xen/trace: add xen_pgd_(un)pin tracepoints

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

2 files changed, 28 insertions, 0 deletions

diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index f2160997287..5dfa90a7ad1 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -885,6 +885,8 @@ static int xen_pin_page(struct mm_struct *mm, struct page *page,
    read-only, and can be pinned. */
 static void __xen_pgd_pin(struct mm_struct *mm, pgd_t *pgd)
 {
+        trace_xen_mmu_pgd_pin(mm, pgd);
+
         xen_mc_batch();
 
         if (__xen_pgd_walk(mm, pgd, xen_pin_page, USER_LIMIT)) {
@@ -1010,6 +1012,8 @@ static int xen_unpin_page(struct mm_struct *mm, struct page *page,
 /* Release a pagetables pages back as normal RW */
 static void __xen_pgd_unpin(struct mm_struct *mm, pgd_t *pgd)
 {
+        trace_xen_mmu_pgd_unpin(mm, pgd);
+
         xen_mc_batch();
 
         xen_do_pin(MMUEXT_UNPIN_TABLE, PFN_DOWN(__pa(pgd)));
diff --git a/include/trace/events/xen.h b/include/trace/events/xen.h
index f46fdb4afb8..0b6056de2b0 100644
--- a/include/trace/events/xen.h
+++ b/include/trace/events/xen.h
@@ -381,6 +381,30 @@ TRACE_EVENT(xen_mmu_release_ptpage,
                       __entry->pinned ? "" : "un")
         );
 
+TRACE_EVENT(xen_mmu_pgd_pin,
+            TP_PROTO(struct mm_struct *mm, pgd_t *pgd),
+            TP_ARGS(mm, pgd),
+            TP_STRUCT__entry(
+                    __field(struct mm_struct *, mm)
+                    __field(pgd_t *, pgd)
+                    ),
+            TP_fast_assign(__entry->mm = mm;
+                           __entry->pgd = pgd),
+            TP_printk("mm %p pgd %p", __entry->mm, __entry->pgd)
+        );
+
+TRACE_EVENT(xen_mmu_pgd_unpin,
+            TP_PROTO(struct mm_struct *mm, pgd_t *pgd),
+            TP_ARGS(mm, pgd),
+            TP_STRUCT__entry(
+                    __field(struct mm_struct *, mm)
+                    __field(pgd_t *, pgd)
+                    ),
+            TP_fast_assign(__entry->mm = mm;
+                           __entry->pgd = pgd),
+            TP_printk("mm %p pgd %p", __entry->mm, __entry->pgd)
+        );
+
 #endif /*  _TRACE_XEN_H */
 
 /* This part must be outside protection */