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KVM: x86 emulator: emulate SGDT/SIDT
Opcodes 0F 01 /0 and 0F 01 /1 Signed-off-by: Avi Kivity <avi@redhat.com>
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parent
a6e3407bb1
commit
96051572c8
1 changed files with 31 additions and 2 deletions
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@ -3026,6 +3026,35 @@ static int em_vmcall(struct x86_emulate_ctxt *ctxt)
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return X86EMUL_CONTINUE;
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}
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static int emulate_store_desc_ptr(struct x86_emulate_ctxt *ctxt,
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void (*get)(struct x86_emulate_ctxt *ctxt,
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struct desc_ptr *ptr))
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{
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struct desc_ptr desc_ptr;
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if (ctxt->mode == X86EMUL_MODE_PROT64)
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ctxt->op_bytes = 8;
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get(ctxt, &desc_ptr);
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if (ctxt->op_bytes == 2) {
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ctxt->op_bytes = 4;
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desc_ptr.address &= 0x00ffffff;
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}
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/* Disable writeback. */
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ctxt->dst.type = OP_NONE;
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return segmented_write(ctxt, ctxt->dst.addr.mem,
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&desc_ptr, 2 + ctxt->op_bytes);
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}
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static int em_sgdt(struct x86_emulate_ctxt *ctxt)
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{
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return emulate_store_desc_ptr(ctxt, ctxt->ops->get_gdt);
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}
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static int em_sidt(struct x86_emulate_ctxt *ctxt)
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{
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return emulate_store_desc_ptr(ctxt, ctxt->ops->get_idt);
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}
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static int em_lgdt(struct x86_emulate_ctxt *ctxt)
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{
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struct desc_ptr desc_ptr;
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@ -3485,8 +3514,8 @@ static struct opcode group6[] = {
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};
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static struct group_dual group7 = { {
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DI(Mov | DstMem | Priv, sgdt),
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DI(Mov | DstMem | Priv, sidt),
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II(Mov | DstMem | Priv, em_sgdt, sgdt),
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II(Mov | DstMem | Priv, em_sidt, sidt),
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II(SrcMem | Priv, em_lgdt, lgdt),
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II(SrcMem | Priv, em_lidt, lidt),
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II(SrcNone | DstMem | Mov, em_smsw, smsw), N,
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