target/i386: check intercept for XSETBV

Note that this intercept is special; it is checked before the #GP
exception.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

target/i386/svm.h

@@ -132,6 +132,7 @@
 /* only included in documentation, maybe wrong */
 #define SVM_EXIT_MONITOR	0x08a
 #define SVM_EXIT_MWAIT		0x08b
+#define SVM_EXIT_XSETBV		0x08d
 #define SVM_EXIT_NPF  		0x400
 
 #define SVM_EXIT_ERR		-1

target/i386/tcg/translate.c

@@ -5916,6 +5916,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
                                  | PREFIX_REPZ | PREFIX_REPNZ))) {
                 goto illegal_op;
             }
+            gen_svm_check_intercept(s, SVM_EXIT_XSETBV);
             if (!check_cpl0(s)) {
                 break;
             }