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Diffstat (limited to 'arch/x86/kvm/x86.c')
-rw-r--r--arch/x86/kvm/x86.c54
1 files changed, 54 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 84ffd95..efeeabd 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1548,6 +1548,7 @@ int kvm_dev_ioctl_check_extension(long ext)
case KVM_CAP_HYPERV_VAPIC:
case KVM_CAP_HYPERV_SPIN:
case KVM_CAP_PCI_SEGMENT:
+ case KVM_CAP_DEBUGREGS:
case KVM_CAP_X86_ROBUST_SINGLESTEP:
r = 1;
break;
@@ -2165,6 +2166,36 @@ static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu,
return 0;
}
+static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu,
+ struct kvm_debugregs *dbgregs)
+{
+ vcpu_load(vcpu);
+
+ memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db));
+ dbgregs->dr6 = vcpu->arch.dr6;
+ dbgregs->dr7 = vcpu->arch.dr7;
+ dbgregs->flags = 0;
+
+ vcpu_put(vcpu);
+}
+
+static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu,
+ struct kvm_debugregs *dbgregs)
+{
+ if (dbgregs->flags)
+ return -EINVAL;
+
+ vcpu_load(vcpu);
+
+ memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db));
+ vcpu->arch.dr6 = dbgregs->dr6;
+ vcpu->arch.dr7 = dbgregs->dr7;
+
+ vcpu_put(vcpu);
+
+ return 0;
+}
+
long kvm_arch_vcpu_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg)
{
@@ -2343,6 +2374,29 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events);
break;
}
+ case KVM_GET_DEBUGREGS: {
+ struct kvm_debugregs dbgregs;
+
+ kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs);
+
+ r = -EFAULT;
+ if (copy_to_user(argp, &dbgregs,
+ sizeof(struct kvm_debugregs)))
+ break;
+ r = 0;
+ break;
+ }
+ case KVM_SET_DEBUGREGS: {
+ struct kvm_debugregs dbgregs;
+
+ r = -EFAULT;
+ if (copy_from_user(&dbgregs, argp,
+ sizeof(struct kvm_debugregs)))
+ break;
+
+ r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs);
+ break;
+ }
default:
r = -EINVAL;
}