From: Keir Fraser Date: Mon, 27 Oct 2008 10:08:48 +0000 (+0000) Subject: x86: relax restrictions on reserved bits in L3 for 32on64 x86 guests X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~14054^2~35 X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https:/%22bookmarks://%22/%22http:/www.example.com/cgi/%22https:/%22bookmarks:/%22?a=commitdiff_plain;h=2f819e06d1f32cecd5179acc9fd037e2e3102d1b;p=xen.git x86: relax restrictions on reserved bits in L3 for 32on64 x86 guests A 32on64 guest cannot copy an existing pinned L3 entry to use as a new L3 because COMPAT_L3_DISALLOW_MASK contains bits which are added to L3 entries by adjust_guest_l3e (U/S & R/W) or by the hardware (A & D). Signed-off-by: Ian Campbell --- diff --git a/xen/include/asm-x86/x86_64/page.h b/xen/include/asm-x86/x86_64/page.h index f20f053dd5..494a877caf 100644 --- a/xen/include/asm-x86/x86_64/page.h +++ b/xen/include/asm-x86/x86_64/page.h @@ -119,7 +119,7 @@ typedef l4_pgentry_t root_pgentry_t; #define L3_DISALLOW_MASK (BASE_DISALLOW_MASK) #define L4_DISALLOW_MASK (BASE_DISALLOW_MASK) -#define COMPAT_L3_DISALLOW_MASK 0xFFFFF1FEU +#define COMPAT_L3_DISALLOW_MASK 0xFFFFF198U #define PAGE_HYPERVISOR (__PAGE_HYPERVISOR | _PAGE_GLOBAL) #define PAGE_HYPERVISOR_NOCACHE (__PAGE_HYPERVISOR_NOCACHE | _PAGE_GLOBAL)