LXR linux/arch/powerpc/include/asm/kvm

   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 SUSE Linux Products GmbH 2009
  16 *
  17 * Authors: Alexander Graf <agraf@suse.de>
  18 */
  19
  20#ifndef __ASM_KVM_BOOK3S_H__
  21#define __ASM_KVM_BOOK3S_H__
  22
  23#include <linux/types.h>
  24#include <linux/kvm_host.h>
  25#include <asm/kvm_book3s_asm.h>
  26
  27struct kvmppc_bat {
  28        u64 raw;
  29        u32 bepi;
  30        u32 bepi_mask;
  31        u32 brpn;
  32        u8 wimg;
  33        u8 pp;
  34        bool vs         : 1;
  35        bool vp         : 1;
  36};
  37
  38struct kvmppc_sid_map {
  39        u64 guest_vsid;
  40        u64 guest_esid;
  41        u64 host_vsid;
  42        bool valid      : 1;
  43};
  44
  45#define SID_MAP_BITS    9
  46#define SID_MAP_NUM     (1 << SID_MAP_BITS)
  47#define SID_MAP_MASK    (SID_MAP_NUM - 1)
  48
  49#ifdef CONFIG_PPC_BOOK3S_64
  50#define SID_CONTEXTS    1
  51#else
  52#define SID_CONTEXTS    128
  53#define VSID_POOL_SIZE  (SID_CONTEXTS * 16)
  54#endif
  55
  56struct hpte_cache {
  57        struct hlist_node list_pte;
  58        struct hlist_node list_pte_long;
  59        struct hlist_node list_vpte;
  60        struct hlist_node list_vpte_long;
  61        struct rcu_head rcu_head;
  62        u64 host_vpn;
  63        u64 pfn;
  64        ulong slot;
  65        struct kvmppc_pte pte;
  66};
  67
  68struct kvmppc_vcpu_book3s {
  69        struct kvm_vcpu vcpu;
  70        struct kvmppc_book3s_shadow_vcpu *shadow_vcpu;
  71        struct kvmppc_sid_map sid_map[SID_MAP_NUM];
  72        struct {
  73                u64 esid;
  74                u64 vsid;
  75        } slb_shadow[64];
  76        u8 slb_shadow_max;
  77        struct kvmppc_bat ibat[8];
  78        struct kvmppc_bat dbat[8];
  79        u64 hid[6];
  80        u64 gqr[8];
  81        u64 sdr1;
  82        u64 hior;
  83        u64 msr_mask;
  84        u64 purr_offset;
  85        u64 spurr_offset;
  86#ifdef CONFIG_PPC_BOOK3S_32
  87        u32 vsid_pool[VSID_POOL_SIZE];
  88        u32 vsid_next;
  89#else
  90        u64 proto_vsid_first;
  91        u64 proto_vsid_max;
  92        u64 proto_vsid_next;
  93#endif
  94        int context_id[SID_CONTEXTS];
  95
  96        bool hior_explicit;             /* HIOR is set by ioctl, not PVR */
  97
  98        struct hlist_head hpte_hash_pte[HPTEG_HASH_NUM_PTE];
  99        struct hlist_head hpte_hash_pte_long[HPTEG_HASH_NUM_PTE_LONG];
 100        struct hlist_head hpte_hash_vpte[HPTEG_HASH_NUM_VPTE];
 101        struct hlist_head hpte_hash_vpte_long[HPTEG_HASH_NUM_VPTE_LONG];
 102        int hpte_cache_count;
 103        spinlock_t mmu_lock;
 104};
 105
 106#define CONTEXT_HOST            0
 107#define CONTEXT_GUEST           1
 108#define CONTEXT_GUEST_END       2
 109
 110#define VSID_REAL       0x1fffffffffc00000ULL
 111#define VSID_BAT        0x1fffffffffb00000ULL
 112#define VSID_REAL_DR    0x2000000000000000ULL
 113#define VSID_REAL_IR    0x4000000000000000ULL
 114#define VSID_PR         0x8000000000000000ULL
 115
 116extern void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong ea, ulong ea_mask);
 117extern void kvmppc_mmu_pte_vflush(struct kvm_vcpu *vcpu, u64 vp, u64 vp_mask);
 118extern void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end);
 119extern void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 new_msr);
 120extern void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr);
 121extern void kvmppc_mmu_book3s_64_init(struct kvm_vcpu *vcpu);
 122extern void kvmppc_mmu_book3s_32_init(struct kvm_vcpu *vcpu);
 123extern void kvmppc_mmu_book3s_hv_init(struct kvm_vcpu *vcpu);
 124extern int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte);
 125extern int kvmppc_mmu_map_segment(struct kvm_vcpu *vcpu, ulong eaddr);
 126extern void kvmppc_mmu_flush_segments(struct kvm_vcpu *vcpu);
 127extern int kvmppc_book3s_hv_page_fault(struct kvm_run *run,
 128                        struct kvm_vcpu *vcpu, unsigned long addr,
