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authorJan Kiszka <jan.kiszka@siemens.com>2010-11-16 22:30:05 +0100
committerAvi Kivity <avi@redhat.com>2011-01-12 11:29:22 +0200
commited78661f2614d3c9f69c23e280db3bafdabdf5bb (patch)
tree7344bdb2ae1ca07dcb2c4bf76e4618c1c65d47a9 /virt
parent1e001d49f9f9a0e3eb72939ad49d9a2c7754e9c1 (diff)
downloadlinux-2.6.38-lt-ux500-ed78661f2614d3c9f69c23e280db3bafdabdf5bb.tar.gz
KVM: Save/restore state of assigned PCI device
The guest may change states that pci_reset_function does not touch. So we better save/restore the assigned device across guest usage. Acked-by: Alex Williamson <alex.williamson@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/assigned-dev.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/virt/kvm/assigned-dev.c b/virt/kvm/assigned-dev.c
index 7623408dbc8..d3892076f93 100644
--- a/virt/kvm/assigned-dev.c
+++ b/virt/kvm/assigned-dev.c
@@ -197,7 +197,8 @@ static void kvm_free_assigned_device(struct kvm *kvm,
{
kvm_free_assigned_irq(kvm, assigned_dev);
- pci_reset_function(assigned_dev->dev);
+ __pci_reset_function(assigned_dev->dev);
+ pci_restore_state(assigned_dev->dev);
pci_release_regions(assigned_dev->dev);
pci_disable_device(assigned_dev->dev);
@@ -514,6 +515,7 @@ static int kvm_vm_ioctl_assign_device(struct kvm *kvm,
}
pci_reset_function(dev);
+ pci_save_state(dev);
match->assigned_dev_id = assigned_dev->assigned_dev_id;
match->host_segnr = assigned_dev->segnr;
@@ -544,6 +546,7 @@ out:
mutex_unlock(&kvm->lock);
return r;
out_list_del:
+ pci_restore_state(dev);
list_del(&match->list);
pci_release_regions(dev);
out_disable: