xen/arm: grant-table: Correct the prototype of the arch helpers

Both the stub and the x86 prototypes for replace_grant_host_mapping()
and create_grant_host_mapping() will define the first parameter (and
third for the former) as uint64_t. Yet Arm will define it as
'unsigned long'.

While there are no differences for 64-bit, for 32-bit it means
that the address should be truncated as 32-bit guest could support
up to 40-bit addresses.

So replace 'unsigned long' with 'uint64_t' for the first parameter
(and third parameter for replace_grant_host_mapping()).

Signed-off-by: Julien Grall <jgrall@amazon.com>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>
Reviewed-by: Henry Wang <Henry.Wang@arm.com>
Tested-by: Henry Wang <Henry.Wang@arm.com>
Reviewed-by: Bertrand Marquis <bertrand.marquis@arm.com>

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

@@ -36,10 +36,10 @@ static inline bool gnttab_release_host_mappings(const struct domain *d)
     return true;
 }
 
-int create_grant_host_mapping(unsigned long gpaddr, mfn_t frame,
+int create_grant_host_mapping(uint64_t gpaddr, mfn_t frame,
                               unsigned int flags, unsigned int cache_flags);
-int replace_grant_host_mapping(unsigned long gpaddr, mfn_t frame,
-                               unsigned long new_gpaddr, unsigned int flags);
+int replace_grant_host_mapping(uint64_t gpaddr, mfn_t frame,
+                               uint64_t new_gpaddr, unsigned int flags);
 
 /*
  * The region used by Xen on the memory will never be mapped in DOM0

xen/arch/arm/mm.c

@@ -1579,7 +1579,7 @@ void put_page_type(struct page_info *page)
     return;
 }
 
-int create_grant_host_mapping(unsigned long gpaddr, mfn_t frame,
+int create_grant_host_mapping(uint64_t gpaddr, mfn_t frame,
                               unsigned int flags, unsigned int cache_flags)
 {
     int rc;
@@ -1600,8 +1600,8 @@ int create_grant_host_mapping(unsigned long gpaddr, mfn_t frame,
         return GNTST_okay;
 }
 
-int replace_grant_host_mapping(unsigned long gpaddr, mfn_t frame,
-                               unsigned long new_gpaddr, unsigned int flags)
+int replace_grant_host_mapping(uint64_t gpaddr, mfn_t frame,
+                               uint64_t new_gpaddr, unsigned int flags)
 {
     gfn_t gfn = gaddr_to_gfn(gpaddr);
     struct domain *d = current->domain;