8321269: Require platforms to define DEFAULT_CACHE_LINE_SIZE

Reviewed-by: stefank, stuefe, dholmes

Author: shipilev

src/hotspot/cpu/aarch64/globalDefinitions_aarch64.hpp

@@ -42,6 +42,8 @@ const bool CCallingConventionRequiresIntsAsLongs = false;
 // and Operational Models for ARMv8"
 #define CPU_MULTI_COPY_ATOMIC
 
+#define DEFAULT_CACHE_LINE_SIZE 64
+
 // According to the ARMv8 ARM, "Concurrent modification and execution
 // of instructions can lead to the resulting instruction performing
 // any behavior that can be achieved by executing any sequence of

src/hotspot/cpu/arm/globalDefinitions_arm.hpp

@@ -49,6 +49,8 @@ const bool HaveVFP = true;
 // arm32 is not specified as multi-copy-atomic
 // So we must not #define CPU_MULTI_COPY_ATOMIC
 
+#define DEFAULT_CACHE_LINE_SIZE 64
+
 #define STUBROUTINES_MD_HPP    "stubRoutines_arm.hpp"
 #define INTERP_MASM_MD_HPP     "interp_masm_arm.hpp"
 #define TEMPLATETABLE_MD_HPP   "templateTable_arm.hpp"

src/hotspot/cpu/zero/globalDefinitions_zero.hpp

@@ -30,6 +30,8 @@
 #define SUPPORTS_NATIVE_CX8
 #endif
 
+#define DEFAULT_CACHE_LINE_SIZE 64
+
 #define SUPPORT_MONITOR_COUNT
 
 #include <ffi.h>

src/hotspot/share/utilities/globalDefinitions.hpp

@@ -604,7 +604,7 @@ const bool support_IRIW_for_not_multiple_copy_atomic_cpu = PPC64_ONLY(true) NOT_
 
 // The expected size in bytes of a cache line, used to pad data structures.
 #ifndef DEFAULT_CACHE_LINE_SIZE
-  #define DEFAULT_CACHE_LINE_SIZE 64
+#error "Platform should define DEFAULT_CACHE_LINE_SIZE"
 #endif