mmutrace.h

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#if !defined(_TRACE_KVMMMU_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_KVMMMU_H

#include <linux/tracepoint.h>
#include <linux/ftrace_event.h>

#undef TRACE_SYSTEM
#define TRACE_SYSTEM kvmmmu

#define KVM_MMU_PAGE_FIELDS \
    __field(__u64, gfn) \
    __field(__u32, role) \
    __field(__u32, root_count) \
    __field(bool, unsync)

#define KVM_MMU_PAGE_ASSIGN(sp)              \
    __entry->gfn = sp->gfn;              \
    __entry->role = sp->role.word;           \
    __entry->root_count = sp->root_count;        \
    __entry->unsync = sp->unsync;

#define KVM_MMU_PAGE_PRINTK() ({                        \
    const char *ret = p->buffer + p->len;               \
    static const char *access_str[] = {                 \
        "---", "--x", "w--", "w-x", "-u-", "-ux", "wu-", "wux"  \
    };                                  \
    union kvm_mmu_page_role role;                       \
                                        \
    role.word = __entry->role;                  \
                                    \
    trace_seq_printf(p, "sp gfn %llx %u%s q%u%s %s%s"       \
             " %snxe root %u %s%c",             \
             __entry->gfn, role.level,          \
             role.cr4_pae ? " pae" : "",            \
             role.quadrant,                 \
             role.direct ? " direct" : "",          \
             access_str[role.access],           \
             role.invalid ? " invalid" : "",        \
             role.nxe ? "" : "!",               \
             __entry->root_count,               \
             __entry->unsync ? "unsync" : "sync", 0);   \
    ret;                                \
        })

#define kvm_mmu_trace_pferr_flags       \
    { PFERR_PRESENT_MASK, "P" },    \
    { PFERR_WRITE_MASK, "W" },  \
    { PFERR_USER_MASK, "U" },   \
    { PFERR_RSVD_MASK, "RSVD" },    \
    { PFERR_FETCH_MASK, "F" }

/*
 * A pagetable walk has started
 */
TRACE_EVENT(
    kvm_mmu_pagetable_walk,
    TP_PROTO(u64 addr, u32 pferr),
    TP_ARGS(addr, pferr),

    TP_STRUCT__entry(
        __field(__u64, addr)
        __field(__u32, pferr)
    ),

    TP_fast_assign(
        __entry->addr = addr;
        __entry->pferr = pferr;
    ),

    TP_printk("addr %llx pferr %x %s", __entry->addr, __entry->pferr,
          __print_flags(__entry->pferr, "|", kvm_mmu_trace_pferr_flags))
);


/* We just walked a paging element */
TRACE_EVENT(
    kvm_mmu_paging_element,
    TP_PROTO(u64 pte, int level),
    TP_ARGS(pte, level),

    TP_STRUCT__entry(
        __field(__u64, pte)
        __field(__u32, level)
        ),

    TP_fast_assign(
        __entry->pte = pte;
        __entry->level = level;
        ),

    TP_printk("pte %llx level %u", __entry->pte, __entry->level)
);

DECLARE_EVENT_CLASS(kvm_mmu_set_bit_class,

    TP_PROTO(unsigned long table_gfn, unsigned index, unsigned size),

    TP_ARGS(table_gfn, index, size),

    TP_STRUCT__entry(
        __field(__u64, gpa)
    ),

    TP_fast_assign(
        __entry->gpa = ((u64)table_gfn << PAGE_SHIFT)
                + index * size;
        ),

    TP_printk("gpa %llx", __entry->gpa)
);

/* We set a pte accessed bit */
DEFINE_EVENT(kvm_mmu_set_bit_class, kvm_mmu_set_accessed_bit,

    TP_PROTO(unsigned long table_gfn, unsigned index, unsigned size),

    TP_ARGS(table_gfn, index, size)
);

/* We set a pte dirty bit */
DEFINE_EVENT(kvm_mmu_set_bit_class, kvm_mmu_set_dirty_bit,

    TP_PROTO(unsigned long table_gfn, unsigned index, unsigned size),

    TP_ARGS(table_gfn, index, size)
);

TRACE_EVENT(
    kvm_mmu_walker_error,
    TP_PROTO(u32 pferr),
    TP_ARGS(pferr),

    TP_STRUCT__entry(
        __field(__u32, pferr)
        ),

    TP_fast_assign(
        __entry->pferr = pferr;
        ),

    TP_printk("pferr %x %s", __entry->pferr,
          __print_flags(__entry->pferr, "|", kvm_mmu_trace_pferr_flags))
);

