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Mon, 10 Jan 2022 18:16:00 +0000 (GMT) Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CE51478060; Mon, 10 Jan 2022 18:15:58 +0000 (GMT) Received: from farosas.linux.ibm.com.com (unknown [9.211.79.41]) by b03ledav004.gho.boulder.ibm.com (Postfix) with ESMTP; Mon, 10 Jan 2022 18:15:58 +0000 (GMT) From: Fabiano Rosas To: qemu-devel@nongnu.org Subject: [PATCH 3/8] target/ppc: Introduce powerpc_excp_40x Date: Mon, 10 Jan 2022 15:15:41 -0300 Message-Id: <20220110181546.4131853-4-farosas@linux.ibm.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20220110181546.4131853-1-farosas@linux.ibm.com> References: <20220110181546.4131853-1-farosas@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: _znEmFgWNw3N_ABKI1Y-D2luOQwXs2Ds X-Proofpoint-ORIG-GUID: QJJ-TJ1-rhg8RE0VgzC4PxcA0FkJ_ZZy X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.790,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2022-01-10_07,2022-01-10_02,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 lowpriorityscore=0 spamscore=0 bulkscore=0 suspectscore=0 phishscore=0 impostorscore=0 mlxscore=0 priorityscore=1501 clxscore=1015 mlxlogscore=999 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2110150000 definitions=main-2201100124 Received-SPF: pass client-ip=148.163.158.5; envelope-from=farosas@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: richard.henderson@linaro.org, danielhb413@gmail.com, qemu-ppc@nongnu.org, clg@kaod.org, david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Fabiano Rosas --- I copied powerpc_excp_legacy verbatim in this commit so the next one has a clean diff. We can squash both commits before merging. --- target/ppc/excp_helper.c | 474 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 474 insertions(+) diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c index bc646c67a0..12ab5e1b34 100644 --- a/target/ppc/excp_helper.c +++ b/target/ppc/excp_helper.c @@ -392,6 +392,477 @@ static void powerpc_set_excp_state(PowerPCCPU *cpu, check_tlb_flush(env, false); } +static void powerpc_excp_40x(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_602: + 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); +} + /* * Note that this function should be greatly optimized when called * with a constant excp, from ppc_hw_interrupt @@ -872,6 +1343,9 @@ 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; default: powerpc_excp_legacy(cpu, excp); }