[Xen-changelog] Set pagetable bits correctly (for Linux) in DOM0 builder.

[BitKeeper B. <ri...@su...>]

ChangeSet 1.1271, 2005/02/27 13:40:30+00:00, ka...@sc...

	Set pagetable bits correctly (for Linux) in DOM0 builder.
	Signed-off-by: Keir Fraser <ke...@xe...>



 domain_build.c |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)


diff -Nru a/xen/arch/x86/domain_build.c b/xen/arch/x86/domain_build.c
--- a/xen/arch/x86/domain_build.c	2005-02-27 09:01:00 -05:00
+++ b/xen/arch/x86/domain_build.c	2005-02-27 09:01:00 -05:00
@@ -32,9 +32,11 @@
 /* Allow ring-3 access in long mode as guest cannot use ring 1. */
 #define L1_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED|_PAGE_USER)
 #endif
-#define L2_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED|_PAGE_USER)
-#define L3_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED|_PAGE_USER)
-#define L4_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED|_PAGE_USER)
+/* Don't change these: Linux expects just these bits to be set. */
+/* (And that includes the bogus _PAGE_DIRTY!) */
+#define L2_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED|_PAGE_DIRTY|_PAGE_USER)
+#define L3_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED|_PAGE_DIRTY|_PAGE_USER)
+#define L4_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED|_PAGE_DIRTY|_PAGE_USER)
 
 #define round_pgup(_p)    (((_p)+(PAGE_SIZE-1))&PAGE_MASK)
 #define round_pgdown(_p)  ((_p)&PAGE_MASK)