Messages in this thread Patch in this message | | | From | Mark Brown <> | Subject | [PATCH v8 11/11] arm64: mm: Display guarded pages in ptdump | Date | Thu, 27 Feb 2020 17:44:17 +0000 |
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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> --- arch/arm64/mm/dump.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/arch/arm64/mm/dump.c b/arch/arm64/mm/dump.c index 860c00ec8bd3..78163b7a7dde 100644 --- a/arch/arm64/mm/dump.c +++ b/arch/arm64/mm/dump.c @@ -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), -- 2.20.1
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