mm/execmem, arch: convert remaining overrides of module_alloc to execmem
Extend execmem parameters to accommodate more complex overrides of
module_alloc() by architectures.
This includes specification of a fallback range required by arm, arm64
and powerpc, EXECMEM_MODULE_DATA type required by powerpc, support for
allocation of KASAN shadow required by s390 and x86 and support for
late initialization of execmem required by arm64.
The core implementation of execmem_alloc() takes care of suppressing
warnings when the initial allocation fails but there is a fallback range
defined.
Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Song Liu <song@kernel.org>
Tested-by: Liviu Dudau <liviu@dudau.co.uk>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
diff --git a/arch/Kconfig b/arch/Kconfig
index 93404c8..ee1ccbd 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -977,6 +977,14 @@
For architectures like powerpc/32 which have constraints on module
allocation and need to allocate module data outside of module area.
+config ARCH_WANTS_EXECMEM_LATE
+ bool
+ help
+ For architectures that do not allocate executable memory early on
+ boot, but rather require its initialization late when there is
+ enough entropy for module space randomization, for instance
+ arm64.
+
config HAVE_IRQ_EXIT_ON_IRQ_STACK
bool
help
