Re: [PATCH v7 00/39] arm64/gcs: Provide support for GCS in userspace

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Mark Brown <broonie@xxxxxxxxxx> writes:

>       arm64/mm: Restructure arch_validate_flags() for extensibility
>       prctl: arch-agnostic prctl for shadow stack
>       mman: Add map_shadow_stack() flags
>       arm64: Document boot requirements for Guarded Control Stacks
>       arm64/gcs: Document the ABI for Guarded Control Stacks
>       arm64/sysreg: Add new system registers for GCS
>       arm64/sysreg: Add definitions for architected GCS caps
>       arm64/gcs: Add manual encodings of GCS instructions
>       arm64/gcs: Provide put_user_gcs()
>       arm64/cpufeature: Runtime detection of Guarded Control Stack (GCS)
>       arm64/mm: Allocate PIE slots for EL0 guarded control stack
>       mm: Define VM_SHADOW_STACK for arm64 when we support GCS
>       arm64/mm: Map pages for guarded control stack
>       KVM: arm64: Manage GCS registers for guests
>       arm64/gcs: Allow GCS usage at EL0 and EL1
>       arm64/idreg: Add overrride for GCS
>       arm64/hwcap: Add hwcap for GCS
>       arm64/traps: Handle GCS exceptions
>       arm64/mm: Handle GCS data aborts
>       arm64/gcs: Context switch GCS state for EL0
>       arm64/gcs: Allocate a new GCS for threads with GCS enabled
>       arm64/gcs: Implement shadow stack prctl() interface
>       arm64/mm: Implement map_shadow_stack()
>       arm64/signal: Set up and restore the GCS context for signal handlers
>       arm64/signal: Expose GCS state in signal frames
>       arm64/ptrace: Expose GCS via ptrace and core files
>       arm64: Add Kconfig for Guarded Control Stack (GCS)
>       kselftest/arm64: Verify the GCS hwcap
>       kselftest/arm64: Add GCS as a detected feature in the signal tests
>       kselftest/arm64: Add framework support for GCS to signal handling tests
>       kselftest/arm64: Allow signals tests to specify an expected si_code
>       kselftest/arm64: Always run signals tests with GCS enabled
>       kselftest/arm64: Add very basic GCS test program
>       kselftest/arm64: Add a GCS test program built with the system libc
>       kselftest/arm64: Add test coverage for GCS mode locking
>       selftests/arm64: Add GCS signal tests
>       kselftest/arm64: Add a GCS stress test
>       kselftest/arm64: Enable GCS for the FP stress tests
>       kselftest/clone3: Enable GCS in the clone3 selftests

Not sure if this is warranted, so sorry for the potential spam:

I don't have any comments on the patches I haven't replied to.

-- 
Thiago




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