target/s390x: move sysemu-only code out to cpu-sysemu.c

move sysemu-only code out to cpu-sysemu.c

Signed-off-by: Claudio Fontana <cfontana@suse.de>
Signed-off-by: Cho, Yu-Chen <acho@suse.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20210707105324.23400-9-acho@suse.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>

1 files changed, 309 insertions, 0 deletions

diff --git a/target/s390x/cpu-sysemu.c b/target/s390x/cpu-sysemu.c
new file mode 100644
index 0000000000..16e5301084
--- /dev/null
+++ b/target/s390x/cpu-sysemu.c
@@ -0,0 +1,309 @@
+/*
+ * 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_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);
+    }
+}