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authorAlexander Graf <agraf@suse.de>2015-03-16 16:32:23 +0000
committerWill Deacon <will.deacon@arm.com>2015-03-19 10:43:56 +0000
commita8fcd8b192bb15debe1db276e073c6ba9a3fc953 (patch)
treedbfd6180b91eba3dc569e013582ddff68ca89776 /arch/arm64/Kconfig
parent18ccb0cab49ef7868eaf9504f257e1a84683dbbd (diff)
downloadop-kernel-dev-a8fcd8b192bb15debe1db276e073c6ba9a3fc953.zip
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arm64: Enable CONFIG_COMPAT also for 64k page size
With binutils 2.25 the default alignment for 32bit arm sections changed to have everything 64k aligned. Armv7 binaries built with this binutils version run successfully on an arm64 system. Since effectively there is now the chance to run armv7 code on arm64 even with 64k page size, it doesn't make sense to block people from enabling CONFIG_COMPAT on those configurations. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/Kconfig')
-rw-r--r--arch/arm64/Kconfig6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 0d46deb..c102d92 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -674,7 +674,7 @@ source "fs/Kconfig.binfmt"
config COMPAT
bool "Kernel support for 32-bit EL0"
- depends on !ARM64_64K_PAGES
+ depends on !ARM64_64K_PAGES || EXPERT
select COMPAT_BINFMT_ELF
select HAVE_UID16
select OLD_SIGSUSPEND3
@@ -685,6 +685,10 @@ config COMPAT
the user helper functions, VFP support and the ptrace interface are
handled appropriately by the kernel.
+ If you also enabled CONFIG_ARM64_64K_PAGES, please be aware that you
+ will only be able to execute AArch32 binaries that were compiled with
+ 64k aligned segments.
+
If you want to execute 32-bit userspace applications, say Y.
config SYSVIPC_COMPAT
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