[PATCH 3/5] arm64/ptdump: Test PMD_TYPE_MASK for block mapping

[Anshuman Khandual]

arm64 block mapping requires given page table entry's bits[1:0] to be "01".
But now only bit[1] is checked to be clear, while also implicitly assuming
bit[0] to be set. This modifies ptdump to check both the relevant bits via
the mask PMD_TYPE_MASK and check the resultant value against PMD_TYPE_MASK.

Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Ard Biesheuvel <ardb@xxxxxxxxxx>
Cc: Ryan Roberts <ryan.roberts@xxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
---
 arch/arm64/mm/ptdump.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/mm/ptdump.c b/arch/arm64/mm/ptdump.c
index 264c5f9b97d8..8cec0da4cff2 100644
--- a/arch/arm64/mm/ptdump.c
+++ b/arch/arm64/mm/ptdump.c
@@ -80,10 +80,10 @@ static const struct ptdump_prot_bits pte_bits[] = {
 		.set	= "CON",
 		.clear	= "   ",
 	}, {
-		.mask	= PTE_TABLE_BIT,
-		.val	= PTE_TABLE_BIT,
-		.set	= "   ",
-		.clear	= "BLK",
+		.mask	= PMD_TYPE_MASK,
+		.val	= PMD_TYPE_SECT,
+		.set	= "BLK",
+		.clear	= "   ",
 	}, {
 		.mask	= PTE_UXN,
 		.val	= PTE_UXN,
-- 
2.25.1