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xen/irq: Check if the PCI device is owned by a domain different than DOMID_SELF.

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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>
This commit is contained in:
Konrad Rzeszutek Wilk 2011-04-14 11:17:36 -04:00
parent c55fa78b13
commit beafbdc1df
3 changed files with 26 additions and 10 deletions
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21
arch/x86/pci/xen.c
View file

@ -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;
}

12
drivers/xen/events.c
View file

@ -101,6 +101,7 @@ struct irq_info
unsigned short gsi;
unsigned char vector;
unsigned char flags;
uint16_t domid;
} pirq;
} u;
};
@ -184,6 +185,7 @@ static void xen_irq_info_pirq_init(unsigned irq,
unsigned short pirq,
unsigned short gsi,
unsigned short vector,
uint16_t domid,
unsigned char flags)
{
struct irq_info *info = info_for_irq(irq);
@ -193,6 +195,7 @@ static void xen_irq_info_pirq_init(unsigned irq,
info->u.pirq.pirq = pirq;
info->u.pirq.gsi = gsi;
info->u.pirq.vector = vector;
info->u.pirq.domid = domid;
info->u.pirq.flags = flags;
}
@ -655,7 +658,7 @@ int xen_bind_pirq_gsi_to_irq(unsigned gsi,
goto out;
}
xen_irq_info_pirq_init(irq, 0, pirq, gsi, irq_op.vector,
xen_irq_info_pirq_init(irq, 0, pirq, gsi, irq_op.vector, DOMID_SELF,
shareable ? PIRQ_SHAREABLE : 0);
out:
@ -680,7 +683,8 @@ int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc)
}
int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
int pirq, int vector, const char *name)
int pirq, int vector, const char *name,
domid_t domid)
{
int irq, ret;
@ -693,7 +697,7 @@ int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
irq_set_chip_and_handler_name(irq, &xen_pirq_chip, handle_level_irq,
name);
xen_irq_info_pirq_init(irq, 0, pirq, 0, vector, 0);
xen_irq_info_pirq_init(irq, 0, pirq, 0, vector, domid, 0);
ret = irq_set_msi_desc(irq, msidesc);
if (ret < 0)
goto error_irq;
@ -722,7 +726,7 @@ int xen_destroy_irq(int irq)
if (xen_initial_domain()) {
unmap_irq.pirq = info->u.pirq.pirq;
unmap_irq.domid = DOMID_SELF;
unmap_irq.domid = info->u.pirq.domid;
rc = HYPERVISOR_physdev_op(PHYSDEVOP_unmap_pirq, &unmap_irq);
if (rc) {
printk(KERN_WARNING "unmap irq failed %d\n", rc);

3
include/xen/events.h
View file

@ -85,7 +85,8 @@ int xen_bind_pirq_gsi_to_irq(unsigned gsi,
int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc);
/* Bind an PSI pirq to an irq. */
int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
int pirq, int vector, const char *name);
int pirq, int vector, const char *name,
domid_t domid);
#endif
/* De-allocates the above mentioned physical interrupt. */