AAL: add AalName and smallest_page_size

src/aal/aal.h

@@ -44,6 +44,13 @@ namespace snmalloc
     StrictProvenance = (1 << 2),
   };
 
+  enum AalName : int
+  {
+    ARM,
+    X86,
+    X86_SGX,
+  };
+
   /**
    * Architecture Abstraction Layer. Includes default implementations of some
    * functions using compiler builtins.  Falls back to the definitions in the

src/aal/aal_arm.h

@@ -27,6 +27,10 @@ namespace snmalloc
     static constexpr uint64_t aal_features =
       IntegerPointers | NoCpuCycleCounters;
 
+    static constexpr enum AalName aal_name = ARM;
+
+    static constexpr size_t smallest_page_size = 0x1000;
+
     /**
      * On pipelined processors, notify the core that we are in a spin loop and
      * that speculative execution past this point may not be a performance gain.

src/aal/aal_x86.h

@@ -60,6 +60,10 @@ namespace snmalloc
      */
     static constexpr uint64_t aal_features = IntegerPointers;
 
+    static constexpr enum AalName aal_name = X86;
+
+    static constexpr size_t smallest_page_size = 0x1000;
+
     /**
      * On pipelined processors, notify the core that we are in a spin loop and
      * that speculative execution past this point may not be a performance gain.

src/aal/aal_x86_sgx.h

@@ -26,6 +26,10 @@ namespace snmalloc
      */
     static constexpr uint64_t aal_features = IntegerPointers;
 
+    static constexpr enum AalName aal_name = X86_SGX;
+
+    static constexpr size_t smallest_page_size = 0x1000;
+
     /**
      * On pipelined processors, notify the core that we are in a spin loop and
      * that speculative execution past this point may not be a performance gain.