[XEN] Fix XENVER_capabilities hypercall.

Passing an array to a function turns it into a pointer which confuses
safe_strcat.

Also fix 54->64 typo in ia64 tree.

Thanks to Alex Williamson for pointing out the problem.

Signed-off-by: Ian Campbell <ian.campbell@xensource.com>

xen/arch/ia64/xen/xensetup.c

@@ -545,21 +545,21 @@ printk("num_online_cpus=%d, max_cpus=%d\n",num_online_cpus(),max_cpus);
     startup_cpu_idle_loop();
 }
 
-void arch_get_xen_caps(xen_capabilities_info_t info)
+void arch_get_xen_caps(xen_capabilities_info_t *info)
 {
     int major = xen_major_version();
     int minor = xen_minor_version();
     char s[32];
 
-    info[0] = '\0';
+    (*info)[0] = '\0';
 
-    snprintf(s, sizeof(s), "xen-%d.%d-ia54 ", major, minor);
-    safe_strcat(info, s);
+    snprintf(s, sizeof(s), "xen-%d.%d-ia64 ", major, minor);
+    safe_strcat(*info, s);
 
     if (vmx_enabled)
     {
         snprintf(s, sizeof(s), "hvm-%d.%d-ia64 ", major, minor);
-        safe_strcat(info, s);
+        safe_strcat(*info, s);
     }
 }
 

xen/arch/powerpc/setup.c

@@ -444,8 +444,8 @@ void __init __start_xen_ppc(
 
 }
 
-extern void arch_get_xen_caps(xen_capabilities_info_t info);
-void arch_get_xen_caps(xen_capabilities_info_t info)
+extern void arch_get_xen_caps(xen_capabilities_info_t *info);
+void arch_get_xen_caps(xen_capabilities_info_t *info)
 {
 }
 

xen/arch/x86/setup.c

@@ -800,52 +800,52 @@ void __init __start_xen(multiboot_info_t *mbi)
     startup_cpu_idle_loop();
 }
 
-void arch_get_xen_caps(xen_capabilities_info_t info)
+void arch_get_xen_caps(xen_capabilities_info_t *info)
 {
     int major = xen_major_version();
     int minor = xen_minor_version();
     char s[32];
 
-    info[0] = '\0';
+    (*info)[0] = '\0';
 
 #if defined(CONFIG_X86_32) && !defined(CONFIG_X86_PAE)
 
     snprintf(s, sizeof(s), "xen-%d.%d-x86_32 ", major, minor);
-    safe_strcat(info, s);
+    safe_strcat(*info, s);
     if ( hvm_enabled )
     {
         snprintf(s, sizeof(s), "hvm-%d.%d-x86_32 ", major, minor);
-        safe_strcat(info, s);
+        safe_strcat(*info, s);
     }
 
 #elif defined(CONFIG_X86_32) && defined(CONFIG_X86_PAE)
 
     snprintf(s, sizeof(s), "xen-%d.%d-x86_32p ", major, minor);
-    safe_strcat(info, s);
+    safe_strcat(*info, s);
     if ( hvm_enabled )
     {
         snprintf(s, sizeof(s), "hvm-%d.%d-x86_32 ", major, minor);
-        safe_strcat(info, s);
+        safe_strcat(*info, s);
         snprintf(s, sizeof(s), "hvm-%d.%d-x86_32p ", major, minor);
-        safe_strcat(info, s);
+        safe_strcat(*info, s);
     }
 
 #elif defined(CONFIG_X86_64)
 
     snprintf(s, sizeof(s), "xen-%d.%d-x86_64 ", major, minor);
-    safe_strcat(info, s);
+    safe_strcat(*info, s);
 #ifdef CONFIG_COMPAT
     snprintf(s, sizeof(s), "xen-%d.%d-x86_32p ", major, minor);
-    safe_strcat(info, s);
+    safe_strcat(*info, s);
 #endif
     if ( hvm_enabled )
     {
         snprintf(s, sizeof(s), "hvm-%d.%d-x86_32 ", major, minor);
-        safe_strcat(info, s);
+        safe_strcat(*info, s);
         snprintf(s, sizeof(s), "hvm-%d.%d-x86_32p ", major, minor);
-        safe_strcat(info, s);
+        safe_strcat(*info, s);
         snprintf(s, sizeof(s), "hvm-%d.%d-x86_64 ", major, minor);
-        safe_strcat(info, s);
+        safe_strcat(*info, s);
     }
 
 #endif

xen/common/kernel.c

@@ -162,10 +162,10 @@ DO(xen_version)(int cmd, XEN_GUEST_HANDLE(void) arg)
     case XENVER_capabilities:
     {
         xen_capabilities_info_t info;
-        extern void arch_get_xen_caps(xen_capabilities_info_t info);
+        extern void arch_get_xen_caps(xen_capabilities_info_t *info);
 
         memset(info, 0, sizeof(info));
-        arch_get_xen_caps(info);
+        arch_get_xen_caps(&info);
 
         if ( copy_to_guest(arg, (char *)info, sizeof(info)) )
             return -EFAULT;