr;
 380         ulong queued_dear;
 381         ulong queued_esr;
 382 #endif
 383         gpa_t paddr_accessed;
 384
 385         u8 io_gpr; /* GPR used as IO source/target */
 386         u8 mmio_is_bigendian;
 387         u8 mmio_sign_extend;
 388         u8 dcr_needed;
 389         u8 dcr_is_write;
 390         u8 osi_needed;
 391         u8 osi_enabled;
 392         u8 hcall_needed;
 393
 394         u32 cpr0_cfgaddr; /* holds the last set cpr0_cfgaddr */
 395
 396         struct hrtimer dec_timer;
 397         struct tasklet_struct tasklet;
 398         u64 dec_jiffies;
 399         u64 dec_expires;
 400         unsigned long pending_exceptions;
 401         u16 last_cpu;
 402         u8 ceded;
 403         u8 prodded;
 404         u32 last_inst;
 405
 406         struct lppaca *vpa;
 407         struct slb_shadow *slb_shadow;
 408         struct dtl *dtl;
 409         struct dtl *dtl_end;
 410
 411         struct kvmppc_vcore *vcore;
 412         int ret;
 413         int trap;
 414         int state;
 415         int ptid;
 416         wait_queue_head_t cpu_run;
 417
 418         struct kvm_vcpu_arch_shared *shared;
 419         unsigned long magic_page_pa; /* phys addr to map the magic page to */
 420         unsigned long magic_page_ea; /* effect. addr to map the magic page to */
 421
 422 #ifdef CONFIG_KVM_BOOK3S_64_HV
 423         struct kvm_vcpu_arch_shared shregs;
 424
 425         struct list_head run_list;
 426         struct task_struct *run_task;
 427         struct kvm_run *kvm_run;
 428 #endif
 429 };
 430
 431 #define KVMPPC_VCPU_BUSY_IN_HOST        0
 432 #define KVMPPC_VCPU_BLOCKED             1
 433 #define KVMPPC_VCPU_RUNNABLE            2
 434
 435 #endif /* __POWERPC_KVM_HOST_H__ */