Ian Campbell
2008-Oct-24 10:16 UTC
[Xen-devel] xen: relax restrictions on reserved bits in L3 for 32on64 x86 guests
xen: 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 <ian.campbell@citrix.com> diff -r bb1a67a7db26 xen/include/asm-x86/x86_64/page.h --- a/xen/include/asm-x86/x86_64/page.h Thu Oct 16 15:46:04 2008 +0100 +++ b/xen/include/asm-x86/x86_64/page.h Fri Oct 24 11:05:43 2008 +0100 @@ -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) _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel