arm_cpu.cc revision 9658
1/* 2 * Copyright (c) 2012 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions are 16 * met: redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer; 18 * redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution; 21 * neither the name of the copyright holders nor the names of its 22 * contributors may be used to endorse or promote products derived from 23 * this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 * Authors: Andreas Sandberg 38 */ 39 40#include <linux/kvm.h> 41 42#include <algorithm> 43#include <cerrno> 44#include <memory> 45 46#include "arch/registers.hh" 47#include "cpu/kvm/arm_cpu.hh" 48#include "cpu/kvm/base.hh" 49#include "debug/Kvm.hh" 50#include "debug/KvmContext.hh" 51#include "debug/KvmInt.hh" 52 53using namespace ArmISA; 54 55#define EXTRACT_FIELD(val, mask, shift) \ 56 (((val) & (mask)) >> (shift)) 57 58#define REG_IS_ARM(id) \ 59 (((id) & KVM_REG_ARCH_MASK) == KVM_REG_ARM) 60 61#define REG_IS_32BIT(id) \ 62 (((id) & KVM_REG_SIZE_MASK) == KVM_REG_SIZE_U32) 63 64#define REG_IS_64BIT(id) \ 65 (((id) & KVM_REG_SIZE_MASK) == KVM_REG_SIZE_U64) 66 67#define REG_IS_CP(id, cp) \ 68 (((id) & KVM_REG_ARM_COPROC_MASK) == (cp)) 69 70#define REG_IS_CORE(id) REG_IS_CP((id), KVM_REG_ARM_CORE) 71 72#define REG_IS_VFP(id) REG_IS_CP((id), KVM_REG_ARM_VFP) 73#define REG_VFP_REG(id) ((id) & KVM_REG_ARM_VFP_MASK) 74// HACK: These aren't really defined in any of the headers, so we'll 75// assume some reasonable values for now. 76#define REG_IS_VFP_REG(id) (REG_VFP_REG(id) < 0x100) 77#define REG_IS_VFP_CTRL(id) (REG_VFP_REG(id) >= 0x100) 78 79#define REG_IS_DEMUX(id) REG_IS_CP((id), KVM_REG_ARM_DEMUX) 80 81 82// There is no constant in the kernel headers defining the mask to use 83// to get the core register index. We'll just do what they do 84// internally. 85#define REG_CORE_IDX(id) \ 86 (~(KVM_REG_ARCH_MASK | KVM_REG_SIZE_MASK | KVM_REG_ARM_CORE)) 87 88#define REG_CP(id) \ 89 EXTRACT_FIELD(id, KVM_REG_ARM_COPROC_MASK, KVM_REG_ARM_COPROC_SHIFT) 90 91#define REG_CRN(id) \ 92 EXTRACT_FIELD(id, KVM_REG_ARM_32_CRN_MASK, KVM_REG_ARM_32_CRN_SHIFT) 93 94#define REG_OPC1(id) \ 95 EXTRACT_FIELD(id, KVM_REG_ARM_OPC1_MASK, KVM_REG_ARM_OPC1_SHIFT) 96 97#define REG_CRM(id) \ 98 EXTRACT_FIELD(id, KVM_REG_ARM_CRM_MASK, KVM_REG_ARM_CRM_SHIFT) 99 100#define REG_OPC2(id) \ 101 EXTRACT_FIELD(id, KVM_REG_ARM_32_OPC2_MASK, KVM_REG_ARM_32_OPC2_SHIFT) 102 103#define REG_CP32(cpnum, crn, opc1, crm, opc2) ( \ 104 (KVM_REG_ARM | KVM_REG_SIZE_U32) | \ 105 ((cpnum) << KVM_REG_ARM_COPROC_SHIFT) | \ 106 ((crn) << KVM_REG_ARM_32_CRN_SHIFT) | \ 107 ((opc1) << KVM_REG_ARM_OPC1_SHIFT) | \ 108 ((crm) << KVM_REG_ARM_CRM_SHIFT) | \ 109 ((opc2) << KVM_REG_ARM_32_OPC2_SHIFT)) 110 111#define REG_CP64(cpnum, opc1, crm) ( \ 112 (KVM_REG_ARM | KVM_REG_SIZE_U64) | \ 113 ((cpnum) << KVM_REG_ARM_COPROC_SHIFT) | \ 114 ((opc1) << KVM_REG_ARM_OPC1_SHIFT) | \ 115 ((crm) << KVM_REG_ARM_CRM_SHIFT)) 116 117#define REG_CORE32(kname) ( \ 118 (KVM_REG_ARM | KVM_REG_SIZE_U32) | \ 119 (KVM_REG_ARM_CORE) | \ 120 (KVM_REG_ARM_CORE_REG(kname))) 121 122#define REG_VFP32(regno) ( \ 123 (KVM_REG_ARM | KVM_REG_SIZE_U32) | \ 124 KVM_REG_ARM_VFP | (regno)) 125 126#define REG_VFP64(regno) ( \ 127 (KVM_REG_ARM | KVM_REG_SIZE_U64) | \ 128 KVM_REG_ARM_VFP | (regno)) 129 130#define REG_DEMUX32(dmxid, val) ( \ 131 (KVM_REG_ARM | KVM_REG_SIZE_U32) | \ 132 (dmxid) | (val)) 133 134// Some of the co-processor registers are invariants and must have the 135// same value on both the host and the guest. We need to keep a list 136// of these to prevent gem5 from fiddling with them on the guest. 137static uint64_t invariant_reg_vector[] = { 138 REG_CP32(15, 0, 0, 0, 0), // MIDR 139 REG_CP32(15, 0, 0, 0, 1), // CTR 140 REG_CP32(15, 0, 0, 0, 2), // TCMTR 141 REG_CP32(15, 0, 0, 0, 3), // TLBTR 142 REG_CP32(15, 0, 0, 0, 6), // REVIDR 143 144 REG_CP32(15, 0, 0, 1, 0), // ID_PFR0 145 REG_CP32(15, 0, 0, 1, 1), // ID_PFR1 146 REG_CP32(15, 0, 0, 1, 2), // ID_DFR0 147 REG_CP32(15, 0, 0, 1, 3), // ID_AFR0 148 REG_CP32(15, 0, 0, 1, 4), // ID_MMFR0 149 REG_CP32(15, 0, 0, 1, 5), // ID_MMFR1 150 REG_CP32(15, 0, 0, 1, 6), // ID_MMFR2 151 REG_CP32(15, 0, 0, 1, 7), // ID_MMFR3 152 153 REG_CP32(15, 0, 0, 2, 0), // ID_ISAR0 154 REG_CP32(15, 0, 0, 2, 1), // ID_ISAR1 155 REG_CP32(15, 0, 0, 2, 2), // ID_ISAR2 156 REG_CP32(15, 0, 0, 2, 3), // ID_ISAR3 157 REG_CP32(15, 0, 0, 2, 4), // ID_ISAR4 158 REG_CP32(15, 0, 0, 2, 5), // ID_ISAR5 159 160 REG_CP32(15, 0, 1, 0, 0), // CSSIDR 161 REG_CP32(15, 0, 1, 0, 1), // CLIDR 162 REG_CP32(15, 0, 1, 0, 7), // AIDR 163 164 REG_VFP32(KVM_REG_ARM_VFP_MVFR0), 165 REG_VFP32(KVM_REG_ARM_VFP_MVFR1), 166 REG_VFP32(KVM_REG_ARM_VFP_FPSID), 167 168 REG_DEMUX32(KVM_REG_ARM_DEMUX_ID_CCSIDR, 0), 169}; 170 171const static uint64_t KVM_REG64_TTBR0(REG_CP64(15, 0, 2)); 172const static uint64_t KVM_REG64_TTBR1(REG_CP64(15, 1, 2)); 173 174#define INTERRUPT_ID(type, vcpu, irq) ( \ 175 ((type) << KVM_ARM_IRQ_TYPE_SHIFT) | \ 176 ((vcpu) << KVM_ARM_IRQ_VCPU_SHIFT) | \ 177 ((irq) << KVM_ARM_IRQ_NUM_SHIFT)) 178 179#define INTERRUPT_VCPU_IRQ(vcpu) \ 180 INTERRUPT_ID(KVM_ARM_IRQ_TYPE_CPU, vcpu, KVM_ARM_IRQ_CPU_IRQ) 181 182#define INTERRUPT_VCPU_FIQ(vcpu) \ 183 INTERRUPT_ID(KVM_ARM_IRQ_TYPE_CPU, vcpu, KVM_ARM_IRQ_CPU_FIQ) 184 185 186#define COUNT_OF(l) (sizeof(l) / sizeof(*l)) 187 188const std::set<uint64_t> ArmKvmCPU::invariant_regs( 189 invariant_reg_vector, 190 invariant_reg_vector + COUNT_OF(invariant_reg_vector)); 191 192 193ArmKvmCPU::KvmIntRegInfo ArmKvmCPU::kvmIntRegs[] = { 194 { REG_CORE32(usr_regs.ARM_r0), INTREG_R0, "R0" }, 195 { REG_CORE32(usr_regs.ARM_r1), INTREG_R1, "R1" }, 196 { REG_CORE32(usr_regs.ARM_r2), INTREG_R2, "R2" }, 197 { REG_CORE32(usr_regs.ARM_r3), INTREG_R3, "R3" }, 198 { REG_CORE32(usr_regs.ARM_r4), INTREG_R4, "R4" }, 199 { REG_CORE32(usr_regs.ARM_r5), INTREG_R5, "R5" }, 200 { REG_CORE32(usr_regs.ARM_r6), INTREG_R6, "R6" }, 201 { REG_CORE32(usr_regs.ARM_r7), INTREG_R7, "R7" }, 202 { REG_CORE32(usr_regs.ARM_r8), INTREG_R8, "R8" }, 203 { REG_CORE32(usr_regs.ARM_r9), INTREG_R9, "R9" }, 