Messages in this thread Patch in this message | | | From | Mark Brown <> | Subject | [PATCH v4 12/12] arm64: mm: Display guarded pages in ptdump | Date | Wed, 11 Dec 2019 15:42:06 +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> --- 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 0a920b538a89..880bd5160dc2 100644 --- a/arch/arm64/mm/dump.c +++ b/arch/arm64/mm/dump.c @@ -143,6 +143,11 @@ 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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