 129                        unsigned long status);
 130extern long kvmppc_hv_find_lock_hpte(struct kvm *kvm, gva_t eaddr,
 131                        unsigned long slb_v, unsigned long valid);
 132
 133extern void kvmppc_mmu_hpte_cache_map(struct kvm_vcpu *vcpu, struct hpte_cache *pte);
 134extern struct hpte_cache *kvmppc_mmu_hpte_cache_next(struct kvm_vcpu *vcpu);
 135extern void kvmppc_mmu_hpte_destroy(struct kvm_vcpu *vcpu);
 136extern int kvmppc_mmu_hpte_init(struct kvm_vcpu *vcpu);
 137extern void kvmppc_mmu_invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte);
 138extern int kvmppc_mmu_hpte_sysinit(void);
 139extern void kvmppc_mmu_hpte_sysexit(void);
 140extern int kvmppc_mmu_hv_init(void);
 141
 142extern int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data);
 143extern int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data);
 144extern void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec);
 145extern void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
 146                                          unsigned int vec);
 147extern void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags);
 148extern void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat,
 149                           bool upper, u32 val);
 150extern void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr);
 151extern int kvmppc_emulate_paired_single(struct kvm_run *run, struct kvm_vcpu *vcpu);
 152extern pfn_t kvmppc_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn);
 153extern void kvmppc_add_revmap_chain(struct kvm *kvm, struct revmap_entry *rev,
 154                        unsigned long *rmap, long pte_index, int realmode);
 155extern void kvmppc_invalidate_hpte(struct kvm *kvm, unsigned long *hptep,
 156                        unsigned long pte_index);
 157void kvmppc_clear_ref_hpte(struct kvm *kvm, unsigned long *hptep,
 158                        unsigned long pte_index);
 159extern void *kvmppc_pin_guest_page(struct kvm *kvm, unsigned long addr,
 160                        unsigned long *nb_ret);
 161extern void kvmppc_unpin_guest_page(struct kvm *kvm, void *addr,
 162                        unsigned long gpa, bool dirty);
 163extern long kvmppc_virtmode_h_enter(struct kvm_vcpu *vcpu, unsigned long flags,
 164                        long pte_index, unsigned long pteh, unsigned long ptel);
 165extern long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
 166                        long pte_index, unsigned long pteh, unsigned long ptel,
 167                        pgd_t *pgdir, bool realmode, unsigned long *idx_ret);
 168extern long kvmppc_do_h_remove(struct kvm *kvm, unsigned long flags,
 169                        unsigned long pte_index, unsigned long avpn,
 170                        unsigned long *hpret);
 171extern long kvmppc_hv_get_dirty_log(struct kvm *kvm,
 172                        struct kvm_memory_slot *memslot, unsigned long *map);
 173
 174extern void kvmppc_entry_trampoline(void);
 175extern void kvmppc_hv_entry_trampoline(void);
 176extern void kvmppc_load_up_fpu(void);
 177extern void kvmppc_load_up_altivec(void);
 178extern void kvmppc_load_up_vsx(void);
 179extern u32 kvmppc_alignment_dsisr(struct kvm_vcpu *vcpu, unsigned int inst);
 180extern ulong kvmppc_alignment_dar(struct kvm_vcpu *vcpu, unsigned int inst);
 181extern int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd);
 182
 183static inline struct kvmppc_vcpu_book3s *to_book3s(struct kvm_vcpu *vcpu)
 184{
 185        return container_of(vcpu, struct kvmppc_vcpu_book3s, vcpu);
 186}
 187
 188extern void kvm_return_point(void);
 189
 190/* Also add subarch specific defines */
 191
 192#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
 193#include <asm/kvm_book3s_32.h>
 194#endif
 195#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
 196#include <asm/kvm_book3s_64.h>
 197#endif
 198
 199#ifdef CONFIG_KVM_BOOK3S_PR
 200
 201static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
 202{
