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| author | Avi Kivity <avi@redhat.com> | 2012-06-13 16:33:29 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2012-07-09 14:19:05 +0300 |
| commit | 80890006167ec3e570bfd7cee7a05db17d339726 (patch) | |
| tree | 613300ec7c04969ea591d4ff059ff849f0ec0c95 | |
| parent | 869be99c7579c857885643ba2aed87ced339c6a2 (diff) | |
| download | linux-80890006167ec3e570bfd7cee7a05db17d339726.tar.bz2 | |
KVM: x86 emulator: implement LTR
Opcode 0F 00 /3. Encountered during Windows XP secondary processor bringup.
Signed-off-by: Avi Kivity <avi@redhat.com>
| -rw-r--r-- | arch/x86/kvm/emulate.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 92a1adde0b44..97d9a9914ba8 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -3033,6 +3033,15 @@ static int em_lldt(struct x86_emulate_ctxt *ctxt) return load_segment_descriptor(ctxt, sel, VCPU_SREG_LDTR); } +static int em_ltr(struct x86_emulate_ctxt *ctxt) +{ + u16 sel = ctxt->src.val; + + /* Disable writeback. */ + ctxt->dst.type = OP_NONE; + return load_segment_descriptor(ctxt, sel, VCPU_SREG_TR); +} + static int em_invlpg(struct x86_emulate_ctxt *ctxt) { int rc; @@ -3579,7 +3588,7 @@ static struct opcode group6[] = { DI(Prot, sldt), DI(Prot, str), II(Prot | Priv | SrcMem16, em_lldt, lldt), - DI(Prot | Priv, ltr), + II(Prot | Priv | SrcMem16, em_ltr, ltr), N, N, N, N, }; |