arm64: ptdump: Indicate whether memory should be faulting

With CONFIG_DEBUG_PAGEALLOC, pages do not have the valid bit
set when free in the buddy allocator. Add an indiciation to
the page table dumping code that the valid bit is not set,
'F' for fault, to make this easier to understand.

Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Laura Abbott <labbott@fedoraproject.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
(cherry picked from commit d7e9d59494a9a5d83274f5af2148b82ca22dff3f)
Signed-off-by: Alex Shi <alex.shi@linaro.org>

diff --git a/arch/arm64/mm/dump.c b/arch/arm64/mm/dump.c
index 5a22a119a74c87b4b5b54e114701b3c6eed233e6..f381ac991de7d99f3e8b30ff5a83b11201392ecf 100644 (file)
--- a/arch/arm64/mm/dump.c
+++ b/arch/arm64/mm/dump.c
@@ -90,6 +90,11 @@ struct prot_bits {
 
 static const struct prot_bits pte_bits[] = {
        {
+               .mask   = PTE_VALID,
+               .val    = PTE_VALID,
+               .set    = " ",
+               .clear  = "F",
+       }, {
                .mask   = PTE_USER,
                .val    = PTE_USER,
                .set    = "USR",