Merge remote-tracking branch 'rt-stable/v4.9-rt' into linux-linaro-lsk-v4.9-rtlsk-v4.9-18.02-rt

Conflicts:
	arch/arm64/mm/init.c

1 files changed, 24 insertions, 1 deletions

diff --git a/arch/x86/include/asm/pgtable_64.h b/arch/x86/include/asm/pgtable_64.h
index 1cc82ece9ac1..ce97c8c6a310 100644
--- a/arch/x86/include/asm/pgtable_64.h
+++ b/arch/x86/include/asm/pgtable_64.h
@@ -106,9 +106,32 @@ static inline void native_pud_clear(pud_t *pud)
 	native_set_pud(pud, native_make_pud(0));
 }
 
+#ifdef CONFIG_PAGE_TABLE_ISOLATION
+extern pgd_t kaiser_set_shadow_pgd(pgd_t *pgdp, pgd_t pgd);
+
+static inline pgd_t *native_get_shadow_pgd(pgd_t *pgdp)
+{
+#ifdef CONFIG_DEBUG_VM
+	/* linux/mmdebug.h may not have been included at this point */
+	BUG_ON(!kaiser_enabled);
+#endif
+	return (pgd_t *)((unsigned long)pgdp | (unsigned long)PAGE_SIZE);
+}
+#else
+static inline pgd_t kaiser_set_shadow_pgd(pgd_t *pgdp, pgd_t pgd)
+{
+	return pgd;
+}
+static inline pgd_t *native_get_shadow_pgd(pgd_t *pgdp)
+{
+	BUILD_BUG_ON(1);
+	return NULL;
+}
+#endif /* CONFIG_PAGE_TABLE_ISOLATION */
+
 static inline void native_set_pgd(pgd_t *pgdp, pgd_t pgd)
 {
-	*pgdp = pgd;
+	*pgdp = kaiser_set_shadow_pgd(pgdp, pgd);
 }
 
 static inline void native_pgd_clear(pgd_t *pgd)