xen/trace: add ptpage alloc/release 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 43fa777..f216099 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1478,8 +1478,11 @@
static void xen_alloc_ptpage(struct mm_struct *mm, unsigned long pfn, unsigned level)
{
struct page *page = pfn_to_page(pfn);
+ int pinned = PagePinned(virt_to_page(mm->pgd));
+
+ trace_xen_mmu_alloc_ptpage(mm, pfn, level, pinned);
- if (PagePinned(virt_to_page(mm->pgd))) {
+ if (pinned) {
SetPagePinned(page);
if (!PageHighMem(page)) {
@@ -1508,8 +1511,11 @@
static void xen_release_ptpage(unsigned long pfn, unsigned level)
{
struct page *page = pfn_to_page(pfn);
+ bool pinned = PagePinned(page);
- if (PagePinned(page)) {
+ trace_xen_mmu_release_ptpage(pfn, level, pinned);
+
+ if (pinned) {
if (!PageHighMem(page)) {
if (level == PT_PTE && USE_SPLIT_PTLOCKS)
pin_pagetable_pfn(MMUEXT_UNPIN_TABLE, pfn);