arm64: Kconfig: support CONFIG_KASAN_VMALLOC

We can backed shadow memory in vmalloc area after vmalloc area
isn't populated at kasan_init(), thus make KASAN_VMALLOC selectable.

Signed-off-by: Lecopzer Chen <lecopzer.chen@mediatek.com>
Acked-by: Andrey Konovalov <andreyknvl@gmail.com>
Tested-by: Andrey Konovalov <andreyknvl@gmail.com>
Tested-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20210324040522.15548-4-lecopzer.chen@mediatek.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 5656e7a..3e54fa9 100644 (file)
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -138,6 +138,7 @@ config ARM64
        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_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)
        select HAVE_ARCH_KFENCE