[Qemu-devel] [5496] i386/SVM: return amount of ASIDs

[Aurelien Jarno]

Revision: 5496
          http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=5496
Author:   aurel32
Date:     2008-10-17 08:08:48 +0000 (Fri, 17 Oct 2008)

Log Message:
-----------
i386/SVM: return amount of ASIDs

With SVM the TLB supports tagging to distinguish TLB entries from
different virtual CPUs. This tag is called an ASID. The amount of ASIDs is
given in EBX of the SVM-CPUID-leaf. Currently we return 0, which might
break hypervisors. Let's better return something >0 here, say 0x10.
Since we're flushing the complete TLB on every VM entry and exit we're not
making use of the ASID information anyways.

Signed-off-by: Alexander Graf <address@hidden>
Signed-off-by: Aurelien Jarno <address@hidden>

Modified Paths:
--------------
    trunk/target-i386/op_helper.c

Modified: trunk/target-i386/op_helper.c
===================================================================
--- trunk/target-i386/op_helper.c       2008-10-15 22:25:21 UTC (rev 5495)
+++ trunk/target-i386/op_helper.c       2008-10-17 08:08:48 UTC (rev 5496)
@@ -2037,10 +2037,10 @@
         EDX = 0;
         break;
     case 0x8000000A:
-        EAX = 0x00000001;
-        EBX = 0;
+        EAX = 0x00000001; /* SVM Revision */
+        EBX = 0x00000010; /* nr of ASIDs */
         ECX = 0;
-        EDX = 0;
+        EDX = 0; /* optional features */
         break;
     default:
         /* reserved values: zero */