vmx realmode: Emulate protected-mode transition while CS and SS have

bad selector values (bottom two bits non-zero).

Allows opensuse 10.3 install CD to boot. Unfortunately SUSE Linux 10.1
install CD still fails to work...

Signed-off-by: Keir Fraser <keir.fraser@citrix.com>

1 files changed, 11 insertions, 1 deletions

diff --git a/xen/include/asm-x86/x86_emulate.h b/xen/include/asm-x86/x86_emulate.h
index 17a76f936a..53d12f52be 100644
--- a/xen/include/asm-x86/x86_emulate.h
+++ b/xen/include/asm-x86/x86_emulate.h
@@ -39,9 +39,18 @@ enum x86_segment {
     x86_seg_tr,
     x86_seg_ldtr,
     x86_seg_gdtr,
-    x86_seg_idtr
+    x86_seg_idtr,
+    /*
+     * Dummy: used to emulate direct processor accesses to management
+     * structures (TSS, GDT, LDT, IDT, etc.) which use linear addressing
+     * (no segment component) and bypass usual segment- and page-level
+     * protection checks.
+     */
+    x86_seg_none
 };
 
+#define is_x86_user_segment(seg) ((unsigned)(seg) <= x86_seg_gs)
+
 /* 
  * Attribute for segment selector. This is a copy of bit 40:47 & 52:55 of the
  * segment descriptor. It happens to match the format of an AMD SVM VMCB.
@@ -333,6 +342,7 @@ struct x86_emulate_ops
     /* inject_hw_exception */
     int (*inject_hw_exception)(
         uint8_t vector,
+        uint16_t error_code,
         struct x86_emulate_ctxt *ctxt);
 
     /* inject_sw_interrupt */