linux/arch/powerpc/include/asm/kvm_book3s.h
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   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#ifdef CONFIG_PPC_BOOK3S_64
  62        struct hlist_node list_vpte_64k;
  63#endif
  64        struct rcu_head rcu_head;
  65        u64 host_vpn;
  66        u64 pfn;
  67        ulong slot;
  68        struct kvmppc_pte pte;
  69        int pagesize;
  70};
  71
  72/*
  73 * Struct for a virtual core.
  74 * Note: entry_exit_map combines a bitmap of threads that have entered
  75 * in the bottom 8 bits and a bitmap of threads that have exited in the
  76 * next 8 bits.  This is so that we can atomically set the entry bit
  77 * iff the exit map is 0 without taking a lock.
  78 */
  79struct kvmppc_vcore {
  80        int n_runnable;
  81        int num_threads;
  82        int entry_exit_map;
  83        int napping_threads;
  84        int first_vcpuid;
  85        u16 pcpu;
  86        u16 last_cpu;
  87        u8 vcore_state;
  88        u8 in_guest;
  89        struct kvm_vcpu *runnable_threads[MAX_SMT_THREADS];
  90        struct list_head preempt_list;
  91        spinlock_t lock;
  92        struct swait_queue_head wq;
  93        spinlock_t stoltb_lock; /* protects stolen_tb and preempt_tb */
  94        u64 stolen_tb;
  95        u64 preempt_tb;
  96        struct kvm_vcpu *runner;
  97        struct kvm *kvm;
  98        u64 tb_offset;          /* guest timebase - host timebase */
  99        ulong lpcr;
 100        u32 arch_compat;
 101        ulong pcr;
 102        ulong dpdes;            /* doorbell state (POWER8) */
 103        ulong vtb;              /* virtual timebase */
 104        ulong conferring_threads;
 105        unsigned int halt_poll_ns;
 106};
 107
 108struct kvmppc_vcpu_book3s {
 109        struct kvmppc_sid_map sid_map[SID_MAP_NUM];
 110        struct {
 111                u64 esid;
 112                u64 vsid;
 113        } slb_shadow[64];
 114        u8 slb_shadow_max;
 115        struct kvmppc_bat ibat[8];
 116        struct kvmppc_bat dbat[8];
 117        u64 hid[6];
 118        u64 gqr[8];
 119        u64 sdr1;
 120        u64 hior;
 121        u64 msr_mask;
 122        u64 vtb;
 123#ifdef CONFIG_PPC_BOOK3S_32
 124        u32 vsid_pool[VSID_POOL_SIZE];
 125        u32 vsid_next;
 126#else
 127        u64 proto_vsid_first;
 128        u64 proto_vsid_max;
 129        u64 proto_vsid_next;
 130#endif
 131        int context_id[SID_CONTEXTS];
 132
 133        bool hior_explicit;             /* HIOR is set by ioctl, not PVR */
 134
 135        struct hlist_head hpte_hash_pte[HPTEG_HASH_NUM_PTE];
 136        struct hlist_head hpte_hash_pte_long[HPTEG_HASH_NUM_PTE_LONG];
 137        struct hlist_head hpte_hash_vpte[HPTEG_HASH_NUM_VPTE];
 138        struct hlist_head hpte_hash_vpte_long[HPTEG_HASH_NUM_VPTE_LONG];
 139#ifdef CONFIG_PPC_BOOK3S_64
 140        struct hlist_head hpte_hash_vpte_64k[HPTEG_HASH_NUM_VPTE_64K];
 141#endif
 142        int hpte_cache_count;
 143        spinlock_t mmu_lock;
 144};
 145
 146#define VSID_REAL       0x07ffffffffc00000ULL
 147#define VSID_BAT        0x07ffffffffb00000ULL
 148#define VSID_64K        0x0800000000000000ULL
 149#define VSID_1T         0x1000000000000000ULL
 150#define VSID_REAL_DR    0x2000000000000000ULL
 151#define VSID_REAL_IR    0x4000000000000000ULL
 152#define VSID_PR         0x8000000000000000ULL
 153
 154extern void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong ea, ulong ea_mask);
 155extern void kvmppc_mmu_pte_vflush(struct kvm_vcpu *vcpu, u64 vp, u64 vp_mask);
 156extern void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end);
 157extern void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 new_msr);
 158extern void kvmppc_mmu_book3s_64_init(struct kvm_vcpu *vcpu);
 159extern void kvmppc_mmu_book3s_32_init(struct kvm_vcpu *vcpu);
 160extern void kvmppc_mmu_book3s_hv_init(struct kvm_vcpu *vcpu);
 161extern int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte,
 162                               bool iswrite);
 163extern void kvmppc_mmu_unmap_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte);
 164extern int kvmppc_mmu_map_segment(struct kvm_vcpu *vcpu, ulong eaddr);
 165extern void kvmppc_mmu_flush_segment(struct kvm_vcpu *vcpu, ulong eaddr, ulong seg_size);
 166extern void kvmppc_mmu_flush_segments(struct kvm_vcpu *vcpu);
 167extern int kvmppc_book3s_hv_page_fault(struct kvm_run *run,
 168                        struct kvm_vcpu *vcpu, unsigned long addr,
