KVM: x86 emulator: emulate SGDT/SIDT (96051572) · Commits · 戴 / test

arch/x86/kvm/emulate.c

+31 −2

Original line number	Diff line number	Diff line
		@@ -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,