/* * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator * * Hypercall based emulated RTAS * * Copyright (c) 2010-2011 David Gibson, IBM Corporation. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * */ #include "qemu/osdep.h" #include "cpu.h" #include "qemu/log.h" #include "qemu/error-report.h" #include "sysemu/sysemu.h" #include "sysemu/device_tree.h" #include "sysemu/cpus.h" #include "sysemu/hw_accel.h" #include "sysemu/runstate.h" #include "kvm_ppc.h" #include "hw/ppc/spapr.h" #include "hw/ppc/spapr_vio.h" #include "hw/ppc/spapr_rtas.h" #include "hw/ppc/spapr_cpu_core.h" #include "hw/ppc/ppc.h" #include "hw/boards.h" #include #include "hw/ppc/spapr_drc.h" #include "qemu/cutils.h" #include "trace.h" #include "hw/ppc/fdt.h" #include "target/ppc/mmu-hash64.h" #include "target/ppc/mmu-book3s-v3.h" #include "migration/blocker.h" #include "helper_regs.h" static void rtas_display_character(PowerPCCPU *cpu, SpaprMachineState *spapr, uint32_t token, uint32_t nargs, target_ulong args, uint32_t nret, target_ulong rets) { uint8_t c = rtas_ld(args, 0); SpaprVioDevice *sdev = vty_lookup(spapr, 0); if (!sdev) { rtas_st(rets, 0, RTAS_OUT_HW_ERROR); } else { vty_putchars(sdev, &c, sizeof(c)); rtas_st(rets, 0, RTAS_OUT_SUCCESS); } } static void rtas_power_off(PowerPCCPU *cpu, SpaprMachineState *spapr, uint32_t token, uint32_t nargs, target_ulong args, uint32_t nret, target_ulong rets) { if (nargs != 2 || nret != 1) { rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); return; } qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); cpu_stop_current(); rtas_st(rets, 0, RTAS_OUT_SUCCESS); } static void rtas_system_reboot(PowerPCCPU *cpu, SpaprMachineState *spapr, uint32_t token, uint32_t nargs, target_ulong args, uint32_t nret, target_ulong rets) { if (nargs != 0 || nret != 1) { rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); return; } qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); rtas_st(rets, 0, RTAS_OUT_SUCCESS); } static void rtas_query_cpu_stopped_state(PowerPCCPU *cpu_, SpaprMachineState *spapr, uint32_t token, uint32_t nargs, target_ulong args, uint32_t nret, target_ulong rets) { target_ulong id; PowerPCCPU *cpu; if (nargs != 1 || nret != 2) { rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); return; } id = rtas_ld(args, 0); cpu = spapr_find_cpu(id); if (cpu != NULL) { if (CPU(cpu)->halted) { rtas_st(rets, 1, 0); } else { rtas_st(rets, 1, 2); } rtas_st(rets, 0, RTAS_OUT_SUCCESS); return; } /* Didn't find a matching cpu */ rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); } static void rtas_start_cpu(PowerPCCPU *callcpu, SpaprMachineState *spapr, uint32_t token, uint32_t nargs, target_ulong args, uint32_t nret, target_ulong rets) { target_ulong id, start, r3; PowerPCCPU *newcpu; CPUPPCState *env; PowerPCCPUClass *pcc; target_ulong lpcr; if (nargs != 3 || nret != 1) { rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); return; } id = rtas_ld(args, 0); start = rtas_ld(args, 1); r3 = rtas_ld(args, 2); newcpu = spapr_find_cpu(id); if (!newcpu) { /* Didn't find a matching cpu */ rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); return; } env = &newcpu->env; pcc = POWERPC_CPU_GET_CLASS(newcpu); if (!CPU(newcpu)->halted) { rtas_st(rets, 0, RTAS_OUT_HW_ERROR); return; } cpu_synchronize_state(CPU(newcpu)); env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME); hreg_compute_hflags(env); /* Enable Power-saving mode Exit Cause exceptions for the new CPU */ lpcr = env->spr[SPR_LPCR]; if (!pcc->interrupts_big_endian(callcpu)) { lpcr |= LPCR_ILE; } if (env->mmu_model == POWERPC_MMU_3_00) { /* * New cpus are expected to start in the same radix/hash mode * as the existing CPUs */ if (ppc64_v3_radix(callcpu)) { lpcr |= LPCR_UPRT | LPCR_GTSE | LPCR_HR; } else { lpcr &= ~(LPCR_UPRT | LPCR_GTSE | LPCR_HR); } env->spr[SPR_PSSCR] &= ~PSSCR_EC; } ppc_store_lpcr(newcpu, lpcr); /* * Set the timebase offset of the new CPU to that of the invoking * CPU. This