[PATCH v2 16/16] arm64: text replication: add Kconfig
Russell King (Oracle)
rmk+kernel at armlinux.org.uk
Thu Jul 27 08:31:17 PDT 2023
Add the Kconfig symbol for kernel text replication. This unfortunately
requires KASAN and kernel text randomisation options to be disabled at
the moment.
Signed-off-by: Russell King (Oracle) <rmk+kernel at armlinux.org.uk>
---
arch/arm64/Kconfig | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 7856c3a3e35a..53143324c392 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -160,7 +160,7 @@ config ARM64
select HAVE_ARCH_HUGE_VMAP
select HAVE_ARCH_JUMP_LABEL
select HAVE_ARCH_JUMP_LABEL_RELATIVE
- select HAVE_ARCH_KASAN if !(ARM64_16K_PAGES && ARM64_VA_BITS_48)
+ select HAVE_ARCH_KASAN if !(ARM64_16K_PAGES && ARM64_VA_BITS_48 && !REPLICATE_KTEXT)
select HAVE_ARCH_KASAN_VMALLOC if HAVE_ARCH_KASAN
select HAVE_ARCH_KASAN_SW_TAGS if HAVE_ARCH_KASAN
select HAVE_ARCH_KASAN_HW_TAGS if (HAVE_ARCH_KASAN && ARM64_MTE)
@@ -1426,6 +1426,13 @@ config NODES_SHIFT
Specify the maximum number of NUMA Nodes available on the target
system. Increases memory reserved to accommodate various tables.
+config REPLICATE_KTEXT
+ bool "Replicate kernel text across numa nodes"
+ depends on NUMA
+ help
+ Say Y here to enable replicating the kernel text across multiple
+ nodes in a NUMA cluster. This trades memory for speed.
+
source "kernel/Kconfig.hz"
config ARCH_SPARSEMEM_ENABLE
@@ -2173,6 +2180,7 @@ config RELOCATABLE
config RANDOMIZE_BASE
bool "Randomize the address of the kernel image"
+ depends on !REPLICATE_KTEXT
select RELOCATABLE
help
Randomizes the virtual address at which the kernel image is
--
2.30.2
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