Commit d2852a22 authored by Daniel Borkmann's avatar Daniel Borkmann Committed by David S. Miller
Browse files

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: default avatarLaura Abbott <labbott@redhat.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 559c59b2

arch/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -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

arch/arm/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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

arch/arm64/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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

arch/s390/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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

arch/x86/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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

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