helps hotplugged CPU to have the correct timebase * offset. */ newcpu->env.tb_env->tb_offset = callcpu->env.tb_env->tb_offset; spapr_cpu_set_entry_state(newcpu, start, 0, r3, 0); qemu_cpu_kick(CPU(newcpu)); rtas_st(rets, 0, RTAS_OUT_SUCCESS); } static void rtas_stop_self(PowerPCCPU *cpu, SpaprMachineState *spapr, uint32_t token, uint32_t nargs, target_ulong args, uint32_t nret, target_ulong rets) { CPUState *cs = CPU(cpu); CPUPPCState *env = &cpu->env; PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu); /* Disable Power-saving mode Exit Cause exceptions for the CPU. * This could deliver an interrupt on a dying CPU and crash the * guest. * For the same reason, set PSSCR_EC. */ ppc_store_lpcr(cpu, env->spr[SPR_LPCR] & ~pcc->lpcr_pm); env->spr[SPR_PSSCR] |= PSSCR_EC; cs->halted = 1; kvmppc_set_reg_ppc_online(cpu, 0); qemu_cpu_kick(cs); } static void rtas_ibm_suspend_me(PowerPCCPU *cpu, SpaprMachineState *spapr, uint32_t token, uint32_t nargs, target_ulong args, uint32_t nret, target_ulong rets) { CPUState *cs; if (nargs != 0 || nret != 1) { rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); return; } CPU_FOREACH(cs) { PowerPCCPU *c = POWERPC_CPU(cs); CPUPPCState *e = &c->env; if (c == cpu) { continue; } /* See h_join */ if (!cs->halted || (e->msr & (1ULL << MSR_EE))) { rtas_st(rets, 0, H_MULTI_THREADS_ACTIVE); return; } } qemu_system_suspend_request(); rtas_st(rets, 0, RTAS_OUT_SUCCESS); } static inline int sysparm_st(target_ulong addr, target_ulong len, const void *val, uint16_t vallen) { hwaddr phys = ppc64_phys_to_real(addr); if (len < 2) { return RTAS_OUT_SYSPARM_PARAM_ERROR; } stw_be_phys(&address_space_memory, phys, vallen); cpu_physical_memory_write(phys + 2, val, MIN(len - 2, vallen)); return RTAS_OUT_SUCCESS; } static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu, SpaprMachineState *spapr, uint32_t token, uint32_t nargs, target_ulong args, uint32_t nret, target_ulong rets) { PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu); MachineState *ms = MACHINE(spapr); target_ulong parameter = rtas_ld(args, 0); target_ulong buffer = rtas_ld(args, 1); target_ulong length = rtas_ld(args, 2); target_ulong ret; switch (parameter) { case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS: { char *param_val = g_strdup_printf("MaxEntCap=%d," "DesMem=%" PRIu64 "," "DesProcs=%d," "MaxPlatProcs=%d", ms->smp.max_cpus, ms->ram_size / MiB, ms->smp.cpus, ms->smp.max_cpus); if (pcc->n_host_threads > 0) { char *hostthr_val, *old = param_val; /* * Add HostThrs property. This property is not present in PAPR but * is expected by some guests to communicate the number of physical * host threads per core on the system so that they can scale * information which varies based on the thread configuration. */ hostthr_val = g_strdup_printf(",HostThrs=%d", pcc->n_host_threads); param_val = g_strconcat(param_val, hostthr_val, NULL); g_free(hostthr_val); g_free(old); } ret = sysparm_st(buffer, length, param_val, strlen(param_val) + 1); g_free(param_val); break; } case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE: { uint8_t param_val = DIAGNOSTICS_RUN_MODE_DISABLED; ret = sysparm_st(buffer, length, ¶m_val, sizeof(param_val)); break; } case RTAS_SYSPARM_UUID: ret = sysparm_st(buffer, length, (unsigned char *)&qemu_uuid, (qemu_uuid_set ? 16 : 0)); break; default: ret = RTAS_OUT_NOT_SUPPORTED; } rtas_st(rets, 0, ret); } static void rtas_ibm_set_system_parameter(PowerPCCPU *cpu, SpaprMachineState *spapr, uint32_t token, uint32_t nargs, target_ulong args, uint32_t nret, target_ulong rets) { target_ulong parameter = rtas_ld(args, 0); target_ulong ret = RTAS_OUT_NOT_SUPPORTED; switch (parameter) { case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS: case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE: case RTAS_SYSPARM_UUID: ret = RTAS_OUT_NOT_AUTHORIZED; break; } rtas_st(rets, 0, ret); } static void rtas_ibm_os_term(PowerPCCPU *cpu, SpaprMachineState *spapr, uint32_t token, uint32_t