[PATCH] xen/arm: platform: Select GICV3 dependency for RCAR4

[Oleksandr Tyshchenko <Oleksandr_Tyshchenko@xxxxxxxx>]

The Renesas R-Car Gen4 platform requires the GICv3 driver,
including support for the Interrupt Translation Service (ITS).

Without explicitly selecting GICV3, it was possible to create a
configuration with RCAR4=y and GICV3=n, leading to a build failure
due to unmet dependencies.

GICv3 driver (GICV3) [Y/n/?] (NEW) n
WARNING: unmet direct dependencies detected for HAS_ITS
  Depends on [n]: GICV3 [=n] && !NEW_VGIC [=n] && !ARM_32 [=n]
  Selected by [y]:
  - RCAR4 [=y] && <choice> && ARM_64 [=y]

...

arch/arm/gic-v3-its.c: In function 'gicv3_its_map_guest_device':
arch/arm/gic-v3-its.c:729:41: error: 'struct vgic_dist' has no member named 
'its_devices'
  729 |     struct rb_node **new = &d->arch.vgic.its_devices.rb_node, *parent = 
NULL;
      |                                         ^
arch/arm/gic-v3-its.c:755:28: error: 'struct vgic_dist' has no member named 
'its_devices_lock'
  755 |     spin_lock(&d->arch.vgic.its_devices_lock);
      |                            ^
arch/arm/gic-v3-its.c:768:54: error: 'struct vgic_dist' has no member named 
'its_devices'
  768 |                 rb_erase(&temp->rbnode, &d->arch.vgic.its_devices);
      |                                                      ^
In file included from ./include/xen/sched.h:6,
                 from ./include/xen/iocap.h:10,
                 from arch/arm/gic-v3-its.c:13:

...

Fix this by adding "select GICV3" to the RCAR4 Kconfig entry.

Fixes: 336fc7a19b49 ("xen/arm: platform: Add support for R-Car Gen4")
Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
---
 xen/arch/arm/platforms/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/xen/arch/arm/platforms/Kconfig b/xen/arch/arm/platforms/Kconfig
index c8bc0bfae3..888d0b85d5 100644
--- a/xen/arch/arm/platforms/Kconfig
+++ b/xen/arch/arm/platforms/Kconfig
@@ -33,6 +33,7 @@ config RCAR3
 config RCAR4
        bool "Renesas R-Car Gen4 support"
        depends on ARM_64
+       select GICV3
        select HAS_SCIF
        select HAS_ITS
        select IPMMU_VMSA
-- 
2.34.1