From: Jan Beulich <jbeulich@suse.com>
Date: Wed, 10 Jun 2015 10:01:35 +0000 (+0200)
Subject: x86/EFI: fix EFI_MEMORY_WP handling
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~3119
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=af23e79f46583abc18e8cffdec0b69297cfbdff0;p=xen.git

x86/EFI: fix EFI_MEMORY_WP handling

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
---

diff --git a/xen/common/efi/boot.c b/xen/common/efi/boot.c
index 4b816f2862..130166e75e 100644
--- a/xen/common/efi/boot.c
+++ b/xen/common/efi/boot.c
@@ -1202,7 +1202,7 @@ void __init efi_init_memory(void)
         }
 
         if ( desc->Attribute & EFI_MEMORY_WP )
-            prot &= _PAGE_RW;
+            prot &= ~_PAGE_RW;
         if ( desc->Attribute & EFI_MEMORY_XP )
             prot |= _PAGE_NX;