 169                        unsigned long status);
 170extern long kvmppc_hv_find_lock_hpte(struct kvm *kvm, gva_t eaddr,
 171                        unsigned long slb_v, unsigned long valid);
 172extern int kvmppc_hv_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu,
 173                        unsigned long gpa, gva_t ea, int is_store);
 174
 175extern void kvmppc_mmu_hpte_cache_map(struct kvm_vcpu *vcpu, struct hpte_cache *pte);
 176extern struct hpte_cache *kvmppc_mmu_hpte_cache_next(struct kvm_vcpu *vcpu);
 177extern void kvmppc_mmu_hpte_cache_free(struct hpte_cache *pte);
 178extern void kvmppc_mmu_hpte_destroy(struct kvm_vcpu *vcpu);
 179extern int kvmppc_mmu_hpte_init(struct kvm_vcpu *vcpu);
 180extern void kvmppc_mmu_invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte);
 181extern int kvmppc_mmu_hpte_sysinit(void);
 182extern void kvmppc_mmu_hpte_sysexit(void);
 183extern int kvmppc_mmu_hv_init(void);
 184extern int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hc);
 185
 186extern int kvmppc_book3s_radix_page_fault(struct kvm_run *run,
 187                        struct kvm_vcpu *vcpu,
 188                        unsigned long ea, unsigned long dsisr);
 189extern int kvmppc_mmu_radix_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
 190                        struct kvmppc_pte *gpte, bool data, bool iswrite);
 191extern int kvmppc_init_vm_radix(struct kvm *kvm);
 192extern void kvmppc_free_radix(struct kvm *kvm);
 193extern int kvmppc_radix_init(void);
 194extern void kvmppc_radix_exit(void);
 195extern int kvm_unmap_radix(struct kvm *kvm, struct kvm_memory_slot *memslot,
 196                        unsigned long gfn);
 197extern int kvm_age_radix(struct kvm *kvm, struct kvm_memory_slot *memslot,
 198                        unsigned long gfn);
 199extern int kvm_test_age_radix(struct kvm *kvm, struct kvm_memory_slot *memslot,
 200                        unsigned long gfn);
 201extern long kvmppc_hv_get_dirty_log_radix(struct kvm *kvm,
 202                        struct kvm_memory_slot *memslot, unsigned long *map);
 203extern int kvmhv_get_rmmu_info(struct kvm *kvm, struct kvm_ppc_rmmu_info *info);
 204
 205/* XXX remove this export when load_last_inst() is generic */
 206extern int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data);
 207extern void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec);
 208extern void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
 209                                          unsigned int vec);
 210extern void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags);
 211extern void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat,
 212                           bool upper, u32 val);
 213extern void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr);
 214extern int kvmppc_emulate_paired_single(struct kvm_run *run, struct kvm_vcpu *vcpu);
 215extern kvm_pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa,
 216                        bool writing, bool *writable);
 217extern void kvmppc_add_revmap_chain(struct kvm *kvm, struct revmap_entry *rev,
 218                        unsigned long *rmap, long pte_index, int realmode);
 219extern void kvmppc_update_rmap_change(unsigned long *rmap, unsigned long psize);
 220extern void kvmppc_invalidate_hpte(struct kvm *kvm, __be64 *hptep,
 221                        unsigned long pte_index);
 222void kvmppc_clear_ref_hpte(struct kvm *kvm, __be64 *hptep,
 223                        unsigned long pte_index);
 224extern void *kvmppc_pin_guest_page(struct kvm *kvm, unsigned long addr,
 225                        unsigned long *nb_ret);
 226extern void kvmppc_unpin_guest_page(struct kvm *kvm, void *addr,
 227                        unsigned long gpa, bool dirty);
 228extern long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
 229                        long pte_index, unsigned long pteh, unsigned long ptel,
 230                        pgd_t *pgdir, bool realmode, unsigned long *idx_ret);
 231extern long kvmppc_do_h_remove(struct kvm *kvm, unsigned long flags,
 232                        unsigned long pte_index, unsigned long avpn,
 233                        unsigned long *hpret);
 234extern long kvmppc_hv_get_dirty_log_hpt(struct kvm *kvm,
 235                        struct kvm_memory_slot *memslot, unsigned long *map);
 236extern void kvmppc_harvest_vpa_dirty(struct kvmppc_vpa *vpa,
 237                        struct kvm_memory_slot *memslot,
