summaryrefslogtreecommitdiff
path: root/arch/arm64/Kconfig
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm64/Kconfig')
-rw-r--r--arch/arm64/Kconfig17
1 files changed, 16 insertions, 1 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 57b02d4ceb71..22f8e6b3b0f9 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1418,8 +1418,23 @@ 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.
+
+ When running with address space randomization (KASLR), the module
+ region itself may be too far away for ordinary relative jumps and
+ calls, and so in that case, module PLTs are required and cannot be
+ disabled.
+
+ Specific errata workaround(s) might also force module PLTs to be
+ enabled (ARM64_ERRATUM_843419).
config ARM64_PSEUDO_NMI
bool "Support for NMI-like interrupts"