Commit de48bb36 authored Mar 16, 2020 by Mark Brown Committed by Catalin Marinas Mar 16, 2020

arm64: mm: Display guarded pages in ptdump



v8.5-BTI introduces the GP field in stage 1 translation tables which
indicates that blocks and pages with it set are guarded pages for which
branch target identification checks should be performed. Decode this
when dumping the page tables to aid debugging.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

parent 30685d78

arch/arm64/mm/dump.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -145,6 +145,11 @@ static const struct prot_bits pte_bits[] = {
		.val = PTE_UXN,
		.set = "UXN",
		.clear = " ",
		}, {
		.mask = PTE_GP,
		.val = PTE_GP,
		.set = "GP",
		.clear = " ",
		}, {
		.mask = PTE_ATTRINDX_MASK,
		.val = PTE_ATTRINDX(MT_DEVICE_nGnRnE),

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