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KVM: x86 emulator: emulate SGDT/SIDT

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Opcodes 0F 01 /0 and 0F 01 /1

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2012-06-10 17:21:18 +03:00
parent a6e3407bb1
commit 96051572c8
1 changed files with 31 additions and 2 deletions
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33
arch/x86/kvm/emulate.c
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@ -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,