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Add CONFIG_GENERIC_VDSO_OVERFLOW_PROTECT in preparation to add multiplication overflow protection to the VDSO time getter functions. Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20240325064023.2997-4-adrian.hunter@intel.com
41 lines
870 B
Plaintext
41 lines
870 B
Plaintext
# SPDX-License-Identifier: GPL-2.0
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config HAVE_GENERIC_VDSO
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bool
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if HAVE_GENERIC_VDSO
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config GENERIC_GETTIMEOFDAY
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bool
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help
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This is a generic implementation of gettimeofday vdso.
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Each architecture that enables this feature has to
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provide the fallback implementation.
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config GENERIC_VDSO_32
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bool
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depends on GENERIC_GETTIMEOFDAY && !64BIT
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help
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This config option helps to avoid possible performance issues
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in 32 bit only architectures.
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config GENERIC_COMPAT_VDSO
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bool
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help
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This config option enables the compat VDSO layer.
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config GENERIC_VDSO_TIME_NS
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bool
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help
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Selected by architectures which support time namespaces in the
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VDSO
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config GENERIC_VDSO_OVERFLOW_PROTECT
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bool
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help
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Select to add multiplication overflow protection to the VDSO
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time getter functions for the price of an extra conditional
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in the hotpath.
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endif
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