TRACE_EVENT(
    kvm_mmu_get_page,
    TP_PROTO(struct kvm_mmu_page *sp, bool created),
    TP_ARGS(sp, created),

    TP_STRUCT__entry(
        KVM_MMU_PAGE_FIELDS
        __field(bool, created)
        ),

    TP_fast_assign(
        KVM_MMU_PAGE_ASSIGN(sp)
        __entry->created = created;
        ),

    TP_printk("%s %s", KVM_MMU_PAGE_PRINTK(),
          __entry->created ? "new" : "existing")
);

DECLARE_EVENT_CLASS(kvm_mmu_page_class,

    TP_PROTO(struct kvm_mmu_page *sp),
    TP_ARGS(sp),

    TP_STRUCT__entry(
        KVM_MMU_PAGE_FIELDS
    ),

    TP_fast_assign(
        KVM_MMU_PAGE_ASSIGN(sp)
    ),

    TP_printk("%s", KVM_MMU_PAGE_PRINTK())
);

DEFINE_EVENT(kvm_mmu_page_class, kvm_mmu_sync_page,
    TP_PROTO(struct kvm_mmu_page *sp),

    TP_ARGS(sp)
);

DEFINE_EVENT(kvm_mmu_page_class, kvm_mmu_unsync_page,
    TP_PROTO(struct kvm_mmu_page *sp),

    TP_ARGS(sp)
);

DEFINE_EVENT(kvm_mmu_page_class, kvm_mmu_prepare_zap_page,
    TP_PROTO(struct kvm_mmu_page *sp),

    TP_ARGS(sp)
);

DEFINE_EVENT(kvm_mmu_page_class, kvm_mmu_delay_free_pages,
    TP_PROTO(struct kvm_mmu_page *sp),

    TP_ARGS(sp)
);

TRACE_EVENT(
    mark_mmio_spte,
    TP_PROTO(u64 *sptep, gfn_t gfn, unsigned access),
    TP_ARGS(sptep, gfn, access),

    TP_STRUCT__entry(
        __field(void *, sptep)
        __field(gfn_t, gfn)
        __field(unsigned, access)
    ),

    TP_fast_assign(
        __entry->sptep = sptep;
        __entry->gfn = gfn;
        __entry->access = access;
    ),

    TP_printk("sptep:%p gfn %llx access %x", __entry->sptep, __entry->gfn,
          __entry->access)
);

TRACE_EVENT(
    handle_mmio_page_fault,
    TP_PROTO(u64 addr, gfn_t gfn, unsigned access),
    TP_ARGS(addr, gfn, access),

    TP_STRUCT__entry(
        __field(u64, addr)
        __field(gfn_t, gfn)
        __field(unsigned, access)
    ),

    TP_fast_assign(
        __entry->addr = addr;
        __entry->gfn = gfn;
        __entry->access = access;
    ),

    TP_printk("addr:%llx gfn %llx access %x", __entry->addr, __entry->gfn,
          __entry->access)
);

#define __spte_satisfied(__spte)                \
    (__entry->retry && is_writable_pte(__entry->__spte))

TRACE_EVENT(
    fast_page_fault,
    TP_PROTO(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code,
         u64 *sptep, u64 old_spte, bool retry),
    TP_ARGS(vcpu, gva, error_code, sptep, old_spte, retry),

    TP_STRUCT__entry(
        __field(int, vcpu_id)
        __field(gva_t, gva)
        __field(u32, error_code)
        __field(u64 *, sptep)
        __field(u64, old_spte)
        __field(u64, new_spte)
        __field(bool, retry)
    ),

    TP_fast_assign(
        __entry->vcpu_id = vcpu->vcpu_id;
        __entry->gva = gva;
        __entry->error_code = error_code;
        __entry->sptep = sptep;
        __entry->old_spte = old_spte;
        __entry->new_spte = *sptep;
        __entry->retry = retry;
    ),

    TP_printk("vcpu %d gva %lx error_code %s sptep %p old %#llx"
          " new %llx spurious %d fixed %d", __entry->vcpu_id,
          __entry->gva, __print_flags(__entry->error_code, "|",
          kvm_mmu_trace_pferr_flags), __entry->sptep,
          __entry->old_spte, __entry->new_spte,
          __spte_satisfied(old_spte), __spte_satisfied(new_spte)
    )
);
#endif /* _TRACE_KVMMMU_H */

#undef TRACE_INCLUDE_PATH
#define TRACE_INCLUDE_PATH .
#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_FILE mmutrace

/* This part must be outside protection */
#include <trace/define_trace.h>