/* * PowerPC exception emulation helpers for QEMU. * * Copyright (c) 2003-2007 Jocelyn Mayer * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, see . */ #include "qemu/osdep.h" #include "qemu/main-loop.h" #include "cpu.h" #include "exec/exec-all.h" #include "internal.h" #include "helper_regs.h" #include "trace.h" #ifdef CONFIG_TCG #include "exec/helper-proto.h" #include "exec/cpu_ldst.h" #endif /*****************************************************************************/ /* Exception processing */ #if !defined(CONFIG_USER_ONLY) static const char *powerpc_excp_name(int excp) { switch (excp) { case POWERPC_EXCP_CRITICAL: return "CRITICAL"; case POWERPC_EXCP_MCHECK: return "MCHECK"; case POWERPC_EXCP_DSI: return "DSI"; case POWERPC_EXCP_ISI: return "ISI"; case POWERPC_EXCP_EXTERNAL: return "EXTERNAL"; case POWERPC_EXCP_ALIGN: return "ALIGN"; case POWERPC_EXCP_PROGRAM: return "PROGRAM"; case POWERPC_EXCP_FPU: return "FPU"; case POWERPC_EXCP_SYSCALL: return "SYSCALL"; case POWERPC_EXCP_APU: return "APU"; case POWERPC_EXCP_DECR: return "DECR"; case POWERPC_EXCP_FIT: return "FIT"; case POWERPC_EXCP_WDT: return "WDT"; case POWERPC_EXCP_DTLB: return "DTLB"; case POWERPC_EXCP_ITLB: return "ITLB"; case POWERPC_EXCP_DEBUG: return "DEBUG"; case POWERPC_EXCP_SPEU: return "SPEU"; case POWERPC_EXCP_EFPDI: return "EFPDI"; case POWERPC_EXCP_EFPRI: return "EFPRI"; case POWERPC_EXCP_EPERFM: return "EPERFM"; case POWERPC_EXCP_DOORI: return "DOORI"; case POWERPC_EXCP_DOORCI: return "DOORCI"; case POWERPC_EXCP_GDOORI: return "GDOORI"; case POWERPC_EXCP_GDOORCI: return "GDOORCI"; case POWERPC_EXCP_HYPPRIV: return "HYPPRIV"; case POWERPC_EXCP_RESET: return "RESET"; case POWERPC_EXCP_DSEG: return "DSEG"; case POWERPC_EXCP_ISEG: return "ISEG"; case POWERPC_EXCP_HDECR: return "HDECR"; case POWERPC_EXCP_TRACE: return "TRACE"; case POWERPC_EXCP_HDSI: return "HDSI"; case POWERPC_EXCP_HISI: return "HISI"; case POWERPC_EXCP_HDSEG: return "HDSEG"; case POWERPC_EXCP_HISEG: return "HISEG"; case POWERPC_EXCP_VPU: return "VPU"; case POWERPC_EXCP_PIT: return "PIT"; case POWERPC_EXCP_IO: return "IO"; case POWERPC_EXCP_RUNM: return "RUNM"; case POWERPC_EXCP_EMUL: return "EMUL"; case POWERPC_EXCP_IFTLB: return "IFTLB"; case POWERPC_EXCP_DLTLB: return "DLTLB"; case POWERPC_EXCP_DSTLB: return "DSTLB"; case POWERPC_EXCP_FPA: return "FPA"; case POWERPC_EXCP_DABR: return "DABR"; case POWERPC_EXCP_IABR: return "IABR"; case POWERPC_EXCP_SMI: return "SMI"; case POWERPC_EXCP_PERFM: return "PERFM"; case POWERPC_EXCP_THERM: return "THERM"; case POWERPC_EXCP_VPUA: return "VPUA"; case POWERPC_EXCP_SOFTP: return "SOFTP"; case POWERPC_EXCP_MAINT: return "MAINT"; case POWERPC_EXCP_MEXTBR: return "MEXTBR"; case POWERPC_EXCP_NMEXTBR: return "NMEXTBR"; case POWERPC_EXCP_ITLBE: return "ITLBE"; case POWERPC_EXCP_DTLBE: return "DTLBE"; case POWERPC_EXCP_VSXU: return "VSXU"; case POWERPC_EXCP_FU: return "FU"; case POWERPC_EXCP_HV_EMU: return "HV_EMU"; case POWERPC_EXCP_HV_MAINT: return "HV_MAINT"; case POWERPC_EXCP_HV_FU: return "HV_FU"; case POWERPC_EXCP_SDOOR: return "SDOOR"; case POWERPC_EXCP_SDOOR_HV: return "SDOOR_HV"; case POWERPC_EXCP_HVIRT: return "HVIRT"; case POWERPC_EXCP_SYSCALL_VECTORED: return "SYSCALL_VECTORED"; default: g_assert_not_reached(); } } static void dump_syscall(CPUPPCState *env) { qemu_log_mask(CPU_LOG_INT, "syscall r0=%016" PRIx64 " r3=%016" PRIx64 " r4=%016" PRIx64 " r5=%016" PRIx64 " r6=%016" PRIx64 " r7=%016" PRIx64 " r8=%016" PRIx64 " nip=" TARGET_FMT_lx "\n", ppc_dump_gpr(env, 0), ppc_dump_gpr(env, 3), ppc_dump_gpr(env, 4), ppc_dump_gpr(env, 5), ppc_dump_gpr(env, 6), ppc_dump_gpr(env, 7), ppc_dump_gpr(env, 8), env->nip); } static void dump_hcall(CPUPPCState *env) { qemu_log_mask(CPU_LOG_INT, "hypercall r3=%016" PRIx64 " r4=%016" PRIx64 " r5=%016" PRIx64 " r6=%016" PRIx64 " r7=%016" PRIx64 " r8=%016" PRIx64 " r9=%016" PRIx64 " r10=%016" PRIx64 " r11=%016" PRIx64 " r12=%016" PRIx64 " nip=" TARGET_FMT_lx "\n", ppc_dump_gpr(env, 3), ppc_dump_gpr(env, 4), ppc_dump_gpr(env, 5), ppc_dump_gpr(env, 6), ppc_dump_gpr(env, 7), ppc_dump_gpr(env, 8), ppc_dump_gpr(env, 9), ppc_dump_gpr(env, 10), ppc_dump_gpr(env, 11), ppc_dump_gpr(env, 12), env->nip); } static void ppc_excp_debug_sw_tlb(CPUPPCState *env, int excp) { const char *es; target_ulong *miss, *cmp; int en; if (!qemu_loglevel_mask(CPU_LOG_MMU)) { return; } if (excp == POWERPC_EXCP_IFTLB) { es = "I"; en = 'I'; miss = &env->spr[SPR_IMISS]; cmp = &env->spr[SPR_ICMP]; } else { if (excp == POWERPC_EXCP_DLTLB) { es = "DL"; } else { es = "DS"; } en = 'D'; miss = &env->spr[SPR_DMISS]; cmp = &env->spr[SPR_DCMP]; } qemu_log("6xx %sTLB miss: %cM " TARGET_FMT_lx " %cC " TARGET_FMT_lx " H1 " TARGET_FMT_lx " H2 " TARGET_FMT_lx " %08x\n", es, en, *miss, en, *cmp, env->spr[SPR_HASH1], env->spr[SPR_HASH2], env->error_code); } static int powerpc_reset_wakeup(CPUState *cs, CPUPPCState *env, int excp, target_ulong *msr) { /* We no longer are in a PM state */ env->resume_as_sreset = false; /* Pretend to be returning from doze always as we don't lose state */ *msr |= SRR1_WS_NOLOSS; /* Machine checks are sent normally */ if (excp == POWERPC_EXCP_MCHECK) { return excp; } switch (excp) { case POWERPC_EXCP_RESET: *msr |= SRR1_WAKERESET; break; case POWERPC_EXCP_EXTERNAL: *msr |= SRR1_WAKEEE; break; case POWERPC_EXCP_DECR: *msr |= SRR1_WAKEDEC; break; case POWERPC_EXCP_SDOOR: *msr |= SRR1_WAKEDBELL; break; case POWERPC_EXCP_SDOOR_HV: *msr |= SRR1_WAKEHDBELL; break; case POWERPC_EXCP_HV_MAINT: *msr |= SRR1_WAKEHMI; break; case POWERPC_EXCP_HVIRT: *msr |= SRR1_WAKEHVI; break; default: cpu_abort(cs, "Unsupported exception %d in Power Save mode\n", excp); } return POWERPC_EXCP_RESET; } /* * AIL - Alternate Interrupt Location, a mode that allows interrupts to be * taken with the MMU on, and which uses an alternate location (e.g., so the * kernel/hv can map the vectors there with an effective address). * * An interrupt is considered to be taken "with AIL" or "AIL applies" if they * are delivered in this way. AIL requires the LPCR to be set to enable this * mode, and then a number of conditions have to be true for AIL to apply. * * First of all, SRESET, MCE, and HMI are always delivered without AIL, because * they specifically want to be in real mode (e.g., the MCE might be signaling * a SLB multi-hit which requires SLB flush before the MMU can be enabled). * * After that, behaviour depends on the current MSR[IR], MSR[DR], MSR[HV], * whether or not the interrupt changes MSR[HV] from 0 to 1, and the current * radix mode (LPCR[HR]). * * POWER8, POWER9 with LPCR[HR]=0 * | LPCR[AIL] | MSR[IR||DR] | MSR[HV] | new MSR[HV] | AIL | * +-----------+-------------+---------+-------------+-----+ * | a | 00/01/10 | x | x | 0 | * | a | 11 | 0 | 1 | 0 | * | a | 11 | 1 | 1 | a | * | a | 11 | 0 | 0 | a | * +-------------------------------------------------------+ * * POWER9 with LPCR[HR]=1 * | LPCR[AIL] | MSR[IR||DR] | MSR[HV] | new MSR[HV] | AIL | * +-----------+-------------+---------+-------------+-----+ * | a | 00/01/10 | x | x | 0 | * | a | 11 | x | x | a | * +-------------------------------------------------------+ * * The difference with POWER9 being that MSR[HV] 0->1 interrupts can be sent to * the hypervisor in AIL mode if the guest is radix. This is good for * performance but allows the guest to influence the AIL of hypervisor * interrupts using its MSR, and also the hypervisor must disallow guest * interrupts (MSR[HV] 0->0) from using AIL if the hypervisor does not want to * use AIL for its MSR[HV] 0->1 interrupts. * * POWER10 addresses those issues with a new LPCR[HAIL] bit that is applied to * interrupts that begin execution with MSR[HV]=1 (so both MSR[HV] 0->1 and * MSR[HV] 1->1). * * HAIL=1 is equivalent to AIL=3, for interrupts delivered with MSR[HV]=1. * * POWER10 behaviour is * | LPCR[AIL] | LPCR[HAIL] | MSR[IR||DR] | MSR[HV] | new MSR[HV] | AIL | * +-----------+------------+-------------+---------+-------------+-----+ * | a | h | 00/01/10 | 0 | 0 | 0 | * | a | h | 11 | 0 | 0 | a | * | a | h | x | 0 | 1 | h | * | a | h | 00/01/10 | 1 | 1 | 0 | * | a | h | 11 | 1 | 1 | h | * +--------------------------------------------------------------------+ */ static void ppc_excp_apply_ail(PowerPCCPU *cpu, int excp_model, int excp, target_ulong msr, target_ulong *new_msr, target_ulong *vector) { #if defined(TARGET_PPC64) CPUPPCState *env = &cpu->env; bool mmu_all_on = ((msr >> MSR_IR) & 1) && ((msr >> MSR_DR) & 1); bool hv_escalation = !(msr & MSR_HVB) && (*new_msr & MSR_HVB); int ail = 0; if (excp == POWERPC_EXCP_MCHECK || excp == POWERPC_EXCP_RESET || excp == POWERPC_EXCP_HV_MAINT) { /* SRESET, MCE, HMI never apply AIL */ return; } if (excp_model == POWERPC_EXCP_POWER8 || excp_model == POWERPC_EXCP_POWER9) { if (!mmu_all_on) { /* AIL only works if MSR[IR] and MSR[DR] are both enabled. */ return; } if (hv_escalation && !(env->spr[SPR_LPCR] & LPCR_HR)) { /* * AIL does not work if there is a MSR[HV] 0->1 transition and the * partition is in HPT mode. For radix guests, such interrupts are * allowed to be delivered to the hypervisor in ail mode. */ return; } ail = (env->spr[SPR_LPCR] & LPCR_AIL) >> LPCR_AIL_SHIFT; if (ail == 0) { return; } if (ail == 1) { /* AIL=1 is reserved, treat it like AIL=0 */ return; } } else if (excp_model == POWERPC_EXCP_POWER10) { if (!mmu_all_on && !hv_escalation) { /* * AIL works for HV interrupts even with guest MSR[IR/DR] disabled. * Guest->guest and HV->HV interrupts do require MMU on. */ return; } if (*new_msr & MSR_HVB) { if (!(env->spr[SPR_LPCR] & LPCR_HAIL)) { /* HV interrupts depend on LPCR[HAIL] */ return; } ail = 3; /* HAIL=1 gives AIL=3 behaviour for HV interrupts */ } else { ail = (env->spr[SPR_LPCR] & LPCR_AIL) >> LPCR_AIL_SHIFT; } if (ail == 0) { return; } if (ail == 1 || ail == 2) { /* AIL=1 and AIL=2 are reserved, treat them like AIL=0 */ return; } } else { /* Other processors do not support AIL */ return; } /* * AIL applies, so the new MSR gets IR and DR set, and an offset applied * to the new IP. */ *new_msr |= (1 << MSR_IR) | (1 << MSR_DR); if (excp != POWERPC_EXCP_SYSCALL_VECTORED) { if (ail == 2) { *vector |= 0x0000000000018000ull; } else if (ail == 3) { *vector |= 0xc000000000004000ull; } } else { /* * scv AIL is a little different. AIL=2 does not change the address, * only the MSR. AIL=3 replaces the 0x17000 base with 0xc...3000. */ if (ail == 3) { *vector &= ~0x0000000000017000ull; /* Un-apply the base offset */ *vector |= 0xc000000000003000ull; /* Apply scv's AIL=3 offset */ } } #endif } static void powerpc_set_excp_state(PowerPCCPU *cpu, target_ulong vector, target_ulong msr) { CPUState *cs = CPU(cpu); CPUPPCState *env = &cpu->env; /* * We don't use hreg_store_msr here as already have treated any * special case that could occur. Just store MSR and update hflags * * Note: We *MUST* not use hreg_store_msr() as-is anyway because it * will prevent setting of the HV bit which some exceptions might need * to do. */ env->msr = msr & env->msr_mask; hreg_compute_hflags(env); env->nip = vector; /* Reset exception state */ cs->exception_index = POWERPC_EXCP_NONE; env->error_code = 0; /* Reset the reservation */ env->reserve_addr = -1; /* * Any interrupt is context synchronizing, check if TCG TLB needs * a delayed flush on ppc64 */ check_tlb_flush(env, false); } static void powerpc_excp_40x(PowerPCCPU *cpu, int excp) { CPUState *cs = CPU(cpu); CPUPPCState *env = &cpu->env; target_ulong msr, new_msr, vector; int srr0, srr1; if (excp <= POWERPC_EXCP_NONE || excp >= POWERPC_EXCP_NB) { cpu_abort(cs, "Invalid PowerPC exception %d. Aborting\n", excp); } qemu_log_mask(CPU_LOG_INT, "Raise exception at " TARGET_FMT_lx " => %s (%d) error=%02x\n", env->nip, powerpc_excp_name(excp), excp, env->error_code); /* new srr1 value excluding must-be-zero bits */ msr = env->msr & ~0x783f0000ULL; /* * new interrupt handler msr preserves existing ME unless * explicitly overriden. */ new_msr = env->msr & (((target_ulong)1 << MSR_ME)); /* target registers */ srr0 = SPR_SRR0; srr1 = SPR_SRR1; /* * Hypervisor emulation assistance interrupt only exists on server * arch 2.05 server or later. */ if (excp == POWERPC_EXCP_HV_EMU) { excp = POWERPC_EXCP_PROGRAM; } vector = env->excp_vectors[excp]; if (vector == (target_ulong)-1ULL) { cpu_abort(cs, "Raised an exception without defined vector %d\n", excp); } vector |= env->excp_prefix; switch (excp) { case POWERPC_EXCP_CRITICAL: /* Critical input */ srr0 = SPR_40x_SRR2; srr1 = SPR_40x_SRR3; break; case POWERPC_EXCP_MCHECK: /* Machine check exception */ if (msr_me == 0) { /* * Machine check exception is not enabled. Enter * checkstop state. */ fprintf(stderr, "Machine check while not allowed. " "Entering checkstop state\n"); if (qemu_log_separate()) { qemu_log("Machine check while not allowed. " "Entering checkstop state\n"); } cs->halted = 1; cpu_interrupt_exittb(cs); } /* machine check exceptions don't have ME set */ new_msr &= ~((target_ulong)1 << MSR_ME); srr0 = SPR_40x_SRR2; srr1 = SPR_40x_SRR3; break; case POWERPC_EXCP_DSI: /* Data storage exception */ trace_ppc_excp_dsi(env->spr[SPR_40x_ESR], env->spr[SPR_40x_DEAR]); break; case POWERPC_EXCP_ISI: /* Instruction storage exception */ trace_ppc_excp_isi(msr, env->nip); break; case POWERPC_EXCP_EXTERNAL: /* External input */ break; case POWERPC_EXCP_ALIGN: /* Alignment exception */ break; case POWERPC_EXCP_PROGRAM: /* Program exception */ switch (env->error_code & ~0xF) { case POWERPC_EXCP_FP: if ((msr_fe0 == 0 && msr_fe1 == 0) || msr_fp == 0) { trace_ppc_excp_fp_ignore(); cs->exception_index = POWERPC_EXCP_NONE; env->error_code = 0; return; } env->spr[SPR_40x_ESR] = ESR_FP; break; case POWERPC_EXCP_INVAL: trace_ppc_excp_inval(env->nip); env->spr[SPR_40x_ESR] = ESR_PIL; break; case POWERPC_EXCP_PRIV: env->spr[SPR_40x_ESR] = ESR_PPR; break; case POWERPC_EXCP_TRAP: env->spr[SPR_40x_ESR] = ESR_PTR; break; default: cpu_abort(cs, "Invalid program exception %d. Aborting\n", env->error_code); break; } break; case POWERPC_EXCP_SYSCALL: /* System call exception */ dump_syscall(env); /* * We need to correct the NIP which in this case is supposed * to point to the next instruction */ env->nip += 4; break; case POWERPC_EXCP_FIT: /* Fixed-interval timer interrupt */ trace_ppc_excp_print("FIT"); break; case POWERPC_EXCP_WDT: /* Watchdog timer interrupt */ trace_ppc_excp_print("WDT"); break; case POWERPC_EXCP_DTLB: /* Data TLB error */ case POWERPC_EXCP_ITLB: /* Instruction TLB error */ break; case POWERPC_EXCP_PIT: /* Programmable interval timer interrupt */ trace_ppc_excp_print("PIT"); break; case POWERPC_EXCP_DEBUG: /* Debug interrupt */ cpu_abort(cs, "%s exception not implemented\n", powerpc_excp_name(excp)); break; default: cpu_abort(cs, "Invalid PowerPC exception %d. Aborting\n", excp); break; } /* Sanity check */ if (!