cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

core.c (2854B)

      1/*
      2 * CPU core abstract device
      3 *
      4 * Copyright (C) 2016 Bharata B Rao <bharata@linux.vnet.ibm.com>
      5 *
      6 * This work is licensed under the terms of the GNU GPL, version 2 or later.
      7 * See the COPYING file in the top-level directory.
      8 */
      9
     10#include "qemu/osdep.h"
     11#include "hw/cpu/core.h"
     12#include "qapi/visitor.h"
     13#include "qemu/module.h"
     14#include "qapi/error.h"
     15#include "sysemu/cpus.h"
     16#include "hw/boards.h"
     17
     18static void core_prop_get_core_id(Object *obj, Visitor *v, const char *name,
     19                                  void *opaque, Error **errp)
     20{
     21    CPUCore *core = CPU_CORE(obj);
     22    int64_t value = core->core_id;
     23
     24    visit_type_int(v, name, &value, errp);
     25}
     26
     27static void core_prop_set_core_id(Object *obj, Visitor *v, const char *name,
     28                                  void *opaque, Error **errp)
     29{
     30    CPUCore *core = CPU_CORE(obj);
     31    int64_t value;
     32
     33    if (!visit_type_int(v, name, &value, errp)) {
     34        return;
     35    }
     36
     37    if (value < 0) {
     38        error_setg(errp, "Invalid core id %"PRId64, value);
     39        return;
     40    }
     41
     42    core->core_id = value;
     43}
     44
     45static void core_prop_get_nr_threads(Object *obj, Visitor *v, const char *name,
     46                                     void *opaque, Error **errp)
     47{
     48    CPUCore *core = CPU_CORE(obj);
     49    int64_t value = core->nr_threads;
     50
     51    visit_type_int(v, name, &value, errp);
     52}
     53
     54static void core_prop_set_nr_threads(Object *obj, Visitor *v, const char *name,
     55                                     void *opaque, Error **errp)
     56{
     57    CPUCore *core = CPU_CORE(obj);
     58    int64_t value;
     59
     60    if (!visit_type_int(v, name, &value, errp)) {
     61        return;
     62    }
     63
     64    core->nr_threads = value;
     65}
     66
     67static void cpu_core_instance_init(Object *obj)
     68{
     69    CPUCore *core = CPU_CORE(obj);
     70
     71    /*
     72     * Only '-device something-cpu-core,help' can get us there before
     73     * the machine has been created. We don't care to set nr_threads
     74     * in this case since it isn't used afterwards.
     75     */
     76    if (current_machine) {
     77        core->nr_threads = current_machine->smp.threads;
     78    }
     79}
     80
     81static void cpu_core_class_init(ObjectClass *oc, void *data)
     82{
     83    DeviceClass *dc = DEVICE_CLASS(oc);
     84
     85    set_bit(DEVICE_CATEGORY_CPU, dc->categories);
     86    object_class_property_add(oc, "core-id", "int", core_prop_get_core_id,
     87                              core_prop_set_core_id, NULL, NULL);
     88    object_class_property_add(oc, "nr-threads", "int", core_prop_get_nr_threads,
     89                              core_prop_set_nr_threads, NULL, NULL);
     90}
     91
     92static const TypeInfo cpu_core_type_info = {
     93    .name = TYPE_CPU_CORE,
     94    .parent = TYPE_DEVICE,
     95    .abstract = true,
     96    .class_init = cpu_core_class_init,
     97    .instance_size = sizeof(CPUCore),
     98    .instance_init = cpu_core_instance_init,
     99};
    100
    101static void cpu_core_register_types(void)
    102{
    103    type_register_static(&cpu_core_type_info);
    104}
    105
    106type_init(cpu_core_register_types)