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| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2010-06-24 16:42:04 +0100 |
|---|---|---|
| committer | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2010-10-22 21:25:41 +0100 |
| commit | 42a1de56f35a9c87932f45439dc1b09c8da0cc95 (patch) | |
| tree | 4be6a92222ef2efabd1705cd6b3adb7832f7f9a9 /arch/x86/pci | |
| parent | 01557baff6e9c371d4c96e01089dca32cf347500 (diff) | |
| download | linux-42a1de56f35a9c87932f45439dc1b09c8da0cc95.tar.gz linux-42a1de56f35a9c87932f45439dc1b09c8da0cc95.tar.bz2 linux-42a1de56f35a9c87932f45439dc1b09c8da0cc95.zip | |
xen: implement xen_hvm_register_pirq
xen_hvm_register_pirq allows the kernel to map a GSI into a Xen pirq and
receive the interrupt as an event channel from that point on.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'arch/x86/pci')
| -rw-r--r-- | arch/x86/pci/xen.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c index 4e371065ce41..08e3cdccdfa8 100644 --- a/arch/x86/pci/xen.c +++ b/arch/x86/pci/xen.c @@ -17,6 +17,44 @@ #include <xen/events.h> #include <asm/xen/pci.h> +#ifdef CONFIG_ACPI +static int xen_hvm_register_pirq(u32 gsi, int triggering) +{ + int rc, irq; + struct physdev_map_pirq map_irq; + int shareable = 0; + char *name; + + if (!xen_hvm_domain()) + return -1; + + map_irq.domid = DOMID_SELF; + map_irq.type = MAP_PIRQ_TYPE_GSI; + map_irq.index = gsi; + map_irq.pirq = -1; + + rc = HYPERVISOR_physdev_op(PHYSDEVOP_map_pirq, &map_irq); + if (rc) { + printk(KERN_WARNING "xen map irq failed %d\n", rc); + return -1; + } + + if (triggering == ACPI_EDGE_SENSITIVE) { + shareable = 0; + name = "ioapic-edge"; + } else { + shareable = 1; + name = "ioapic-level"; + } + + irq = xen_map_pirq_gsi(map_irq.pirq, gsi, shareable, name); + + printk(KERN_DEBUG "xen: --> irq=%d, pirq=%d\n", irq, map_irq.pirq); + + return irq; +} +#endif + #if defined(CONFIG_PCI_MSI) #include <linux/msi.h> |