(env->msr_mask & MSR_HVB)) { if (new_msr & MSR_HVB) { cpu_abort(cs, "Trying to deliver HV exception (MSR) %d with " "no HV support\n", excp); } if (srr0 == SPR_HSRR0) { cpu_abort(cs, "Trying to deliver HV exception (HSRR) %d with " "no HV support\n", excp); } } /* Save PC */ env->spr[srr0] = env->nip; /* Save MSR */ env->spr[srr1] = msr; powerpc_set_excp_state(cpu, vector, new_msr); } static void powerpc_excp_74xx(PowerPCCPU *cpu, int excp) { CPUState *cs = CPU(cpu); CPUPPCState *env = &cpu->env; target_ulong msr, new_msr, vector; if (excp <= POWERPC_EXCP_NONE || excp >= POWERPC_EXCP_NB) { cpu_abort(cs, "Invalid PowerPC exception %d. Aborting\n", excp); } qemu_log_mask(CPU_LOG_INT, "Raise exception at " TARGET_FMT_lx " => %s (%d) error=%02x\n", env->nip, powerpc_excp_name(excp), excp, env->error_code); /* new srr1 value excluding must-be-zero bits */ msr = env->msr & ~0x783f0000ULL; /* * new interrupt handler msr preserves existing ME unless * explicitly overriden */ new_msr = env->msr & ((target_ulong)1 << MSR_ME); /* * Hypervisor emulation assistance interrupt only exists on server * arch 2.05 server or later. */ if (excp == POWERPC_EXCP_HV_EMU) { excp = POWERPC_EXCP_PROGRAM; } vector = env->excp_vectors[excp]; if (vector == (target_ulong)-1ULL) { cpu_abort(cs, "Raised an exception without defined vector %d\n", excp); } vector |= env->excp_prefix; switch (excp) { case POWERPC_EXCP_MCHECK: /* Machine check exception */ if (msr_me == 0) { /* * Machine check exception is not enabled. Enter * checkstop state. */ fprintf(stderr, "Machine check while not allowed. " "Entering checkstop state\n"); if (qemu_log_separate()) { qemu_log("Machine check while not allowed. " "Entering checkstop state\n"); } cs->halted = 1; cpu_interrupt_exittb(cs); } /* machine check exceptions don't have ME set */ new_msr &= ~((target_ulong)1 << MSR_ME); break; case POWERPC_EXCP_DSI: /* Data storage exception */ trace_ppc_excp_dsi(env->spr[SPR_DSISR], env->spr[SPR_DAR]); break; case POWERPC_EXCP_ISI: /* Instruction storage exception */ trace_ppc_excp_isi(msr, env->nip); msr |= env->error_code; break; case POWERPC_EXCP_EXTERNAL: /* External input */ break; case POWERPC_EXCP_ALIGN: /* Alignment exception */ /* Get rS/rD and rA from faulting opcode */ /* * Note: the opcode fields will not be set properly for a * direct store load/store, but nobody cares as nobody * actually uses direct store segments. */ env->spr[SPR_DSISR] |= (env->error_code & 0x03FF0000) >> 16; break; case POWERPC_EXCP_PROGRAM: /* Program exception */ switch (env->error_code & ~0xF) { case POWERPC_EXCP_FP: if ((msr_fe0 == 0 && msr_fe1 == 0) || msr_fp == 0) { trace_ppc_excp_fp_ignore(); cs->exception_index = POWERPC_EXCP_NONE; env->error_code = 0; return; } /* * FP exceptions always have NIP pointing to the faulting * instruction, so always use store_next and claim we are * precise in the MSR. */ msr |= 0x00100000; break; case POWERPC_EXCP_INVAL: trace_ppc_excp_inval(env->nip); msr |= 0x00080000; break; case POWERPC_EXCP_PRIV: msr |= 0x00040000; break; case POWERPC_EXCP_TRAP: msr |= 0x00020000; break; default: /* Should never occur */ cpu_abort(cs, "Invalid program exception %d. Aborting\n", env->error_code); break; } break; case POWERPC_EXCP_SYSCALL: /* System call exception */ { int lev = env->error_code; if ((lev == 1) && cpu->vhyp) { dump_hcall(env); } else { dump_syscall(env); } /* * We need to correct the NIP which in this case is supposed * to point to the next instruction */ env->nip += 4; /* * The Virtual Open Firmware (VOF) relies on the 'sc 1' * instruction to communicate with QEMU. The pegasos2 machine * uses VOF and the 74xx CPUs, so although the 74xx don't have * HV mode, we need to keep hypercall support. */ if ((lev == 1) && cpu->vhyp) { PPCVirtualHypervisorClass *vhc = PPC_VIRTUAL_HYPERVISOR_GET_CLASS(cpu->vhyp); vhc->hypercall(cpu->vhyp, cpu); return; } break; } case POWERPC_EXCP_FPU: /* Floating-point unavailable exception */ case POWERPC_EXCP_DECR: /* Decrementer exception */ break; case POWERPC_EXCP_RESET: /* System reset exception */ if (msr_pow) { cpu_abort(cs, "Trying to deliver power-saving system reset " "exception %d with no HV support\n", excp); } break; case POWERPC_EXCP_TRACE: /* Trace exception */ break; case POWERPC_EXCP_VPU: /* Vector unavailable exception */ break; case POWERPC_EXCP_IABR: /* Instruction address breakpoint */ case POWERPC_EXCP_SMI: /* System management interrupt */ case POWERPC_EXCP_THERM: /* Thermal interrupt */ case POWERPC_EXCP_PERFM: /* Embedded performance monitor interrupt */ case POWERPC_EXCP_VPUA: /* Vector assist exception */ cpu_abort(cs, "%s exception not implemented\n", powerpc_excp_name(excp)); break; default: cpu_abort(cs, "Invalid PowerPC exception %d. Aborting\n", excp); break; } /* Sanity check */ if (!(env->msr_mask & MSR_HVB)) { if (new_msr & MSR_HVB) { cpu_abort(cs, "Trying to deliver HV exception (MSR) %d with " "no HV support\n", excp); } } /* * Sort out endianness of interrupt, this differs depending on the * CPU, the HV mode, etc... */ if (ppc_interrupts_little_endian(cpu, !!(new_msr & MSR_HVB))) { new_msr |= (target_ulong)1 << MSR_LE; } /* Save PC */ env->spr[SPR_SRR0] = env->nip; /* Save MSR */ env->spr[SPR_SRR1] = msr; powerpc_set_excp_state(cpu, vector, new_msr); } #ifdef TARGET_PPC64 static void powerpc_excp_books(PowerPCCPU *cpu, int excp) { CPUState *cs = CPU(cpu); CPUPPCState *env = &cpu->env; int excp_model = env->excp_model; target_ulong msr, new_msr, vector; int srr0, srr1, lev = -1; if (excp <= POWERPC_EXCP_NONE || excp >= POWERPC_EXCP_NB) { cpu_abort(cs, "Invalid PowerPC exception %d. Aborting\n", excp); } qemu_log_mask(CPU_LOG_INT, "Raise exception at " TARGET_FMT_lx " => %s (%d) error=%02x\n", env->nip, powerpc_excp_name(excp), excp, env->error_code); /* new srr1 value excluding must-be-zero bits */ msr = env->msr & ~0x783f0000ULL; /* * new interrupt handler msr preserves existing HV and ME unless * explicitly overriden */ new_msr = env->msr & (((target_ulong)1 << MSR_ME) | MSR_HVB); /* target registers */ srr0 = SPR_SRR0; srr1 = SPR_SRR1; /* * check for special resume at 0x100 from doze/nap/sleep/winkle on * P7/P8/P9 */ if (env->resume_as_sreset) { excp = powerpc_reset_wakeup(cs, env, excp, &msr); } /* * We don't want to generate a Hypervisor Emulation Assistance * Interrupt if we don't have HVB in msr_mask (PAPR mode). */ if (excp == POWERPC_EXCP_HV_EMU && !(env->msr_mask & MSR_HVB)) { excp = POWERPC_EXCP_PROGRAM; } vector = env->excp_vectors[excp]; if (vector == (target_ulong)-1ULL) { cpu_abort(cs, "Raised an exception without defined vector %d\n", excp); } vector |= env->excp_prefix; switch (excp) { case POWERPC_EXCP_MCHECK: /* Machine check exception */ if (msr_me == 0) { /* * Machine check exception is not enabled. Enter * checkstop state. */ fprintf(stderr, "Machine check while not allowed. " "Entering checkstop state\n"); if (qemu_log_separate()) { qemu_log("Machine check while not allowed. " "Entering checkstop state\n"); } cs->halted = 1; cpu_interrupt_exittb(cs); } if (env->msr_mask & MSR_HVB) { /* * ISA specifies HV, but can be delivered to guest with HV * clear (e.g., see FWNMI in PAPR). */ new_msr |= (target_ulong)MSR_HVB; } /* machine check exceptions don't have ME set */ new_msr &= ~((target_ulong)1 << MSR_ME); break; case POWERPC_EXCP_DSI: /* Data storage exception */ trace_ppc_excp_dsi(env->spr[SPR_DSISR], env->spr[SPR_DAR]); break; case POWERPC_EXCP_ISI: /* Instruction storage exception */ trace_ppc_excp_isi(msr, env->nip); msr |= env->error_code; break; case POWERPC_EXCP_EXTERNAL: /* External input */ { bool lpes0; /* * LPES0 is only taken into consideration if we support HV * mode for this CPU. */ if (!env->has_hv_mode) { break; } lpes0 = !!(env->spr[SPR_LPCR] & LPCR_LPES0); if (!lpes0) { new_msr |= (target_ulong)MSR_HVB; new_msr |= env->msr & ((target_ulong)1 << MSR_RI); srr0 = SPR_HSRR0; srr1 = SPR_HSRR1; } break; } case POWERPC_EXCP_ALIGN: /* Alignment exception */ /* Get rS/rD and rA from faulting opcode */ /* * Note: the opcode fields will not be set properly for a * direct store load/store, but nobody cares as nobody * actually uses direct store segments. */ env->spr[SPR_DSISR] |= (env->error_code & 0x03FF0000) >> 16; break; case POWERPC_EXCP_PROGRAM: /* Program exception */ switch (env->error_code & ~0xF) { case POWERPC_EXCP_FP: if ((msr_fe0 == 0 && msr_fe1 == 0) || msr_fp == 0) { trace_ppc_excp_fp_ignore(); cs->exception_index = POWERPC_EXCP_NONE; env->error_code = 0; return; } /* * FP exceptions always have NIP pointing to the faulting * instruction, so always use store_next and claim we are * precise in the MSR. */ msr |= 0x00100000; break; case POWERPC_EXCP_INVAL: trace_ppc_excp_inval(env->nip); msr |= 0x00080000; break; case POWERPC_EXCP_PRIV: msr |= 0x00040000; break; case POWERPC_EXCP_TRAP: msr |= 0x00020000; break; default: /* Should never occur */ cpu_abort(cs, "Invalid program exception %d. Aborting\n", env->error_code); break; } break; case POWERPC_EXCP_SYSCALL: /* System call exception */ lev = env->error_code; if ((lev == 1) && cpu->vhyp) { dump_hcall(env); } else { dump_syscall(env); } /* * We need to correct the NIP which in this case is supposed * to point to the next instruction */ env->nip += 4; /* "PAPR mode" built-in hypercall emulation */ if ((lev == 1) && cpu->vhyp) { PPCVirtualHypervisorClass *vhc = PPC_VIRTUAL_HYPERVISOR_GET_CLASS(cpu->vhyp); vhc->hypercall(cpu->vhyp, cpu); return; } if (lev == 1) { new_msr |= (target_ulong)MSR_HVB; } break; case POWERPC_EXCP_SYSCALL_VECTORED: /* scv exception */ lev = env->error_code; dump_syscall(env); env->nip += 4; new_msr |= env->msr & ((target_ulong)1 << MSR_EE); new_msr |= env->msr & ((target_ulong)1 << MSR_RI); vector += lev * 0x20; env->lr = env->nip; env->ctr = msr; break; case POWERPC_EXCP_FPU: /* Floating-point unavailable exception */ case POWERPC_EXCP_DECR: /* Decrementer exception */ break; case POWERPC_EXCP_RESET: /* System reset exception */ /* A power-saving exception sets ME, otherwise it is unchanged */ if (msr_pow) { /* indicate that we resumed from power save mode */ msr |= 0x10000; new_msr |= ((target_ulong)1 << MSR_ME); } if (env->msr_mask & MSR_HVB) { /* * ISA specifies HV, but can be delivered to guest with HV * clear (e.g., see FWNMI in PAPR, NMI injection in QEMU). */ new_msr |= (target_ulong)MSR_HVB; } else { if (msr_pow) { cpu_abort(cs, "Trying to deliver power-saving system reset " "exception %d with no HV support\n", excp); } } break; case POWERPC_EXCP_DSEG: /* Data segment exception */ case POWERPC_EXCP_ISEG: /* Instruction segment exception */ case POWERPC_EXCP_TRACE: /* Trace exception */ break; case POWERPC_EXCP_HISI: /* Hypervisor instruction storage exception */ msr |= env->error_code; /* fall through */ case POWERPC_EXCP_HDECR: /* Hypervisor decrementer exception */ case POWERPC_EXCP_HDSI: /* Hypervisor data storage exception */ case POWERPC_EXCP_SDOOR_HV: /* Hypervisor Doorbell interrupt */ case POWERPC_EXCP_HV_EMU: case POWERPC_EXCP_HVIRT: /* Hypervisor virtualization */ srr0 = SPR_HSRR0; srr1 = SPR_HSRR1; new_msr |= (target_ulong)MSR_HVB; new_msr |= env->msr & ((target_ulong)1 << MSR_RI); break; case POWERPC_EXCP_VPU: /* Vector unavailable exception */ case POWERPC_EXCP_VSXU: /* VSX unavailable exception */ case POWERPC_EXCP_FU: /* Facility unavailable exception */ env->spr[SPR_FSCR] |= ((target_ulong)env->error_code << 56); break; case POWERPC_EXCP_HV_FU: /* Hypervisor Facility Unavailable Exception */ env->spr[SPR_HFSCR] |= ((target_ulong)env->error_code << FSCR_IC_POS); srr0 = SPR_HSRR0; srr1 = SPR_HSRR1; new_msr |= (target_ulong)MSR_HVB; new_msr |= env->msr & ((target_ulong)1 << MSR_RI); break; case POWERPC_EXCP_THERM: /* Thermal interrupt */ case POWERPC_EXCP_PERFM: /* Embedded performance monitor interrupt */ case POWERPC_EXCP_VPUA: /* Vector assist exception */ case POWERPC_EXCP_MAINT: /* Maintenance exception */ case POWERPC_EXCP_SDOOR: /* Doorbell interrupt */ case POWERPC_EXCP_HV_MAINT: /* Hypervisor Maintenance exception */ cpu_abort(cs, "%s exception not implemented\n", powerpc_excp_name(excp)); break; default: cpu_abort(cs, "Invalid PowerPC exception %d. Aborting\n", excp); break; } /* Sanity check */ if (!(env->msr_mask & MSR_HVB)) { if (new_msr & MSR_HVB) { cpu_abort(cs, "Trying to deliver HV exception (MSR) %d with " "no HV support\n", excp); } if (srr0 == SPR_HSRR0) { cpu_abort(cs, "Trying to deliver HV exception (HSRR) %d with " "no HV support\n", excp); } } /* * Sort out endianness of interrupt, this differs depending on the * CPU, the HV mode, etc... */ if (ppc_interrupts_little_endian(cpu, !!