5cad61a6ba
The find_unbound_pirq is called only from xen_allocate_pirq_msi and only if alloc_pirq is true. The only caller which does this is xen_hvm_setup_msi_irqs. The use of this function is gated, in pci_xen_hvm_init, on XENFEAT_hvm_pirqs. The PHYSDEVOP_get_free_pirq interfaces was added to the hypervisor in 22410:be96f6058c05 while XENFEAT_hvm_pirqs was added a couple of minutes prior in 22409:6663214f06ac. Therefore we do not need to concern ourselves with hypervisors which support XENFEAT_hvm_pirqs but not PHYSDEVOP_get_free_pirq. This eliminates the fallback path in find_unbound_pirq which walks to pirq_to_irq array looking for a free pirq. Unlike the PHYSDEVOP_get_free_pirq interface this fallback only looks up a free pirq but does not reserve it. Removing this fallback will simplify locking in the future. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> |
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| .. | ||
| xenbus | ||
| xenfs | ||
| Kconfig | ||
| Makefile | ||
| balloon.c | ||
| biomerge.c | ||
| cpu_hotplug.c | ||
| events.c | ||
| evtchn.c | ||
| features.c | ||
| gntdev.c | ||
| grant-table.c | ||
| manage.c | ||
| pci.c | ||
| platform-pci.c | ||
| swiotlb-xen.c | ||
| sys-hypervisor.c | ||
| xencomm.c | ||