204 { REG_CORE32(usr_regs.ARM_r10), INTREG_R10, "R10" }, 205 { REG_CORE32(usr_regs.ARM_fp), INTREG_R11, "R11" }, 206 { REG_CORE32(usr_regs.ARM_ip), INTREG_R12, "R12" }, 207 { REG_CORE32(usr_regs.ARM_sp), INTREG_R13, "R13(USR)" }, 208 { REG_CORE32(usr_regs.ARM_lr), INTREG_R14, "R14(USR)" }, 209 210 { REG_CORE32(svc_regs[0]), INTREG_SP_SVC, "R13(SVC)" }, 211 { REG_CORE32(svc_regs[1]), INTREG_LR_SVC, "R14(SVC)" }, 212 213 { REG_CORE32(abt_regs[0]), INTREG_SP_ABT, "R13(ABT)" }, 214 { REG_CORE32(abt_regs[1]), INTREG_LR_ABT, "R14(ABT)" }, 215 216 { REG_CORE32(und_regs[0]), INTREG_SP_UND, "R13(UND)" }, 217 { REG_CORE32(und_regs[1]), INTREG_LR_UND, "R14(UND)" }, 218 219 { REG_CORE32(irq_regs[0]), INTREG_SP_IRQ, "R13(IRQ)" }, 220 { REG_CORE32(irq_regs[1]), INTREG_LR_IRQ, "R14(IRQ)" }, 221 222 223 { REG_CORE32(fiq_regs[0]), INTREG_R8_FIQ, "R8(FIQ)" }, 224 { REG_CORE32(fiq_regs[1]), INTREG_R9_FIQ, "R9(FIQ)" }, 225 { REG_CORE32(fiq_regs[2]), INTREG_R10_FIQ, "R10(FIQ)" }, 226 { REG_CORE32(fiq_regs[3]), INTREG_R11_FIQ, "R11(FIQ)" }, 227 { REG_CORE32(fiq_regs[4]), INTREG_R12_FIQ, "R12(FIQ)" }, 228 { REG_CORE32(fiq_regs[5]), INTREG_R13_FIQ, "R13(FIQ)" }, 229 { REG_CORE32(fiq_regs[6]), INTREG_R14_FIQ, "R14(FIQ)" }, 230 { 0, NUM_INTREGS, NULL } 231}; 232 233ArmKvmCPU::KvmCoreMiscRegInfo ArmKvmCPU::kvmCoreMiscRegs[] = { 234 { REG_CORE32(usr_regs.ARM_cpsr), MISCREG_CPSR, "CPSR" }, 235 { REG_CORE32(svc_regs[2]), MISCREG_SPSR_SVC, "SPSR(SVC)" }, 236 { REG_CORE32(abt_regs[2]), MISCREG_SPSR_ABT, "SPSR(ABT)" }, 237 { REG_CORE32(und_regs[2]), MISCREG_SPSR_UND, "SPSR(UND)" }, 238 { REG_CORE32(irq_regs[2]), MISCREG_SPSR_IRQ, "SPSR(IRQ)" }, 239 { REG_CORE32(fiq_regs[2]), MISCREG_SPSR_FIQ, "SPSR(FIQ)" }, 240 { 0, NUM_MISCREGS } 241}; 242 243ArmKvmCPU::ArmKvmCPU(ArmKvmCPUParams *params) 244 : BaseKvmCPU(params), 245 irqAsserted(false), fiqAsserted(false) 246{ 247} 248 249ArmKvmCPU::~ArmKvmCPU() 250{ 251} 252 253void 254ArmKvmCPU::startup() 255{ 256 BaseKvmCPU::startup(); 257 258 /* TODO: This needs to be moved when we start to support VMs with 259 * multiple threads since kvmArmVCpuInit requires that all CPUs in 260 * the VM have been created. 261 */ 262 /* TODO: The CPU type needs to be configurable once KVM on ARM 263 * starts to support more CPUs. 264 */ 265 kvmArmVCpuInit(KVM_ARM_TARGET_CORTEX_A15); 266} 267 268void 269ArmKvmCPU::tick() 270{ 271 bool simFIQ(interrupts->checkRaw(INT_FIQ)); 272 bool simIRQ(interrupts->checkRaw(INT_IRQ)); 273 274 if (fiqAsserted != simFIQ) { 275 fiqAsserted = simFIQ; 276 DPRINTF(KvmInt, "KVM: Update FIQ state: %i\n", simFIQ); 277 vm.setIRQLine(INTERRUPT_VCPU_FIQ(vcpuID), simFIQ); 278 } 279 if (irqAsserted != simIRQ) { 280 irqAsserted = simIRQ; 281 DPRINTF(KvmInt, "KVM: Update IRQ state: %i\n", simIRQ); 282 vm.setIRQLine(INTERRUPT_VCPU_IRQ(vcpuID), simIRQ); 283 } 284 285 BaseKvmCPU::tick(); 286} 287 288void 289ArmKvmCPU::dump() 290{ 291 dumpKvmStateCore(); 292 dumpKvmStateMisc(); 293} 294 295void 296ArmKvmCPU::updateKvmState() 297{ 298 DPRINTF(KvmContext, "Updating KVM state...