 238                        unsigned long *map);
 239extern void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr,
 240                        unsigned long mask);
 241extern void kvmppc_set_fscr(struct kvm_vcpu *vcpu, u64 fscr);
 242
 243extern void kvmppc_entry_trampoline(void);
 244extern void kvmppc_hv_entry_trampoline(void);
 245extern u32 kvmppc_alignment_dsisr(struct kvm_vcpu *vcpu, unsigned int inst);
 246extern ulong kvmppc_alignment_dar(struct kvm_vcpu *vcpu, unsigned int inst);
 247extern int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd);
 248extern void kvmppc_pr_init_default_hcalls(struct kvm *kvm);
 249extern int kvmppc_hcall_impl_pr(unsigned long cmd);
 250extern int kvmppc_hcall_impl_hv_realmode(unsigned long cmd);
 251extern void kvmppc_copy_to_svcpu(struct kvmppc_book3s_shadow_vcpu *svcpu,
 252                                 struct kvm_vcpu *vcpu);
 253extern void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu,
 254                                   struct kvmppc_book3s_shadow_vcpu *svcpu);
 255extern int kvm_irq_bypass;
 256
 257static inline struct kvmppc_vcpu_book3s *to_book3s(struct kvm_vcpu *vcpu)
 258{
 259        return vcpu->arch.book3s;
 260}
 261
 262/* Also add subarch specific defines */
 263
 264#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
 265#include <asm/kvm_book3s_32.h>
 266#endif
 267#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
 268#include <asm/kvm_book3s_64.h>
 269#endif
 270
 271static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
 272{
 273        vcpu->arch.gpr[num] = val;
 274}
 275
 276static inline ulong kvmppc_get_gpr(struct kvm_vcpu *vcpu, int num)
 277{
 278        return vcpu->arch.gpr[num];
 279}
 280
 281static inline void kvmppc_set_cr(struct kvm_vcpu *vcpu, u32 val)
 282{
 283        vcpu->arch.cr = val;
 284}
 285
 286static inline u32 kvmppc_get_cr(struct kvm_vcpu *vcpu)
 287{
 288        return vcpu->arch.cr;
 289}
 290
 291static inline void kvmppc_set_xer(struct kvm_vcpu *vcpu, ulong val)
 292{
 293        vcpu->arch.xer = val;
 294}
 295
 296static inline ulong kvmppc_get_xer(struct kvm_vcpu *vcpu)
 297{
 298        return vcpu->arch.xer;
 299}
 300
 301static inline void kvmppc_set_ctr(struct kvm_vcpu *vcpu, ulong val)
 302{
 303        vcpu->arch.ctr = val;
 304}
 305
 306static inline ulong kvmppc_get_ctr(struct kvm_vcpu *vcpu)
 307{
 308        return vcpu->arch.ctr;
 309}
 310
 311static inline void kvmppc_set_lr(struct kvm_vcpu *vcpu, ulong val)
 312{
 313        vcpu->arch.lr = val;
 314}
 315
 316static inline ulong kvmppc_get_lr(struct kvm_vcpu *vcpu)
 317{
 318        return vcpu->arch.lr;
 319}
 320
 321static inline void kvmppc_set_pc(struct kvm_vcpu *vcpu, ulong val)
 322{
 323        vcpu->arch.pc = val;
 324}
 325
 326static inline ulong kvmppc_get_pc(struct kvm_vcpu *vcpu)
 327{
 328        return vcpu->arch.pc;
 329}
 330
 331static inline u64 kvmppc_get_msr(struct kvm_vcpu *vcpu);
 332static inline bool kvmppc_need_byteswap(struct kvm_vcpu *vcpu)
 333{
 334        return (kvmppc_get_msr(vcpu) & MSR_LE) != (MSR_KERNEL & MSR_LE);
 335}
 336
 337static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
 338{
 339        return vcpu->arch.fault_dar;
 340}
 341
 342static inline bool is_kvmppc_resume_guest(int r)
 343{
 344        return (r == RESUME_GUEST || r == RESUME_GUEST_NV);
 345}
 346
 347static inline bool is_kvmppc_hv_enabled(struct kvm *kvm);
 348static inline bool kvmppc_supports_magic_page(struct kvm_vcpu *vcpu)
 349{
 350        /* Only PR KVM supports the magic page */
 351        return !is_kvmppc_hv_enabled(vcpu->kvm);
 352}
 353
 354extern int kvmppc_h_logical_ci_load(struct kvm_vcpu *vcpu);
 355extern int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu);
 356
 357/* Magic register values loaded into r3 and r4 before the 'sc' assembly
 358 * instruction for the OSI hypercalls */
 359#define OSI_SC_MAGIC_R3                 0x113724FA
 360#define OSI_SC_MAGIC_R4                 0x77810F9B
 361
 362#define INS_DCBZ                        0x7c0007ec
 363/* TO = 31 for unconditional trap */
 364#define INS_TW                          0x7fe00008
 365
 366/* LPIDs we support with this build -- runtime limit may be lower */
 367#define KVMPPC_NR_LPIDS                 (LPID_RSVD + 1)
 368
 369#define SPLIT_HACK_MASK                 0xff000000
 370#define SPLIT_HACK_OFFS                 0xfb000000
 371
 372#endif /* __ASM_KVM_BOOK3S_H__ */
 373
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