From: David Spickett <david.spickett@linaro.org>
To: broonie@kernel.org
Cc: catalin.marinas@arm.com, corbet@lwn.net, david.spickett@arm.com,
linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
luis.machado.foss@gmail.com, mark.rutland@arm.com,
oleg@redhat.com, shuah@kernel.org, thiago.bauermann@linaro.org,
will@kernel.org, David Spickett <david.spickett@linaro.org>
Subject: Re: [PATCH v2 1/3] arm64/sme: Support disabling streaming mode via ptrace on SME only systems
Date: Wed, 29 Oct 2025 15:23:30 +0000 [thread overview]
Message-ID: <20251029152330.155394-1-david.spickett@linaro.org> (raw)
In-Reply-To: <20251015-arm64-sme-ptrace-sme-only-v2-1-33c7b2f27cbf@kernel.org>
I have put the LLDB changes for this into review.
We are tracking SME only support in this issue:
https://github.com/llvm/llvm-project/issues/138717
The PRs that relate to these kernel changes are
listed in this comment:
https://github.com/llvm/llvm-project/issues/138717#issuecomment-3456979166
LLDB's use case for this new ptrace feature is to restore
process state after expression evaluation takes a process
from non-streaming to streaming mode. We have a specific
code path to handle that restoration, and it was not a
problem to integrate this new ptrace feature.
I have proven with testcases that LLDB can restore
any streaming mode/ZA/streaming vector length
combination, starting from any other combination.
The LLDB changes will remain in review until if/when
these kernel changes are accepted. I expect LLDB
reviewers will be ok approving changes on the condition
that I wait for the kernel side before merging.
I expect LLDB review to take some time, likely a month,
due to the availability of reviewers at this time.
Reviewed-by: David Spickett <david.spickett@linaro.org>
next prev parent reply other threads:[~2025-10-29 15:23 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-15 17:56 [PATCH v2 0/3] arm64/sme: Support disabling streaming mode via ptrace on SME only systems Mark Brown
2025-10-15 17:56 ` [PATCH v2 1/3] " Mark Brown
2025-10-29 15:23 ` David Spickett [this message]
2025-10-15 17:56 ` [PATCH v2 2/3] kselftst/arm64: Test NT_ARM_SVE FPSIMD format writes on non-SVE systems Mark Brown
2025-10-15 17:56 ` [PATCH v2 3/3] kselftest/arm64: Cover disabling streaming mode without SVE in fp-ptrace Mark Brown
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