\n"); 299 300 updateKvmStateCore(); 301 updateKvmStateMisc(); 302} 303 304void 305ArmKvmCPU::updateThreadContext() 306{ 307 DPRINTF(KvmContext, "Updating gem5 state...\n"); 308 309 updateTCStateCore(); 310 updateTCStateMisc(); 311} 312 313const ArmKvmCPU::RegIndexVector & 314ArmKvmCPU::getRegList() const 315{ 316 if (_regIndexList.size() == 0) { 317 std::unique_ptr<struct kvm_reg_list> regs; 318 uint64_t i(1); 319 320 do { 321 i <<= 1; 322 regs.reset((struct kvm_reg_list *) 323 operator new(sizeof(struct kvm_reg_list) + 324 i * sizeof(uint64_t))); 325 regs->n = i; 326 } while (!getRegList(*regs)); 327 _regIndexList.assign(regs->reg, 328 regs->reg + regs->n); 329 } 330 331 return _regIndexList; 332} 333 334void 335ArmKvmCPU::kvmArmVCpuInit(uint32_t target) 336{ 337 struct kvm_vcpu_init init; 338 339 memset(&init, 0, sizeof(init)); 340 341 init.target = target; 342 343 kvmArmVCpuInit(init); 344} 345 346void 347ArmKvmCPU::kvmArmVCpuInit(const struct kvm_vcpu_init &init) 348{ 349 if (ioctl(KVM_ARM_VCPU_INIT, (void *)&init) == -1) 350 panic("KVM: Failed to initialize vCPU\n"); 351} 352 353MiscRegIndex 354ArmKvmCPU::decodeCoProcReg(uint64_t id) const 355{ 356 const unsigned cp(REG_CP(id)); 357 const bool is_reg32(REG_IS_32BIT(id)); 358 const bool is_reg64(REG_IS_64BIT(id)); 359 360 // CP numbers larger than 15 are reserved for KVM extensions 361 if (cp > 15) 362 return NUM_MISCREGS; 363 364 const unsigned crm(REG_CRM(id)); 365 const unsigned crn(REG_CRN(id)); 366 const unsigned opc1(REG_OPC1(id)); 367 const unsigned opc2(REG_OPC2(id)); 368 369 if (is_reg32) { 370 switch (cp) { 371 case 14: 372 return decodeCP14Reg(crn, opc1, crm, opc2); 373 374 case 15: 375 return decodeCP15Reg(crn, opc1, crm, opc2); 376 377 default: 378 return NUM_MISCREGS; 379 } 380 } else if(is_reg64) { 381 return NUM_MISCREGS; 382 } else { 383 warn("Unhandled register length, register (0x%x) ignored.\n"); 384 return NUM_MISCREGS; 385 } 386} 387 388ArmISA::MiscRegIndex 389ArmKvmCPU::decodeVFPCtrlReg(uint64_t id) const 390{ 391 if (!REG_IS_ARM(id) || !REG_IS_VFP(id) || !REG_IS_VFP_CTRL(id)) 392 return NUM_MISCREGS; 393 394 const unsigned vfp_reg(REG_VFP_REG(id)); 395 switch (vfp_reg) { 396 case KVM_REG_ARM_VFP_FPSID: return MISCREG_FPSID; 397 case KVM_REG_ARM_VFP_FPSCR: return MISCREG_FPSCR; 398 case KVM_REG_ARM_VFP_MVFR0: return MISCREG_MVFR0; 399 case KVM_REG_ARM_VFP_MVFR1: return MISCREG_MVFR1; 400 case KVM_REG_ARM_VFP_FPEXC: return MISCREG_FPEXC; 401 402 case KVM_REG_ARM_VFP_FPINST: 403 case KVM_REG_ARM_VFP_FPINST2: 404 warn_once("KVM: FPINST not implemented.