(new_msr & MSR_HVB))) { new_msr |= (target_ulong)1 << MSR_LE; } new_msr |= (target_ulong)1 << MSR_SF; if (excp != POWERPC_EXCP_SYSCALL_VECTORED) { /* Save PC */ env->spr[srr0] = env->nip; /* Save MSR */ env->spr[srr1] = msr; } /* This can update new_msr and vector if AIL applies */ ppc_excp_apply_ail(cpu, excp_model, excp, msr, &new_msr, &vector); powerpc_set_excp_state(cpu, vector, new_msr); } #else static inline void powerpc_excp_books(PowerPCCPU *cpu, int excp) { g_assert_not_reached(); } #endif /* * Note that this function should be greatly optimized when called * with a constant excp, from ppc_hw_interrupt */ static inline void powerpc_excp_legacy(PowerPCCPU *cpu, int excp) { CPUState *cs = CPU(cpu); CPUPPCState *env = &cpu->env; int excp_model = env->excp_model; target_ulong msr, new_msr, vector; int srr0, srr1, lev = -1; if (excp <= POWERPC_EXCP_NONE || excp >= POWERPC_EXCP_NB) { cpu_abort(cs, "Invalid PowerPC exception %d. Aborting\n", excp); } qemu_log_mask(CPU_LOG_INT, "Raise exception at " TARGET_FMT_lx " => %s (%d) error=%02x\n", env->nip, powerpc_excp_name(excp), excp, env->error_code); /* new srr1 value excluding must-be-zero bits */ if (excp_model == POWERPC_EXCP_BOOKE) { msr = env->msr; } else { msr = env->msr & ~0x783f0000ULL; } /* * new interrupt handler msr preserves existing HV and ME unless * explicitly overriden */ new_msr = env->msr & (((target_ulong)1 << MSR_ME) | MSR_HVB); /* target registers */ srr0 = SPR_SRR0; srr1 = SPR_SRR1; /* * check for special resume at 0x100 from doze/nap/sleep/winkle on * P7/P8/P9 */ if (env->resume_as_sreset) { excp = powerpc_reset_wakeup(cs, env, excp, &msr); } /* * Hypervisor emulation assistance interrupt only exists on server * arch 2.05 server or later. We also don't want to generate it if * we don't have HVB in msr_mask (PAPR mode). */ if (excp == POWERPC_EXCP_HV_EMU #if defined(TARGET_PPC64) && !(mmu_is_64bit(env->mmu_model) && (env->msr_mask & MSR_HVB)) #endif /* defined(TARGET_PPC64) */ ) { excp = POWERPC_EXCP_PROGRAM; } #ifdef TARGET_PPC64 /* * SPEU and VPU share the same IVOR but they exist in different * processors. SPEU is e500v1/2 only and VPU is e6500 only. */ if (excp_model == POWERPC_EXCP_BOOKE && excp == POWERPC_EXCP_VPU) { excp = POWERPC_EXCP_SPEU; } #endif vector = env->excp_vectors[excp]; if (vector == (target_ulong)-1ULL) { cpu_abort(cs, "Raised an exception without defined vector %d\n", excp); } vector |= env->excp_prefix; switch (excp) { case POWERPC_EXCP_CRITICAL: /* Critical input */ switch (excp_model) { case POWERPC_EXCP_40x: srr0 = SPR_40x_SRR2; srr1 = SPR_40x_SRR3; break; case POWERPC_EXCP_BOOKE: srr0 = SPR_BOOKE_CSRR0; srr1 = SPR_BOOKE_CSRR1; break; case POWERPC_EXCP_G2: break; default: goto excp_invalid; } break; case POWERPC_EXCP_MCHECK: /* Machine check exception */ if (msr_me == 0) { /* * Machine check exception is not enabled. Enter * checkstop state. */ fprintf(stderr, "Machine check while not allowed. " "Entering checkstop state\n"); if (qemu_log_separate()) { qemu_log("Machine check while not allowed. " "Entering checkstop state\n"); } cs->halted = 1; cpu_interrupt_exittb(cs); } if (env->msr_mask & MSR_HVB) { /* * ISA specifies HV, but can be delivered to guest with HV * clear (e.g., see FWNMI in PAPR). */ new_msr |= (target_ulong)MSR_HVB; } /* machine check exceptions don't have ME set */ new_msr &= ~((target_ulong)1 << MSR_ME); /* XXX: should also have something loaded in DAR / DSISR */ switch (excp_model) { case POWERPC_EXCP_40x: srr0 = SPR_40x_SRR2; srr1 = SPR_40x_SRR3; break; case POWERPC_EXCP_BOOKE: /* FIXME: choose one or the other based on CPU type */ srr0 = SPR_BOOKE_MCSRR0; srr1 = SPR_BOOKE_MCSRR1; env->spr[SPR_BOOKE_CSRR0] = env->nip; env->spr[SPR_BOOKE_CSRR1] = msr; break; default: break; } break; case POWERPC_EXCP_DSI: /* Data storage exception */ trace_ppc_excp_dsi(env->spr[SPR_DSISR], env->spr[SPR_DAR]); break; case POWERPC_EXCP_ISI: /* Instruction storage exception */ trace_ppc_excp_isi(msr, env->nip); msr |= env->error_code; break; case POWERPC_EXCP_EXTERNAL: /* External input */ { bool lpes0; cs = CPU(cpu); /* * Exception targeting modifiers * * LPES0 is supported on POWER7/8/9 * LPES1 is not supported (old iSeries mode) * * On anything else, we behave as if LPES0 is 1 * (externals don't alter MSR:HV) */ #if defined(TARGET_PPC64) if (excp_model == POWERPC_EXCP_POWER7 || excp_model == POWERPC_EXCP_POWER8 || excp_model == POWERPC_EXCP_POWER9 || excp_model == POWERPC_EXCP_POWER10) { lpes0 = !!(env->spr[SPR_LPCR] & LPCR_LPES0); } else #endif /* defined(TARGET_PPC64) */ { lpes0 = true; } if (!lpes0) { new_msr |= (target_ulong)MSR_HVB; new_msr |= env->msr & ((target_ulong)1 << MSR_RI); srr0 = SPR_HSRR0; srr1 = SPR_HSRR1; } if (env->mpic_proxy) { /* IACK the IRQ on delivery */ env->spr[SPR_BOOKE_EPR] = ldl_phys(cs->as, env->mpic_iack); } break; } case POWERPC_EXCP_ALIGN: /* Alignment exception */ /* Get rS/rD and rA from faulting opcode */ /* * Note: the opcode fields will not be set properly for a * direct store load/store, but nobody cares as nobody * actually uses direct store segments. */ env->spr[SPR_DSISR] |= (env->error_code & 0x03FF0000) >> 16; break; case POWERPC_EXCP_PROGRAM: /* Program exception */ switch (env->error_code & ~0xF) { case POWERPC_EXCP_FP: if ((msr_fe0 == 0 && msr_fe1 == 0) || msr_fp == 0) { trace_ppc_excp_fp_ignore(); cs->exception_index = POWERPC_EXCP_NONE; env->error_code = 0; return; } /* * FP exceptions always have NIP pointing to the faulting * instruction, so always use store_next and claim we are * precise in the MSR. */ msr |= 0x00100000; env->spr[SPR_BOOKE_ESR] = ESR_FP; break; case POWERPC_EXCP_INVAL: trace_ppc_excp_inval(env->nip); msr |= 0x00080000; env->spr[SPR_BOOKE_ESR] = ESR_PIL; break; case POWERPC_EXCP_PRIV: msr |= 0x00040000; env->spr[SPR_BOOKE_ESR] = ESR_PPR; break; case POWERPC_EXCP_TRAP: msr |= 0x00020000; env->spr[SPR_BOOKE_ESR] = ESR_PTR; break; default: /* Should never occur */ cpu_abort(cs, "Invalid program exception %d. Aborting\n", env->error_code); break; } break; case POWERPC_EXCP_SYSCALL: /* System call exception */ lev = env->error_code; if ((lev == 1) && cpu->vhyp) { dump_hcall(env); } else { dump_syscall(env); } /* * We need to correct the NIP which in this case is supposed * to point to the next instruction */ env->nip += 4; /* "PAPR mode" built-in hypercall emulation */ if ((lev == 1) && cpu->vhyp) { PPCVirtualHypervisorClass *vhc = PPC_VIRTUAL_HYPERVISOR_GET_CLASS(cpu->vhyp); vhc->hypercall(cpu->vhyp, cpu); return; } if (lev == 1) { new_msr |= (target_ulong)MSR_HVB; } break; case POWERPC_EXCP_SYSCALL_VECTORED: /* scv exception */ lev = env->error_code; dump_syscall(env); env->nip += 4; new_msr |= env->msr & ((target_ulong)1 << MSR_EE); new_msr |= env->msr & ((target_ulong)1 << MSR_RI); vector += lev * 0x20; env->lr = env->nip; env->ctr = msr; break; case POWERPC_EXCP_FPU: /* Floating-point unavailable exception */ case POWERPC_EXCP_APU: /* Auxiliary processor unavailable */ case POWERPC_EXCP_DECR: /* Decrementer exception */ break; case POWERPC_EXCP_FIT: /* Fixed-interval timer interrupt */ /* FIT on 4xx */ trace_ppc_excp_print("FIT"); break; case POWERPC_EXCP_WDT: /* Watchdog timer interrupt */ trace_ppc_excp_print("WDT"); switch (excp_model) { case POWERPC_EXCP_BOOKE: srr0 = SPR_BOOKE_CSRR0; srr1 = SPR_BOOKE_CSRR1; break; default: break; } break; case POWERPC_EXCP_DTLB: /* Data TLB error */ case POWERPC_EXCP_ITLB: /* Instruction TLB error */ break; case POWERPC_EXCP_DEBUG: /* Debug interrupt */ if (env->flags & POWERPC_FLAG_DE) { /* FIXME: choose one or the other based on CPU type */ srr0 = SPR_BOOKE_DSRR0; srr1 = SPR_BOOKE_DSRR1; env->spr[SPR_BOOKE_CSRR0] = env->nip; env->spr[SPR_BOOKE_CSRR1] = msr; /* DBSR