diff options
| author | Wei Yongjun <yjwei@cn.fujitsu.com> | 2010-07-06 16:54:19 +0800 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-08-02 06:40:26 +0300 |
| commit | 07cbc6c185aee2c0479776845988242a040c7c93 (patch) | |
| tree | b47ff3619fe38985273a51e663a81d41674a9ee0 /arch/x86/kvm | |
| parent | b16b2b7bb5a78afceb7fe22f2a04476cd70182b7 (diff) | |
KVM: x86 emulator: fix cli/sti instruction emulation
If IOPL check fail, the cli/sti emulate GP and then we should
skip writeback since the default write OP is OP_REG.
Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/emulate.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 8337567a0f4..286572a5675 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -2979,17 +2979,19 @@ special_insn: c->dst.type = OP_NONE; /* Disable writeback. */ break; case 0xfa: /* cli */ - if (emulator_bad_iopl(ctxt, ops)) + if (emulator_bad_iopl(ctxt, ops)) { emulate_gp(ctxt, 0); - else { + goto done; + } else { ctxt->eflags &= ~X86_EFLAGS_IF; c->dst.type = OP_NONE; /* Disable writeback. */ } break; case 0xfb: /* sti */ - if (emulator_bad_iopl(ctxt, ops)) + if (emulator_bad_iopl(ctxt, ops)) { emulate_gp(ctxt, 0); - else { + goto done; + } else { ctxt->interruptibility = KVM_X86_SHADOW_INT_STI; ctxt->eflags |= X86_EFLAGS_IF; c->dst.type = OP_NONE; /* Disable writeback. */ |