xen/trace: add xen_pgd_(un)pin tracepoints
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index f216099..5dfa90a 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -885,6 +885,8 @@
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 @@
/* 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 f46fdb4..0b6056d 100644
--- a/include/trace/events/xen.h
+++ b/include/trace/events/xen.h
@@ -381,6 +381,30 @@
__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 */