\n"); 405 return NUM_MISCREGS; 406 407 default: 408 return NUM_MISCREGS; 409 } 410} 411 412bool 413ArmKvmCPU::isInvariantReg(uint64_t id) 414{ 415 /* Mask away the value field from multiplexed registers, we assume 416 * that entire groups of multiplexed registers can be treated as 417 * invariant. */ 418 if (REG_IS_ARM(id) && REG_IS_DEMUX(id)) 419 id &= ~KVM_REG_ARM_DEMUX_VAL_MASK; 420 421 return invariant_regs.find(id) != invariant_regs.end(); 422} 423 424bool 425ArmKvmCPU::getRegList(struct kvm_reg_list ®s) const 426{ 427 if (ioctl(KVM_GET_REG_LIST, (void *)®s) == -1) { 428 if (errno == E2BIG) { 429 return false; 430 } else { 431 panic("KVM: Failed to get vCPU register list (errno: %i)\n", 432 errno); 433 } 434 } else { 435 return true; 436 } 437} 438 439void 440ArmKvmCPU::dumpKvmStateCore() 441{ 442 /* Print core registers */ 443 uint32_t pc(getOneRegU32(REG_CORE32(usr_regs.ARM_pc))); 444 inform("PC: 0x%x\n", pc); 445 446 for (const KvmIntRegInfo *ri(kvmIntRegs); 447 ri->idx != NUM_INTREGS; ++ri) { 448 449 uint32_t value(getOneRegU32(ri->id)); 450 inform("%s: 0x%x\n", ri->name, value); 451 } 452 453 for (const KvmCoreMiscRegInfo *ri(kvmCoreMiscRegs); 454 ri->idx != NUM_MISCREGS; ++ri) { 455 456 uint32_t value(getOneRegU32(ri->id)); 457 inform("%s: 0x%x\n", miscRegName[ri->idx], value); 458 } 459} 460 461void 462ArmKvmCPU::dumpKvmStateMisc() 463{ 464 /* Print co-processor registers */ 465 const RegIndexVector ®_ids(getRegList());; 466 for (RegIndexVector::const_iterator it(reg_ids.begin()); 467 it != reg_ids.end(); ++it) { 468 uint64_t id(*it); 469 470 if (REG_IS_ARM(id) && REG_CP(id) <= 15) { 471 dumpKvmStateCoProc(id); 472 } else if (REG_IS_ARM(id) && REG_IS_VFP(id)) { 473 dumpKvmStateVFP(id); 474 } else if (REG_IS_ARM(id) && REG_IS_DEMUX(id)) { 475 switch (id & KVM_REG_ARM_DEMUX_ID_MASK) { 476 case KVM_REG_ARM_DEMUX_ID_CCSIDR: 477 inform("CCSIDR [0x%x]: %s\n", 478 EXTRACT_FIELD(id, 479 KVM_REG_ARM_DEMUX_VAL_MASK, 480 KVM_REG_ARM_DEMUX_VAL_SHIFT), 481 getAndFormatOneReg(id)); 482 break; 483 default: 484 inform("DEMUX [0x%x, 0x%x]: %s\n", 485 EXTRACT_FIELD(id, 486 KVM_REG_ARM_DEMUX_ID_MASK, 487 KVM_REG_ARM_DEMUX_ID_SHIFT), 488 EXTRACT_FIELD(id, 489 KVM_REG_ARM_DEMUX_VAL_MASK, 490 KVM_REG_ARM_DEMUX_VAL_SHIFT), 491 getAndFormatOneReg(id)); 492 break; 493 } 494 } else if (!REG_IS_CORE(id)) { 495 inform("0x%x: %s\n", id, getAndFormatOneReg(id)); 496 } 497 } 498} 499 500void 501ArmKvmCPU::dumpKvmStateCoProc(uint64_t id) 502{ 503 assert(REG_IS_ARM(id)); 504 assert(REG_CP(id) <= 15); 505 506 if (REG_IS_32BIT(id)) { 507 // 32-bit co-proc registers 508 MiscRegIndex idx(decodeCoProcReg(id)); 509 uint32_t value(getOneRegU32(id)); 510 511 if (idx != NUM_MISCREGS && 512 !(idx >= MISCREG_CP15_UNIMP_START && idx < MISCREG_CP15_END)) { 513 const char *name(miscRegName[idx]); 514 const unsigned m5_ne(tc->readMiscRegNoEffect(idx)); 515 const unsigned m5_e(tc->readMiscReg(idx)); 516 inform("CP%i: [CRn: c%i opc1: %.2i CRm: c%i opc2: %i inv: %i]: " 517 "[%s]: 0x%x/0x%x\n", 518 REG_CP(id), REG_CRN(id), REG_OPC1(id), REG_CRM(id), 519 REG_OPC2(id), isInvariantReg(id), 520 name, value, m5_e); 521 if (m5_e != m5_ne) { 522 inform("readMiscReg: %x, readMiscRegNoEffect: %x\n", 523 m5_e, m5_ne); 524 } 525 } else { 526 const char *name(idx != NUM_MISCREGS ? miscRegName[idx] : "-"); 527 inform("CP%i: [CRn: c%i opc1: %.2i CRm: c%i opc2: %i inv: %i]: [%s]: " 528 "0x%x\n", 529 REG_CP(id), REG_CRN(id), REG_OPC1(id), REG_CRM(id), 530 