already modified by caller */ } else { cpu_abort(cs, "Debug exception triggered on unsupported model\n"); } break; case POWERPC_EXCP_SPEU: /* SPE/embedded floating-point unavailable/VPU */ env->spr[SPR_BOOKE_ESR] = ESR_SPV; break; case POWERPC_EXCP_DOORI: /* Embedded doorbell interrupt */ break; case POWERPC_EXCP_DOORCI: /* Embedded doorbell critical interrupt */ srr0 = SPR_BOOKE_CSRR0; srr1 = SPR_BOOKE_CSRR1; break; case POWERPC_EXCP_RESET: /* System reset exception */ /* A power-saving exception sets ME, otherwise it is unchanged */ if (msr_pow) { /* indicate that we resumed from power save mode */ msr |= 0x10000; new_msr |= ((target_ulong)1 << MSR_ME); } if (env->msr_mask & MSR_HVB) { /* * ISA specifies HV, but can be delivered to guest with HV * clear (e.g., see FWNMI in PAPR, NMI injection in QEMU). */ new_msr |= (target_ulong)MSR_HVB; } else { if (msr_pow) { cpu_abort(cs, "Trying to deliver power-saving system reset " "exception %d with no HV support\n", excp); } } break; case POWERPC_EXCP_DSEG: /* Data segment exception */ case POWERPC_EXCP_ISEG: /* Instruction segment exception */ case POWERPC_EXCP_TRACE: /* Trace exception */ break; case POWERPC_EXCP_HISI: /* Hypervisor instruction storage exception */ msr |= env->error_code; /* fall through */ case POWERPC_EXCP_HDECR: /* Hypervisor decrementer exception */ case POWERPC_EXCP_HDSI: /* Hypervisor data storage exception */ case POWERPC_EXCP_HDSEG: /* Hypervisor data segment exception */ case POWERPC_EXCP_HISEG: /* Hypervisor instruction segment exception */ case POWERPC_EXCP_SDOOR_HV: /* Hypervisor Doorbell interrupt */ case POWERPC_EXCP_HV_EMU: case POWERPC_EXCP_HVIRT: /* Hypervisor virtualization */ srr0 = SPR_HSRR0; srr1 = SPR_HSRR1; new_msr |= (target_ulong)MSR_HVB; new_msr |= env->msr & ((target_ulong)1 << MSR_RI); break; case POWERPC_EXCP_VPU: /* Vector unavailable exception */ case POWERPC_EXCP_VSXU: /* VSX unavailable exception */ case POWERPC_EXCP_FU: /* Facility unavailable exception */ #ifdef TARGET_PPC64 env->spr[SPR_FSCR] |= ((target_ulong)env->error_code << 56); #endif break; case POWERPC_EXCP_HV_FU: /* Hypervisor Facility Unavailable Exception */ #ifdef TARGET_PPC64 env->spr[SPR_HFSCR] |= ((target_ulong)env->error_code << FSCR_IC_POS); srr0 = SPR_HSRR0; srr1 = SPR_HSRR1; new_msr |= (target_ulong)MSR_HVB; new_msr |= env->msr & ((target_ulong)1 << MSR_RI); #endif break; case POWERPC_EXCP_PIT: /* Programmable interval timer interrupt */ trace_ppc_excp_print("PIT"); break; case POWERPC_EXCP_IFTLB: /* Instruction fetch TLB error */ case POWERPC_EXCP_DLTLB: /* Data load TLB miss */ case POWERPC_EXCP_DSTLB: /* Data store TLB miss */ switch (excp_model) { case POWERPC_EXCP_603: case POWERPC_EXCP_G2: /* Swap temporary saved registers with GPRs */ if (!(new_msr & ((target_ulong)1 << MSR_TGPR))) { new_msr |= (target_ulong)1 << MSR_TGPR; hreg_swap_gpr_tgpr(env); } /* fall through */ case POWERPC_EXCP_7x5: ppc_excp_debug_sw_tlb(env, excp); msr |= env->crf[0] << 28; msr |= env->error_code; /* key, D/I, S/L bits */ /* Set way using a LRU mechanism */ msr |= ((env->last_way + 1) & (env->nb_ways - 1)) << 17; break; default: cpu_abort(cs, "Invalid TLB miss exception\n"); break; } break; case POWERPC_EXCP_EFPDI: /* Embedded floating-point data interrupt */ case POWERPC_EXCP_EFPRI: /* Embedded floating-point round interrupt */ case POWERPC_EXCP_EPERFM: /* Embedded performance monitor interrupt */ case POWERPC_EXCP_IO: /* IO error exception */ case POWERPC_EXCP_RUNM: /* Run mode exception */ case POWERPC_EXCP_EMUL: /* Emulation trap exception */ case POWERPC_EXCP_FPA: /* Floating-point assist exception */ case POWERPC_EXCP_DABR: /* Data address breakpoint */ case POWERPC_EXCP_IABR: /* Instruction address breakpoint */ case POWERPC_EXCP_SMI: /* System management interrupt */ case POWERPC_EXCP_THERM: /* Thermal interrupt */ case POWERPC_EXCP_PERFM: /* Embedded performance monitor interrupt */ case POWERPC_EXCP_VPUA: /* Vector assist exception */ case POWERPC_EXCP_SOFTP: /* Soft patch exception */ case POWERPC_EXCP_MAINT: /* Maintenance exception */ case POWERPC_EXCP_MEXTBR: /* Maskable external breakpoint */ case POWERPC_EXCP_NMEXTBR: /* Non maskable external breakpoint */ cpu_abort(cs, "%s exception not implemented\n", powerpc_excp_name(excp)); break; default: excp_invalid: cpu_abort(cs, "Invalid PowerPC exception %d. Aborting\n", excp); break; } /* Sanity check */ if (!(env->msr_mask & MSR_HVB)) { if (new_msr & MSR_HVB) { cpu_abort(cs, "Trying to deliver HV exception (MSR) %d with " "no HV support\n", excp); } if (srr0 == SPR_HSRR0) { cpu_abort(cs, "Trying to deliver HV exception (HSRR) %d with " "no HV support\n", excp); } } /* * Sort out endianness of interrupt, this differs depending on the * CPU, the HV mode, etc... */ if (ppc_interrupts_little_endian(cpu, !!(new_msr & MSR_HVB))) { new_msr |= (target_ulong)1 << MSR_LE; } #if defined(TARGET_PPC64) if (excp_model == POWERPC_EXCP_BOOKE) { if (env->spr[SPR_BOOKE_EPCR] & EPCR_ICM) { /* Cat.64-bit: EPCR.ICM is copied to MSR.CM */ new_msr |= (target_ulong)1 << MSR_CM; } else { vector = (uint32_t)vector; } } else { if (!msr_isf && !mmu_is_64bit(env->mmu_model)) { vector = (uint32_t)vector; } else { new_msr |= (target_ulong)1 << MSR_SF; } } #endif if (excp != POWERPC_EXCP_SYSCALL_VECTORED) { /* Save PC */ env->spr[srr0] = env->nip; /* Save MSR */ env->spr[srr1] = msr; } /* This can update new_msr and vector if AIL applies */ ppc_excp_apply_ail(cpu, excp_model, excp, msr, &new_msr, &vector); powerpc_set_excp_state(cpu, vector, new_msr); } static void powerpc_excp(PowerPCCPU *cpu, int excp) { CPUPPCState *env = &cpu->env; switch (env->excp_model) { case POWERPC_EXCP_40x: powerpc_excp_40x(cpu, excp); break; case POWERPC_EXCP_74xx: powerpc_excp_74xx(cpu, excp); break; case POWERPC_EXCP_970: case POWERPC_EXCP_POWER7: case POWERPC_EXCP_POWER8: case POWERPC_EXCP_POWER9: case POWERPC_EXCP_POWER10: powerpc_excp_books(cpu, excp); break; default: powerpc_excp_legacy(cpu, excp); } } void ppc_cpu_do_interrupt(CPUState *cs) { PowerPCCPU *cpu = POWERPC_CPU(cs); powerpc_excp(cpu, cs->exception_index); } static void ppc_hw_interrupt(CPUPPCState *env) { PowerPCCPU *cpu = env_archcpu(env); bool async_deliver; /* External reset */ if (env->pending_interrupts & (1 << PPC_INTERRUPT_RESET)) { env->pending_interrupts &= ~(1 << PPC_INTERRUPT_RESET); powerpc_excp(cpu, POWERPC_EXCP_RESET); return; } /* Machine check exception */ if (env->pending_interrupts & (1 << PPC_INTERRUPT_MCK)) { env->pending_interrupts &= ~(1 << PPC_INTERRUPT_MCK); powerpc_excp(cpu, POWERPC_EXCP_MCHECK); return; } #if 0 /* TODO */ /* External debug exception */ if (env->pending_interrupts & (1 << PPC_INTERRUPT_DEBUG)) { env->pending_interrupts &= ~(1 << PPC_INTERRUPT_DEBUG); powerpc_excp(cpu, POWERPC_EXCP_DEBUG); return; } #endif /* * For interrupts that gate on MSR:EE, we need to do something a * bit more subtle, as we need to let them through even when EE is * clear when coming out of some power management states (in order * for them to become a 0x100). */ async_deliver = (msr_ee != 0) || env->resume_as_sreset; /* Hypervisor decrementer exception */ if (env->pending_interrupts & (1 << PPC_INTERRUPT_HDECR)) { /* LPCR will be clear when not supported so this will work */ bool hdice = !!