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Re: [Xen-devel] [PATCH 1/4] x86/EFI: fix EFI_MEMORY_WP handling

To: Jan Beulich <JBeulich@xxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Date: Tue, 9 Jun 2015 14:57:06 +0100
Delivery-date: Tue, 09 Jun 2015 13:57:14 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

On 09/06/15 14:52, Jan Beulich wrote:

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>


--- a/xen/common/efi/boot.c
+++ b/xen/common/efi/boot.c
@@ -1195,7 +1195,7 @@ 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;

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References:
- [Xen-devel] [PATCH 0/4] misc EFI adjustments
  - From: Jan Beulich
- [Xen-devel] [PATCH 1/4] x86/EFI: fix EFI_MEMORY_WP handling
  - From: Jan Beulich

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