powerpc/xics: Move irq_host matching into the ics backend

An upcoming new ics backend will need to implement different matching
semantics to the current ones, which are essentially the RTAS ics
backends. So move the current match into the RTAS backend, and allow
other ics backends to override.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 7 insertions, 5 deletions

diff --git a/arch/powerpc/sysdev/xics/xics-common.c b/arch/powerpc/sysdev/xics/xics-common.c
index e70175dfe322..c58844d72426 100644
--- a/arch/powerpc/sysdev/xics/xics-common.c
+++ b/arch/powerpc/sysdev/xics/xics-common.c
@@ -331,11 +331,13 @@ int xics_get_irq_server(unsigned int virq, const struct cpumask *cpumask,
 
 static int xics_host_match(struct irq_host *h, struct device_node *node)
 {
-        /* IBM machines have interrupt parents of various funky types for things
-         * like vdevices, events, etc... The trick we use here is to match
-         * everything here except the legacy 8259 which is compatible "chrp,iic"
-         */
-        return !of_device_is_compatible(node, "chrp,iic");
+        struct ics *ics;
+
+        list_for_each_entry(ics, &ics_list, link)
+                if (ics->host_match(ics, node))
+                        return 1;
+
+        return 0;
 }
 
 /* Dummies */