From e5b61deb3af465f11db7e5e11944ba00a33ece1f Mon Sep 17 00:00:00 2001 From: Nathan Lynch Date: Wed, 25 Mar 2015 19:16:05 +0100 Subject: ARM: 8332/1: add CONFIG_VDSO Kconfig and Makefile bits Allow users to enable the vdso in Kconfig; include the vdso in the build if CONFIG_VDSO is enabled. Add 'vdso_install' target. Signed-off-by: Nathan Lynch Signed-off-by: Russell King --- arch/arm/mm/Kconfig | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'arch/arm/mm/Kconfig') diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index 9b4f29e595a4..8a5f1e644104 100644 --- a/arch/arm/mm/Kconfig +++ b/arch/arm/mm/Kconfig @@ -825,6 +825,20 @@ config KUSER_HELPERS Say N here only if you are absolutely certain that you do not need these helpers; otherwise, the safe option is to say Y. +config VDSO + bool "Enable VDSO for acceleration of some system calls" + depends on AEABI && MMU + default y if ARM_ARCH_TIMER + select GENERIC_TIME_VSYSCALL + help + Place in the process address space an ELF shared object + providing fast implementations of gettimeofday and + clock_gettime. Systems that implement the ARM architected + timer will receive maximum benefit. + + You must have glibc 2.22 or later for programs to seamlessly + take advantage of this. + config DMA_CACHE_RWFO bool "Enable read/write for ownership DMA cache maintenance" depends on CPU_V6K && SMP -- cgit v1.2.3-59-g8ed1b