Make ARM64_MODULE_PLTS a selectable Kconfig symbol, since some people
might have very big modules spilling out of the dedicated module area
into vmalloc. Help text is copied from the ARM 32-bit counterpart.
Signed-off-by: Florian Fainelli <f.faine...@gmail.com>
---
arch/arm64/Kconfig | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 697ea0510729..36befe987b73 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1418,8 +1418,20 @@ config ARM64_SVE
KVM in the same kernel image.
config ARM64_MODULE_PLTS
- bool
+ bool "Use PLTs to allow module memory to spill over into vmalloc area"
select HAVE_MOD_ARCH_SPECIFIC
+ help
+ Allocate PLTs when loading modules so that jumps and calls whose
+ targets are too far away for their relative offsets to be encoded
+ in the instructions themselves can be bounced via veneers in the
+ module's PLT. This allows modules to be allocated in the generic
+ vmalloc area after the dedicated module memory area has been
+ exhausted. The modules will use slightly more memory, but after
+ rounding up to page size, the actual memory footprint is usually
+ the same.
+
+ Disabling this is usually safe for small single-platform
+ configurations. If unsure, say y.
config ARM64_PSEUDO_NMI
bool "Support for NMI-like interrupts"
--
2.17.1
