From: Mark Brown <broonie@kernel.org>
To: Thiago Jung Bauermann <thiago.bauermann@linaro.org>
Cc: 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>,
"H.J. Lu" <hjl.tools@gmail.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Florian Weimer <fweimer@redhat.com>,
Christian Brauner <brauner@kernel.org>,
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
Subject: Re: [PATCH v8 20/38] arm64/gcs: Ensure that new threads have a GCS
Date: Wed, 21 Feb 2024 18:16:36 +0000 [thread overview]
Message-ID: <9400cfc3-0e87-4abd-afbc-172736d77a1b@sirena.org.uk> (raw)
In-Reply-To: <874je399ld.fsf@linaro.org>
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On Mon, Feb 19, 2024 at 11:02:22PM -0300, Thiago Jung Bauermann wrote:
> Mark Brown <broonie@kernel.org> writes:
> > + gcspr_el0 = addr + size - (2 * sizeof(u64));
> > + if (!gcs_consume_token(tsk, gcspr_el0)) {
> Should this code validate the end of stack marker? Or doesn't it matter
> whether the marker is correct or not?
I don't think we specifically care, we're just looking for a token here.
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next prev parent reply other threads:[~2024-02-21 18:16 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-03 12:25 [PATCH v8 00/38] arm64/gcs: Provide support for GCS in userspace Mark Brown
2024-02-03 12:25 ` [PATCH v8 01/38] arm64/mm: Restructure arch_validate_flags() for extensibility Mark Brown
2024-02-03 12:25 ` [PATCH v8 02/38] prctl: arch-agnostic prctl for shadow stack Mark Brown
2024-02-03 12:25 ` [PATCH v8 03/38] mman: Add map_shadow_stack() flags Mark Brown
2024-02-03 12:25 ` [PATCH v8 04/38] arm64: Document boot requirements for Guarded Control Stacks Mark Brown
2024-02-03 12:25 ` [PATCH v8 05/38] arm64/gcs: Document the ABI " Mark Brown
2024-02-03 12:25 ` [PATCH v8 06/38] arm64/sysreg: Add definitions for architected GCS caps Mark Brown
2024-02-03 12:25 ` [PATCH v8 07/38] arm64/gcs: Add manual encodings of GCS instructions Mark Brown
2024-02-03 12:25 ` [PATCH v8 08/38] arm64/gcs: Provide put_user_gcs() Mark Brown
2024-02-03 12:25 ` [PATCH v8 09/38] arm64/cpufeature: Runtime detection of Guarded Control Stack (GCS) Mark Brown
2024-02-03 12:25 ` [PATCH v8 10/38] arm64/mm: Allocate PIE slots for EL0 guarded control stack Mark Brown
2024-02-03 12:25 ` [PATCH v8 11/38] mm: Define VM_SHADOW_STACK for arm64 when we support GCS Mark Brown
2024-02-03 12:25 ` [PATCH v8 12/38] arm64/mm: Map pages for guarded control stack Mark Brown
2024-02-03 12:25 ` [PATCH v8 13/38] KVM: arm64: Manage GCS registers for guests Mark Brown
2024-02-05 9:46 ` Marc Zyngier
2024-02-05 12:35 ` Mark Brown
2024-02-05 15:34 ` Marc Zyngier
2024-02-05 16:58 ` Mark Brown
2024-02-03 12:25 ` [PATCH v8 14/38] arm64/gcs: Allow GCS usage at EL0 and EL1 Mark Brown
2024-02-03 12:25 ` [PATCH v8 15/38] arm64/idreg: Add overrride for GCS Mark Brown
2024-02-03 12:25 ` [PATCH v8 16/38] arm64/hwcap: Add hwcap " Mark Brown
2024-02-03 12:25 ` [PATCH v8 17/38] arm64/traps: Handle GCS exceptions Mark Brown
2024-02-03 12:25 ` [PATCH v8 18/38] arm64/mm: Handle GCS data aborts Mark Brown
2024-02-03 12:25 ` [PATCH v8 19/38] arm64/gcs: Context switch GCS state for EL0 Mark Brown
2024-02-03 12:25 ` [PATCH v8 20/38] arm64/gcs: Ensure that new threads have a GCS Mark Brown
2024-02-20 2:02 ` Thiago Jung Bauermann
2024-02-21 18:16 ` Mark Brown [this message]
