[Xen-devel] [PATCH] vmx-smsw.patch

[Arun Sharma <arun.sharma@xxxxxxxxx>]

Handle vmexits from the SMSW instruction correctly.

Signed-off-by: Arun Sharma <arun.sharma@xxxxxxxxx>

--- 1.58/xen/arch/x86/vmx.c     2005-05-26 19:36:15 -07:00
+++ edited/xen/arch/x86/vmx.c   2005-05-27 12:27:13 -07:00
@@ -987,10 +986,9 @@
         __vmwrite(CR0_READ_SHADOW, value);
         break;
     case TYPE_LMSW:
-        __vmwrite(CR0_READ_SHADOW, value);
+        __vmread(CR0_READ_SHADOW, &value);
        value = (value & ~0xF) |
-               (((exit_qualification & LMSW_SOURCE_DATA) >> 16) & 0xF) |
-               1 /* CR0.PE == 1 */;
+               (((exit_qualification & LMSW_SOURCE_DATA) >> 16) & 0xF);
        return vmx_set_cr0(value);
         break;
     default:

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