xen/arm: dom0less hwdom construction

When creating a hardware domain, have the dom0less code call
construct_hwdom() which is shared with the dom0 code.  The hardware
domain requires building that best matches the dom0 build path.  Re-use
it to keep them in sync.

The device tree node of the dom0less config is now passed into
construct_hwdom().  dom0 uses /chosen for process_shm while a hwdom will
use the value from its dom0less device tree node.

Signed-off-by: Jason Andryuk <jason.andryuk@amd.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>

xen/arch/arm/dom0less-build.c

@@ -929,6 +929,14 @@ static int __init construct_domU(struct domain *d,
     /* type must be set before allocate memory */
     d->arch.type = kinfo.type;
 #endif
+    if ( is_hardware_domain(d) )
+    {
+        rc = construct_hwdom(&kinfo, node);
+        if ( rc < 0 )
+            return rc;
+    }
+    else
+    {
         if ( !dt_find_property(node, "xen,static-mem", NULL) )
             allocate_memory(d, &kinfo);
         else if ( !is_domain_direct_mapped(d) )
@@ -959,6 +967,7 @@ static int __init construct_domU(struct domain *d,
         rc = construct_domain(d, &kinfo);
         if ( rc < 0 )
             return rc;
+    }
 
     domain_vcpu_affinity(d, node);
 

xen/arch/arm/domain_build.c

@@ -2305,10 +2305,11 @@ static int __init construct_dom0(struct domain *d)
     if ( rc < 0 )
         return rc;
 
-    return construct_hwdom(&kinfo);
+    return construct_hwdom(&kinfo, NULL);
 }
 
-int __init construct_hwdom(struct kernel_info *kinfo)
+int __init construct_hwdom(struct kernel_info *kinfo,
+                           const struct dt_device_node *node)
 {
     struct domain *d = kinfo->d;
     int rc;
@@ -2327,7 +2328,7 @@ int __init construct_hwdom(struct kernel_info *kinfo)
 
     if ( acpi_disabled )
     {
-        rc = process_shm(d, kinfo, NULL);
+        rc = process_shm(d, kinfo, node);
         if ( rc < 0 )
             return rc;
     }

xen/arch/arm/include/asm/domain_build.h

@@ -13,7 +13,8 @@ bool allocate_bank_memory(struct kernel_info *kinfo, gfn_t sgfn,
                           paddr_t tot_size);
 void allocate_memory(struct domain *d, struct kernel_info *kinfo);
 int construct_domain(struct domain *d, struct kernel_info *kinfo);
-int construct_hwdom(struct kernel_info *kinfo);
+int construct_hwdom(struct kernel_info *kinfo,
+                    const struct dt_device_node *node);
 int domain_fdt_begin_node(void *fdt, const char *name, uint64_t unit);
 int make_chosen_node(const struct kernel_info *kinfo);
 int make_cpus_node(const struct domain *d, void *fdt);