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From 15839d0281cba986e018a59827d69ae419112162 Mon Sep 17 00:00:00 2001
From: Adrian Calianu <adrian.calianu@enea.com>
Date: Tue, 28 Jul 2015 15:56:51 +0200
Subject: [PATCH 1/1] Seattle: Enable 32-bit EL0 with 64K and 4K page sizes
Seattle is able to switch to aarch32 EL0 only with following setup:
- Page Size 64K - 42bit VA
- Page Size 4K - 48bit VA
Upstream-Status: Pending
Signed-off-by: Adrian Calianu <adrian.calianu@enea.com>
---
arch/arm64/Kconfig | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 7796af4..29f6a03 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -436,6 +436,7 @@ endchoice
choice
prompt "Virtual address space size"
default ARM64_VA_BITS_39 if ARM64_4K_PAGES
+ default ARM64_VA_BITS_48 if ARM64_4K_PAGES
default ARM64_VA_BITS_42 if ARM64_64K_PAGES
help
Allows choosing one of multiple possible virtual address
@@ -452,6 +453,7 @@ config ARM64_VA_BITS_42
config ARM64_VA_BITS_48
bool "48-bit"
+ depends on ARM64_4K_PAGES
endchoice
@@ -715,7 +717,7 @@ source "fs/Kconfig.binfmt"
config COMPAT
bool "Kernel support for 32-bit EL0"
- depends on !ARM64_64K_PAGES || EXPERT
+ depends on !ARM64_64K_PAGES || EXPERT
select COMPAT_BINFMT_ELF
select HAVE_UID16
select OLD_SIGSUSPEND3
--
1.9.1
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