KVM: Trace shadow page lifecycle
Create, sync, unsync, zap.
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/x86/kvm/mmutrace.h b/arch/x86/kvm/mmutrace.h
index 1367f82..3e4a5c6 100644
--- a/arch/x86/kvm/mmutrace.h
+++ b/arch/x86/kvm/mmutrace.h
@@ -2,12 +2,48 @@
#define _TRACE_KVMMMU_H
#include <linux/tracepoint.h>
+#include <linux/ftrace_event.h>
#undef TRACE_SYSTEM
#define TRACE_SYSTEM kvmmmu
#define TRACE_INCLUDE_PATH .
#define TRACE_INCLUDE_FILE mmutrace
+#define KVM_MMU_PAGE_FIELDS \
+ __field(__u64, gfn) \
+ __field(__u32, role) \
+ __field(__u32, root_count) \
+ __field(__u32, 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/%u q%u%s %s%s %spge" \
+ " %snxe root %u %s%c", \
+ __entry->gfn, role.level, role.glevels, \
+ role.quadrant, \
+ role.direct ? " direct" : "", \
+ access_str[role.access], \
+ role.invalid ? " invalid" : "", \
+ role.cr4_pge ? "" : "!", \
+ 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" }, \
@@ -111,6 +147,73 @@
__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")
+);
+
+TRACE_EVENT(
+ kvm_mmu_sync_page,
+ 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())
+);
+
+TRACE_EVENT(
+ kvm_mmu_unsync_page,
+ 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())
+);
+
+TRACE_EVENT(
+ kvm_mmu_zap_page,
+ 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())
+);
+
#endif /* _TRACE_KVMMMU_H */
/* This part must be outside protection */