arm64: Make the kernel page dump utility aware of the CONT bit

The kernel page dump utility needs to be aware of the CONT bit before
it will break up pages ranges for display.

Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

1 files changed, 17 insertions, 1 deletions

diff --git a/arch/arm64/mm/dump.c b/arch/arm64/mm/dump.c
index f3d6221cd5bd..5a22a119a74c 100644
--- a/arch/arm64/mm/dump.c
+++ b/arch/arm64/mm/dump.c
@@ -67,6 +67,12 @@ static struct addr_marker address_markers[] = {
 	{ -1,			NULL },
 };
 
+/*
+ * The page dumper groups page table entries of the same type into a single
+ * description. It uses pg_state to track the range information while
+ * iterating over the pte entries. When the continuity is broken it then
+ * dumps out a description of the range.
+ */
 struct pg_state {
 	struct seq_file *seq;
 	const struct addr_marker *marker;
@@ -114,6 +120,16 @@ static const struct prot_bits pte_bits[] = {
 		.set	= "NG",
 		.clear	= "  ",
 	}, {
+		.mask	= PTE_CONT,
+		.val	= PTE_CONT,
+		.set	= "CON",
+		.clear	= "   ",
+	}, {
+		.mask	= PTE_TABLE_BIT,
+		.val	= PTE_TABLE_BIT,
+		.set	= "   ",
+		.clear	= "BLK",
+	}, {
 		.mask	= PTE_UXN,
 		.val	= PTE_UXN,
 		.set	= "UXN",
@@ -198,7 +214,7 @@ static void note_page(struct pg_state *st, unsigned long addr, unsigned level,
 		unsigned long delta;
 
 		if (st->current_prot) {
-			seq_printf(st->seq, "0x%16lx-0x%16lx   ",
+			seq_printf(st->seq, "0x%016lx-0x%016lx   ",
 				   st->start_address, addr);
 
 			delta = (addr - st->start_address) >> 10;