REG_OPC2(id), isInvariantReg(id), name, value); 531 } 532 } else { 533 inform("CP%i: [CRn: c%i opc1: %.2i CRm: c%i opc2: %i inv: %i " 534 "len: 0x%x]: %s\n", 535 REG_CP(id), REG_CRN(id), REG_OPC1(id), REG_CRM(id), 536 REG_OPC2(id), isInvariantReg(id), 537 EXTRACT_FIELD(id, KVM_REG_SIZE_MASK, KVM_REG_SIZE_SHIFT), 538 getAndFormatOneReg(id)); 539 } 540} 541 542void 543ArmKvmCPU::dumpKvmStateVFP(uint64_t id) 544{ 545 assert(REG_IS_ARM(id)); 546 assert(REG_IS_VFP(id)); 547 548 if (REG_IS_VFP_REG(id)) { 549 const unsigned idx(id & KVM_REG_ARM_VFP_MASK); 550 inform("VFP reg %i: %s", idx, getAndFormatOneReg(id)); 551 } else if (REG_IS_VFP_CTRL(id)) { 552 MiscRegIndex idx(decodeVFPCtrlReg(id)); 553 if (idx != NUM_MISCREGS) { 554 inform("VFP [%s]: %s", miscRegName[idx], getAndFormatOneReg(id)); 555 } else { 556 inform("VFP [0x%x]: %s", id, getAndFormatOneReg(id)); 557 } 558 } else { 559 inform("VFP [0x%x]: %s", id, getAndFormatOneReg(id)); 560 } 561} 562 563void 564ArmKvmCPU::updateKvmStateCore() 565{ 566 for (const KvmIntRegInfo *ri(kvmIntRegs); 567 ri->idx != NUM_INTREGS; ++ri) { 568 569 uint64_t value(tc->readIntRegFlat(ri->idx)); 570 DPRINTF(KvmContext, "kvm(%s) := 0x%x\n", ri->name, value); 571 setOneReg(ri->id, value); 572 } 573 574 DPRINTF(KvmContext, "kvm(PC) := 0x%x\n", tc->instAddr()); 575 setOneReg(REG_CORE32(usr_regs.ARM_pc), tc->instAddr()); 576 577 for (const KvmCoreMiscRegInfo *ri(kvmCoreMiscRegs); 578 ri->idx != NUM_MISCREGS; ++ri) { 579 580 uint64_t value(tc->readMiscReg(ri->idx)); 581 DPRINTF(KvmContext, "kvm(%s) := 0x%x\n", ri->name, value); 582 setOneReg(ri->id, value); 583 } 584 585 if (DTRACE(KvmContext)) 586 dumpKvmStateCore(); 587} 588 589void 590ArmKvmCPU::updateKvmStateMisc() 591{ 592 static bool warned(false); // We can't use warn_once since we want 593 // to show /all/ registers 594 595 const RegIndexVector ®s(getRegList()); 596 597 for (RegIndexVector::const_iterator it(regs.begin()); 598 it != regs.end(); 599 ++it) { 600 601 if (!REG_IS_ARM(*it)) { 602 if (!warned) 603 warn("Skipping non-ARM register: 0x%x\n", *it); 604 } else if (isInvariantReg(*it)) { 605 DPRINTF(Kvm, "Skipping invariant register: 0x%x\n", *it); 606 } else if (REG_IS_CORE(*it)) { 607 // Core registers are handled in updateKvmStateCore 608 continue; 609 } else if (REG_CP(*it) <= 15) { 610 updateKvmStateCoProc(*it, !warned); 611 } else if (REG_IS_VFP(*it)) { 612 updateKvmStateVFP(*it, !warned); 613 } else { 614 if (!warned) { 615 warn("Skipping register with unknown CP (%i) id: 0x%x\n", 616 REG_CP(*it), *it); 617 } 618 } 619 620 } 621 622 warned = true; 623 if (DTRACE(KvmContext)) 624 dumpKvmStateMisc(); 625} 626 627void 628ArmKvmCPU::updateKvmStateCoProc(uint64_t id, bool show_warnings) 629{ 630 MiscRegIndex reg(decodeCoProcReg(id)); 631 632 assert(REG_IS_ARM(id)); 633 assert(REG_CP(id) <= 15); 634 635 if (id == KVM_REG64_TTBR0 || id == KVM_REG64_TTBR1) { 636 // HACK HACK HACK: Workaround for 64-bit TTBRx 637 reg = (id == KVM_REG64_TTBR0 ? MISCREG_TTBR0 : MISCREG_TTBR1); 638 if (show_warnings) 