irqchip/gicv3-its: Sets IRQ_DOMAIN_FLAG_MSI_REMAP

The GICv3 ITS is MSI remapping capable. Let's advertise
this property so that VFIO passthrough can assess IRQ safety.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Tomasz Nowicki <tomasz.nowicki@caviumnetworks.com>
Tested-by: Tomasz Nowicki <tomasz.nowicki@caviumnetworks.com>
Tested-by: Bharat Bhushan <bharat.bhushan@nxp.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from commit 59768527db3de41afb0586e677e322012e6a392b)
Signed-off-by: dann frazier <dann.frazier@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 69b040f47d56a852f5a2af8b77b595442b70d2ad..9d4fefc598279d57e15952b8a54772a2837e239e 100644 (file)
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -1642,6 +1642,7 @@ static int its_init_domain(struct fwnode_handle *handle, struct its_node *its)
 
        inner_domain->parent = its_parent;
        inner_domain->bus_token = DOMAIN_BUS_NEXUS;
+       inner_domain->flags |= IRQ_DOMAIN_FLAG_MSI_REMAP;
        info->ops = &its_msi_domain_ops;
        info->data = its;
        inner_domain->host_data = info;