nargs, target_ulong args, uint32_t nret, target_ulong rets) { target_ulong msgaddr = rtas_ld(args, 0); char msg[512]; cpu_physical_memory_read(msgaddr, msg, sizeof(msg) - 1); msg[sizeof(msg) - 1] = 0; error_report("OS terminated: %s", msg); qemu_system_guest_panicked(NULL); rtas_st(rets, 0, RTAS_OUT_SUCCESS); } static void rtas_set_power_level(PowerPCCPU *cpu, SpaprMachineState *spapr, uint32_t token, uint32_t nargs, target_ulong args, uint32_t nret, target_ulong rets) { int32_t power_domain; if (nargs != 2 || nret != 2) { rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); return; } /* we currently only use a single, "live insert" powerdomain for * hotplugged/dlpar'd resources, so the power is always live/full (100) */ power_domain = rtas_ld(args, 0); if (power_domain != -1) { rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED); return; } rtas_st(rets, 0, RTAS_OUT_SUCCESS); rtas_st(rets, 1, 100); } static void rtas_get_power_level(PowerPCCPU *cpu, SpaprMachineState *spapr, uint32_t token, uint32_t nargs, target_ulong args, uint32_t nret, target_ulong rets) { int32_t power_domain; if (nargs != 1 || nret != 2) { rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); return; } /* we currently only use a single, "live insert" powerdomain for * hotplugged/dlpar'd resources, so the power is always live/full (100) */ power_domain = rtas_ld(args, 0); if (power_domain != -1) { rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED); return; } rtas_st(rets, 0, RTAS_OUT_SUCCESS); rtas_st(rets, 1, 100); } static void rtas_ibm_nmi_register(PowerPCCPU *cpu, SpaprMachineState *spapr, uint32_t token, uint32_t nargs, target_ulong args, uint32_t nret, target_ulong rets) { hwaddr rtas_addr; target_ulong sreset_addr, mce_addr; if (spapr_get_cap(spapr, SPAPR_CAP_FWNMI) == SPAPR_CAP_OFF) { rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED); return; } rtas_addr = spapr_get_rtas_addr(); if (!rtas_addr) { rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED); return; } sreset_addr = rtas_ld(args, 0); mce_addr = rtas_ld(args, 1); /* PAPR requires these are in the first 32M of memory and within RMA */ if (sreset_addr >= 32 * MiB || sreset_addr >= spapr->rma_size || mce_addr >= 32 * MiB || mce_addr >= spapr->rma_size) { rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); return; } if (kvm_enabled()) { if (kvmppc_set_fwnmi(cpu) < 0) { rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED); return; } } spapr->fwnmi_system_reset_addr = sreset_addr; spapr->fwnmi_machine_check_addr = mce_addr; rtas_st(rets, 0, RTAS_OUT_SUCCESS); } static void rtas_ibm_nmi_interlock(PowerPCCPU *cpu, SpaprMachineState *spapr, uint32_t token, uint32_t nargs, target_ulong args, uint32_t nret, target_ulong rets) { if (spapr_get_cap(spapr, SPAPR_CAP_FWNMI) == SPAPR_CAP_OFF) { rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED); return; } if (spapr->fwnmi_machine_check_addr == -1) { qemu_log_mask(LOG_GUEST_ERROR, "FWNMI: ibm,nmi-interlock RTAS called with FWNMI not registered.\n"); /* NMI register not called */ rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); return; } if (spapr->fwnmi_machine_check_interlock != cpu->vcpu_id) { /* * The vCPU that hit the NMI should invoke "ibm,nmi-interlock" * This should be PARAM_ERROR, but Linux calls "ibm,nmi-interlock" * for system reset interrupts, despite them not being interlocked. * PowerVM silently ignores this and returns success here. Returning * failure causes Linux to print the error "FWNMI: nmi-interlock * failed: -3", although no other apparent ill effects, this is a * regression for the user when enabling FWNMI. So for now, match * PowerVM. When most Linux clients are fixed, this could be * changed. */ rtas_st(rets, 0, RTAS_OUT_SUCCESS); return; } /* * vCPU issuing "ibm,nmi-interlock" is done with NMI handling, * hence unset fwnmi_machine_check_interlock. */ spapr->fwnmi_machine_check_interlock = -1; qemu_cond_signal(&spapr->fwnmi_machine_check_interlock_cond); rtas_st(rets, 