1 files changed, 46 insertions, 0 deletions

diff --git a/recipes-kernel/linux/linux-hierofalcon/02-41-Hierofalcon-Enable-32-bit-EL0-with-64K-and-4K-page-s.patch b/recipes-kernel/linux/linux-hierofalcon/02-41-Hierofalcon-Enable-32-bit-EL0-with-64K-and-4K-page-s.patch
new file mode 100644
index 0000000..7fe0cda
--- /dev/null
+++ b/recipes-kernel/linux/linux-hierofalcon/02-41-Hierofalcon-Enable-32-bit-EL0-with-64K-and-4K-page-s.patch
@@ -0,0 +1,46 @@
+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] Hierofalcon: Enable 32-bit EL0 with 64K and 4K page sizes
+
+ Hierofalcon is able to switch to aarch32 EL0 only with following setup:
+  - Page Size 64K - 42bit VA
+  - Page Size 4K  - 48bit VA
+
+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
+