[PATCH v4 1/3] xen/arm: gic: acpi: Guard helpers to build the MADT with CONFIG_ACPI

[Julien Grall <julien@xen.org>]

From: Julien Grall <jgrall@amazon.com>

gic_make_hwdom_madt() and gic_get_hwdom_madt_size() are ACPI specific.

While they build fine today, this will change in a follow-up patch.
Rather than trying to fix the build on ACPI, it is best to avoid
compiling the helpers and the associated callbacks when CONFIG_ACPI=n.

Signed-off-by: Julien Grall <jgrall@amazon.com>

---
    Changes in v4:
        - Patch added
---
 xen/arch/arm/gic-v2.c     |  8 +++-----
 xen/arch/arm/gic-v3.c     | 11 ++---------
 xen/arch/arm/gic.c        |  2 ++
 xen/include/asm-arm/gic.h | 10 ++++++++--
 4 files changed, 15 insertions(+), 16 deletions(-)

diff --git a/xen/arch/arm/gic-v2.c b/xen/arch/arm/gic-v2.c
index 0f747538dbcd..581ea5ba6b2c 100644
--- a/xen/arch/arm/gic-v2.c
+++ b/xen/arch/arm/gic-v2.c
@@ -1114,12 +1114,12 @@ static int gicv2_iomem_deny_access(const struct domain *d)
     return iomem_deny_access(d, mfn, mfn + nr);
 }
 
+#ifdef CONFIG_ACPI
 static unsigned long gicv2_get_hwdom_extra_madt_size(const struct domain *d)
 {
     return 0;
 }
 
-#ifdef CONFIG_ACPI
 static int gicv2_make_hwdom_madt(const struct domain *d, u32 offset)
 {
     struct acpi_subtable_header *header;
@@ -1248,10 +1248,6 @@ static void __init gicv2_acpi_init(void)
 }
 #else
 static void __init gicv2_acpi_init(void) { }
-static int gicv2_make_hwdom_madt(const struct domain *d, u32 offset)
-{
-    return 0;
-}
 #endif
 
 static int __init gicv2_init(void)
@@ -1357,8 +1353,10 @@ const static struct gic_hw_operations gicv2_ops = {
     .read_apr            = gicv2_read_apr,
     .read_pending_state  = gicv2_read_pending_state,
     .make_hwdom_dt_node  = gicv2_make_hwdom_dt_node,
+#ifdef CONFIG_ACPI
     .make_hwdom_madt     = gicv2_make_hwdom_madt,
     .get_hwdom_extra_madt_size = gicv2_get_hwdom_extra_madt_size,
+#endif
     .map_hwdom_extra_mappings = gicv2_map_hwdown_extra_mappings,
     .iomem_deny_access   = gicv2_iomem_deny_access,
     .do_LPI              = gicv2_do_LPI,
diff --git a/xen/arch/arm/gic-v3.c b/xen/arch/arm/gic-v3.c
index 0f6cbf6224e9..2a344393a0e4 100644
--- a/xen/arch/arm/gic-v3.c
+++ b/xen/arch/arm/gic-v3.c
@@ -1735,15 +1735,6 @@ static void __init gicv3_acpi_init(void)
 }
 #else
 static void __init gicv3_acpi_init(void) { }
-static int gicv3_make_hwdom_madt(const struct domain *d, u32 offset)
-{
-    return 0;
-}
-
-static unsigned long gicv3_get_hwdom_extra_madt_size(const struct domain *d)
-{
-    return 0;
-}
 #endif
 
 static bool gic_dist_supports_lpis(void)
@@ -1858,8 +1849,10 @@ static const struct gic_hw_operations gicv3_ops = {
     .read_pending_state  = gicv3_read_pending_state,
     .secondary_init      = gicv3_secondary_cpu_init,
     .make_hwdom_dt_node  = gicv3_make_hwdom_dt_node,
+#ifdef CONFIG_ACPI
     .make_hwdom_madt     = gicv3_make_hwdom_madt,
     .get_hwdom_extra_madt_size = gicv3_get_hwdom_extra_madt_size,
+#endif
     .iomem_deny_access   = gicv3_iomem_deny_access,
     .do_LPI              = gicv3_do_LPI,
 };
diff --git a/xen/arch/arm/gic.c b/xen/arch/arm/gic.c
index d623c57cb9fa..fe60619e99cf 100644
--- a/xen/arch/arm/gic.c
+++ b/xen/arch/arm/gic.c
@@ -443,6 +443,7 @@ int gic_make_hwdom_dt_node(const struct domain *d,
     return gic_hw_ops->make_hwdom_dt_node(d, gic, fdt);
 }
 
+#ifdef CONFIG_ACPI
 int gic_make_hwdom_madt(const struct domain *d, u32 offset)
 {
     return gic_hw_ops->make_hwdom_madt(d, offset);
@@ -459,6 +460,7 @@ unsigned long gic_get_hwdom_madt_size(const struct domain *d)
 
     return madt_size;
 }
+#endif
 
 int gic_iomem_deny_access(const struct domain *d)
 {
diff --git a/xen/include/asm-arm/gic.h b/xen/include/asm-arm/gic.h
index ba870523bb2a..ad0f7452d005 100644
--- a/xen/include/asm-arm/gic.h
+++ b/xen/include/asm-arm/gic.h
@@ -378,12 +378,14 @@ struct gic_hw_operations {
     /* Create GIC node for the hardware domain */
     int (*make_hwdom_dt_node)(const struct domain *d,
                               const struct dt_device_node *gic, void *fdt);
+#ifdef CONFIG_ACPI
     /* Create MADT table for the hardware domain */
     int (*make_hwdom_madt)(const struct domain *d, u32 offset);
-    /* Map extra GIC MMIO, irqs and other hw stuffs to the hardware domain. */
-    int (*map_hwdom_extra_mappings)(struct domain *d);
     /* Query the size of hardware domain madt table */
     unsigned long (*get_hwdom_extra_madt_size)(const struct domain *d);
+#endif
+    /* Map extra GIC MMIO, irqs and other hw stuffs to the hardware domain. */
+    int (*map_hwdom_extra_mappings)(struct domain *d);
     /* Deny access to GIC regions */
     int (*iomem_deny_access)(const struct domain *d);
     /* Handle LPIs, which require special handling */
@@ -435,8 +437,12 @@ void register_gic_ops(const struct gic_hw_operations *ops);
 int gic_make_hwdom_dt_node(const struct domain *d,
                            const struct dt_device_node *gic,
                            void *fdt);
+
+#ifdef CONFIG_ACPI
 int gic_make_hwdom_madt(const struct domain *d, u32 offset);
 unsigned long gic_get_hwdom_madt_size(const struct domain *d);
+#endif
+
 int gic_map_hwdom_extra_mappings(struct domain *d);
 int gic_iomem_deny_access(const struct domain *d);
 
-- 
2.17.1