arch/x86/kvm/mmu/mmutrace.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #if !defined(_TRACE_KVMMMU_H) || defined(TRACE_HEADER_MULTI_READ)
   3 #define _TRACE_KVMMMU_H
   4
   5 #include <linux/tracepoint.h>
   6 #include <linux/trace_events.h>
   7
   8 #undef TRACE_SYSTEM
   9 #define TRACE_SYSTEM kvmmmu
  10
  11 #define KVM_MMU_PAGE_FIELDS             \
  12         __field(__u8, mmu_valid_gen)    \
  13         __field(__u64, gfn)             \
  14         __field(__u32, role)            \
  15         __field(__u32, root_count)      \
  16         __field(bool, unsync)
  17
  18 #define KVM_MMU_PAGE_ASSIGN(sp)                         \
  19         __entry->mmu_valid_gen = sp->mmu_valid_gen;     \
  20         __entry->gfn = sp->gfn;                         \
  21         __entry->role = sp->role.word;                  \
  22         __entry->root_count = sp->root_count;           \
  23         __entry->unsync = sp->unsync;
  24
  25 #define KVM_MMU_PAGE_PRINTK() ({                                        \
  26         const char *saved_ptr = trace_seq_buffer_ptr(p);                \
  27         static const char *access_str[] = {                             \
  28                 "---", "--x", "w--", "w-x", "-u-", "-ux", "wu-", "wux"  \
  29         };                                                              \
  30         union kvm_mmu_page_role role;                                   \
  31                                                                         \
  32         role.word = __entry->role;                                      \
  33                                                                         \
  34         trace_seq_printf(p, "sp gen %u gfn %llx l%u %u-byte q%u%s %s%s" \
  35                          " %snxe %sad root %u %s%c",                    \
  36                          __entry->mmu_valid_gen,                        \
  37                          __entry->gfn, role.level,                      \
  38                          role.gpte_is_8_bytes ? 8 : 4,                  \
  39                          role.quadrant,                                 \
  40                          role.direct ? " direct" : "",                  \
  41                          access_str[role.access],                       \
  42                          role.invalid ? " invalid" : "",                \
  43                          role.nxe ? "" : "!",                           \
  44                          role.ad_disabled ? "!" : "",                   \
  45                          __entry->root_count,                           \
  46                          __entry->unsync ? "unsync" : "sync", 0);       \
  47         saved_ptr;                                                      \
  48                 })
  49
  50 #define kvm_mmu_trace_pferr_flags       \
  51         { PFERR_PRESENT_MASK, "P" },    \
  52         { PFERR_WRITE_MASK, "W" },      \
  53         { PFERR_USER_MASK, "U" },       \
  54         { PFERR_RSVD_MASK, "RSVD" },    \
  55         { PFERR_FETCH_MASK, "F" }
  56
  57 /*
  58  * A pagetable walk has started
  59  */
  60 TRACE_EVENT(
  61         kvm_mmu_pagetable_walk,
  62         TP_PROTO(u64 addr, u32 pferr),
  63         TP_ARGS(addr, pferr),
  64
  65         TP_STRUCT__entry(
  66                 __field(__u64, addr)
  67                 __field(__u32, pferr)
  68         ),
  69
  70         TP_fast_assign(
  71                 __entry->addr = addr;
  72                 __entry->pferr = pferr;
