arm64: mm: Reserve enough pages for the initial ID map

[linux-2.6-microblaze.git] / arch / arm64 / include / asm / kernel-pgtable.h

diff --git a/arch/arm64/include/asm/kernel-pgtable.h b/arch/arm64/include/asm/kernel-pgtable.h
index 02e59fa..32d14f4 100644 (file)
--- a/arch/arm64/include/asm/kernel-pgtable.h
+++ b/arch/arm64/include/asm/kernel-pgtable.h
@@ -64,28 +64,28 @@
 #define EARLY_KASLR    (0)
 #endif
 
-#define EARLY_ENTRIES(vstart, vend, shift) \
-       ((((vend) - 1) >> (shift)) - ((vstart) >> (shift)) + 1 + EARLY_KASLR)
+#define EARLY_ENTRIES(vstart, vend, shift, add) \
+       ((((vend) - 1) >> (shift)) - ((vstart) >> (shift)) + 1 + add)
 
-#define EARLY_PGDS(vstart, vend) (EARLY_ENTRIES(vstart, vend, PGDIR_SHIFT))
+#define EARLY_PGDS(vstart, vend, add) (EARLY_ENTRIES(vstart, vend, PGDIR_SHIFT, add))
 
 #if SWAPPER_PGTABLE_LEVELS > 3
-#define EARLY_PUDS(vstart, vend) (EARLY_ENTRIES(vstart, vend, PUD_SHIFT))
+#define EARLY_PUDS(vstart, vend, add) (EARLY_ENTRIES(vstart, vend, PUD_SHIFT, add))
 #else
-#define EARLY_PUDS(vstart, vend) (0)
+#define EARLY_PUDS(vstart, vend, add) (0)
 #endif
 
 #if SWAPPER_PGTABLE_LEVELS > 2
-#define EARLY_PMDS(vstart, vend) (EARLY_ENTRIES(vstart, vend, SWAPPER_TABLE_SHIFT))
+#define EARLY_PMDS(vstart, vend, add) (EARLY_ENTRIES(vstart, vend, SWAPPER_TABLE_SHIFT, add))
 #else
-#define EARLY_PMDS(vstart, vend) (0)
+#define EARLY_PMDS(vstart, vend, add) (0)
 #endif
 
-#define EARLY_PAGES(vstart, vend) ( 1                  /* PGDIR page */                                \
-                       + EARLY_PGDS((vstart), (vend))  /* each PGDIR needs a next level page table */  \
-                       + EARLY_PUDS((vstart), (vend))  /* each PUD needs a next level page table */    \
-                       + EARLY_PMDS((vstart), (vend))) /* each PMD needs a next level page table */
-#define INIT_DIR_SIZE (PAGE_SIZE * EARLY_PAGES(KIMAGE_VADDR, _end))
+#define EARLY_PAGES(vstart, vend, add) ( 1                     /* PGDIR page */                                \
+                       + EARLY_PGDS((vstart), (vend), add)     /* each PGDIR needs a next level page table */  \
+                       + EARLY_PUDS((vstart), (vend), add)     /* each PUD needs a next level page table */    \
+                       + EARLY_PMDS((vstart), (vend), add))    /* each PMD needs a next level page table */
+#define INIT_DIR_SIZE (PAGE_SIZE * EARLY_PAGES(KIMAGE_VADDR, _end, EARLY_KASLR))
 
 /* the initial ID map may need two extra pages if it needs to be extended */
 #if VA_BITS < 48
@@ -93,7 +93,7 @@
 #else
 #define INIT_IDMAP_DIR_SIZE    (INIT_IDMAP_DIR_PAGES * PAGE_SIZE)
 #endif
-#define INIT_IDMAP_DIR_PAGES   EARLY_PAGES(KIMAGE_VADDR, _end + MAX_FDT_SIZE + SWAPPER_BLOCK_SIZE)
+#define INIT_IDMAP_DIR_PAGES   EARLY_PAGES(KIMAGE_VADDR, _end + MAX_FDT_SIZE + SWAPPER_BLOCK_SIZE, 1)
 
 /* Initial memory map size */
 #if ARM64_KERNEL_USES_PMD_MAPS