639 hack("KVM: 64-bit TTBBRx workaround\n"); 640 } 641 642 if (reg == NUM_MISCREGS) { 643 if (show_warnings) { 644 warn("KVM: Ignoring unknown KVM co-processor register (0x%.8x):\n", 645 id); 646 warn("\t0x%x: [CP: %i 64: %i CRn: c%i opc1: %.2i CRm: c%i" 647 " opc2: %i]\n", 648 id, REG_CP(id), REG_IS_64BIT(id), REG_CRN(id), 649 REG_OPC1(id), REG_CRM(id), REG_OPC2(id)); 650 } 651 } else if (reg >= MISCREG_CP15_UNIMP_START && reg < MISCREG_CP15_END) { 652 if (show_warnings) 653 warn("KVM: Co-processor reg. %s not implemented by gem5.\n", 654 miscRegName[reg]); 655 } else { 656 setOneReg(id, tc->readMiscRegNoEffect(reg)); 657 } 658} 659 660 661void 662ArmKvmCPU::updateKvmStateVFP(uint64_t id, bool show_warnings) 663{ 664 assert(REG_IS_ARM(id)); 665 assert(REG_IS_VFP(id)); 666 667 if (REG_IS_VFP_REG(id)) { 668 if (!REG_IS_64BIT(id)) { 669 if (show_warnings) 670 warn("Unexpected VFP register length (reg: 0x%x).\n", id); 671 return; 672 } 673 const unsigned idx(id & KVM_REG_ARM_VFP_MASK); 674 const unsigned idx_base(idx << 1); 675 const unsigned idx_hi(idx_base + 1); 676 const unsigned idx_lo(idx_base + 0); 677 uint64_t value( 678 ((uint64_t)tc->readFloatRegBitsFlat(idx_hi) << 32) | 679 tc->readFloatRegBitsFlat(idx_lo)); 680 681 setOneReg(id, value); 682 } else if (REG_IS_VFP_CTRL(id)) { 683 MiscRegIndex idx(decodeVFPCtrlReg(id)); 684 if (idx == NUM_MISCREGS) { 685 if (show_warnings) 686 warn("Unhandled VFP control register: 0x%x\n", id); 687 return; 688 } 689 if (!REG_IS_32BIT(id)) { 690 if (show_warnings) 691 warn("Ignoring VFP control register (%s) with " 692 "unexpected size.\n", 693 miscRegName[idx]); 694 return; 695 } 696 setOneReg(id, (uint32_t)tc->readMiscReg(idx)); 697 } else { 698 if (show_warnings) 699 warn("Unhandled VFP register: 0x%x\n", id); 700 } 701} 702 703void 704ArmKvmCPU::updateTCStateCore() 705{ 706 for (const KvmIntRegInfo *ri(kvmIntRegs); 707 ri->idx != NUM_INTREGS; ++ri) { 708 709 tc->setIntRegFlat(ri->idx, getOneRegU32(ri->id)); 710 } 711 712 for (const KvmCoreMiscRegInfo *ri(kvmCoreMiscRegs); 713 ri->idx != NUM_MISCREGS; ++ri) { 714 715 tc->setMiscRegNoEffect(ri->idx, getOneRegU32(ri->id)); 716 } 717 718 /* We want the simulator to execute all side-effects of the CPSR 719 * update since this updates PC state and register maps. 720 */ 721 tc->setMiscReg(MISCREG_CPSR, tc->readMiscRegNoEffect(MISCREG_CPSR)); 722 723 // We update the PC state after we have updated the CPSR the 724 // contents of the CPSR affects how the npc is updated. 725 PCState pc(tc->pcState()); 726 pc.set(getOneRegU32(REG_CORE32(usr_regs.ARM_pc))); 727 tc->pcState(pc); 728 729 if (DTRACE(KvmContext)) 730 dumpKvmStateCore(); 731} 732 733void 734ArmKvmCPU::updateTCStateMisc() 735{ 736 static bool warned(false); // We can't use warn_once since we want 737 // to show /all/ registers 738 739 const RegIndexVector ®_ids(getRegList());; 740 for (RegIndexVector::const_iterator it(reg_ids.begin()); 741 it != reg_ids.end(); ++it) { 742 743 if (!REG_IS_ARM(*it)) { 744 if (!warned) 745 