  73         ),
  74
  75         TP_printk("addr %llx pferr %x %s", __entry->addr, __entry->pferr,
  76                   __print_flags(__entry->pferr, "|", kvm_mmu_trace_pferr_flags))
  77 );
  78
  79
  80 /* We just walked a paging element */
  81 TRACE_EVENT(
  82         kvm_mmu_paging_element,
  83         TP_PROTO(u64 pte, int level),
  84         TP_ARGS(pte, level),
  85
  86         TP_STRUCT__entry(
  87                 __field(__u64, pte)
  88                 __field(__u32, level)
  89                 ),
  90
  91         TP_fast_assign(
  92                 __entry->pte = pte;
  93                 __entry->level = level;
  94                 ),
  95
  96         TP_printk("pte %llx level %u", __entry->pte, __entry->level)
  97 );
  98
  99 DECLARE_EVENT_CLASS(kvm_mmu_set_bit_class,
 100
 101         TP_PROTO(unsigned long table_gfn, unsigned index, unsigned size),
 102
 103         TP_ARGS(table_gfn, index, size),
 104
 105         TP_STRUCT__entry(
 106                 __field(__u64, gpa)
 107         ),
 108
 109         TP_fast_assign(
 110                 __entry->gpa = ((u64)table_gfn << PAGE_SHIFT)
 111                                 + index * size;
 112                 ),
 113
 114         TP_printk("gpa %llx", __entry->gpa)
 115 );
 116
 117 /* We set a pte accessed bit */
 118 DEFINE_EVENT(kvm_mmu_set_bit_class, kvm_mmu_set_accessed_bit,
 119
 120         TP_PROTO(unsigned long table_gfn, unsigned index, unsigned size),
 121
 122         TP_ARGS(table_gfn, index, size)
 123 );
 124
 125 /* We set a pte dirty bit */
 126 DEFINE_EVENT(kvm_mmu_set_bit_class, kvm_mmu_set_dirty_bit,
 127
 128         TP_PROTO(unsigned long table_gfn, unsigned index, unsigned size),
 129
 130         TP_ARGS(table_gfn, index, size)
 131 );
 132
 133 TRACE_EVENT(
 134         kvm_mmu_walker_error,
 135         TP_PROTO(u32 pferr),
 136         TP_ARGS(pferr),
 137
 138         TP_STRUCT__entry(
 139                 __field(__u32, pferr)
 140                 ),
 141
 142         TP_fast_assign(
 143                 __entry->pferr = pferr;
 144                 ),
 145
 146         TP_printk("pferr %x %s", __entry->pferr,
 147                   __print_flags(__entry->pferr, "|", kvm_mmu_trace_pferr_flags))
 148 );
 149
 150 TRACE_EVENT(
 151         kvm_mmu_get_page,
 152         TP_PROTO(struct kvm_mmu_page *sp, bool created),
 153         TP_ARGS(sp, created),
 154
 155         TP_STRUCT__entry(
 156                 KVM_MMU_PAGE_FIELDS
 157                 __field(bool, created)
 158                 ),
 159
 160         TP_fast_assign(
 161                 KVM_MMU_PAGE_ASSIGN(sp)
 162                 __entry->created = created;
 163                 ),
 164
 165         TP_printk("%s %s", KVM_MMU_PAGE_PRINTK(),
 166                   __entry->created ? "new" : "existing")
 167 );
 168
 169 DECLARE_EVENT_CLASS(kvm_mmu_page_class,
 170
 171         TP_PROTO(struct kvm_mmu_page *sp),
 172         TP_ARGS(sp),
 173
 174         TP_STRUCT__entry(
 175                 KVM_MMU_PAGE_FIELDS
 176         ),
 177
 178         TP_fast_assign(
 179                 KVM_MMU_PAGE_ASSIGN(sp)
 180         ),
 181
 182         TP_printk("%s", KVM_MMU_PAGE_PRINTK())
 183 );
 184
 185 DEFINE_EVENT(kvm_mmu_page_class, kvm_mmu_sync_page,
 186         TP_PROTO(struct kvm_mmu_page *sp),
 187
 188         TP_ARGS(sp)
 189 );
 190
 191 DEFINE_EVENT(kvm_mmu_page_class, kvm_mmu_unsync_page,
 192         TP_PROTO(struct kvm_mmu_page *sp),
 193
 194         TP_ARGS(sp)
 195 );
 196
