src/hotspot/cpu/aarch64/stubGenerator_aarch64.cpp

*** 2363,2372 ****
--- 2363,2410 ----
      __ leave();
      __ ret(lr);
      return start;
    }
  
+   address generate_data_cache_writeback() {
+     const Register line        = c_rarg0;  // address of line to write back
+ 
+     __ align(CodeEntryAlignment);
+ 
+     StubCodeMark mark(this, "StubRoutines", "_data_cache_writeback");
+ 
+     address start = __ pc();
+     __ enter();
+     __ cache_wb(Address(line, 0));
+     __ leave();
+     __ ret(lr);
+ 
+     return start;
+   }
+ 
+   address generate_data_cache_writeback_sync() {
+     const Register is_pre     = c_rarg0;  // pre or post sync
+ 
+     __ align(CodeEntryAlignment);
+ 
+     StubCodeMark mark(this, "StubRoutines", "_data_cache_writeback_sync");
+ 
+     // pre wbsync is a no-op
+     // post wbsync translates to an sfence
+ 
+     Label skip;
+     address start = __ pc();
+     __ enter();
+     __ cbnz(is_pre, skip);
+     __ cache_wbsync(false);
+     __ bind(skip);
+     __ leave();
+     __ ret(lr);
+ 
+     return start;
+   }
+ 
    void generate_arraycopy_stubs() {
      address entry;
      address entry_jbyte_arraycopy;
      address entry_jshort_arraycopy;
      address entry_jint_arraycopy;
*** 5822,5831 ****
--- 5860,5873 ----
      // generate GHASH intrinsics code
      if (UseGHASHIntrinsics) {
        StubRoutines::_ghash_processBlocks = generate_ghash_processBlocks();
      }
  
+     // data cache line writeback
+     StubRoutines::_data_cache_writeback = generate_data_cache_writeback();
+     StubRoutines::_data_cache_writeback_sync = generate_data_cache_writeback_sync();
+     
      if (UseAESIntrinsics) {
        StubRoutines::_aescrypt_encryptBlock = generate_aescrypt_encryptBlock();
        StubRoutines::_aescrypt_decryptBlock = generate_aescrypt_decryptBlock();
        StubRoutines::_cipherBlockChaining_encryptAESCrypt = generate_cipherBlockChaining_encryptAESCrypt();
        StubRoutines::_cipherBlockChaining_decryptAESCrypt = generate_cipherBlockChaining_decryptAESCrypt();