warn("Skipping non-ARM register: 0x%x\n", *it); 746 } else if (REG_IS_CORE(*it)) { 747 // Core registers are handled in updateKvmStateCore 748 } else if (REG_CP(*it) <= 15) { 749 updateTCStateCoProc(*it, !warned); 750 } else if (REG_IS_VFP(*it)) { 751 updateTCStateVFP(*it, !warned); 752 } else { 753 if (!warned) { 754 warn("Skipping register with unknown CP (%i) id: 0x%x\n", 755 REG_CP(*it), *it); 756 } 757 } 758 } 759 760 warned = true; 761 762 if (DTRACE(KvmContext)) 763 dumpKvmStateMisc(); 764} 765 766void 767ArmKvmCPU::updateTCStateCoProc(uint64_t id, bool show_warnings) 768{ 769 MiscRegIndex reg(decodeCoProcReg(id)); 770 771 assert(REG_IS_ARM(id)); 772 assert(REG_CP(id) <= 15); 773 774 if (id == KVM_REG64_TTBR0 || id == KVM_REG64_TTBR1) { 775 // HACK HACK HACK: We don't currently support 64-bit TTBR0/TTBR1 776 hack_once("KVM: 64-bit TTBRx workaround\n"); 777 tc->setMiscRegNoEffect( 778 id == KVM_REG64_TTBR0 ? MISCREG_TTBR0 : MISCREG_TTBR1, 779 (uint32_t)(getOneRegU64(id) & 0xFFFFFFFF)); 780 } else if (reg == MISCREG_TTBCR) { 781 uint32_t value(getOneRegU64(id)); 782 if (value & 0x80000000) 783 panic("KVM: Guest tried to enable LPAE.\n"); 784 tc->setMiscRegNoEffect(reg, value); 785 } else if (reg == NUM_MISCREGS) { 786 if (show_warnings) { 787 warn("KVM: Ignoring unknown KVM co-processor register:\n", id); 788 warn("\t0x%x: [CP: %i 64: %i CRn: c%i opc1: %.2i CRm: c%i" 789 " opc2: %i]\n", 790 id, REG_CP(id), REG_IS_64BIT(id), REG_CRN(id), 791 REG_OPC1(id), REG_CRM(id), REG_OPC2(id)); 792 } 793 } else if (reg >= MISCREG_CP15_UNIMP_START && reg < MISCREG_CP15_END) { 794 if (show_warnings) 795 warn_once("KVM: Co-processor reg. %s not implemented by gem5.\n", 796 miscRegName[reg]); 797 } else { 798 tc->setMiscRegNoEffect(reg, getOneRegU32(id)); 799 } 800} 801 802void 803ArmKvmCPU::updateTCStateVFP(uint64_t id, bool show_warnings) 804{ 805 assert(REG_IS_ARM(id)); 806 assert(REG_IS_VFP(id)); 807 808 if (REG_IS_VFP_REG(id)) { 809 if (!REG_IS_64BIT(id)) { 810 if (show_warnings) 811 warn("Unexpected VFP register length (reg: 0x%x).\n", id); 812 return; 813 } 814 const unsigned idx(id & KVM_REG_ARM_VFP_MASK); 815 const unsigned idx_base(idx << 1); 816 const unsigned idx_hi(idx_base + 1); 817 const unsigned idx_lo(idx_base + 0); 818 uint64_t value(getOneRegU64(id)); 819 820 tc->setFloatRegBitsFlat(idx_hi, (value >> 32) & 0xFFFFFFFF); 821 tc->setFloatRegBitsFlat(idx_lo, value & 0xFFFFFFFF); 822 } else if (REG_IS_VFP_CTRL(id)) { 823 MiscRegIndex idx(decodeVFPCtrlReg(id)); 824 if (idx == NUM_MISCREGS) { 825 if (show_warnings) 826 warn("Unhandled VFP control register: 0x%x\n", id); 827 return; 828 } 829 if (!REG_IS_32BIT(id)) { 830 if (show_warnings) 831 warn("Ignoring VFP control register (%s) with " 832 "unexpected size.\n", 833 miscRegName[idx]); 834 return; 835 } 836 tc->setMiscReg(idx, getOneRegU64(id)); 837 } else { 838 if (show_warnings) 839 warn("Unhandled VFP register: 0x%x\n", id); 840 } 841} 842 843ArmKvmCPU * 844ArmKvmCPUParams::create() 845{ 846 return new ArmKvmCPU(this); 847} 848