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| author | Avi Kivity <avi@redhat.com> | 2012-06-10 14:21:18 (GMT) |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2012-07-09 11:19:02 (GMT) |
| commit | 96051572c819194c37a8367624b285be10297eca (patch) | |
| tree | 332d3931ce71ef9562de37ab95aaeb7f44db4866 /arch/x86/kvm/emulate.c | |
| parent | a6e3407bb1570ac5d8d7fc471bca07d531d1dde7 (diff) | |
| download | linux-96051572c819194c37a8367624b285be10297eca.tar.xz | |
KVM: x86 emulator: emulate SGDT/SIDT
Opcodes 0F 01 /0 and 0F 01 /1
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/emulate.c')
| -rw-r--r-- | arch/x86/kvm/emulate.c | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 7552c0a..5053e9e 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -3026,6 +3026,35 @@ static int em_vmcall(struct x86_emulate_ctxt *ctxt) return X86EMUL_CONTINUE; } +static int emulate_store_desc_ptr(struct x86_emulate_ctxt *ctxt, + void (*get)(struct x86_emulate_ctxt *ctxt, + struct desc_ptr *ptr)) +{ + struct desc_ptr desc_ptr; + + if (ctxt->mode == X86EMUL_MODE_PROT64) + ctxt->op_bytes = 8; + get(ctxt, &desc_ptr); + if (ctxt->op_bytes == 2) { + ctxt->op_bytes = 4; + desc_ptr.address &= 0x00ffffff; + } + /* Disable writeback. */ + ctxt->dst.type = OP_NONE; + return segmented_write(ctxt, ctxt->dst.addr.mem, + &desc_ptr, 2 + ctxt->op_bytes); +} + +static int em_sgdt(struct x86_emulate_ctxt *ctxt) +{ + return emulate_store_desc_ptr(ctxt, ctxt->ops->get_gdt); +} + +static int em_sidt(struct x86_emulate_ctxt *ctxt) +{ + return emulate_store_desc_ptr(ctxt, ctxt->ops->get_idt); +} + static int em_lgdt(struct x86_emulate_ctxt *ctxt) { struct desc_ptr desc_ptr; @@ -3485,8 +3514,8 @@ static struct opcode group6[] = { }; static struct group_dual group7 = { { - DI(Mov | DstMem | Priv, sgdt), - DI(Mov | DstMem | Priv, sidt), + II(Mov | DstMem | Priv, em_sgdt, sgdt), + II(Mov | DstMem | Priv, em_sidt, sidt), II(SrcMem | Priv, em_lgdt, lgdt), II(SrcMem | Priv, em_lidt, lidt), II(SrcNone | DstMem | Mov, em_smsw, smsw), N, |