xen: fix 64-bit hypercall variants

64-bit guests can pass 64-bit quantities in a single argument,
so fix up the hypercalls.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 31 insertions, 29 deletions

diff --git a/include/asm-x86/xen/hypercall.h b/include/asm-x86/xen/hypercall.h
index 2a4f9b41d684..0551b9d82ec4 100644
--- a/include/asm-x86/xen/hypercall.h
+++ b/include/asm-x86/xen/hypercall.h
@@ -223,12 +223,12 @@ static inline int
 HYPERVISOR_update_va_mapping(unsigned long va, pte_t new_val,
                              unsigned long flags)
 {
-        unsigned long pte_hi = 0;
-#ifdef CONFIG_X86_PAE
-        pte_hi = new_val.pte_high;
-#endif
-        return _hypercall4(int, update_va_mapping, va,
-                           new_val.pte_low, pte_hi, flags);
+        if (sizeof(new_val) == sizeof(long))
+                return _hypercall3(int, update_va_mapping, va,
+                                   new_val.pte, flags);
+        else
+                return _hypercall4(int, update_va_mapping, va,
+                                   new_val.pte, new_val.pte >> 32, flags);
 }
 
 static inline int
@@ -281,12 +281,13 @@ static inline int
 HYPERVISOR_update_va_mapping_otherdomain(unsigned long va, pte_t new_val,
                                          unsigned long flags, domid_t domid)
 {
-        unsigned long pte_hi = 0;
-#ifdef CONFIG_X86_PAE
-        pte_hi = new_val.pte_high;
-#endif
-        return _hypercall5(int, update_va_mapping_otherdomain, va,
-                           new_val.pte_low, pte_hi, flags, domid);
+        if (sizeof(new_val) == sizeof(long))
+                return _hypercall4(int, update_va_mapping_otherdomain, va,
+                                   new_val.pte, flags, domid);
+        else
+                return _hypercall5(int, update_va_mapping_otherdomain, va,
+                                   new_val.pte, new_val.pte >> 32,
+                                   flags, domid);
 }
 
 static inline int
@@ -327,14 +328,14 @@ MULTI_update_va_mapping(struct multicall_entry *mcl, unsigned long va,
 {
         mcl->op = __HYPERVISOR_update_va_mapping;
         mcl->args[0] = va;
-#ifdef CONFIG_X86_PAE
-        mcl->args[1] = new_val.pte_low;
-        mcl->args[2] = new_val.pte_high;
-#else
-        mcl->args[1] = new_val.pte_low;
-        mcl->args[2] = 0;
-#endif
-        mcl->args[3] = flags;
+        if (sizeof(new_val) == sizeof(long)) {
+                mcl->args[1] = new_val.pte;
+                mcl->args[2] = flags;
+        } else {
+                mcl->args[1] = new_val.pte;
+                mcl->args[2] = new_val.pte >> 32;
+                mcl->args[3] = flags;
+        }
 }
 
 static inline void
@@ -354,15 +355,16 @@ MULTI_update_va_mapping_otherdomain(struct multicall_entry *mcl, unsigned long v
 {
         mcl->op = __HYPERVISOR_update_va_mapping_otherdomain;
         mcl->args[0] = va;
-#ifdef CONFIG_X86_PAE
-        mcl->args[1] = new_val.pte_low;
-        mcl->args[2] = new_val.pte_high;
-#else
-        mcl->args[1] = new_val.pte_low;
-        mcl->args[2] = 0;
-#endif
-        mcl->args[3] = flags;
-        mcl->args[4] = domid;
+        if (sizeof(new_val) == sizeof(long)) {
+                mcl->args[1] = new_val.pte;
+                mcl->args[2] = flags;
+                mcl->args[3] = domid;
+        } else {
+                mcl->args[1] = new_val.pte;
+                mcl->args[2] = new_val.pte >> 32;
+                mcl->args[3] = flags;
+                mcl->args[4] = domid;
+        }
 }
 
 static inline void