[Xen-devel] [PATCH][VT] add "wbinvd" instruction emulattion for real mode code

["Li, Xin B" <xin.b.li@xxxxxxxxx>]

This patch adds "wbinvd" instruction emulation for vm86 mode.

This is needed when we bring up AP of SMP VMX guest.

Signed-off-by: Xin Li <xin.b.li@xxxxxxxxx>

diff -r 94c6fc048d8e tools/firmware/vmxassist/vm86.c
--- a/tools/firmware/vmxassist/vm86.c   Fri Sep 23 11:52:43 2005
+++ b/tools/firmware/vmxassist/vm86.c   Tue Sep 27 17:17:25 2005
@@ -752,6 +752,9 @@
                    goto invalid;
                }
                break;
+           case 0x09: /* wbinvd */
+               asm volatile("wbinvd");
+               return OPC_EMULATED;
            case 0x20: /* mov Rd, Cd (1h) */
            case 0x22:
                if (!movcr(regs, prefix, opc))

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