0, RTAS_OUT_SUCCESS); migrate_del_blocker(spapr->fwnmi_migration_blocker); } static struct rtas_call { const char *name; spapr_rtas_fn fn; } rtas_table[RTAS_TOKEN_MAX - RTAS_TOKEN_BASE]; target_ulong spapr_rtas_call(PowerPCCPU *cpu, SpaprMachineState *spapr, uint32_t token, uint32_t nargs, target_ulong args, uint32_t nret, target_ulong rets) { if ((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX)) { struct rtas_call *call = rtas_table + (token - RTAS_TOKEN_BASE); if (call->fn) { call->fn(cpu, spapr, token, nargs, args, nret, rets); return H_SUCCESS; } } /* HACK: Some Linux early debug code uses RTAS display-character, * but assumes the token value is 0xa (which it is on some real * machines) without looking it up in the device tree. This * special case makes this work */ if (token == 0xa) { rtas_display_character(cpu, spapr, 0xa, nargs, args, nret, rets); return H_SUCCESS; } hcall_dprintf("Unknown RTAS token 0x%x\n", token); rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); return H_PARAMETER; } uint64_t qtest_rtas_call(char *cmd, uint32_t nargs, uint64_t args, uint32_t nret, uint64_t rets) { int token; for (token = 0; token < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; token++) { if (strcmp(cmd, rtas_table[token].name) == 0) { SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine()); PowerPCCPU *cpu = POWERPC_CPU(first_cpu); rtas_table[token].fn(cpu, spapr, token + RTAS_TOKEN_BASE, nargs, args, nret, rets); return H_SUCCESS; } } return H_PARAMETER; } void spapr_rtas_register(int token, const char *name, spapr_rtas_fn fn) { assert((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX)); token -= RTAS_TOKEN_BASE; assert(!name || !rtas_table[token].name); rtas_table[token].name = name; rtas_table[token].fn = fn; } void spapr_dt_rtas_tokens(void *fdt, int rtas) { int i; for (i = 0; i < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; i++) { struct rtas_call *call = &rtas_table[i]; if (!call->name) { continue; } _FDT(fdt_setprop_cell(fdt, rtas, call->name, i + RTAS_TOKEN_BASE)); } } hwaddr spapr_get_rtas_addr(void) { SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine()); int rtas_node; const fdt32_t *rtas_data; void *fdt = spapr->fdt_blob; /* fetch rtas addr from fdt */ rtas_node = fdt_path_offset(fdt, "/rtas"); if (rtas_node < 0) { return 0; } rtas_data = fdt_getprop(fdt, rtas_node, "linux,rtas-base", NULL); if (!rtas_data) { return 0; } /* * We assume that the OS called RTAS instantiate-rtas, but some other * OS might call RTAS instantiate-rtas-64 instead. This fine as of now * as SLOF only supports 32-bit variant. */ return (hwaddr)fdt32_to_cpu(*rtas_data); } static void core_rtas_register_types(void) { spapr_rtas_register(RTAS_DISPLAY_CHARACTER, "display-character", rtas_display_character); spapr_rtas_register(RTAS_POWER_OFF, "power-off", rtas_power_off); spapr_rtas_register(RTAS_SYSTEM_REBOOT, "system-reboot", rtas_system_reboot); spapr_rtas_register(RTAS_QUERY_CPU_STOPPED_STATE, "query-cpu-stopped-state", rtas_query_cpu_stopped_state); spapr_rtas_register(RTAS_START_CPU, "start-cpu", rtas_start_cpu); spapr_rtas_register(RTAS_STOP_SELF, "stop-self", rtas_stop_self); spapr_rtas_register(RTAS_IBM_SUSPEND_ME, "ibm,suspend-me", rtas_ibm_suspend_me); spapr_rtas_register(RTAS_IBM_GET_SYSTEM_PARAMETER, "ibm,get-system-parameter", rtas_ibm_get_system_parameter); spapr_rtas_register(RTAS_IBM_SET_SYSTEM_PARAMETER, "ibm,set-system-parameter", rtas_ibm_set_system_parameter); spapr_rtas_register(RTAS_IBM_OS_TERM, "ibm,os-term", rtas_ibm_os_term); spapr_rtas_register(RTAS_SET_POWER_LEVEL, "set-power-level", rtas_set_power_level); spapr_rtas_register(RTAS_GET_POWER_LEVEL, "get-power-level", rtas_get_power_level); spapr_rtas_register(RTAS_IBM_NMI_REGISTER, "ibm,nmi-register", rtas_ibm_nmi_register); spapr_rtas_register(RTAS_IBM_NMI_INTERLOCK, "ibm,nmi-interlock", rtas_ibm_nmi_interlock); } type_init(core_rtas_register_types)