[PATCH v2 2/8] x86/HVM: avoid effectively open-coding xmalloc_array()

[Jan Beulich <jbeulich@xxxxxxxx>]

There is a difference in generated code: xmalloc_bytes() forces
SMP_CACHE_BYTES alignment. But if code really cared about such higher
than default alignment, it should request so explicitly rather than
using a type-unsafe interface. And if e.g. cache line sharing was a
concern, the allocator itself should arrange to avoid such.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

--- a/xen/arch/x86/hvm/emulate.c
+++ b/xen/arch/x86/hvm/emulate.c
@@ -1924,7 +1924,7 @@ static int hvmemul_rep_movs(
         dgpa -= bytes - bytes_per_rep;
 
     /* Allocate temporary buffer. Fall back to slow emulation if this fails. */
-    buf = xmalloc_bytes(bytes);
+    buf = xmalloc_array(char, bytes);
     if ( buf == NULL )
         return X86EMUL_UNHANDLEABLE;
 
@@ -2037,7 +2037,7 @@ static int hvmemul_rep_stos(
         for ( ; ; )
         {
             bytes = *reps * bytes_per_rep;
-            buf = xmalloc_bytes(bytes);
+            buf = xmalloc_array(char, bytes);
             if ( buf || *reps <= 1 )
                 break;
             *reps >>= 1;