 197 DEFINE_EVENT(kvm_mmu_page_class, kvm_mmu_prepare_zap_page,
 198         TP_PROTO(struct kvm_mmu_page *sp),
 199
 200         TP_ARGS(sp)
 201 );
 202
 203 TRACE_EVENT(
 204         mark_mmio_spte,
 205         TP_PROTO(u64 *sptep, gfn_t gfn, u64 spte),
 206         TP_ARGS(sptep, gfn, spte),
 207
 208         TP_STRUCT__entry(
 209                 __field(void *, sptep)
 210                 __field(gfn_t, gfn)
 211                 __field(unsigned, access)
 212                 __field(unsigned int, gen)
 213         ),
 214
 215         TP_fast_assign(
 216                 __entry->sptep = sptep;
 217                 __entry->gfn = gfn;
 218                 __entry->access = spte & ACC_ALL;
 219                 __entry->gen = get_mmio_spte_generation(spte);
 220         ),
 221
 222         TP_printk("sptep:%p gfn %llx access %x gen %x", __entry->sptep,
 223                   __entry->gfn, __entry->access, __entry->gen)
 224 );
 225
 226 TRACE_EVENT(
 227         handle_mmio_page_fault,
 228         TP_PROTO(u64 addr, gfn_t gfn, unsigned access),
 229         TP_ARGS(addr, gfn, access),
 230
 231         TP_STRUCT__entry(
 232                 __field(u64, addr)
 233                 __field(gfn_t, gfn)
 234                 __field(unsigned, access)
 235         ),
 236
 237         TP_fast_assign(
 238                 __entry->addr = addr;
 239                 __entry->gfn = gfn;
 240                 __entry->access = access;
 241         ),
 242
 243         TP_printk("addr:%llx gfn %llx access %x", __entry->addr, __entry->gfn,
 244                   __entry->access)
 245 );
 246
 247 TRACE_EVENT(
 248         fast_page_fault,
 249         TP_PROTO(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u32 error_code,
 250                  u64 *sptep, u64 old_spte, int ret),
 251         TP_ARGS(vcpu, cr2_or_gpa, error_code, sptep, old_spte, ret),
 252
 253         TP_STRUCT__entry(
 254                 __field(int, vcpu_id)
 255                 __field(gpa_t, cr2_or_gpa)
 256                 __field(u32, error_code)
 257                 __field(u64 *, sptep)
 258                 __field(u64, old_spte)
 259                 __field(u64, new_spte)
 260                 __field(int, ret)
 261         ),
 262
 263         TP_fast_assign(
 264                 __entry->vcpu_id = vcpu->vcpu_id;
 265                 __entry->cr2_or_gpa = cr2_or_gpa;
 266                 __entry->error_code = error_code;
 267                 __entry->sptep = sptep;
 268                 __entry->old_spte = old_spte;
 269                 __entry->new_spte = *sptep;
 270                 __entry->ret = ret;
 271         ),
 272
 273         TP_printk("vcpu %d gva %llx error_code %s sptep %p old %#llx"
 274                   " new %llx spurious %d fixed %d", __entry->vcpu_id,
 275                   __entry->cr2_or_gpa, __print_flags(__entry->error_code, "|",
 276                   kvm_mmu_trace_pferr_flags), __entry->sptep,
 277                   __entry->old_spte, __entry->new_spte,
 278                   __entry->ret == RET_PF_SPURIOUS, __entry->ret == RET_PF_FIXED
 279         )
 280 );
 281
 282 TRACE_EVENT(
 283         kvm_mmu_zap_all_fast,
 284         TP_PROTO(struct kvm *kvm),
 285         TP_ARGS(kvm),
 286
 287         TP_STRUCT__entry(
 288                 __field(__u8, mmu_valid_gen)
 289                 __field(unsigned int, mmu_used_pages)
 290         ),
 291
 292         TP_fast_assign(
 293                 __entry->mmu_valid_gen = kvm->arch.mmu_valid_gen;
