x86: CPA avoid repeated lazy mmu flush
Impact: Flush the lazy MMU only once
Pending mmu updates only need to be flushed once to bring the
in-memory pagetable state up to date.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index f664bc1..8ca0d85 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -575,14 +575,6 @@
address = cpa->vaddr[cpa->curpage];
else
address = *cpa->vaddr;
-
- /*
- * If we're called with lazy mmu updates enabled, the
- * in-memory pte state may be stale. Flush pending updates to
- * bring them up to date.
- */
- arch_flush_lazy_mmu_mode();
-
repeat:
kpte = lookup_address(address, &level);
if (!kpte)
@@ -819,6 +811,13 @@
vm_unmap_aliases();
+ /*
+ * If we're called with lazy mmu updates enabled, the
+ * in-memory pte state may be stale. Flush pending updates to
+ * bring them up to date.
+ */
+ arch_flush_lazy_mmu_mode();
+
cpa.vaddr = addr;
cpa.numpages = numpages;
cpa.mask_set = mask_set;