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xen: Utilize the restore_msi_irqs hook.

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to make a hypercall to restore the vectors in the MSI/MSI-X
configuration space.

Signed-off-by: Tang Liang <liang.tang@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Tang Liang 2011-12-08 17:36:39 +08:00 committed by Konrad Rzeszutek Wilk
parent 7b67e75147
commit 8605c6844f
2 changed files with 34 additions and 0 deletions
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27
arch/x86/pci/xen.c
View File

@ -324,6 +324,32 @@ static int xen_initdom_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
out:
return ret;
}
static void xen_initdom_restore_msi_irqs(struct pci_dev *dev, int irq)
{
int ret = 0;
if (pci_seg_supported) {
struct physdev_pci_device restore_ext;
restore_ext.seg = pci_domain_nr(dev->bus);
restore_ext.bus = dev->bus->number;
restore_ext.devfn = dev->devfn;
ret = HYPERVISOR_physdev_op(PHYSDEVOP_restore_msi_ext,
&restore_ext);
if (ret == -ENOSYS)
pci_seg_supported = false;
WARN(ret && ret != -ENOSYS, "restore_msi_ext -> %d\n", ret);
}
if (!pci_seg_supported) {
struct physdev_restore_msi restore;
restore.bus = dev->bus->number;
restore.devfn = dev->devfn;
ret = HYPERVISOR_physdev_op(PHYSDEVOP_restore_msi, &restore);
WARN(ret && ret != -ENOSYS, "restore_msi -> %d\n", ret);
}
}
#endif
static void xen_teardown_msi_irqs(struct pci_dev *dev)
@ -446,6 +472,7 @@ int __init pci_xen_initial_domain(void)
#ifdef CONFIG_PCI_MSI
x86_msi.setup_msi_irqs = xen_initdom_setup_msi_irqs;
x86_msi.teardown_msi_irq = xen_teardown_msi_irq;
x86_msi.restore_msi_irqs = xen_initdom_restore_msi_irqs;
#endif
xen_setup_acpi_sci();
__acpi_register_gsi = acpi_register_gsi_xen;

7
include/xen/interface/physdev.h
View File

@ -145,6 +145,13 @@ struct physdev_manage_pci {
uint8_t devfn;
};
#define PHYSDEVOP_restore_msi 19
struct physdev_restore_msi {
/* IN */
uint8_t bus;
uint8_t devfn;
};
#define PHYSDEVOP_manage_pci_add_ext 20
struct physdev_manage_pci_ext {
/* IN */