vm_version_aarch64.cpp revision 11658:8a5735c11a84
1154899Srik/* 2154899Srik * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. 3154899Srik * Copyright (c) 2015, Red Hat Inc. All rights reserved. 4154899Srik * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5154899Srik * 6154899Srik * This code is free software; you can redistribute it and/or modify it 7154899Srik * under the terms of the GNU General Public License version 2 only, as 8154899Srik * published by the Free Software Foundation. 9154899Srik * 10154899Srik * This code is distributed in the hope that it will be useful, but WITHOUT 11154899Srik * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12154899Srik * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13154899Srik * version 2 for more details (a copy is included in the LICENSE file that 14154899Srik * accompanied this code). 15154899Srik * 16154899Srik * You should have received a copy of the GNU General Public License version 17154899Srik * 2 along with this work; if not, write to the Free Software Foundation, 18154899Srik * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19154899Srik * 20154899Srik * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21154899Srik * or visit www.oracle.com if you need additional information or have any 22154899Srik * questions. 23154899Srik * 24154899Srik */ 25154899Srik 26154899Srik#include "precompiled.hpp" 27154899Srik#include "asm/macroAssembler.hpp" 28154899Srik#include "asm/macroAssembler.inline.hpp" 29154899Srik#include "memory/resourceArea.hpp" 30154899Srik#include "runtime/java.hpp" 31154899Srik#include "runtime/stubCodeGenerator.hpp" 32154899Srik#include "utilities/macros.hpp" 33154899Srik#include "vm_version_aarch64.hpp" 34154899Srik 35154899Srik#include OS_HEADER_INLINE(os) 36154899Srik 37154899Srik#ifndef BUILTIN_SIM 38154899Srik#include <sys/auxv.h> 39154899Srik#include <asm/hwcap.h> 40154899Srik#else 41154899Srik#define getauxval(hwcap) 0 42154899Srik#endif 43154899Srik 44154899Srik#ifndef HWCAP_AES 45154899Srik#define HWCAP_AES (1<<3) 46154899Srik#endif 47154899Srik 48154899Srik#ifndef HWCAP_PMULL 49154899Srik#define HWCAP_PMULL (1<<4) 50154899Srik#endif 51154899Srik 52154899Srik#ifndef HWCAP_SHA1 53154899Srik#define HWCAP_SHA1 (1<<5) 54154899Srik#endif 55154899Srik 56154899Srik#ifndef HWCAP_SHA2 57154899Srik#define HWCAP_SHA2 (1<<6) 58154899Srik#endif 59154899Srik 60154899Srik#ifndef HWCAP_CRC32 61154899Srik#define HWCAP_CRC32 (1<<7) 62154899Srik#endif 63154899Srik 64154899Srik#ifndef HWCAP_ATOMICS 65154899Srik#define HWCAP_ATOMICS (1<<8) 66154899Srik#endif 67154899Srik 68154899Srikint VM_Version::_cpu; 69154899Srikint VM_Version::_model; 70154899Srikint VM_Version::_model2; 71154899Srikint VM_Version::_variant; 72154899Srikint VM_Version::_revision; 73154899Srikint VM_Version::_stepping; 74154899SrikVM_Version::PsrInfo VM_Version::_psr_info = { 0, }; 75180132Srik 76154899Srikstatic BufferBlob* stub_blob; 77154899Srikstatic const int stub_size = 550; 78154899Srik 79154899Srikextern "C" { 80154899Srik typedef void (*getPsrInfo_stub_t)(void*); 81154899Srik} 82154899Srikstatic getPsrInfo_stub_t getPsrInfo_stub = NULL; 83154899Srik 84154899Srik 85154899Srikclass VM_Version_StubGenerator: public StubCodeGenerator { 86154899Srik public: 87154899Srik 88154899Srik