[Xen-devel] [RFC PATCH 49/49] ARM: VGIC: wire new VGIC(-v2) files into Xen build system

[Andre Przywara <andre.przywara@xxxxxxxxxx>]

Now that we have both the old VGIC prepared to cope with a sibling and
the code for the new VGIC in place, lets add a Kconfig option to enable
the new code and wire it into the Xen build system.
This will add a compile time option to use either the "old" or the "new"
VGIC.
In the moment this is restricted to a vGIC-v2. To make the build system
happy, we provide a temporary dummy implementation of
vgic_v3_setup_hw() to allow building for now.

Signed-off-by: Andre Przywara <andre.przywara@xxxxxxxxxx>
---
 xen/arch/arm/Kconfig     |  6 +++++-
 xen/arch/arm/Makefile    | 10 +++++++++-
 xen/arch/arm/vgic/vgic.c |  8 ++++++++
 xen/common/Makefile      |  1 +
 4 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/xen/arch/arm/Kconfig b/xen/arch/arm/Kconfig
index 2782ee6589..aad19927ce 100644
--- a/xen/arch/arm/Kconfig
+++ b/xen/arch/arm/Kconfig
@@ -48,7 +48,11 @@ config HAS_GICV3
 config HAS_ITS
         bool
         prompt "GICv3 ITS MSI controller support" if EXPERT = "y"
-        depends on HAS_GICV3
+        depends on HAS_GICV3 && !NEW_VGIC
+
+config NEW_VGIC
+        bool
+        prompt "Use new VGIC implementation"
 
 config SBSA_VUART_CONSOLE
        bool "Emulated SBSA UART console support"
diff --git a/xen/arch/arm/Makefile b/xen/arch/arm/Makefile
index 41d7366527..2a3ec94a18 100644
--- a/xen/arch/arm/Makefile
+++ b/xen/arch/arm/Makefile
@@ -16,7 +16,6 @@ obj-y += domain_build.o
 obj-y += domctl.o
 obj-$(EARLY_PRINTK) += early_printk.o
 obj-y += gic.o
-obj-y += gic-vgic.o
 obj-y += gic-v2.o
 obj-$(CONFIG_HAS_GICV3) += gic-v3.o
 obj-$(CONFIG_HAS_ITS) += gic-v3-its.o
@@ -47,10 +46,19 @@ obj-y += sysctl.o
 obj-y += time.o
 obj-y += traps.o
 obj-y += vcpreg.o
+ifeq ($(CONFIG_NEW_VGIC),y)
+obj-y += vgic/vgic.o
+obj-y += vgic/vgic-v2.o
+obj-y += vgic/vgic-mmio.o
+obj-y += vgic/vgic-mmio-v2.o
+obj-y += vgic/vgic-init.o
+else
+obj-y += gic-vgic.o
 obj-y += vgic.o
 obj-y += vgic-v2.o
 obj-$(CONFIG_HAS_GICV3) += vgic-v3.o
 obj-$(CONFIG_HAS_ITS) += vgic-v3-its.o
+endif
 obj-y += vm_event.o
 obj-y += vtimer.o
 obj-$(CONFIG_SBSA_VUART_CONSOLE) += vpl011.o
diff --git a/xen/arch/arm/vgic/vgic.c b/xen/arch/arm/vgic/vgic.c
index 77fa756329..690ae892e0 100644
--- a/xen/arch/arm/vgic/vgic.c
+++ b/xen/arch/arm/vgic/vgic.c
@@ -853,6 +853,14 @@ int vgic_connect_hw_irq(struct domain *d, struct vcpu 
*vcpu,
     return ret;
 }
 
+void vgic_v3_setup_hw(paddr_t dbase,
+                      unsigned int nr_rdist_regions,
+                      const struct rdist_region *regions,
+                      unsigned int intid_bits)
+{
+    /* Dummy implementation to allow building without actual vGICv3 support. */
+}
+
 /*
  * Local variables:
  * mode: C
diff --git a/xen/common/Makefile b/xen/common/Makefile
index 3a349f478b..92a1d1fa58 100644
--- a/xen/common/Makefile
+++ b/xen/common/Makefile
@@ -19,6 +19,7 @@ obj-y += keyhandler.o
 obj-$(CONFIG_KEXEC) += kexec.o
 obj-$(CONFIG_KEXEC) += kimage.o
 obj-y += lib.o
+obj-$(CONFIG_NEW_VGIC) += list_sort.o
 obj-$(CONFIG_LIVEPATCH) += livepatch.o livepatch_elf.o
 obj-y += lzo.o
 obj-$(CONFIG_HAS_MEM_ACCESS) += mem_access.o
-- 
2.14.1


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