2024-02-03 12:25 ` [PATCH v8 21/38] arm64/gcs: Implement shadow stack prctl() interface Mark Brown
2024-02-03 12:25 ` [PATCH v8 22/38] arm64/mm: Implement map_shadow_stack() Mark Brown
2024-02-03 12:25 ` [PATCH v8 23/38] arm64/signal: Set up and restore the GCS context for signal handlers Mark Brown
2024-02-20 2:03 ` Thiago Jung Bauermann
2024-02-03 12:25 ` [PATCH v8 24/38] arm64/signal: Expose GCS state in signal frames Mark Brown
2024-02-03 12:25 ` [PATCH v8 25/38] arm64/ptrace: Expose GCS via ptrace and core files Mark Brown
2024-02-03 12:25 ` [PATCH v8 26/38] arm64: Add Kconfig for Guarded Control Stack (GCS) Mark Brown
2024-02-03 12:25 ` [PATCH v8 27/38] kselftest/arm64: Verify the GCS hwcap Mark Brown
2024-02-03 12:25 ` [PATCH v8 28/38] kselftest/arm64: Add GCS as a detected feature in the signal tests Mark Brown
2024-02-03 12:25 ` [PATCH v8 29/38] kselftest/arm64: Add framework support for GCS to signal handling tests Mark Brown
2024-02-03 12:25 ` [PATCH v8 30/38] kselftest/arm64: Allow signals tests to specify an expected si_code Mark Brown
2024-02-03 12:25 ` [PATCH v8 31/38] kselftest/arm64: Always run signals tests with GCS enabled Mark Brown
2024-02-03 12:25 ` [PATCH v8 32/38] kselftest/arm64: Add very basic GCS test program Mark Brown
2024-02-03 12:25 ` [PATCH v8 33/38] kselftest/arm64: Add a GCS test program built with the system libc Mark Brown
2024-02-20 2:15 ` Thiago Jung Bauermann
2024-02-21 19:20 ` Mark Brown
2024-02-22 19:11 ` Mark Brown
2024-02-23 2:24 ` Thiago Jung Bauermann
2024-02-27 16:14 ` Mark Brown
2024-02-27 19:08 ` Thiago Jung Bauermann
2024-02-29 21:45 ` Mark Brown
2024-02-29 22:13 ` Thiago Jung Bauermann
2024-02-03 12:26 ` [PATCH v8 34/38] kselftest/arm64: Add test coverage for GCS mode locking Mark Brown
2024-02-03 12:26 ` [PATCH v8 35/38] selftests/arm64: Add GCS signal tests Mark Brown
2024-02-20 2:17 ` Thiago Jung Bauermann
2024-02-03 12:26 ` [PATCH v8 36/38] kselftest/arm64: Add a GCS stress test Mark Brown
2024-02-03 12:26 ` [PATCH v8 37/38] kselftest/arm64: Enable GCS for the FP stress tests Mark Brown
2024-02-03 12:26 ` [PATCH v8 38/38] kselftest: Provide shadow stack enable helpers for arm64 Mark Brown
2024-02-20 2:00 ` [PATCH v8 00/38] arm64/gcs: Provide support for GCS in userspace Thiago Jung Bauermann
2024-02-20 16:36 ` Stefan O'Rear
2024-02-20 18:41 ` Edgecombe, Rick P
2024-02-20 18:57 ` [musl] " Rich Felker
2024-02-20 23:30 ` Edgecombe, Rick P
2024-02-20 23:54 ` dalias
2024-02-21 0:35 ` Edgecombe, Rick P
2024-02-21 0:44 ` Mark Brown
2024-02-21 1:27 ` dalias
2024-02-21 2:11 ` Edgecombe, Rick P
2024-02-21 4:18 ` Edgecombe, Rick P
2024-02-21 13:53 ` Mark Brown
2024-02-21 14:58 ` dalias
2024-02-21 17:36 ` Mark Brown
2024-02-21 17:57 ` dalias
2024-02-21 18:12 ` Edgecombe, Rick P
2024-02-21 18:30 ` dalias
2024-02-21 18:53 ` Edgecombe, Rick P
2024-02-21 19:06 ` dalias
2024-02-21 19:22 ` Edgecombe, Rick P
2024-02-21 20:18 ` H.J. Lu
2024-02-21 20:25 ` H.J. Lu
2024-02-21 21:12 ` H.J. Lu
2024-02-21 20:18 ` dalias
2024-02-22 13:57 ` Mark Brown
2024-02-21 18:32 ` Mark Brown
2024-02-21 19:10 ` dalias
2024-03-02 14:57 ` Szabolcs Nagy
2024-03-02 15:05 ` H.J. Lu
2024-03-14 14:03 ` Mark Brown
2024-02-20 23:59 ` Stefan O'Rear
2024-02-21 0:40 ` Mark Brown
2024-02-21 4:30 ` Edgecombe, Rick P
2024-02-20 20:14 ` Mark Brown
2024-02-20 23:30 ` Edgecombe, Rick P
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