From: Daniel Borkmann Date: Tue, 21 Feb 2017 15:09:33 +0000 (+0100) Subject: arch: add ARCH_HAS_SET_MEMORY config X-Git-Tag: v4.11-rc1~124^2~3^2~1 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d2852a224050;p=karo-tx-linux.git arch: add ARCH_HAS_SET_MEMORY config Currently, there's no good way to test for the presence of set_memory_ro/rw/x/nx() helpers implemented by archs such as x86, arm, arm64 and s390. There's DEBUG_SET_MODULE_RONX and DEBUG_RODATA, however both don't really reflect that: set_memory_*() are also available even when DEBUG_SET_MODULE_RONX is turned off, and DEBUG_RODATA is set by parisc, but doesn't implement above functions. Thus, add ARCH_HAS_SET_MEMORY that is selected by mentioned archs, where generic code can test against this. This also allows later on to move DEBUG_SET_MODULE_RONX out of the arch specific Kconfig to define it only once depending on ARCH_HAS_SET_MEMORY. Suggested-by: Laura Abbott Signed-off-by: Daniel Borkmann Signed-off-by: David S. Miller --- diff --git a/arch/Kconfig b/arch/Kconfig index bd04eace455c..e8ada79ec71f 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -222,6 +222,10 @@ config GENERIC_SMP_IDLE_THREAD config GENERIC_IDLE_POLL_SETUP bool +# Select if arch has all set_memory_ro/rw/x/nx() functions in asm/cacheflush.h +config ARCH_HAS_SET_MEMORY + bool + # Select if arch init_task initializer is different to init/init_task.c config ARCH_INIT_TASK bool diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 186c4c214e0a..edae056b2af0 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -4,6 +4,7 @@ config ARM select ARCH_CLOCKSOURCE_DATA select ARCH_HAS_DEVMEM_IS_ALLOWED select ARCH_HAS_ELF_RANDOMIZE + select ARCH_HAS_SET_MEMORY select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST select ARCH_HAVE_CUSTOM_GPIO_H select ARCH_HAS_GCOV_PROFILE_ALL diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 111742126897..1853405a897e 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -12,6 +12,7 @@ config ARM64 select ARCH_HAS_GCOV_PROFILE_ALL select ARCH_HAS_GIGANTIC_PAGE select ARCH_HAS_KCOV + select ARCH_HAS_SET_MEMORY select ARCH_HAS_SG_CHAIN select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST select ARCH_USE_CMPXCHG_LOCKREF diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index c6722112527d..094deb1abbe7 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -72,6 +72,7 @@ config S390 select ARCH_HAS_GCOV_PROFILE_ALL select ARCH_HAS_GIGANTIC_PAGE select ARCH_HAS_KCOV + select ARCH_HAS_SET_MEMORY select ARCH_HAS_SG_CHAIN select ARCH_HAS_UBSAN_SANITIZE_ALL select ARCH_HAVE_NMI_SAFE_CMPXCHG diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index e487493bbd47..434dd2a1c5f2 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -53,6 +53,7 @@ config X86 select ARCH_HAS_KCOV if X86_64 select ARCH_HAS_MMIO_FLUSH select ARCH_HAS_PMEM_API if X86_64 + select ARCH_HAS_SET_MEMORY select ARCH_HAS_SG_CHAIN select ARCH_HAS_UBSAN_SANITIZE_ALL select ARCH_HAVE_NMI_SAFE_CMPXCHG