 294                 __entry->mmu_used_pages = kvm->arch.n_used_mmu_pages;
 295         ),
 296
 297         TP_printk("kvm-mmu-valid-gen %u used_pages %x",
 298                   __entry->mmu_valid_gen, __entry->mmu_used_pages
 299         )
 300 );
 301
 302
 303 TRACE_EVENT(
 304         check_mmio_spte,
 305         TP_PROTO(u64 spte, unsigned int kvm_gen, unsigned int spte_gen),
 306         TP_ARGS(spte, kvm_gen, spte_gen),
 307
 308         TP_STRUCT__entry(
 309                 __field(unsigned int, kvm_gen)
 310                 __field(unsigned int, spte_gen)
 311                 __field(u64, spte)
 312         ),
 313
 314         TP_fast_assign(
 315                 __entry->kvm_gen = kvm_gen;
 316                 __entry->spte_gen = spte_gen;
 317                 __entry->spte = spte;
 318         ),
 319
 320         TP_printk("spte %llx kvm_gen %x spte-gen %x valid %d", __entry->spte,
 321                   __entry->kvm_gen, __entry->spte_gen,
 322                   __entry->kvm_gen == __entry->spte_gen
 323         )
 324 );
 325
 326 TRACE_EVENT(
 327         kvm_mmu_set_spte,
 328         TP_PROTO(int level, gfn_t gfn, u64 *sptep),
 329         TP_ARGS(level, gfn, sptep),
 330
 331         TP_STRUCT__entry(
 332                 __field(u64, gfn)
 333                 __field(u64, spte)
 334                 __field(u64, sptep)
 335                 __field(u8, level)
 336                 /* These depend on page entry type, so compute them now.  */
 337                 __field(bool, r)
 338                 __field(bool, x)
 339                 __field(signed char, u)
 340         ),
 341
 342         TP_fast_assign(
 343                 __entry->gfn = gfn;
 344                 __entry->spte = *sptep;
 345                 __entry->sptep = virt_to_phys(sptep);
 346                 __entry->level = level;
 347                 __entry->r = shadow_present_mask || (__entry->spte & PT_PRESENT_MASK);
 348                 __entry->x = is_executable_pte(__entry->spte);
 349                 __entry->u = shadow_user_mask ? !!(__entry->spte & shadow_user_mask) : -1;
 350         ),
 351
 352         TP_printk("gfn %llx spte %llx (%s%s%s%s) level %d at %llx",
 353                   __entry->gfn, __entry->spte,
 354                   __entry->r ? "r" : "-",
 355                   __entry->spte & PT_WRITABLE_MASK ? "w" : "-",
 356                   __entry->x ? "x" : "-",
 357                   __entry->u == -1 ? "" : (__entry->u ? "u" : "-"),
 358                   __entry->level, __entry->sptep
 359         )
 360 );
 361
 362 TRACE_EVENT(
 363         kvm_mmu_spte_requested,
 364         TP_PROTO(gpa_t addr, int level, kvm_pfn_t pfn),
 365         TP_ARGS(addr, level, pfn),
 366
 367         TP_STRUCT__entry(
 368                 __field(u64, gfn)
 369                 __field(u64, pfn)
 370                 __field(u8, level)
 371         ),
 372
 373         TP_fast_assign(
 374                 __entry->gfn = addr >> PAGE_SHIFT;
 375                 __entry->pfn = pfn | (__entry->gfn & (KVM_PAGES_PER_HPAGE(level) - 1));
 376                 __entry->level = level;
 377         ),
 378
 379         TP_printk("gfn %llx pfn %llx level %d",
 380                   __entry->gfn, __entry->pfn, __entry->level
 381         )
 382 );
 383
 384 #endif /* _TRACE_KVMMMU_H */
 385
 386 #undef TRACE_INCLUDE_PATH
 387 #define TRACE_INCLUDE_PATH mmu
 388 #undef TRACE_INCLUDE_FILE
 389 #define TRACE_INCLUDE_FILE mmutrace
 390
 391 /* This part must be outside protection */
 392 #include <trace/define_trace.h>