100b26474SVincenzo Frascino# SPDX-License-Identifier: GPL-2.0 200b26474SVincenzo Frascino 300b26474SVincenzo Frascinoconfig HAVE_GENERIC_VDSO 400b26474SVincenzo Frascino bool 500b26474SVincenzo Frascino 600b26474SVincenzo Frascinoif HAVE_GENERIC_VDSO 700b26474SVincenzo Frascino 800b26474SVincenzo Frascinoconfig GENERIC_GETTIMEOFDAY 900b26474SVincenzo Frascino bool 1000b26474SVincenzo Frascino help 1100b26474SVincenzo Frascino This is a generic implementation of gettimeofday vdso. 1200b26474SVincenzo Frascino Each architecture that enables this feature has to 1300b26474SVincenzo Frascino provide the fallback implementation. 1400b26474SVincenzo Frascino 1500b26474SVincenzo Frascinoconfig GENERIC_VDSO_32 1600b26474SVincenzo Frascino bool 1700b26474SVincenzo Frascino depends on GENERIC_GETTIMEOFDAY && !64BIT 1800b26474SVincenzo Frascino help 1900b26474SVincenzo Frascino This config option helps to avoid possible performance issues 2000b26474SVincenzo Frascino in 32 bit only architectures. 2100b26474SVincenzo Frascino 2200b26474SVincenzo Frascinoconfig GENERIC_COMPAT_VDSO 2300b26474SVincenzo Frascino bool 2400b26474SVincenzo Frascino help 2500b26474SVincenzo Frascino This config option enables the compat VDSO layer. 2600b26474SVincenzo Frascino 27660fd04fSThomas Gleixnerconfig GENERIC_VDSO_TIME_NS 28660fd04fSThomas Gleixner bool 29660fd04fSThomas Gleixner help 30660fd04fSThomas Gleixner Selected by architectures which support time namespaces in the 31660fd04fSThomas Gleixner VDSO 32660fd04fSThomas Gleixner 330c68458bSAdrian Hunterconfig GENERIC_VDSO_OVERFLOW_PROTECT 340c68458bSAdrian Hunter bool 350c68458bSAdrian Hunter help 360c68458bSAdrian Hunter Select to add multiplication overflow protection to the VDSO 370c68458bSAdrian Hunter time getter functions for the price of an extra conditional 380c68458bSAdrian Hunter in the hotpath. 390c68458bSAdrian Hunter 4000b26474SVincenzo Frascinoendif 414ad10a5fSJason A. Donenfeld 424ad10a5fSJason A. Donenfeldconfig VDSO_GETRANDOM 434ad10a5fSJason A. Donenfeld bool 444ad10a5fSJason A. Donenfeld help 454ad10a5fSJason A. Donenfeld Selected by architectures that support vDSO getrandom(). 46*df7fcbefSThomas Weißschuh 47*df7fcbefSThomas Weißschuhconfig GENERIC_VDSO_DATA_STORE 48*df7fcbefSThomas Weißschuh bool 49*df7fcbefSThomas Weißschuh help 50*df7fcbefSThomas Weißschuh Selected by architectures that use the generic vDSO data store. 51