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authorKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2011-04-14 17:17:36 +0200
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2011-04-14 17:17:36 +0200
commitbeafbdc1df02877612dc9039c1de0639921fddec (patch)
tree6103bd53db2858462c38bcf03b36eb7aad701576 /arch
parentxen/pci: Add xen_[find|register|unregister]_device_domain_owner functions. (diff)
downloadlinux-beafbdc1df02877612dc9039c1de0639921fddec.tar.xz
linux-beafbdc1df02877612dc9039c1de0639921fddec.zip
xen/irq: Check if the PCI device is owned by a domain different than DOMID_SELF.
We check if there is a domain owner for the PCI device. In case of failure (meaning no domain has registered for this device) we make DOMID_SELF the owner. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> [v2: deal with rebasing on v2.6.37-1] [v3: deal with rebasing on stable/irq.cleanup] [v4: deal with rebasing on stable/irq.ween_of_nr_irqs] [v5: deal with rebasing on v2.6.39-rc3] Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Acked-by: Xiantao Zhang <xiantao.zhang@intel.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/pci/xen.c21
1 files changed, 16 insertions, 5 deletions
diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c
index 6075f2d65335..393981feb12f 100644
--- a/arch/x86/pci/xen.c
+++ b/arch/x86/pci/xen.c
@@ -108,7 +108,8 @@ static int xen_hvm_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
}
irq = xen_bind_pirq_msi_to_irq(dev, msidesc, pirq, 0,
(type == PCI_CAP_ID_MSIX) ?
- "msi-x" : "msi");
+ "msi-x" : "msi",
+ DOMID_SELF);
if (irq < 0)
goto error;
dev_dbg(&dev->dev,
@@ -148,7 +149,8 @@ static int xen_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
irq = xen_bind_pirq_msi_to_irq(dev, msidesc, v[i], 0,
(type == PCI_CAP_ID_MSIX) ?
"pcifront-msi-x" :
- "pcifront-msi");
+ "pcifront-msi",
+ DOMID_SELF);
if (irq < 0)
goto free;
i++;
@@ -190,9 +192,16 @@ static int xen_initdom_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
list_for_each_entry(msidesc, &dev->msi_list, list) {
struct physdev_map_pirq map_irq;
+ domid_t domid;
+
+ domid = ret = xen_find_device_domain_owner(dev);
+ /* N.B. Casting int's -ENODEV to uint16_t results in 0xFFED,
+ * hence check ret value for < 0. */
+ if (ret < 0)
+ domid = DOMID_SELF;
memset(&map_irq, 0, sizeof(map_irq));
- map_irq.domid = DOMID_SELF;
+ map_irq.domid = domid;
map_irq.type = MAP_PIRQ_TYPE_MSI;
map_irq.index = -1;
map_irq.pirq = -1;
@@ -215,14 +224,16 @@ static int xen_initdom_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
ret = HYPERVISOR_physdev_op(PHYSDEVOP_map_pirq, &map_irq);
if (ret) {
- dev_warn(&dev->dev, "xen map irq failed %d\n", ret);
+ dev_warn(&dev->dev, "xen map irq failed %d for %d domain\n",
+ ret, domid);
goto out;
}
ret = xen_bind_pirq_msi_to_irq(dev, msidesc,
map_irq.pirq, map_irq.index,
(type == PCI_CAP_ID_MSIX) ?
- "msi-x" : "msi");
+ "msi-x" : "msi",
+ domid);
if (ret < 0)
goto out;
}