irqchip/gic-v4: Add VLPI configuration interface

Add the required interfaces to map, unmap and update a VLPI.

Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

diff --git a/drivers/irqchip/irq-gic-v4.c b/drivers/irqchip/irq-gic-v4.c
index d3f8b7a13d2ce4debc5c3c98f9016325476d75f1..6d33828a84a7ffa19aec81729eb021b09f06aa7e 100644 (file)
--- a/drivers/irqchip/irq-gic-v4.c
+++ b/drivers/irqchip/irq-gic-v4.c
@@ -97,3 +97,45 @@ int its_invall_vpe(struct its_vpe *vpe)
 
        return its_send_vpe_cmd(vpe, &info);
 }
+
+int its_map_vlpi(int irq, struct its_vlpi_map *map)
+{
+       struct its_cmd_info info = {
+               .cmd_type = MAP_VLPI,
+               .map      = map,
+       };
+
+       /*
+        * The host will never see that interrupt firing again, so it
+        * is vital that we don't do any lazy masking.
+        */
+       irq_set_status_flags(irq, IRQ_DISABLE_UNLAZY);
+
+       return irq_set_vcpu_affinity(irq, &info);
+}
+
+int its_get_vlpi(int irq, struct its_vlpi_map *map)
+{
+       struct its_cmd_info info = {
+               .cmd_type = GET_VLPI,
+               .map      = map,
+       };
+
+       return irq_set_vcpu_affinity(irq, &info);
+}
+
+int its_unmap_vlpi(int irq)
+{
+       irq_clear_status_flags(irq, IRQ_DISABLE_UNLAZY);
+       return irq_set_vcpu_affinity(irq, NULL);
+}
+
+int its_prop_update_vlpi(int irq, u8 config, bool inv)
+{
+       struct its_cmd_info info = {
+               .cmd_type = inv ? PROP_UPDATE_AND_INV_VLPI : PROP_UPDATE_VLPI,
+               .config   = config,
+       };
+
+       return irq_set_vcpu_affinity(irq, &info);
+}

diff --git a/include/linux/irqchip/arm-gic-v4.h b/include/linux/irqchip/arm-gic-v4.h
index 6450f3ed101f90effad8015b17f27d03d06ba025..e22f878ad01703e27491bf251594452ae725c0a6 100644 (file)
--- a/include/linux/irqchip/arm-gic-v4.h
+++ b/include/linux/irqchip/arm-gic-v4.h
@@ -95,5 +95,9 @@ int its_alloc_vcpu_irqs(struct its_vm *vm);
 void its_free_vcpu_irqs(struct its_vm *vm);
 int its_schedule_vpe(struct its_vpe *vpe, bool on);
 int its_invall_vpe(struct its_vpe *vpe);
+int its_map_vlpi(int irq, struct its_vlpi_map *map);
+int its_get_vlpi(int irq, struct its_vlpi_map *map);
+int its_unmap_vlpi(int irq);
+int its_prop_update_vlpi(int irq, u8 config, bool inv);
 
 #endif