/* * QEMU S/390 CPU - System Emulation-only code * * Copyright (c) 2009 Ulrich Hecht * Copyright (c) 2011 Alexander Graf * Copyright (c) 2012 SUSE LINUX Products GmbH * Copyright (c) 2012 IBM Corp. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program 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 * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include "qemu/osdep.h" #include "qapi/error.h" #include "cpu.h" #include "s390x-internal.h" #include "kvm/kvm_s390x.h" #include "sysemu/kvm.h" #include "sysemu/reset.h" #include "qemu/timer.h" #include "trace.h" #include "qapi/qapi-visit-run-state.h" #include "sysemu/hw_accel.h" #include "hw/s390x/pv.h" #include "hw/boards.h" #include "sysemu/arch_init.h" #include "sysemu/sysemu.h" #include "sysemu/tcg.h" #include "hw/core/sysemu-cpu-ops.h" /* S390CPUClass::load_normal() */ static void s390_cpu_load_normal(CPUState *s) { S390CPU *cpu = S390_CPU(s); uint64_t spsw; if (!s390_is_pv()) { spsw = ldq_phys(s->as, 0); cpu->env.psw.mask = spsw & PSW_MASK_SHORT_CTRL; /* * Invert short psw indication, so SIE will report a specification * exception if it was not set. */ cpu->env.psw.mask ^= PSW_MASK_SHORTPSW; cpu->env.psw.addr = spsw & PSW_MASK_SHORT_ADDR; } else { /* * Firmware requires us to set the load state before we set * the cpu to operating on protected guests. */ s390_cpu_set_state(S390_CPU_STATE_LOAD, cpu); } s390_cpu_set_state(S390_CPU_STATE_OPERATING, cpu); } void s390_cpu_machine_reset_cb(void *opaque) { S390CPU *cpu = opaque; run_on_cpu(CPU(cpu), s390_do_cpu_full_reset, RUN_ON_CPU_NULL); } static GuestPanicInformation *s390_cpu_get_crash_info(CPUState *cs) { GuestPanicInformation *panic_info; S390CPU *cpu = S390_CPU(cs); cpu_synchronize_state(cs); panic_info = g_malloc0(sizeof(GuestPanicInformation)); panic_info->type = GUEST_PANIC_INFORMATION_TYPE_S390; panic_info->u.s390.core = cpu->env.core_id; panic_info->u.s390.psw_mask = cpu->env.psw.mask; panic_info->u.s390.psw_addr = cpu->env.psw.addr; panic_info->u.s390.reason = cpu->env.crash_reason; return panic_info; } static void s390_cpu_get_crash_info_qom(Object *obj, Visitor *v, const char *name, void *opaque, Error **errp) { CPUState *cs = CPU(obj); GuestPanicInformation *panic_info; if (!cs->crash_occurred) { error_setg(errp, "No crash occurred"); return; } panic_info = s390_cpu_get_crash_info(cs); visit_type_GuestPanicInformation(v, "crash-information", &panic_info, errp); qapi_free_GuestPanicInformation(panic_info); } void s390_cpu_init_sysemu(Object *obj) { CPUState *cs = CPU(obj); S390CPU *cpu = S390_CPU(obj); cs->start_powered_off = true; object_property_add(obj, "crash-information", "GuestPanicInformation", s390_cpu_get_crash_info_qom, NULL, NULL, NULL); cpu->env.tod_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_tod_timer, cpu); cpu->env.cpu_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, s390x_cpu_timer, cpu); s390_cpu_set_state(S390_CPU_STATE_STOPPED, cpu); } bool s390_cpu_realize_sysemu(DeviceState *dev, Error **errp) { S390CPU *cpu = S390_CPU(dev); MachineState *ms = MACHINE(qdev_get_machine()); unsigned int max_cpus = ms->smp.max_cpus; if (cpu->env.core_id >= max_cpus) { error_setg(errp, "Unable to add CPU with core-id: %" PRIu32 ", maximum core-id: %d", cpu->env.core_id, max_cpus - 1); return false; } if (cpu_exists(cpu->env.core_id)) { error_setg(errp, "Unable to add CPU with core-id: %" PRIu32 ", it