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| author | Nathan Lynch <nathan_lynch@mentor.com> | 2015-03-25 19:16:05 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2015-03-27 22:20:45 +0000 |
| commit | e5b61deb3af465f11db7e5e11944ba00a33ece1f (patch) | |
| tree | 9a33472595fbd61a56618226340db1d9b53476f8 /arch/arm/mm | |
| parent | ecf99a439105ebd0a507af1a9cd901a2e166bf9a (diff) | |
| download | linux-e5b61deb3af465f11db7e5e11944ba00a33ece1f.tar.bz2 | |
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 <nathan_lynch@mentor.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm')
| -rw-r--r-- | arch/arm/mm/Kconfig | 14 |
1 files changed, 14 insertions, 0 deletions
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 |