[Xen-devel] [PATCH] Add new location of Linux direct-map to the places to look for writable mappings

["George Dunlap" <George.Dunlap@xxxxxxxxxxxxx>]

Add new location of Linux direct-map to the places to look for
writable mappings.

Signed-off-by: George Dunlap <george.dunlap@xxxxxxxxxxxxx>

diff -r dbac9ee4d761 xen/arch/x86/mm/shadow/common.c
--- a/xen/arch/x86/mm/shadow/common.c   Mon Sep 08 16:02:13 2008 +0100
+++ b/xen/arch/x86/mm/shadow/common.c   Fri Sep 12 16:42:32 2008 +0100
@@ -2385,9 +2385,11 @@ int sh_remove_write_access(struct vcpu *
                           + ((fault_addr & VADDR_MASK) >> 27), 3); break;
             }

-            /* 64bit Linux direct map at 0xffff810000000000; older kernels
-             * had it at 0x0000010000000000UL */
+            /* 64bit Linux direct map at 0xffff880000000000; older kernels
+             * had it at 0xffff880000000000, and older kernels yet had it
+             * at 0x0000010000000000UL */
             gfn = mfn_to_gfn(v->domain, gmfn);
+            GUESS(0xffff880000000000UL + (gfn << PAGE_SHIFT), 4);
             GUESS(0xffff810000000000UL + (gfn << PAGE_SHIFT), 4);
             GUESS(0x0000010000000000UL + (gfn << PAGE_SHIFT), 4);

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