already exists", cpu->env.core_id); return false; } /* sync cs->cpu_index and env->core_id. The latter is needed for TCG. */ CPU(cpu)->cpu_index = cpu->env.core_id; return true; } void s390_cpu_finalize(Object *obj) { S390CPU *cpu = S390_CPU(obj); timer_free(cpu->env.tod_timer); timer_free(cpu->env.cpu_timer); qemu_unregister_reset(s390_cpu_machine_reset_cb, cpu); g_free(cpu->irqstate); } static const struct SysemuCPUOps s390_sysemu_ops = { .get_phys_page_debug = s390_cpu_get_phys_page_debug, .get_crash_info = s390_cpu_get_crash_info, .write_elf64_note = s390_cpu_write_elf64_note, .legacy_vmsd = &vmstate_s390_cpu, }; void s390_cpu_class_init_sysemu(CPUClass *cc) { S390CPUClass *scc = S390_CPU_CLASS(cc); scc->load_normal = s390_cpu_load_normal; cc->sysemu_ops = &s390_sysemu_ops; } static bool disabled_wait(CPUState *cpu) { return cpu->halted && !(S390_CPU(cpu)->env.psw.mask & (PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK)); } static unsigned s390_count_running_cpus(void) { CPUState *cpu; int nr_running = 0; CPU_FOREACH(cpu) { uint8_t state = S390_CPU(cpu)->env.cpu_state; if (state == S390_CPU_STATE_OPERATING || state == S390_CPU_STATE_LOAD) { if (!disabled_wait(cpu)) { nr_running++; } } } return nr_running; } unsigned int s390_cpu_halt(S390CPU *cpu) { CPUState *cs = CPU(cpu); trace_cpu_halt(cs->cpu_index); if (!cs->halted) { cs->halted = 1; cs->exception_index = EXCP_HLT; } return s390_count_running_cpus(); } void s390_cpu_unhalt(S390CPU *cpu) { CPUState *cs = CPU(cpu); trace_cpu_unhalt(cs->cpu_index); if (cs->halted) { cs->halted = 0; cs->exception_index = -1; } } unsigned int s390_cpu_set_state(uint8_t cpu_state, S390CPU *cpu) { trace_cpu_set_state(CPU(cpu)->cpu_index, cpu_state); switch (cpu_state) { case S390_CPU_STATE_STOPPED: case S390_CPU_STATE_CHECK_STOP: /* halt the cpu for common infrastructure */ s390_cpu_halt(cpu); break; case S390_CPU_STATE_OPERATING: case S390_CPU_STATE_LOAD: /* * Starting a CPU with a PSW WAIT bit set: * KVM: handles this internally and triggers another WAIT exit. * TCG: will actually try to continue to run. Don't unhalt, will * be done when the CPU actually has work (an interrupt). */ if (!tcg_enabled() || !(cpu->env.psw.mask & PSW_MASK_WAIT)) { s390_cpu_unhalt(cpu); } break; default: error_report("Requested CPU state is not a valid S390 CPU state: %u", cpu_state); exit(1); } if (kvm_enabled() && cpu->env.cpu_state != cpu_state) { kvm_s390_set_cpu_state(cpu, cpu_state); } cpu->env.cpu_state = cpu_state; return s390_count_running_cpus(); } int s390_set_memory_limit(uint64_t new_limit, uint64_t *hw_limit) { if (kvm_enabled()) { return kvm_s390_set_mem_limit(new_limit, hw_limit); } return 0; } void s390_set_max_pagesize(uint64_t pagesize, Error **errp) { if (kvm_enabled()) { kvm_s390_set_max_pagesize(pagesize, errp); } } void s390_cmma_reset(void) { if (kvm_enabled()) { kvm_s390_cmma_reset(); } } int s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch_id, int vq, bool assign) { if (kvm_enabled()) { return kvm_s390_assign_subch_ioeventfd(notifier, sch_id, vq, assign); } else { return 0; } } void s390_crypto_reset(void) { if (kvm_enabled()) { kvm_s390_crypto_reset(); } } void s390_enable_css_support(S390CPU *cpu) { if (kvm_enabled()) { kvm_s390_enable_css_support(cpu); } } void s390_do_cpu_set_diag318(CPUState *cs, run_on_cpu_data arg) { if (kvm_enabled()) { kvm_s390_set_diag318(cs, arg.host_ulong); } }