(env->spr[SPR_LPCR] & LPCR_HDICE); if ((async_deliver || msr_hv == 0) && hdice) { /* HDEC clears on delivery */ env->pending_interrupts &= ~(1 << PPC_INTERRUPT_HDECR); powerpc_excp(cpu, POWERPC_EXCP_HDECR); return; } } /* Hypervisor virtualization interrupt */ if (env->pending_interrupts & (1 << PPC_INTERRUPT_HVIRT)) { /* LPCR will be clear when not supported so this will work */ bool hvice = !!(env->spr[SPR_LPCR] & LPCR_HVICE); if ((async_deliver || msr_hv == 0) && hvice) { powerpc_excp(cpu, POWERPC_EXCP_HVIRT); return; } } /* External interrupt can ignore MSR:EE under some circumstances */ if (env->pending_interrupts & (1 << PPC_INTERRUPT_EXT)) { bool lpes0 = !!(env->spr[SPR_LPCR] & LPCR_LPES0); bool heic = !!(env->spr[SPR_LPCR] & LPCR_HEIC); /* HEIC blocks delivery to the hypervisor */ if ((async_deliver && !(heic && msr_hv && !msr_pr)) || (env->has_hv_mode && msr_hv == 0 && !lpes0)) { powerpc_excp(cpu, POWERPC_EXCP_EXTERNAL); return; } } if (msr_ce != 0) { /* External critical interrupt */ if (env->pending_interrupts & (1 << PPC_INTERRUPT_CEXT)) { powerpc_excp(cpu, POWERPC_EXCP_CRITICAL); return; } } if (async_deliver != 0) { /* Watchdog timer on embedded PowerPC */ if (env->pending_interrupts & (1 << PPC_INTERRUPT_WDT)) { env->pending_interrupts &= ~(1 << PPC_INTERRUPT_WDT); powerpc_excp(cpu, POWERPC_EXCP_WDT); return; } if (env->pending_interrupts & (1 << PPC_INTERRUPT_CDOORBELL)) { env->pending_interrupts &= ~(1 << PPC_INTERRUPT_CDOORBELL); powerpc_excp(cpu, POWERPC_EXCP_DOORCI); return; } /* Fixed interval timer on embedded PowerPC */ if (env->pending_interrupts & (1 << PPC_INTERRUPT_FIT)) { env->pending_interrupts &= ~(1 << PPC_INTERRUPT_FIT); powerpc_excp(cpu, POWERPC_EXCP_FIT); return; } /* Programmable interval timer on embedded PowerPC */ if (env->pending_interrupts & (1 << PPC_INTERRUPT_PIT)) { env->pending_interrupts &= ~(1 << PPC_INTERRUPT_PIT); powerpc_excp(cpu, POWERPC_EXCP_PIT); return; } /* Decrementer exception */ if (env->pending_interrupts & (1 << PPC_INTERRUPT_DECR)) { if (ppc_decr_clear_on_delivery(env)) { env->pending_interrupts &= ~(1 << PPC_INTERRUPT_DECR); } powerpc_excp(cpu, POWERPC_EXCP_DECR); return; } if (env->pending_interrupts & (1 << PPC_INTERRUPT_DOORBELL)) { env->pending_interrupts &= ~(1 << PPC_INTERRUPT_DOORBELL); if (is_book3s_arch2x(env)) { powerpc_excp(cpu, POWERPC_EXCP_SDOOR); } else { powerpc_excp(cpu, POWERPC_EXCP_DOORI); } return; } if (env->pending_interrupts & (1 << PPC_INTERRUPT_HDOORBELL)) { env->pending_interrupts &= ~(1 << PPC_INTERRUPT_HDOORBELL); powerpc_excp(cpu, POWERPC_EXCP_SDOOR_HV); return; } if (env->pending_interrupts & (1 << PPC_INTERRUPT_PERFM)) { env->pending_interrupts &= ~(1 << PPC_INTERRUPT_PERFM); powerpc_excp(cpu, POWERPC_EXCP_PERFM); return; } /* Thermal interrupt */ if (env->pending_interrupts & (1 << PPC_INTERRUPT_THERM)) { env->pending_interrupts &= ~(1 << PPC_INTERRUPT_THERM); powerpc_excp(cpu, POWERPC_EXCP_THERM); return; } } if (env->resume_as_sreset) { /* * This is a bug ! It means that has_work took us out of halt without * anything to deliver while in a PM state that requires getting * out via a 0x100 * * This means we will incorrectly execute past the power management * instruction instead of triggering a reset. * * It generally means a discrepancy between the wakeup conditions in the * processor has_work implementation and the logic in this function. */ cpu_abort(env_cpu(env), "Wakeup from PM state but interrupt Undelivered"); } } void ppc_cpu_do_system_reset(CPUState *cs) { PowerPCCPU *cpu = POWERPC_CPU(cs); powerpc_excp(cpu, POWERPC_EXCP_RESET); } void ppc_cpu_do_fwnmi_machine_check(CPUState *cs, target_ulong vector) { PowerPCCPU *cpu = POWERPC_CPU(cs); CPUPPCState *env = &cpu->env; target_ulong msr = 0; /* * Set MSR and NIP for the handler, SRR0/1, DAR and DSISR have already * been set by KVM. */ msr = (1ULL << MSR_ME); msr |= env->msr & (1ULL << MSR_SF); if (ppc_interrupts_little_endian(cpu, false)) { msr |= (1ULL << MSR_LE); } powerpc_set_excp_state(cpu, vector, msr); } bool ppc_cpu_exec_interrupt(CPUState *cs, int interrupt_request) { PowerPCCPU *cpu = POWERPC_CPU(cs); CPUPPCState *env = &cpu->env; if (interrupt_request & CPU_INTERRUPT_HARD) { ppc_hw_interrupt(env); if (env->pending_interrupts == 0) { cs->interrupt_request &= ~CPU_INTERRUPT_HARD; } return true; } return false; } #endif /* !CONFIG_USER_ONLY */ /*****************************************************************************/ /* Exceptions processing helpers */ void raise_exception_err_ra(CPUPPCState *env, uint32_t exception, uint32_t error_code, uintptr_t raddr) { CPUState *cs = env_cpu(env); cs->exception_index = exception; env->error_code = error_code; cpu_loop_exit_restore(cs, raddr); } void raise_exception_err(CPUPPCState *env, uint32_t exception, uint32_t error_code) { raise_exception_err_ra(env, exception, error_code, 0); } void raise_exception(CPUPPCState *env, uint32_t exception) { raise_exception_err_ra(env, exception, 0, 0); } void raise_exception_ra(CPUPPCState *env, uint32_t exception, uintptr_t raddr) { raise_exception_err_ra(env, exception, 0, raddr); } #ifdef CONFIG_TCG void helper_raise_exception_err(CPUPPCState *env, uint32_t exception, uint32_t error_code) { raise_exception_err_ra(env, exception, error_code, 0); } void helper_raise_exception(CPUPPCState *env, uint32_t exception) { raise_exception_err_ra(env, exception, 0, 0); } #endif #if !defined(CONFIG_USER_ONLY) #ifdef CONFIG_TCG void helper_store_msr(CPUPPCState *env, target_ulong val) { uint32_t excp = hreg_store_msr(env, val, 0); if (excp != 0) { CPUState *cs = env_cpu(env); cpu_interrupt_exittb(cs); raise_exception(env, excp); } } #if defined(TARGET_PPC64) void helper_scv(CPUPPCState *env, uint32_t lev) { if (env->spr[SPR_FSCR] & (1ull << FSCR_SCV)) { raise_exception_err(env, POWERPC_EXCP_SYSCALL_VECTORED, lev); } else { raise_exception_err(env, POWERPC_EXCP_FU, FSCR_IC_SCV); } } void helper_pminsn(CPUPPCState *env, powerpc_pm_insn_t insn) { CPUState *cs; cs = env_cpu(env); cs->halted = 1; /* Condition for waking up at 0x100 */ env->resume_as_sreset = (insn != PPC_PM_STOP) || (env->spr[SPR_PSSCR] & PSSCR_EC); } #endif /* defined(TARGET_PPC64) */ static void do_rfi(CPUPPCState *env, target_ulong nip, target_ulong msr) { CPUState *cs = env_cpu(env); /* MSR:POW cannot be set by any form of rfi */ msr &= ~(1ULL << MSR_POW); /* MSR:TGPR cannot be set by any form of rfi */ if (env->flags & POWERPC_FLAG_TGPR) msr &= ~(1ULL << MSR_TGPR); #if defined(TARGET_PPC64) /* Switching to 32-bit ? Crop the nip */ if (!msr_is_64bit(env, msr)) { nip = (uint32_t)nip; } #else nip = (uint32_t)nip; #endif /* XXX: beware: this is false if VLE is supported */ env->nip = nip & ~((target_ulong)0x00000003); hreg_store_msr(env, msr, 1); trace_ppc_excp_rfi(env->nip, env->msr); /* * No need to raise an exception here, as rfi is always the last * insn of a TB */ cpu_interrupt_exittb(cs); /* Reset the reservation */ env->reserve_addr = -1; /* Context synchronizing: check if TCG TLB needs flush */ check_tlb_flush(env, false); } void helper_rfi(CPUPPCState *env) { do_rfi(env, env->spr[SPR_SRR0], env->spr[SPR_SRR1] & 0xfffffffful); } #define MSR_BOOK3S_MASK #if defined(TARGET_PPC64) void helper_rfid(CPUPPCState *env) { /* * The architecture defines a number of rules for which bits can * change but in practice, we handle this in hreg_store_msr() * which will be called by do_rfi(), so there is no need to filter * here */ do_rfi(env, env->spr[SPR_SRR0], env->spr[SPR_SRR1]); } void helper_rfscv(CPUPPCState *env) { do_rfi(env, env->lr, env->ctr); } void helper_hrfid(CPUPPCState *env) { do_rfi(env, env->spr[SPR_HSRR0], env->spr[SPR_HSRR1]); } #endif #if defined(TARGET_PPC64) && !defined(CONFIG_USER_ONLY) void helper_rfebb(CPUPPCState *env, target_ulong s) { target_ulong msr = env->msr; /* * Handling of BESCR bits 32:33 according to PowerISA v3.1: * * "If BESCR 32:33 != 0b00 the instruction is treated as if * the instruction form were invalid." */ if (env->spr[SPR_BESCR] & BESCR_INVALID) { raise_exception_err(env, POWERPC_EXCP_PROGRAM, POWERPC_EXCP_INVAL | POWERPC_EXCP_INVAL_INVAL); } env->nip = env->spr[SPR_EBBRR]; /* Switching to 32-bit ? Crop the nip */ if (!msr_is_64bit(env, msr)) { env->nip = (uint32_t)env->spr[SPR_EBBRR]; } if (s) { env->spr[SPR_BESCR] |= BESCR_GE; } else { env->spr[SPR_BESCR] &= ~BESCR_GE; } } #endif /*****************************************************************************/ /* Embedded PowerPC specific helpers */ void helper_40x_rfci(CPUPPCState *env) { do_rfi(env, env->spr[SPR_40x_SRR2], env->spr[SPR_40x_SRR3]); } void helper_rfci(CPUPPCState *env) { do_rfi(env, env->spr[SPR_BOOKE_CSRR0], env->spr[SPR_BOOKE_CSRR1]); } void helper_rfdi(CPUPPCState *env) { /* FIXME: choose CSRR1 or DSRR1 based on cpu type */ do_rfi(env, env->spr[SPR_BOOKE_DSRR0], env->spr[SPR_BOOKE_DSRR1]); } void helper_rfmci(CPUPPCState *env) { /* FIXME: choose CSRR1 or MCSRR1 based on cpu type */ do_rfi(env, env->spr[SPR_BOOKE_MCSRR0], env->spr[SPR_BOOKE_MCSRR1]); } #endif /* CONFIG_TCG */ #endif /* !defined(CONFIG_USER_ONLY) */ #ifdef CONFIG_TCG void helper_tw(CPUPPCState *env, target_ulong arg1, target_ulong arg2, uint32_t flags) { if (!likely(!(((int32_t)arg1 < (int32_t)arg2 && (flags & 0x10)) || ((int32_t)arg1 > (int32_t)arg2 && (flags & 0x08)) || ((int32_t)arg1 == (int32_t)arg2 && (flags & 0x04)) || ((uint32_t)arg1 < (uint32_t)arg2 && (flags & 0x02)) || ((uint32_t)arg1 > (uint32_t)arg2 && (flags & 0x01))))) { raise_exception_err_ra(env, POWERPC_EXCP_PROGRAM, POWERPC_EXCP_TRAP, GETPC()); } } #if defined(TARGET_PPC64) void helper_td(CPUPPCState *env, target_ulong arg1, target_ulong arg2, uint32_t flags) { if (!likely(!(((int64_t)arg1 < (int64_t)arg2 && (flags & 0x10)) || ((int64_t)arg1 > (int64_t)arg2 && (flags & 0x08)) || ((int64_t)arg1 == (int64_t)arg2 && (flags & 0x04)) || ((uint64_t)arg1 < (uint64_t)arg2 && (flags & 0x02)) || ((uint64_t)arg1 > (uint64_t)arg2 && (flags & 0x01))))) { raise_exception_err_ra(env, POWERPC_EXCP_PROGRAM, POWERPC_EXCP_TRAP, GETPC()); } } #endif #endif #if !defined(CONFIG_USER_ONLY) /*****************************************************************************/ /* PowerPC 601 specific instructions (POWER bridge) */ #ifdef CONFIG_TCG void helper_rfsvc(CPUPPCState *env) { do_rfi(env, env->lr, env->ctr & 0x0000FFFF); } /* Embedded.Processor Control */ static int dbell2irq(target_ulong rb) { int msg = rb & DBELL_TYPE_MASK; int irq = -1; switch (msg) { case DBELL_TYPE_DBELL: irq = PPC_INTERRUPT_DOORBELL; break; case DBELL_TYPE_DBELL_CRIT: irq = PPC_INTERRUPT_CDOORBELL; break; case DBELL_TYPE_G_DBELL: case DBELL_TYPE_G_DBELL_CRIT: case DBELL_TYPE_G_DBELL_MC: /* XXX implement */ default: break; } return irq; } void helper_msgclr(CPUPPCState *env, target_ulong rb) { int irq = dbell2irq(rb); if (irq < 0) { return; } env->pending_interrupts &= ~(1 << irq); } void helper_msgsnd(target_ulong rb) { int irq = dbell2irq(rb); int pir = rb & DBELL_PIRTAG_MASK; CPUState *cs; if (irq < 0) { return; } qemu_mutex_lock_iothread(); CPU_FOREACH(cs) { PowerPCCPU *cpu = POWERPC_CPU(cs); CPUPPCState *cenv = &cpu->env; if ((rb & DBELL_BRDCAST) || (cenv->spr[SPR_BOOKE_PIR] == pir)) { cenv->pending_interrupts |= 1 << irq; cpu_interrupt(cs, CPU_INTERRUPT_HARD); } } qemu_mutex_unlock_iothread(); } /* Server Processor Control */ static bool dbell_type_server(target_ulong rb) { /* * A Directed Hypervisor Doorbell message is sent only if the * message type is 5. All other types are reserved and the * instruction is a no-op */ return (rb & DBELL_TYPE_MASK) == DBELL_TYPE_DBELL_SERVER; } void helper_book3s_msgclr(CPUPPCState *env, target_ulong rb) { if (!dbell_type_server(rb)) { return; } env->pending_interrupts &= ~(1 << PPC_INTERRUPT_HDOORBELL); } static void book3s_msgsnd_common(int pir, int irq) { CPUState *cs; qemu_mutex_lock_iothread(); CPU_FOREACH(cs) { PowerPCCPU *cpu = POWERPC_CPU(cs); CPUPPCState *cenv = &cpu->env; /* TODO: broadcast message to all threads of the same processor */ if (cenv->spr_cb[SPR_PIR].default_value == pir) { cenv->pending_interrupts |= 1 << irq; cpu_interrupt(cs, CPU_INTERRUPT_HARD); } } qemu_mutex_unlock_iothread(); } void helper_book3s_msgsnd(target_ulong rb) { int pir = rb & DBELL_PROCIDTAG_MASK; if (!dbell_type_server(rb)) { return; } book3s_msgsnd_common(pir, PPC_INTERRUPT_HDOORBELL); } #if defined(TARGET_PPC64) void helper_book3s_msgclrp(CPUPPCState *env, target_ulong rb) { helper_hfscr_facility_check(env, HFSCR_MSGP, "msgclrp", HFSCR_IC_MSGP); if (!dbell_type_server(rb)) { return; } env->pending_interrupts &= ~(1 << PPC_INTERRUPT_DOORBELL); } /* * sends a message to other threads that are on the same * multi-threaded processor */ void helper_book3s_msgsndp(CPUPPCState *env, target_ulong rb) { int pir = env->spr_cb[SPR_PIR].default_value; helper_hfscr_facility_check(env, HFSCR_MSGP, "msgsndp", HFSCR_IC_MSGP); if (!dbell_type_server(rb)) { return; } /* TODO: TCG supports only one thread */ book3s_msgsnd_common(pir, PPC_INTERRUPT_DOORBELL); } #endif /* TARGET_PPC64 */ void ppc_cpu_do_unaligned_access(CPUState *cs, vaddr vaddr, MMUAccessType access_type, int mmu_idx, uintptr_t retaddr) { CPUPPCState *env = cs->env_ptr; uint32_t insn; /* Restore state and reload the insn we executed, for filling in DSISR. */ cpu_restore_state(cs, retaddr, true); insn = cpu_ldl_code(env, env->nip); switch (env->mmu_model) { case POWERPC_MMU_SOFT_4xx: env->spr[SPR_40x_DEAR] = vaddr; break; case POWERPC_MMU_BOOKE: case POWERPC_MMU_BOOKE206: env->spr[SPR_BOOKE_DEAR] = vaddr; break; default: env->spr[SPR_DAR] = vaddr; break; } cs->exception_index = POWERPC_EXCP_ALIGN; env->error_code = insn & 0x03FF0000; cpu_loop_exit(cs); } #endif /* CONFIG_TCG */ #endif /* !CONFIG_USER_ONLY */