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 v10 11/13] arm64: mm: Display guarded pages in ptdump
Date: Mon, 16 Mar 2020 16:50:53 +0000 [thread overview]
Message-ID: <20200316165055.31179-12-broonie@kernel.org> (raw)
In-Reply-To: <20200316165055.31179-1-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: 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
next prev parent reply other threads:[~2020-03-16 16:51 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-16 16:50 [PATCH v10 00/13] arm64: Branch Target Identification support Mark Brown
2020-03-16 16:50 ` [PATCH v10 01/13] ELF: UAPI and Kconfig additions for ELF program properties Mark Brown
2020-03-16 16:50 ` [PATCH v10 02/13] ELF: Add ELF program property parsing support Mark Brown
2020-03-16 16:50 ` [PATCH v10 03/13] arm64: Basic Branch Target Identification support Mark Brown
2020-03-16 16:50 ` [PATCH v10 04/13] elf: Allow arch to tweak initial mmap prot flags Mark Brown
2020-03-16 16:50 ` [PATCH v10 05/13] arm64: elf: Enable BTI at exec based on ELF program properties Mark Brown
2020-03-16 16:50 ` [PATCH v10 06/13] arm64: BTI: Decode BYTPE bits when printing PSTATE Mark Brown
2020-03-16 16:50 ` [PATCH v10 07/13] arm64: unify native/compat instruction skipping Mark Brown
2020-03-16 16:50 ` [PATCH v10 08/13] arm64: traps: Shuffle code to eliminate forward declarations Mark Brown
2020-03-16 16:50 ` [PATCH v10 09/13] arm64: BTI: Reset BTYPE when skipping emulated instructions Mark Brown
2020-03-16 16:50 ` [PATCH v10 10/13] KVM: " Mark Brown
2020-03-16 16:50 ` Mark Brown [this message]
2020-03-16 16:50 ` [PATCH v10 12/13] mm: smaps: Report arm64 guarded pages in smaps Mark Brown
2020-03-16 16:50 ` [PATCH v10 13/13] arm64: BTI: Add Kconfig entry for userspace BTI Mark Brown
2020-03-17 18:49 ` [PATCH v10 00/13] arm64: Branch Target Identification support Catalin Marinas
2020-03-20 17:39 ` Szabolcs Nagy
2020-03-23 12:21 ` Catalin Marinas
2020-03-23 13:24 ` Mark Brown
2020-03-23 13:57 ` Mark Rutland
2020-03-23 14:39 ` Catalin Marinas
2020-03-23 14:55 ` Mark Rutland
2020-03-23 15:32 ` Mark Brown
2020-03-24 15:43 ` Szabolcs Nagy
2020-03-23 15:02 ` Mark Rutland
2020-04-22 15:44 ` Mark Brown
2020-04-22 16:29 ` Catalin Marinas
2020-04-28 13:28 ` Will Deacon
2020-04-28 15:12 ` Mark Brown
2020-04-28 15:18 ` Will Deacon
2020-04-28 15:58 ` Mark Brown
2020-04-28 16:01 ` Will Deacon
2020-04-30 21:26 ` Will Deacon
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