arch/x86/kvm/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, unsigned access, unsigned int gen),
 206         TP_ARGS(sptep, gfn, access, gen),
 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 = access;
 219                 __entry->gen = gen;
 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 #define __spte_satisfied(__spte)                                \
 248         (__entry->retry && is_writable_pte(__entry->__spte))
 249
 250 TRACE_EVENT(
 251         fast_page_fault,
 252         TP_PROTO(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u32 error_code,
 253                  u64 *sptep, u64 old_spte, bool retry),
 254         TP_ARGS(vcpu, cr2_or_gpa, error_code, sptep, old_spte, retry),
 255
 256         TP_STRUCT__entry(
 257                 __field(int, vcpu_id)
 258                 __field(gpa_t, cr2_or_gpa)
 259                 __field(u32, error_code)
 260                 __field(u64 *, sptep)
 261                 __field(u64, old_spte)
 262                 __field(u64, new_spte)
 263                 __field(bool, retry)
 264         ),
 265
 266         TP_fast_assign(
 267                 __entry->vcpu_id = vcpu->vcpu_id;
 268                 __entry->cr2_or_gpa = cr2_or_gpa;
 269                 __entry->error_code = error_code;
 270                 __entry->sptep = sptep;
 271                 __entry->old_spte = old_spte;
 272                 __entry->new_spte = *sptep;
 273                 __entry->retry = retry;
 274         ),
 275
 276         TP_printk("vcpu %d gva %llx error_code %s sptep %p old %#llx"
 277                   " new %llx spurious %d fixed %d", __entry->vcpu_id,
 278                   __entry->cr2_or_gpa, __print_flags(__entry->error_code, "|",
 279                   kvm_mmu_trace_pferr_flags), __entry->sptep,
 280                   __entry->old_spte, __entry->new_spte,
 281                   __spte_satisfied(old_spte), __spte_satisfied(new_spte)
 282         )
 283 );
 284
 285 TRACE_EVENT(
 286         kvm_mmu_zap_all_fast,
 287         TP_PROTO(struct kvm *kvm),
 288         TP_ARGS(kvm),
 289
 290         TP_STRUCT__entry(
 291                 __field(__u8, mmu_valid_gen)
 292                 __field(unsigned int, mmu_used_pages)
 293         ),
 294
 295         TP_fast_assign(
 296                 __entry->mmu_valid_gen = kvm->arch.mmu_valid_gen;
 297                 __entry->mmu_used_pages = kvm->arch.n_used_mmu_pages;
 298         ),
 299
 300         TP_printk("kvm-mmu-valid-gen %u used_pages %x",
 301                   __entry->mmu_valid_gen, __entry->mmu_used_pages
 302         )
 303 );
 304
 305
 306 TRACE_EVENT(
 307         check_mmio_spte,
 308         TP_PROTO(u64 spte, unsigned int kvm_gen, unsigned int spte_gen),
 309         TP_ARGS(spte, kvm_gen, spte_gen),
 310
 311         TP_STRUCT__entry(
 312                 __field(unsigned int, kvm_gen)
 313                 __field(unsigned int, spte_gen)
 314                 __field(u64, spte)
 315         ),
 316
 317         TP_fast_assign(
 318                 __entry->kvm_gen = kvm_gen;
 319                 __entry->spte_gen = spte_gen;
 320                 __entry->spte = spte;
 321         ),
 322
 323         TP_printk("spte %llx kvm_gen %x spte-gen %x valid %d", __entry->spte,
 324                   __entry->kvm_gen, __entry->spte_gen,
 325                   __entry->kvm_gen == __entry->spte_gen
 326         )
 327 );
 328
 329 TRACE_EVENT(
 330         kvm_mmu_set_spte,
 331         TP_PROTO(int level, gfn_t gfn, u64 *sptep),
 332         TP_ARGS(level, gfn, sptep),
 333
 334         TP_STRUCT__entry(
 335                 __field(u64, gfn)
 336                 __field(u64, spte)
 337                 __field(u64, sptep)
 338                 __field(u8, level)
 339                 /* These depend on page entry type, so compute them now.  */
 340                 __field(bool, r)
 341                 __field(bool, x)
 342                 __field(u8, u)
 343         ),
 344
 345         TP_fast_assign(
 346                 __entry->gfn = gfn;
 347                 __entry->spte = *sptep;
 348                 __entry->sptep = virt_to_phys(sptep);
 349                 __entry->level = level;
 350                 __entry->r = shadow_present_mask || (__entry->spte & PT_PRESENT_MASK);
 351                 __entry->x = is_executable_pte(__entry->spte);
 352                 __entry->u = shadow_user_mask ? !!(__entry->spte & shadow_user_mask) : -1;
 353         ),
 354
 355         TP_printk("gfn %llx spte %llx (%s%s%s%s) level %d at %llx",
 356                   __entry->gfn, __entry->spte,
 357                   __entry->r ? "r" : "-",
 358                   __entry->spte & PT_WRITABLE_MASK ? "w" : "-",
 359                   __entry->x ? "x" : "-",
 360                   __entry->u == -1 ? "" : (__entry->u ? "u" : "-"),
 361                   __entry->level, __entry->sptep
 362         )
 363 );
 364
 365 TRACE_EVENT(
 366         kvm_mmu_spte_requested,
 367         TP_PROTO(gpa_t addr, int level, kvm_pfn_t pfn),
 368         TP_ARGS(addr, level, pfn),
 369
 370         TP_STRUCT__entry(
 371                 __field(u64, gfn)
 372                 __field(u64, pfn)
 373                 __field(u8, level)
 374         ),
 375
 376         TP_fast_assign(
 377                 __entry->gfn = addr >> PAGE_SHIFT;
 378                 __entry->pfn = pfn | (__entry->gfn & (KVM_PAGES_PER_HPAGE(level) - 1));
 379                 __entry->level = level;
 380         ),
 381
 382         TP_printk("gfn %llx pfn %llx level %d",
 383                   __entry->gfn, __entry->pfn, __entry->level
 384         )
 385 );
 386
 387 #endif /* _TRACE_KVMMMU_H */
 388
 389 #undef TRACE_INCLUDE_PATH
 390 #define TRACE_INCLUDE_PATH .
 391 #undef TRACE_INCLUDE_FILE
 392 #define TRACE_INCLUDE_FILE mmutrace
 393
 394 /* This part must be outside protection */
 395 #include <trace/define_trace.h>