diff mbox

[4/9] KVM: SVM: Add intercept checks for descriptor table accesses

Message ID 1290622715-8382-5-git-send-email-joerg.roedel@amd.com (mailing list archive)
State New, archived
Headers show

Commit Message

Joerg Roedel Nov. 24, 2010, 6:18 p.m. UTC 
None
diff mbox

Patch

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 16ff569..035c5b5 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -3636,12 +3636,40 @@  static int svm_insn_intercepted(struct kvm_vcpu *vcpu,
 		goto out;
 
 	switch (c->b) {
+	case 0x00:
+		switch (c->modrm_reg) {
+		case 0x00: /* SLDT */
+			vmcb->control.exit_code = SVM_EXIT_LDTR_READ;
+			break;
+		case 0x01: /* STR */
+			vmcb->control.exit_code = SVM_EXIT_TR_READ;
+			break;
+		case 0x02: /* LLDT */
+			vmcb->control.exit_code = SVM_EXIT_LDTR_WRITE;
+			break;
+		case 0x03: /* LTR */
+			vmcb->control.exit_code = SVM_EXIT_TR_WRITE;
+			break;
+		}
+		break;
 	case 0x01:
 		/* 0x0f 0x01 and modrm_mod == 3 encodes special instructions */
 		if (c->modrm_mod == 3)
 			break;
 
 		switch (c->modrm_reg) {
+		case 0x00: /* SGDT */
+			vmcb->control.exit_code = SVM_EXIT_GDTR_READ;
+			break;
+		case 0x01: /* SIDT */
+			vmcb->control.exit_code = SVM_EXIT_IDTR_READ;
+			break;
+		case 0x02: /* LGDT */
+			vmcb->control.exit_code = SVM_EXIT_GDTR_WRITE;
+			break;
+		case 0x03: /* LIDT */
+			vmcb->control.exit_code = SVM_EXIT_IDTR_WRITE;
+			break;
 		case 0x04: /* SMSW */
 			vmcb->control.exit_code = SVM_EXIT_READ_CR0;
 			break;