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