From: Nadav Amit <namit@cs.technion.ac.il>
Date: Wed, 7 May 2014 12:32:49 +0000 (+0300)
Subject: KVM: vmx: handle_dr does not handle RSP correctly
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=a4ab9d0cf1ef0bf521bb69099aa464f38c71393c;p=deliverable%2Flinux.git

KVM: vmx: handle_dr does not handle RSP correctly

The RSP register is not automatically cached, causing mov DR instruction with
RSP to fail.  Instead the regular register accessing interface should be used.

Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index a5fd47e4abfc..61e818d80732 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -5143,7 +5143,7 @@ static int handle_dr(struct kvm_vcpu *vcpu)
 			return 1;
 		kvm_register_write(vcpu, reg, val);
 	} else
-		if (kvm_set_dr(vcpu, dr, vcpu->arch.regs[reg]))
+		if (kvm_set_dr(vcpu, dr, kvm_register_read(vcpu, reg)))
 			return 1;
 
 	skip_emulated_instruction(vcpu);