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From: Mark Brown <broonie@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>
Cc: "Paul Elliott" <paul.elliott@arm.com>,
	"Peter Zijlstra" <peterz@infradead.org>,
	"Andrew Jones" <drjones@redhat.com>,
	"Amit Kachhap" <amit.kachhap@arm.com>,
	"Vincenzo Frascino" <vincenzo.frascino@arm.com>,
	linux-arch@vger.kernel.org, "Marc Zyngier" <maz@kernel.org>,
	"Eugene Syromiatnikov" <esyr@redhat.com>,
	"Szabolcs Nagy" <szabolcs.nagy@arm.com>,
	"H.J. Lu" <hjl.tools@gmail.com>,
	"Yu-cheng Yu" <yu-cheng.yu@intel.com>,
	"Kees Cook" <keescook@chromium.org>,
	"Arnd Bergmann" <arnd@arndb.de>, "Jann Horn" <jannh@google.com>,
	"Richard Henderson" <richard.henderson@linaro.org>,
	"Kristina Martšenko" <kristina.martsenko@arm.com>,
	"Mark Brown" <broonie@kernel.org>,
	"Thomas Gleixner" <tglx@linutronix.de>,
	linux-arm-kernel@lists.infradead.org,
	"Florian Weimer" <fweimer@redhat.com>,
	linux-kernel@vger.kernel.org, "Sudakshina Das" <sudi.das@arm.com>
Subject: [PATCH v4 12/12] arm64: mm: Display guarded pages in ptdump
Date: Wed, 11 Dec 2019 15:42:06 +0000	[thread overview]
Message-ID: <20191211154206.46260-13-broonie@kernel.org> (raw)
In-Reply-To: <20191211154206.46260-1-broonie@kernel.org>

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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  parent reply	other threads:[~2019-12-11 15:46 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-11 15:41 [PATCH v4 00/12] arm64: ARMv8.5-A: Branch Target Identification support Mark Brown
2019-12-11 15:41 ` [PATCH v4 01/12] ELF: UAPI and Kconfig additions for ELF program properties Mark Brown
2020-01-14 15:03   ` Catalin Marinas
2019-12-11 15:41 ` [PATCH v4 02/12] ELF: Add ELF program property parsing support Mark Brown
2020-01-14 16:34   ` Catalin Marinas
2020-01-14 17:28     ` Mark Brown
2019-12-11 15:41 ` [PATCH v4 03/12] mm: Reserve asm-generic prot flag 0x10 for arch use Mark Brown
2019-12-12 10:48   ` Catalin Marinas
2019-12-12 16:16     ` Mark Brown
2019-12-11 15:41 ` [PATCH v4 04/12] arm64: Basic Branch Target Identification support Mark Brown
2020-01-10 18:28   ` Catalin Marinas
2020-01-13 14:00     ` Mark Brown
2019-12-11 15:41 ` [PATCH v4 05/12] elf: Allow arch to tweak initial mmap prot flags Mark Brown
2020-01-14 16:38   ` Catalin Marinas
2019-12-11 15:42 ` [PATCH v4 06/12] arm64: elf: Enable BTI at exec based on ELF program properties Mark Brown
2020-01-14 17:33   ` Catalin Marinas
2019-12-11 15:42 ` [PATCH v4 07/12] arm64: BTI: Decode BYTPE bits when printing PSTATE Mark Brown
2020-01-14 17:34   ` Catalin Marinas
2019-12-11 15:42 ` [PATCH v4 08/12] arm64: unify native/compat instruction skipping Mark Brown
2020-01-13 16:43   ` Catalin Marinas
2019-12-11 15:42 ` [PATCH v4 09/12] arm64: traps: Shuffle code to eliminate forward declarations Mark Brown
2020-01-14 17:35   ` Catalin Marinas
2019-12-11 15:42 ` [PATCH v4 10/12] arm64: BTI: Reset BTYPE when skipping emulated instructions Mark Brown
2020-01-14 17:36   ` Catalin Marinas
2019-12-11 15:42 ` [PATCH v4 11/12] KVM: " Mark Brown
2020-01-14 17:36   ` Catalin Marinas
2019-12-11 15:42 ` Mark Brown [this message]
2020-01-14 17:37   ` [PATCH v4 12/12] arm64: mm: Display guarded pages in ptdump Catalin Marinas

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