From 4b71bd9e25cbf932ff02b04b9db31458481b3209 Mon Sep 17 00:00:00 2001
From: Weidong Han <weidong.han@intel.com>
Date: Thu, 21 May 2009 17:08:38 -0700
Subject: [PATCH 09/15] kvm: libkvm: add deassign ioctl

Add this to support hot remove assigned device.

Acked-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Weidong Han <weidong.han@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
(cherry picked from commit 0512290fa039bfb8254df33bd5e1a8407add4211)
Signed-off-by: Chris Wright <chrisw@redhat.com>
Bugzilla: 498084
Message-Id: <1242950924-30161-8-git-send-email-chrisw@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
RH-Upstream-status: applied
Acked-by: Juan Quintela <quintela@redhat.com>
Acked-by: Marcelo Tosatti <mtosatti@redhat.com>
Acked-by: Don Dutile <ddutile@redhat.com>
---
 libkvm/libkvm.c |   14 ++++++++++++++
 libkvm/libkvm.h |   13 +++++++++++++
 2 files changed, 27 insertions(+), 0 deletions(-)

diff --git a/libkvm/libkvm.c b/libkvm/libkvm.c
index 9233207..5ffb01f 100644
--- a/libkvm/libkvm.c
+++ b/libkvm/libkvm.c
@@ -1154,6 +1154,20 @@ int kvm_assign_irq(kvm_context_t kvm,
 }
 #endif
 
+#ifdef KVM_CAP_DEVICE_DEASSIGNMENT
+int kvm_deassign_pci_device(kvm_context_t kvm,
+			    struct kvm_assigned_pci_dev *assigned_dev)
+{
+	int ret;
+
+	ret = ioctl(kvm->vm_fd, KVM_DEASSIGN_PCI_DEVICE, assigned_dev);
+	if (ret < 0)
+		return -errno;
+
+	return ret;
+}
+#endif
+
 int kvm_destroy_memory_region_works(kvm_context_t kvm)
 {
 	int ret = 0;
diff --git a/libkvm/libkvm.h b/libkvm/libkvm.h
index 40275d7..87dded7 100644
--- a/libkvm/libkvm.h
+++ b/libkvm/libkvm.h
@@ -721,6 +721,19 @@ int kvm_assign_irq(kvm_context_t kvm,
 int kvm_destroy_memory_region_works(kvm_context_t kvm);
 #endif
 
+#ifdef KVM_CAP_DEVICE_DEASSIGNMENT
+/*!
+ * \brief Notifies host kernel about a PCI device to be deassigned from a guest
+ *
+ * Used for hot remove PCI device, this function notifies the host
+ * kernel about the deassigning of the physical PCI device from a guest.
+ *
+ * \param kvm Pointer to the current kvm_context
+ * \param assigned_dev Parameters, like bus, devfn number, etc
+ */
+int kvm_deassign_pci_device(kvm_context_t kvm,
+			    struct kvm_assigned_pci_dev *assigned_dev);
+#endif
 
 /*!
  * \brief Checks whether the generic irq routing capability is present
-- 
1.6.3.rc4.29.g8146