Re: [PATCH v10 08/40] arm64/gcs: Provide put_user_gcs()

[PATCH v10 00/40] arm64/gcs: Provide support for GCS in userspace · Mark Brown <broonie@kernel.org> · 2024-08-01
[PATCH v10 01/40] arm64/mm: Restructure arch_validate_flags() for extensibility · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 01/40] arm64/mm: Restructure arch_validate_flags() for extensibility · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-15
[PATCH v10 02/40] prctl: arch-agnostic prctl for shadow stack · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 02/40] prctl: arch-agnostic prctl for shadow stack · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-15
[PATCH v10 03/40] mman: Add map_shadow_stack() flags · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 03/40] mman: Add map_shadow_stack() flags · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-15
[PATCH v10 04/40] arm64: Document boot requirements for Guarded Control Stacks · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 04/40] arm64: Document boot requirements for Guarded Control Stacks · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-15
Re: [PATCH v10 04/40] arm64: Document boot requirements for Guarded Control Stacks · Mark Brown <broonie@kernel.org> · 2024-08-15
[PATCH v10 05/40] arm64/gcs: Document the ABI for Guarded Control Stacks · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 05/40] arm64/gcs: Document the ABI for Guarded Control Stacks · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-16
Re: [PATCH v10 05/40] arm64/gcs: Document the ABI for Guarded Control Stacks · Mark Brown <broonie@kernel.org> · 2024-08-16
[PATCH v10 06/40] arm64/sysreg: Add definitions for architected GCS caps · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 06/40] arm64/sysreg: Add definitions for architected GCS caps · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-16
[PATCH v10 07/40] arm64/gcs: Add manual encodings of GCS instructions · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 07/40] arm64/gcs: Add manual encodings of GCS instructions · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-16
[PATCH v10 08/40] arm64/gcs: Provide put_user_gcs() · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 08/40] arm64/gcs: Provide put_user_gcs() · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-16
[PATCH v10 09/40] arm64/gcs: Provide basic EL2 setup to allow GCS usage at EL0 and EL1 · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 09/40] arm64/gcs: Provide basic EL2 setup to allow GCS usage at EL0 and EL1 · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-16
[PATCH v10 10/40] arm64/cpufeature: Runtime detection of Guarded Control Stack (GCS) · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 10/40] arm64/cpufeature: Runtime detection of Guarded Control Stack (GCS) · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-16
[PATCH v10 11/40] arm64/mm: Allocate PIE slots for EL0 guarded control stack · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 11/40] arm64/mm: Allocate PIE slots for EL0 guarded control stack · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-16
[PATCH v10 12/40] mm: Define VM_SHADOW_STACK for arm64 when we support GCS · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 12/40] mm: Define VM_SHADOW_STACK for arm64 when we support GCS · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2024-08-15
Re: [PATCH v10 12/40] mm: Define VM_SHADOW_STACK for arm64 when we support GCS · Mark Brown <broonie@kernel.org> · 2024-08-15
Re: [PATCH v10 12/40] mm: Define VM_SHADOW_STACK for arm64 when we support GCS · Mark Brown <broonie@kernel.org> · 2024-08-15
Re: [PATCH v10 12/40] mm: Define VM_SHADOW_STACK for arm64 when we support GCS · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2024-08-15
Re: [PATCH v10 12/40] mm: Define VM_SHADOW_STACK for arm64 when we support GCS · Mark Brown <broonie@kernel.org> · 2024-08-15
Re: [PATCH v10 12/40] mm: Define VM_SHADOW_STACK for arm64 when we support GCS · "Edgecombe, Rick P" <rick.p.edgecombe@intel.com> · 2024-08-16
Re: [PATCH v10 12/40] mm: Define VM_SHADOW_STACK for arm64 when we support GCS · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-19
[PATCH v10 13/40] arm64/mm: Map pages for guarded control stack · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 13/40] arm64/mm: Map pages for guarded control stack · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-19
Re: [PATCH v10 13/40] arm64/mm: Map pages for guarded control stack · Mark Brown <broonie@kernel.org> · 2024-08-19
Re: [PATCH v10 13/40] arm64/mm: Map pages for guarded control stack · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-20
