KVM: x86 emulator: Use opcode::execute for CLI/STI(FA/FB)

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index e9dbbc9..663bdb3 100644 (file)
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -2846,6 +2846,25 @@ static int em_jcxz(struct x86_emulate_ctxt *ctxt)
        return X86EMUL_CONTINUE;
 }
 
+static int em_cli(struct x86_emulate_ctxt *ctxt)
+{
+       if (emulator_bad_iopl(ctxt))
+               return emulate_gp(ctxt, 0);
+
+       ctxt->eflags &= ~X86_EFLAGS_IF;
+       return X86EMUL_CONTINUE;
+}
+
+static int em_sti(struct x86_emulate_ctxt *ctxt)
+{
+       if (emulator_bad_iopl(ctxt))
+               return emulate_gp(ctxt, 0);
+
+       ctxt->interruptibility = KVM_X86_SHADOW_INT_STI;
+       ctxt->eflags |= X86_EFLAGS_IF;
+       return X86EMUL_CONTINUE;
+}
+
 static bool valid_cr(int nr)
 {
        switch (nr) {
@@ -3276,7 +3295,8 @@ static struct opcode opcode_table[256] = {
        DI(ImplicitOps | Priv, hlt), D(ImplicitOps),
        G(ByteOp, group3), G(0, group3),
        /* 0xF8 - 0xFF */
-       D(ImplicitOps), D(ImplicitOps), D(ImplicitOps), D(ImplicitOps),
+       D(ImplicitOps), D(ImplicitOps),
+       I(ImplicitOps, em_cli), I(ImplicitOps, em_sti),
        D(ImplicitOps), D(ImplicitOps), G(0, group4), G(0, group5),
 };
 
@@ -4049,22 +4069,6 @@ special_insn:
        case 0xf9: /* stc */
                ctxt->eflags |= EFLG_CF;
                break;
-       case 0xfa: /* cli */
-               if (emulator_bad_iopl(ctxt)) {
-                       rc = emulate_gp(ctxt, 0);
-                       goto done;
-               } else
-                       ctxt->eflags &= ~X86_EFLAGS_IF;
-               break;
-       case 0xfb: /* sti */
-               if (emulator_bad_iopl(ctxt)) {
-                       rc = emulate_gp(ctxt, 0);
-                       goto done;
-               } else {
-                       ctxt->interruptibility = KVM_X86_SHADOW_INT_STI;
-                       ctxt->eflags |= X86_EFLAGS_IF;
-               }
-               break;
        case 0xfc: /* cld */
                ctxt->eflags &= ~EFLG_DF;
                break;