From: Mark Brown <broonie@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>
Cc: "Alexander Viro" <viro@zeniv.linux.org.uk>,
"Paul Elliott" <paul.elliott@arm.com>,
"Peter Zijlstra" <peterz@infradead.org>,
"Yu-cheng Yu" <yu-cheng.yu@intel.com>,
"Amit Kachhap" <amit.kachhap@arm.com>,
"Vincenzo Frascino" <vincenzo.frascino@arm.com>,
"Marc Zyngier" <maz@kernel.org>,
"Eugene Syromiatnikov" <esyr@redhat.com>,
"Szabolcs Nagy" <szabolcs.nagy@arm.com>,
"H . J . Lu " <hjl.tools@gmail.com>,
"Andrew Jones" <drjones@redhat.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>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Florian Weimer" <fweimer@redhat.com>,
"Sudakshina Das" <sudi.das@arm.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
linux-fsdevel@vger.kernel.org, "Mark Brown" <broonie@kernel.org>
Subject: [PATCH v5 12/12] arm64: mm: Display guarded pages in ptdump
Date: Wed, 22 Jan 2020 21:21:44 +0000 [thread overview]
Message-ID: <20200122212144.6409-13-broonie@kernel.org> (raw)
In-Reply-To: <20200122212144.6409-1-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>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
---
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
prev parent reply other threads:[~2020-01-22 21:22 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-22 21:21 [PATCH v5 00/12] arm64: ARMv8.5-A: Branch Target Identification support Mark Brown
2020-01-22 21:21 ` [PATCH v5 01/12] ELF: UAPI and Kconfig additions for ELF program properties Mark Brown
2020-01-22 21:21 ` [PATCH v5 02/12] ELF: Add ELF program property parsing support Mark Brown
2020-01-22 21:21 ` [PATCH v5 03/12] mm: Reserve asm-generic prot flag 0x10 for arch use Mark Brown
2020-01-22 21:21 ` [PATCH v5 04/12] arm64: Basic Branch Target Identification support Mark Brown
2020-01-22 21:21 ` [PATCH v5 05/12] elf: Allow arch to tweak initial mmap prot flags Mark Brown
2020-01-22 21:21 ` [PATCH v5 06/12] arm64: elf: Enable BTI at exec based on ELF program properties Mark Brown
2020-01-24 19:12 ` kbuild test robot
2020-01-22 21:21 ` [PATCH v5 07/12] arm64: BTI: Decode BYTPE bits when printing PSTATE Mark Brown
2020-01-22 21:21 ` [PATCH v5 08/12] arm64: unify native/compat instruction skipping Mark Brown
2020-01-22 21:21 ` [PATCH v5 09/12] arm64: traps: Shuffle code to eliminate forward declarations Mark Brown
2020-01-24 23:00 ` kbuild test robot
2020-01-22 21:21 ` [PATCH v5 10/12] arm64: BTI: Reset BTYPE when skipping emulated instructions Mark Brown
2020-01-22 21:21 ` [PATCH v5 11/12] KVM: " Mark Brown
2020-01-22 21:21 ` Mark Brown [this message]
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