/* * 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 "hw/qdev.h" #include "sysemu/device_tree.h" #include "sysemu/cpus.h" #include "sysemu/kvm.h" #include "hw/ppc/spapr.h" #include "hw/ppc/spapr_vio.h" #include "hw/ppc/spapr_rtas.h" #include "hw/ppc/ppc.h" #include "hw/boards.h" #include <libfdt.h> #include "hw/ppc/spapr_drc.h" #include "qemu/cutils.h" #include "trace.h" #include "hw/ppc/fdt.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); VIOsPAPRDevice *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); } /* * Set the timebase offset of the CPU to that of first CPU. * This helps hotplugged CPU to have the correct timebase offset. */ static void spapr_cpu_update_tb_offset(PowerPCCPU *cpu) { PowerPCCPU *fcpu = POWERPC_CPU(first_cpu); cpu->env.tb_env->tb_offset = fcpu->env.tb_env->tb_offset; } static void spapr_cpu_set_endianness(PowerPCCPU *cpu) { PowerPCCPU *fcpu = POWERPC_CPU(first_cpu); PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(fcpu); if (!pcc->interrupts_big_endian(fcpu)) { cpu->env.spr[SPR_LPCR] |= LPCR_ILE; } } static void rtas_start_cpu(PowerPCCPU *cpu_, sPAPRMachineState *spapr, uint32_t token, uint32_t nargs, target_ulong args, uint32_t nret, target_ulong rets) { target_ulong id, start, r3; PowerPCCPU *cpu; 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); cpu = spapr_find_cpu(id); if (cpu != NULL) { CPUState *cs = CPU(cpu); CPUPPCState *env = &cpu->env; PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu); if (!cs->halted) { rtas_st(rets, 0, RTAS_OUT_HW_ERROR); return; } /* This will make sure qemu state is up to date with kvm, and * mark it dirty so our changes get flushed back before the * new cpu enters */ kvm_cpu_synchronize_state(cs); env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME); /* Enable Power-saving mode Exit Cause exceptions for the new CPU */ env->spr[SPR_LPCR] |= pcc->lpcr_pm; env->nip = start; env->gpr[3] = r3; cs->halted = 0; spapr_cpu_set_endianness(cpu); spapr_cpu_update_tb_offset(cpu); qemu_cpu_kick(cs); 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_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); cs->halted = 1; qemu_cpu_kick(cs); /* Disable Power-saving mode Exit Cause exceptions for the CPU. * This could deliver an interrupt on a dying CPU and crash the * guest */ env->spr[SPR_LPCR] &= ~pcc->lpcr_pm; } 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) { 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=%llu," "DesProcs=%d," "MaxPlatProcs=%d", max_cpus, current_machine->ram_size / M_BYTE, smp_cpus, max_cpus); 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) { 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 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(!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)); } } void spapr_load_rtas(sPAPRMachineState *spapr, void *fdt, hwaddr addr) { int rtas_node; int ret; /* Copy RTAS blob into guest RAM */ cpu_physical_memory_write(addr, spapr->rtas_blob, spapr->rtas_size); ret = fdt_add_mem_rsv(fdt, addr, spapr->rtas_size); if (ret < 0) { error_report("Couldn't add RTAS reserve entry: %s", fdt_strerror(ret)); exit(1); } /* Update the device tree with the blob's location */ rtas_node = fdt_path_offset(fdt, "/rtas"); assert(rtas_node >= 0); ret = fdt_setprop_cell(fdt, rtas_node, "linux,rtas-base", addr); if (ret < 0) { error_report("Couldn't add linux,rtas-base property: %s", fdt_strerror(ret)); exit(1); } ret = fdt_setprop_cell(fdt, rtas_node, "linux,rtas-entry", addr); if (ret < 0) { error_report("Couldn't add linux,rtas-entry property: %s", fdt_strerror(ret)); exit(1); } ret = fdt_setprop_cell(fdt, rtas_node, "rtas-size", spapr->rtas_size); if (ret < 0) { error_report("Couldn't add rtas-size property: %s", fdt_strerror(ret)); exit(1); } } 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_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); } type_init(core_rtas_register_types)