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authorMark Rutland <mark.rutland@arm.com>2025-04-09 17:40:00 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2025-04-09 18:06:30 +0100
commit45fd86986b79c3ada56d3a14e712447e992433aa (patch)
treedab2c6d53689d7ef8d74860792f25f5b2721d7ab /tools/perf/scripts/python/export-to-postgresql.py
parent61db0e0ba398a3726ca0e6a6399898d3d4c7b0f9 (diff)
arm64/fpsimd: Remove redundant SVE trap manipulation
When task_fpsimd_load() loads the saved FPSIMD/SVE/SME state, it configures EL0 SVE traps by calling sve_user_{enable,disable}(). This is unnecessary, and this is suspicious/confusing as task_fpsimd_load() does not configure EL0 SME traps. All calls to task_fpsimd_load() are followed by a call to fpsimd_bind_task_to_cpu(), where the latter configures traps for SVE and SME dependent upon the current values of TIF_SVE and TIF_SME, overriding any trap configuration performed by task_fpsimd_load(). The calls to sve_user_{enable,disable}() calls in task_fpsimd_load() have been redundant (though benign) since they were introduced in commit: a0136be443d51803 ("arm64/fpsimd: Load FP state based on recorded data type") Remove the unnecessary and confusing SVE trap manipulation. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Marc Zyngier <maz@kernel.org> Cc: Mark Brown <broonie@kernel.org> Cc: Will Deacon <will@kernel.org> Reviewed-by: Mark Brown <broonie@kernel.org> Link: https://lore.kernel.org/r/20250409164010.3480271-4-mark.rutland@arm.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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