Re: [PATCH v10 09/40] arm64/gcs: Provide basic EL2 setup to allow GCS usage... | linux-arm-kernel

[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

Re: [PATCH v10 09/40] arm64/gcs: Provide basic EL2 setup to allow GCS usage at EL0 and EL1

From: Catalin Marinas <catalin.marinas@arm.com>
Date: 2024-08-16 11:13:34
Also in: kvmarm, linux-arch, linux-doc, linux-fsdevel, linux-kselftest, linux-mm, linux-riscv, lkml

On Thu, Aug 01, 2024 at 01:06:36PM +0100, Mark Brown wrote:

There is a control HCRX_EL2.GCSEn which must be set to allow GCS
features to take effect at lower ELs and also fine grained traps for GCS
usage at EL0 and EL1.  Configure all these to allow GCS usage by EL0 and
EL1.

We also initialise GCSCR_EL1 and GCSCRE0_EL1 to ensure that we can
execute function call instructions without faulting regardless of the
state when the kernel is started.

Signed-off-by: Mark Brown <broonie@kernel.org>

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

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