Re: [PATCH v10 13/40] arm64/mm: Map pages for guarded control stack · Mark Brown <broonie@kernel.org> · 2024-08-20
Re: [PATCH v10 13/40] arm64/mm: Map pages for guarded control stack · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-20
[PATCH v10 14/40] KVM: arm64: Manage GCS access and registers for guests · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 14/40] KVM: arm64: Manage GCS access and registers for guests · Marc Zyngier <maz@kernel.org> · 2024-08-16
Re: [PATCH v10 14/40] KVM: arm64: Manage GCS access and registers for guests · Mark Brown <broonie@kernel.org> · 2024-08-16
Re: [PATCH v10 14/40] KVM: arm64: Manage GCS access and registers for guests · Marc Zyngier <maz@kernel.org> · 2024-08-16
[PATCH v10 15/40] arm64/idreg: Add overrride for GCS · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 15/40] arm64/idreg: Add overrride for GCS · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-19
[PATCH v10 16/40] arm64/hwcap: Add hwcap for GCS · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 16/40] arm64/hwcap: Add hwcap for GCS · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-19
[PATCH v10 17/40] arm64/traps: Handle GCS exceptions · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 17/40] arm64/traps: Handle GCS exceptions · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-19
[PATCH v10 18/40] arm64/mm: Handle GCS data aborts · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 18/40] arm64/mm: Handle GCS data aborts · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-19
Re: [PATCH v10 18/40] arm64/mm: Handle GCS data aborts · Mark Brown <broonie@kernel.org> · 2024-08-19
[PATCH v10 19/40] arm64/gcs: Context switch GCS state for EL0 · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 19/40] arm64/gcs: Context switch GCS state for EL0 · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-19
Re: [PATCH v10 19/40] arm64/gcs: Context switch GCS state for EL0 · Mark Brown <broonie@kernel.org> · 2024-08-19
Re: [PATCH v10 19/40] arm64/gcs: Context switch GCS state for EL0 · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-20
Re: [PATCH v10 19/40] arm64/gcs: Context switch GCS state for EL0 · Mark Brown <broonie@kernel.org> · 2024-08-20
Re: [PATCH v10 19/40] arm64/gcs: Context switch GCS state for EL0 · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-21
Re: [PATCH v10 19/40] arm64/gcs: Context switch GCS state for EL0 · Mark Brown <broonie@kernel.org> · 2024-08-21
[PATCH v10 20/40] arm64/gcs: Ensure that new threads have a GCS · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 20/40] arm64/gcs: Ensure that new threads have a GCS · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-19
Re: [PATCH v10 20/40] arm64/gcs: Ensure that new threads have a GCS · Mark Brown <broonie@kernel.org> · 2024-08-19
Re: [PATCH v10 20/40] arm64/gcs: Ensure that new threads have a GCS · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-20
[PATCH v10 21/40] arm64/gcs: Implement shadow stack prctl() interface · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 21/40] arm64/gcs: Implement shadow stack prctl() interface · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-21
Re: [PATCH v10 21/40] arm64/gcs: Implement shadow stack prctl() interface · Mark Brown <broonie@kernel.org> · 2024-08-21
[PATCH v10 22/40] arm64/mm: Implement map_shadow_stack() · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 22/40] arm64/mm: Implement map_shadow_stack() · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-21
[PATCH v10 23/40] arm64/signal: Set up and restore the GCS context for signal handlers · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 23/40] arm64/signal: Set up and restore the GCS context for signal handlers · Dave Martin <Dave.Martin@arm.com> · 2024-08-14
Re: [PATCH v10 23/40] arm64/signal: Set up and restore the GCS context for signal handlers · Mark Brown <broonie@kernel.org> · 2024-08-14
Re: [PATCH v10 23/40] arm64/signal: Set up and restore the GCS context for signal handlers · Dave Martin <Dave.Martin@arm.com> · 2024-08-15
Re: [PATCH v10 23/40] arm64/signal: Set up and restore the GCS context for signal handlers · Mark Brown <broonie@kernel.org> · 2024-08-15
Re: [PATCH v10 23/40] arm64/signal: Set up and restore the GCS context for signal handlers · Dave Martin <Dave.Martin@arm.com> · 2024-08-15
Re: [PATCH v10 23/40] arm64/signal: Set up and restore the GCS context for signal handlers · Mark Brown <broonie@kernel.org> · 2024-08-15
Re: [PATCH v10 23/40] arm64/signal: Set up and restore the GCS context for signal handlers · Dave Martin <Dave.Martin@arm.com> · 2024-08-15
