arm: do not set max_vcpus = 8 in arch_domain_create.

XEN_DOMCTL_max_vcpus cannot reduce max_vcpus and therefore we can't create a
smaller guest.

The limit of 8 (due to GIC limits) should be expressed in MAX_VIRT_CPUS.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>

xen/arch/arm/domain.c

@@ -212,8 +212,6 @@ int arch_domain_create(struct domain *d, unsigned int domcr_flags)
             goto fail;
     }
 
-    d->max_vcpus = 8;
-
     if ( (rc = domain_vgic_init(d)) != 0 )
         goto fail;
 

xen/include/asm-arm/config.h

@@ -27,7 +27,7 @@
 #define NR_CPUS 128
 #endif
 
-#define MAX_VIRT_CPUS 128 /* XXX */
+#define MAX_VIRT_CPUS 8
 #define MAX_HVM_VCPUS MAX_VIRT_CPUS
 
 #define asmlinkage /* Nothing needed */