 203        return to_book3s(vcpu)->hior;
 204}
 205
 206static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
 207                        unsigned long pending_now, unsigned long old_pending)
 208{
 209        if (pending_now)
 210                vcpu->arch.shared->int_pending = 1;
 211        else if (old_pending)
 212                vcpu->arch.shared->int_pending = 0;
 213}
 214
 215static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
 216{
 217        if ( num < 14 ) {
 218                struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 219                svcpu->gpr[num] = val;
 220                svcpu_put(svcpu);
 221                to_book3s(vcpu)->shadow_vcpu->gpr[num] = val;
 222        } else
 223                vcpu->arch.gpr[num] = val;
 224}
 225
 226static inline ulong kvmppc_get_gpr(struct kvm_vcpu *vcpu, int num)
 227{
 228        if ( num < 14 ) {
 229                struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 230                ulong r = svcpu->gpr[num];
 231                svcpu_put(svcpu);
 232                return r;
 233        } else
 234                return vcpu->arch.gpr[num];
 235}
 236
 237static inline void kvmppc_set_cr(struct kvm_vcpu *vcpu, u32 val)
 238{
 239        struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 240        svcpu->cr = val;
 241        svcpu_put(svcpu);
 242        to_book3s(vcpu)->shadow_vcpu->cr = val;
 243}
 244
 245static inline u32 kvmppc_get_cr(struct kvm_vcpu *vcpu)
 246{
 247        struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 248        u32 r;
 249        r = svcpu->cr;
 250        svcpu_put(svcpu);
 251        return r;
 252}
 253
 254static inline void kvmppc_set_xer(struct kvm_vcpu *vcpu, u32 val)
 255{
 256        struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 257        svcpu->xer = val;
 258        to_book3s(vcpu)->shadow_vcpu->xer = val;
 259        svcpu_put(svcpu);
 260}
 261
 262static inline u32 kvmppc_get_xer(struct kvm_vcpu *vcpu)
 263{
 264        struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 265        u32 r;
 266        r = svcpu->xer;
 267        svcpu_put(svcpu);
 268        return r;
 269}
 270
 271static inline void kvmppc_set_ctr(struct kvm_vcpu *vcpu, ulong val)
 272{
 273        struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 274        svcpu->ctr = val;
 275        svcpu_put(svcpu);
 276}
 277
 278static inline ulong kvmppc_get_ctr(struct kvm_vcpu *vcpu)
 279{
 280        struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 281        ulong r;
 282        r = svcpu->ctr;
 283        svcpu_put(svcpu);
 284        return r;
 285}
 286
 287static inline void kvmppc_set_lr(struct kvm_vcpu *vcpu, ulong val)
 288{
 289        struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 290        svcpu->lr = val;
 291        svcpu_put(svcpu);
 292}
 293
 294static inline ulong kvmppc_get_lr(struct kvm_vcpu *vcpu)
 295{
 296        struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 297        ulong r;
 298        r = svcpu->lr;
 299        svcpu_put(svcpu);
 300        return r;
 301}
 302
 303static inline void kvmppc_set_pc(struct kvm_vcpu *vcpu, ulong val)
 304{
 305        struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 306        svcpu->pc = val;
 307        svcpu_put(svcpu);
 308}
 309
 310static inline ulong kvmppc_get_pc(struct kvm_vcpu *vcpu)
 311{
 312        struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 313        ulong r;
 314        r = svcpu->pc;
 315        svcpu_put(svcpu);
 316        return r;
 317}
 318
 319static inline u32 kvmppc_get_last_inst(struct kvm_vcpu *vcpu)
 320{
 321        ulong pc = kvmppc_get_pc(vcpu);
 322        struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 323        u32 r;
 324
 325        /* Load the instruction manually if it failed to do so in the
 326         * exit path */
 327        if (svcpu->last_inst == KVM_INST_FETCH_FAILED)
 328                kvmppc_ld(vcpu, &pc, sizeof(u32), &svcpu->last_inst, false);