Re: [PATCH v10 23/40] arm64/signal: Set up and restore the GCS context for signal handlers · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-21
Re: [PATCH v10 23/40] arm64/signal: Set up and restore the GCS context for signal handlers · Mark Brown <broonie@kernel.org> · 2024-08-21
Re: [PATCH v10 23/40] arm64/signal: Set up and restore the GCS context for signal handlers · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-21
[PATCH v10 24/40] arm64/signal: Expose GCS state in signal frames · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 24/40] arm64/signal: Expose GCS state in signal frames · Dave Martin <Dave.Martin@arm.com> · 2024-08-14
Re: [PATCH v10 24/40] arm64/signal: Expose GCS state in signal frames · Mark Brown <broonie@kernel.org> · 2024-08-14
Re: [PATCH v10 24/40] arm64/signal: Expose GCS state in signal frames · Dave Martin <Dave.Martin@arm.com> · 2024-08-15
Re: [PATCH v10 24/40] arm64/signal: Expose GCS state in signal frames · Mark Brown <broonie@kernel.org> · 2024-08-15
Re: [PATCH v10 24/40] arm64/signal: Expose GCS state in signal frames · Dave Martin <Dave.Martin@arm.com> · 2024-08-15
Re: [PATCH v10 24/40] arm64/signal: Expose GCS state in signal frames · Mark Brown <broonie@kernel.org> · 2024-08-15
Re: [PATCH v10 24/40] arm64/signal: Expose GCS state in signal frames · Dave Martin <Dave.Martin@arm.com> · 2024-08-15
Re: [PATCH v10 24/40] arm64/signal: Expose GCS state in signal frames · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-21
[PATCH v10 25/40] arm64/ptrace: Expose GCS via ptrace and core files · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 25/40] arm64/ptrace: Expose GCS via ptrace and core files · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-21
Re: [PATCH v10 25/40] arm64/ptrace: Expose GCS via ptrace and core files · Mark Brown <broonie@kernel.org> · 2024-08-21
Re: [PATCH v10 25/40] arm64/ptrace: Expose GCS via ptrace and core files · Mark Brown <broonie@kernel.org> · 2024-08-21
[PATCH v10 26/40] arm64: Add Kconfig for Guarded Control Stack (GCS) · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 26/40] arm64: Add Kconfig for Guarded Control Stack (GCS) · Catalin Marinas <catalin.marinas@arm.com> · 2024-08-21
[PATCH v10 27/40] kselftest/arm64: Verify the GCS hwcap · Mark Brown <broonie@kernel.org> · 2024-08-01
[PATCH v10 28/40] kselftest: Provide shadow stack enable helpers for arm64 · Mark Brown <broonie@kernel.org> · 2024-08-01
[PATCH v10 29/40] selftests/clone3: Enable arm64 shadow stack testing · Mark Brown <broonie@kernel.org> · 2024-08-01
[PATCH v10 30/40] kselftest/arm64: Add GCS as a detected feature in the signal tests · Mark Brown <broonie@kernel.org> · 2024-08-01
[PATCH v10 31/40] kselftest/arm64: Add framework support for GCS to signal handling tests · Mark Brown <broonie@kernel.org> · 2024-08-01
[PATCH v10 32/40] kselftest/arm64: Allow signals tests to specify an expected si_code · Mark Brown <broonie@kernel.org> · 2024-08-01
[PATCH v10 33/40] kselftest/arm64: Always run signals tests with GCS enabled · Mark Brown <broonie@kernel.org> · 2024-08-01
[PATCH v10 34/40] kselftest/arm64: Add very basic GCS test program · Mark Brown <broonie@kernel.org> · 2024-08-01
[PATCH v10 35/40] kselftest/arm64: Add a GCS test program built with the system libc · Mark Brown <broonie@kernel.org> · 2024-08-01
[PATCH v10 36/40] kselftest/arm64: Add test coverage for GCS mode locking · Mark Brown <broonie@kernel.org> · 2024-08-01
[PATCH v10 37/40] kselftest/arm64: Add GCS signal tests · Mark Brown <broonie@kernel.org> · 2024-08-01
[PATCH v10 38/40] kselftest/arm64: Add a GCS stress test · Mark Brown <broonie@kernel.org> · 2024-08-01
[PATCH v10 39/40] kselftest/arm64: Enable GCS for the FP stress tests · Mark Brown <broonie@kernel.org> · 2024-08-01
[PATCH v10 40/40] KVM: selftests: arm64: Add GCS registers to get-reg-list · Mark Brown <broonie@kernel.org> · 2024-08-01
Re: [PATCH v10 00/40] arm64/gcs: Provide support for GCS in userspace · Anders Roxell <hidden> · 2024-08-02
Re: [PATCH v10 00/40] arm64/gcs: Provide support for GCS in userspace · Marc Zyngier <maz@kernel.org> · 2024-08-16

From: Catalin Marinas <catalin.marinas@arm.com>
Date: 2024-08-16 11:12:54
Also in: kvmarm, linux-arch, linux-doc, linux-fsdevel, linux-kselftest, linux-mm, linux-riscv, lkml

On Thu, Aug 01, 2024 at 01:06:35PM +0100, Mark Brown wrote:

In order for EL1 to write to an EL0 GCS it must use the GCSSTTR instruction
rather than a normal STTR. Provide a put_user_gcs() which does this.

Reviewed-by: Thiago Jung Bauermann <redacted>
Signed-off-by: Mark Brown <broonie@kernel.org>

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>

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