xen: support GSI -> pirq remapping in PV on HVM guests
Disable pcifront when running on HVM: it is meant to be used with pv
guests that don't have PCI bus.
Use acpi_register_gsi_xen_hvm to remap GSIs into pirqs.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 239b011..32269bc 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -623,7 +623,8 @@
/* If we are a PV guest, we don't have GSIs (no ACPI passed). Therefore
* we are using the !xen_initial_domain() to drop in the function.*/
- if (identity_mapped_irq(gsi) || !xen_initial_domain()) {
+ if (identity_mapped_irq(gsi) || (!xen_initial_domain() &&
+ xen_pv_domain())) {
irq = gsi;
irq_alloc_desc_at(irq, 0);
} else
@@ -1397,6 +1398,9 @@
if (xen_hvm_domain()) {
xen_callback_vector();
native_init_IRQ();
+ /* pci_xen_hvm_init must be called after native_init_IRQ so that
+ * __acpi_register_gsi can point at the right function */
+ pci_xen_hvm_init();
} else {
irq_ctx_init(smp_processor_id());
}
