From: Mark Brown <broonie@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Jonathan Corbet <corbet@lwn.net>,
Andrew Morton <akpm@linux-foundation.org>,
Marc Zyngier <maz@kernel.org>,
Oliver Upton <oliver.upton@linux.dev>,
James Morse <james.morse@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Arnd Bergmann <arnd@arndb.de>, Oleg Nesterov <oleg@redhat.com>,
Eric Biederman <ebiederm@xmission.com>,
Kees Cook <keescook@chromium.org>, Shuah Khan <shuah@kernel.org>,
"Rick P. Edgecombe" <rick.p.edgecombe@intel.com>,
Deepak Gupta <debug@rivosinc.com>,
Ard Biesheuvel <ardb@kernel.org>,
Szabolcs Nagy <Szabolcs.Nagy@arm.com>
Cc: "H.J. Lu" <hjl.tools@gmail.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org,
kvmarm@lists.linux.dev, linux-fsdevel@vger.kernel.org,
linux-arch@vger.kernel.org, linux-mm@kvack.org,
linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-riscv@lists.infradead.org, Mark Brown <broonie@kernel.org>
Subject: [PATCH v2 25/35] arm64: Add Kconfig for Guarded Control Stack (GCS)
Date: Mon, 24 Jul 2023 13:46:12 +0100 [thread overview]
Message-ID: <20230724-arm64-gcs-v2-25-dc2c1d44c2eb@kernel.org> (raw)
In-Reply-To: <20230724-arm64-gcs-v2-0-dc2c1d44c2eb@kernel.org>
Provide a Kconfig option allowing the user to select if GCS support is
built into the kernel.
Signed-off-by: Mark Brown <broonie@kernel.org>
---
arch/arm64/Kconfig | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index a2511b30d0f6..b5ef1a698770 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -2093,6 +2093,25 @@ config ARM64_EPAN
if the cpu does not implement the feature.
endmenu # "ARMv8.7 architectural features"
+menu "v9.4 architectural features"
+
+config ARM64_GCS
+ bool "Enable support for Guarded Control Stack (GCS)"
+ default y
+ select ARCH_USES_HIGH_VMA_FLAGS
+ help
+ Guarded Control Stack (GCS) provides support for a separate
+ stack with restricted access which contains only return
+ addresses. This can be used to harden against some attacks
+ by comparing return address used by the program with what is
+ stored in the GCS, and may also be used to efficiently obtain
+ the call stack for applications such as profiling.
+
+ The feature is detected at runtime, and will remain disabled
+ if the system does not implement the feature.
+
+endmenu # "v9.4 architectural features"
+
config ARM64_SVE
bool "ARM Scalable Vector Extension support"
default y
--
2.30.2
next prev parent reply other threads:[~2023-07-24 12:49 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-24 12:45 [PATCH v2 00/35] arm64/gcs: Provide support for GCS in userspace Mark Brown
2023-07-24 12:45 ` [PATCH v2 01/35] prctl: arch-agnostic prctl for shadow stack Mark Brown
2023-07-24 12:45 ` [PATCH v2 02/35] arm64: Document boot requirements for Guarded Control Stacks Mark Brown
2023-07-24 12:45 ` [PATCH v2 03/35] arm64/gcs: Document the ABI " Mark Brown
2023-07-24 12:45 ` [PATCH v2 04/35] arm64/sysreg: Add new system registers for GCS Mark Brown
2023-07-24 12:45 ` [PATCH v2 05/35] arm64/sysreg: Add definitions for architected GCS caps Mark Brown
2023-07-24 12:45 ` [PATCH v2 06/35] arm64/gcs: Add manual encodings of GCS instructions Mark Brown
2023-07-24 12:45 ` [PATCH v2 07/35] arm64/gcs: Provide copy_to_user_gcs() Mark Brown
2023-07-24 12:45 ` [PATCH v2 08/35] arm64/cpufeature: Runtime detection of Guarded Control Stack (GCS) Mark Brown
2023-07-24 12:45 ` [PATCH v2 09/35] arm64/mm: Allocate PIE slots for EL0 guarded control stack Mark Brown
2023-07-24 12:45 ` [PATCH v2 10/35] mm: Define VM_SHADOW_STACK for arm64 when we support GCS Mark Brown
2023-07-24 12:45 ` [PATCH v2 11/35] arm64/mm: Map pages for guarded control stack Mark Brown
2023-07-24 12:45 ` [PATCH v2 12/35] KVM: arm64: Manage GCS registers for guests Mark Brown
2023-07-24 12:46 ` [PATCH v2 13/35] arm64/el2_setup: Allow GCS usage at EL0 and EL1 Mark Brown
2023-07-24 12:46 ` [PATCH v2 14/35] arm64/idreg: Add overrride for GCS Mark Brown
2023-07-24 12:46 ` [PATCH v2 15/35] arm64/hwcap: Add hwcap " Mark Brown
2023-07-24 12:46 ` [PATCH v2 16/35] arm64/traps: Handle GCS exceptions Mark Brown
2023-07-24 12:46 ` [PATCH v2 17/35] arm64/mm: Handle GCS data aborts Mark Brown
2023-07-24 12:46 ` [PATCH v2 18/35] arm64/gcs: Context switch GCS registers for EL0 Mark Brown
2023-07-24 12:46 ` [PATCH v2 19/35] arm64/gcs: Allocate a new GCS for threads with GCS enabled Mark Brown
2023-07-24 12:46 ` [PATCH v2 20/35] arm64/gcs: Implement shadow stack prctl() interface Mark Brown
2023-07-24 12:46 ` [PATCH v2 21/35] arm64/mm: Implement map_shadow_stack() Mark Brown
2023-07-24 12:46 ` [PATCH v2 22/35] arm64/signal: Set up and restore the GCS context for signal handlers Mark Brown
2023-07-24 12:46 ` [PATCH v2 23/35] arm64/signal: Expose GCS state in signal frames Mark Brown
2023-07-24 12:46 ` [PATCH v2 24/35] arm64/ptrace: Expose GCS via ptrace and core files Mark Brown
2023-07-24 12:46 ` Mark Brown [this message]
2023-07-24 12:46 ` [PATCH v2 26/35] kselftest/arm64: Verify the GCS hwcap Mark Brown
2023-07-24 12:46 ` [PATCH v2 27/35] kselftest/arm64: Add GCS as a detected feature in the signal tests Mark Brown
2023-07-24 12:46 ` [PATCH v2 28/35] kselftest/arm64: Add framework support for GCS to signal handling tests Mark Brown
2023-07-24 12:46 ` [PATCH v2 29/35] kselftest/arm64: Allow signals tests to specify an expected si_code Mark Brown
2023-07-24 12:46 ` [PATCH v2 30/35] kselftest/arm64: Always run signals tests with GCS enabled Mark Brown
2023-07-24 12:46 ` [PATCH v2 31/35] kselftest/arm64: Add very basic GCS test program Mark Brown
2023-07-24 12:46 ` [PATCH v2 32/35] kselftest/arm64: Add a GCS test program built with the system libc Mark Brown
2023-07-24 12:46 ` [PATCH v2 33/35] kselftest/arm64: Add test coverage for GCS mode locking Mark Brown
2023-07-24 12:46 ` [PATCH v2 34/35] selftests/arm64: Add GCS signal tests Mark Brown
2023-07-24 12:46 ` [PATCH v2 35/35] kselftest/arm64: Enable GCS for the FP stress tests Mark Brown
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