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xen: support GSI -> pirq remapping in PV on HVM guests

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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>
This commit is contained in:
Stefano Stabellini
2010-06-24 17:50:18 +01:00
parent 90f6881e64
commit 3942b740e5
4 changed files with 29 additions and 1 deletions
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6
drivers/xen/events.c
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@@ -623,7 +623,8 @@ int xen_map_pirq_gsi(unsigned pirq, unsigned gsi, int shareable, char *name)
/* 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 @@ void __init xen_init_IRQ(void)
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());
}