 329
 330        r = svcpu->last_inst;
 331        svcpu_put(svcpu);
 332        return r;
 333}
 334
 335static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
 336{
 337        struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 338        ulong r;
 339        r = svcpu->fault_dar;
 340        svcpu_put(svcpu);
 341        return r;
 342}
 343
 344static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
 345{
 346        ulong crit_raw = vcpu->arch.shared->critical;
 347        ulong crit_r1 = kvmppc_get_gpr(vcpu, 1);
 348        bool crit;
 349
 350        /* Truncate crit indicators in 32 bit mode */
 351        if (!(vcpu->arch.shared->msr & MSR_SF)) {
 352                crit_raw &= 0xffffffff;
 353                crit_r1 &= 0xffffffff;
 354        }
 355
 356        /* Critical section when crit == r1 */
 357        crit = (crit_raw == crit_r1);
 358        /* ... and we're in supervisor mode */
 359        crit = crit && !(vcpu->arch.shared->msr & MSR_PR);
 360
 361        return crit;
 362}
 363#else /* CONFIG_KVM_BOOK3S_PR */
 364
 365static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
 366{
 367        return 0;
 368}
 369
 370static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
 371                        unsigned long pending_now, unsigned long old_pending)
 372{
 373}
 374
 375static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
 376{
 377        vcpu->arch.gpr[num] = val;
 378}
 379
 380static inline ulong kvmppc_get_gpr(struct kvm_vcpu *vcpu, int num)
 381{
 382        return vcpu->arch.gpr[num];
 383}
 384
 385static inline void kvmppc_set_cr(struct kvm_vcpu *vcpu, u32 val)
 386{
 387        vcpu->arch.cr = val;
 388}
 389
 390static inline u32 kvmppc_get_cr(struct kvm_vcpu *vcpu)
 391{
 392        return vcpu->arch.cr;
 393}
 394
 395static inline void kvmppc_set_xer(struct kvm_vcpu *vcpu, u32 val)
 396{
 397        vcpu->arch.xer = val;
 398}
 399
 400static inline u32 kvmppc_get_xer(struct kvm_vcpu *vcpu)
 401{
 402        return vcpu->arch.xer;
 403}
 404
 405static inline void kvmppc_set_ctr(struct kvm_vcpu *vcpu, ulong val)
 406{
 407        vcpu->arch.ctr = val;
 408}
 409
 410static inline ulong kvmppc_get_ctr(struct kvm_vcpu *vcpu)
 411{
 412        return vcpu->arch.ctr;
 413}
 414
 415static inline void kvmppc_set_lr(struct kvm_vcpu *vcpu, ulong val)
 416{
 417        vcpu->arch.lr = val;
 418}
 419
 420static inline ulong kvmppc_get_lr(struct kvm_vcpu *vcpu)
 421{
 422        return vcpu->arch.lr;
 423}
 424
 425static inline void kvmppc_set_pc(struct kvm_vcpu *vcpu, ulong val)
 426{
 427        vcpu->arch.pc = val;
 428}
 429
 430static inline ulong kvmppc_get_pc(struct kvm_vcpu *vcpu)
 431{
 432        return vcpu->arch.pc;
 433}
 434
 435static inline u32 kvmppc_get_last_inst(struct kvm_vcpu *vcpu)
 436{
 437        ulong pc = kvmppc_get_pc(vcpu);
 438
 439        /* Load the instruction manually if it failed to do so in the
 440         * exit path */
 441        if (vcpu->arch.last_inst == KVM_INST_FETCH_FAILED)
 442                kvmppc_ld(vcpu, &pc, sizeof(u32), &vcpu->arch.last_inst, false);
 443
 444        return vcpu->arch.last_inst;
 445}
 446
 447static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
 448{
 449        return vcpu->arch.fault_dar;
 450}
 451
 452static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
 453{
 454        return false;
 455}
 456#endif
 457
 458/* Magic register values loaded into r3 and r4 before the 'sc' assembly
 459 * instruction for the OSI hypercalls */
 460#define OSI_SC_MAGIC_R3                 0x113724FA
 461#define OSI_SC_MAGIC_R4                 0x77810F9B
 462
 463#define INS_DCBZ                        0x7c0007ec
 464/* TO = 31 for unconditional trap */
 465#define INS_TW                          0x7fe00008
 466
 467/* LPIDs we support with this build -- runtime limit may be lower */
 468#define KVMPPC_NR_LPIDS                 (LPID_RSVD + 1)
 469
 470#endif /* __ASM_KVM_BOOK3S_H__ */
 471