From f4f8fe65da54853fc303701ad986ad8c03031b19 Mon Sep 17 00:00:00 2001
From: Avi Kivity <avi@qumranet.com>
Date: Wed, 20 Aug 2008 15:51:42 +0300
Subject: [PATCH] --- yaml --- r: 115281 b: refs/heads/master c:
 f4bbd9aaaae23007e4d79536d35a30cbbb11d407 h: refs/heads/master i:   115279:
 c6f804844093292aaab2bcc9433a5e3953c188c8 v: v3

---
 [refs]                   |  2 +-
 trunk/arch/x86/kvm/x86.c | 22 ++++++++++++++++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 6bc4a7d07c31..5141f0fef527 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: a16b20da879430fdf245ed45461ed40ffef8db3c
+refs/heads/master: f4bbd9aaaae23007e4d79536d35a30cbbb11d407
diff --git a/trunk/arch/x86/kvm/x86.c b/trunk/arch/x86/kvm/x86.c
index 22edd95712ee..bfc7c332c5d7 100644
--- a/trunk/arch/x86/kvm/x86.c
+++ b/trunk/arch/x86/kvm/x86.c
@@ -3588,11 +3588,33 @@ static int load_segment_descriptor_to_kvm_desct(struct kvm_vcpu *vcpu,
 	return 0;
 }
 
+int kvm_load_realmode_segment(struct kvm_vcpu *vcpu, u16 selector, int seg)
+{
+	struct kvm_segment segvar = {
+		.base = selector << 4,
+		.limit = 0xffff,
+		.selector = selector,
+		.type = 3,
+		.present = 1,
+		.dpl = 3,
+		.db = 0,
+		.s = 1,
+		.l = 0,
+		.g = 0,
+		.avl = 0,
+		.unusable = 0,
+	};
+	kvm_x86_ops->set_segment(vcpu, &segvar, seg);
+	return 0;
+}
+
 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
 				int type_bits, int seg)
 {
 	struct kvm_segment kvm_seg;
 
+	if (!(vcpu->arch.cr0 & X86_CR0_PE))
+		return kvm_load_realmode_segment(vcpu, selector, seg);
 	if (load_segment_descriptor_to_kvm_desct(vcpu, selector, &kvm_seg))
 		return 1;
 	kvm_seg.type |= type_bits;