VM_Version_StubGenerator(CodeBuffer *c) : StubCodeGenerator(c) {} 89154899Srik 90154899Srik address generate_getPsrInfo() { 91154899Srik StubCodeMark mark(this, "VM_Version", "getPsrInfo_stub"); 92154899Srik# define __ _masm-> 93154899Srik address start = __ pc(); 94154899Srik 95154899Srik#ifdef BUILTIN_SIM 96154899Srik __ c_stub_prolog(1, 0, MacroAssembler::ret_type_void); 97154899Srik#endif 98154899Srik 99154899Srik // void getPsrInfo(VM_Version::PsrInfo* psr_info); 100154899Srik 101154899Srik address entry = __ pc(); 102154899Srik 103154899Srik __ enter(); 104154899Srik 105154899Srik __ get_dczid_el0(rscratch1); 106154899Srik __ strw(rscratch1, Address(c_rarg0, in_bytes(VM_Version::dczid_el0_offset()))); 107154899Srik 108154899Srik __ get_ctr_el0(rscratch1); 109154899Srik __ strw(rscratch1, Address(c_rarg0, in_bytes(VM_Version::ctr_el0_offset()))); 110154899Srik 111154899Srik __ leave(); 112154899Srik __ ret(lr); 113154899Srik 114154899Srik# undef __ 115154899Srik 116154899Srik return start; 117154899Srik } 118154899Srik}; 119154899Srik 120154899Srik 121154899Srikvoid VM_Version::get_processor_features() { 122154899Srik _supports_cx8 = true; 123154899Srik _supports_atomic_getset4 = true; 124154899Srik _supports_atomic_getadd4 = true; 125154899Srik _supports_atomic_getset8 = true; 126154899Srik _supports_atomic_getadd8 = true; 127154899Srik 128154899Srik getPsrInfo_stub(&_psr_info); 129154899Srik 130154899Srik int dcache_line = VM_Version::dcache_line_size(); 131154899Srik 132154899Srik if (FLAG_IS_DEFAULT(AllocatePrefetchDistance)) 133154899Srik FLAG_SET_DEFAULT(AllocatePrefetchDistance, 3*dcache_line); 134154899Srik if (FLAG_IS_DEFAULT(AllocatePrefetchStepSize)) 135154899Srik FLAG_SET_DEFAULT(AllocatePrefetchStepSize, dcache_line); 136154899Srik if (FLAG_IS_DEFAULT(PrefetchScanIntervalInBytes)) 137154899Srik FLAG_SET_DEFAULT(PrefetchScanIntervalInBytes, 3*dcache_line); 138154899Srik if (FLAG_IS_DEFAULT(PrefetchCopyIntervalInBytes)) 139154899Srik FLAG_SET_DEFAULT(PrefetchCopyIntervalInBytes, 3*dcache_line); 140154899Srik 141154899Srik if (PrefetchCopyIntervalInBytes != -1 && 142154899Srik ((PrefetchCopyIntervalInBytes & 7) || (PrefetchCopyIntervalInBytes >= 32768))) { 143154899Srik warning("PrefetchCopyIntervalInBytes must be -1, or a multiple of 8 and < 32768"); 144154899Srik PrefetchCopyIntervalInBytes &= ~7; 145154899Srik if (PrefetchCopyIntervalInBytes >= 32768) 146154899Srik PrefetchCopyIntervalInBytes = 32760; 147154899Srik } 148154899Srik 149154899Srik unsigned long auxv = getauxval(AT_HWCAP); 150154899Srik 151154899Srik char buf[512]; 152154899Srik 153154899Srik _features = auxv; 154154899Srik 155154899Srik int cpu_lines = 0; 156154899Srik if (FILE *f = fopen("/proc/cpuinfo", "r")) { 157154899Srik char buf[128], *p; 158154899Srik while (fgets(buf, sizeof (buf), f) != NULL) { 159154899Srik if (p = strchr(buf, ':')) { 160154899Srik long v = strtol(p+1, NULL, 0); 161154899Srik if (strncmp(buf, "CPU implementer", sizeof "CPU implementer" - 1) == 0) { 162154899Srik _cpu = v; 163154899Srik cpu_lines++; 164154899Srik } else if (strncmp(buf, "CPU variant", sizeof "CPU variant" - 1) == 0) { 165154899Srik _variant = v; 166154899Srik } else if (strncmp(buf, "CPU part", sizeof "CPU part" - 1) == 0) { 167154899Srik if (_model != v) _model2 = _model; 168154899Srik _model = v; 169154899Srik } else if (strncmp(buf, "CPU revision", sizeof "CPU revision" - 1) == 0) { 170154899Srik _revision = v; 171154899Srik } 172154899Srik } 173154899Srik } 174154899Srik fclose(f); 175154899Srik } 176154899Srik 177154899Srik // Enable vendor specific features 178154899Srik if (_cpu == CPU_CAVIUM && _variant == 0) _features |= CPU_DMB_ATOMICS; 179154899Srik if (_cpu == CPU_ARM && (_model == 0xd03 || _model2 == 0xd03)) _features |= CPU_A53MAC; 180154899Srik if (_cpu == CPU_ARM && (_model == 0xd07 || _model2 == 0xd07)) _features |= CPU_STXR_PREFETCH; 181154899Srik // If an olde style /proc/cpuinfo (cpu_lines == 1) then if _model is an A57 (0xd07) 182154899Srik // we assume the worst and assume we could be on a big little system and have 183154899Srik // undisclosed A53 cores which we could be swapped to at any stage 184154899Srik if (_cpu == CPU_ARM && cpu_lines == 1 && _model == 0xd07) _features |= CPU_A53MAC; 185154899Srik 186154899Srik sprintf(buf, "0x%02x:0x%x:0x%03x:%d", _cpu, _variant, _model, _revision); 187154899Srik if (_model2) sprintf(buf+strlen(buf), "(0x%03x)", _model2); 188154899Srik if (auxv & HWCAP_ASIMD) strcat(buf, ", simd"); 189154899Srik if (auxv & HWCAP_CRC32) strcat(buf, ", crc"); 190154899Srik if (auxv & HWCAP_AES) strcat(buf, ", aes"); 191154899Srik if (auxv & HWCAP_SHA1) strcat(buf, ", sha1"); 192154899Srik if (auxv & HWCAP_SHA2) strcat(buf, ", sha256"); 193154899Srik if (auxv & HWCAP_ATOMICS) strcat(buf, ", lse"); 194154899Srik 195154899Srik _features_string = os::strdup(buf); 196154899Srik 197154899Srik if (FLAG_IS_DEFAULT(UseCRC32)) { 198154899Srik UseCRC32 = (auxv & HWCAP_CRC32) != 0; 199154899Srik } 200154899Srik if (UseCRC32 && (auxv & HWCAP_CRC32) == 0) { 201154899Srik warning("UseCRC32 specified, but not supported on this CPU"); 202154899Srik } 203 204 if (FLAG_IS_DEFAULT(UseAdler32Intrinsics)) { 205 FLAG_SET_DEFAULT(UseAdler32Intrinsics, true); 206 } 207 208 if (UseVectorizedMismatchIntrinsic) { 209 warning("UseVectorizedMismatchIntrinsic specified, but not available on this CPU."); 210 FLAG_SET_DEFAULT(UseVectorizedMismatchIntrinsic, false); 211 } 212 213 if (auxv & HWCAP_ATOMICS) { 214 if (FLAG_IS_DEFAULT(UseLSE)) 215 FLAG_SET_DEFAULT(UseLSE, true); 216 } else { 217 if (UseLSE) { 218 warning("UseLSE specified, but not supported on this CPU"); 219 } 220 } 221 222 if (auxv & HWCAP_AES) { 223 UseAES = UseAES || FLAG_IS_DEFAULT(UseAES); 224 UseAESIntrinsics = 225 UseAESIntrinsics || (UseAES && FLAG_IS_DEFAULT(UseAESIntrinsics)); 226 if (UseAESIntrinsics && !UseAES) { 227 warning("UseAESIntrinsics enabled, but UseAES not, enabling"); 228 UseAES = true; 229 } 230 } else { 231 if (UseAES) { 232 warning("UseAES specified, but not supported on this CPU"); 233 } 234 if (UseAESIntrinsics) { 235 warning("UseAESIntrinsics specified, but not supported on this CPU"); 236 } 237 } 238 239 if (UseAESCTRIntrinsics) { 240 warning("AES/CTR intrinsics are not available on this CPU"); 241 FLAG_SET_DEFAULT(UseAESCTRIntrinsics, false); 242 } 243 244 if (FLAG_IS_DEFAULT(UseCRC32Intrinsics)) { 245 UseCRC32Intrinsics = true; 246 } 247 248 if (auxv & HWCAP_CRC32) { 249 if (FLAG_IS_DEFAULT(UseCRC32CIntrinsics)) { 250 FLAG_SET_DEFAULT(UseCRC32CIntrinsics, true); 251 } 252 } else if (UseCRC32CIntrinsics) { 253 warning("CRC32C is not available on the CPU"); 254 FLAG_SET_DEFAULT(UseCRC32CIntrinsics, false); 255 } 256 257 if (auxv & (HWCAP_SHA1 | HWCAP_SHA2)) { 258 if (FLAG_IS_DEFAULT(UseSHA)) { 259 FLAG_SET_DEFAULT(UseSHA, true); 260 } 261 } else if (UseSHA) { 262 warning("SHA instructions are not available on this CPU"); 263 FLAG_SET_DEFAULT(UseSHA, false); 264 } 265 266 if (UseSHA && (auxv & HWCAP_SHA1)) { 267 if (FLAG_IS_DEFAULT(UseSHA1Intrinsics)) { 268 FLAG_SET_DEFAULT(UseSHA1Intrinsics, true); 269 } 270 } else if (UseSHA1Intrinsics) { 271 warning("Intrinsics for SHA-1 crypto hash functions not available on this CPU."); 272 FLAG_SET_DEFAULT(UseSHA1Intrinsics, false); 273 } 274 275 if (UseSHA && (auxv & HWCAP_SHA2)) { 276 if (FLAG_IS_DEFAULT(UseSHA256Intrinsics)) { 277 FLAG_SET_DEFAULT(UseSHA256Intrinsics, true); 278 } 279 } else if (UseSHA256Intrinsics) { 280 warning("Intrinsics for SHA-224 and SHA-256 crypto hash functions not available on this CPU."); 281 FLAG_SET_DEFAULT(UseSHA256Intrinsics, false); 282 } 283 284 if (UseSHA512Intrinsics) { 285 warning("Intrinsics for SHA-384 and SHA-512 crypto hash functions not available on this CPU."); 286 FLAG_SET_DEFAULT(UseSHA512Intrinsics, false); 287 } 288 289 if (!(UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics)) { 290 FLAG_SET_DEFAULT(UseSHA, false); 291 } 292 293 if (auxv & HWCAP_PMULL) { 294 if (FLAG_IS_DEFAULT(UseGHASHIntrinsics)) { 295 FLAG_SET_DEFAULT(UseGHASHIntrinsics, true); 296 } 297 } else if (UseGHASHIntrinsics) { 298 warning("GHASH intrinsics are not available on this CPU"); 299 FLAG_SET_DEFAULT(UseGHASHIntrinsics, false); 300 } 301 302 if (is_zva_enabled()) { 303 if (FLAG_IS_DEFAULT(UseBlockZeroing)) { 304 FLAG_SET_DEFAULT(UseBlockZeroing, true); 305 } 306 if (FLAG_IS_DEFAULT(BlockZeroingLowLimit)) { 307 FLAG_SET_DEFAULT(BlockZeroingLowLimit, 4 * VM_Version::zva_length()); 308 } 309 } else if (UseBlockZeroing) { 310 warning("DC ZVA is not available on this CPU"); 311 FLAG_SET_DEFAULT(UseBlockZeroing, false); 312 } 313 314 // This machine allows unaligned memory accesses 315 if (FLAG_IS_DEFAULT(UseUnalignedAccesses)) { 316 FLAG_SET_DEFAULT(UseUnalignedAccesses, true); 317 } 318 319 if (FLAG_IS_DEFAULT(UseMultiplyToLenIntrinsic)) { 320 UseMultiplyToLenIntrinsic = true; 321 } 322 323 if (FLAG_IS_DEFAULT(UseBarriersForVolatile)) { 324 UseBarriersForVolatile = (_features & CPU_DMB_ATOMICS) != 0; 325 } 326 327 if (FLAG_IS_DEFAULT(UsePopCountInstruction)) { 328 UsePopCountInstruction = true; 329 } 330 331 if (FLAG_IS_DEFAULT(UseMontgomeryMultiplyIntrinsic)) { 332 UseMontgomeryMultiplyIntrinsic = true; 333 } 334 if (FLAG_IS_DEFAULT(UseMontgomerySquareIntrinsic)) { 335 UseMontgomerySquareIntrinsic = true; 336 } 337 338#ifdef COMPILER2 339 if (FLAG_IS_DEFAULT(OptoScheduling)) { 340 OptoScheduling = true; 341 } 342#endif 343} 344 345void VM_Version::initialize() { 346 ResourceMark rm; 347 348 stub_blob = BufferBlob::create("getPsrInfo_stub", stub_size); 349 if (stub_blob == NULL) { 350 vm_exit_during_initialization("Unable to allocate getPsrInfo_stub"); 351 } 352 353 CodeBuffer c(stub_blob); 354 VM_Version_StubGenerator g(&c); 355 getPsrInfo_stub = CAST_TO_FN_PTR(getPsrInfo_stub_t, 356 g.generate_getPsrInfo()); 357 358 get_processor_features(); 359} 360