LXR qemu/target/i386/hvf/hvf-cpu.c

   1/*
   2 * x86 HVF CPU type initialization
   3 *
   4 * Copyright 2021 SUSE LLC
   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 "cpu.h"
  12#include "host-cpu.h"
  13#include "qapi/error.h"
  14#include "sysemu/sysemu.h"
  15#include "hw/boards.h"
  16#include "sysemu/hvf.h"
  17#include "hw/core/accel-cpu.h"
  18
  19static void hvf_cpu_max_instance_init(X86CPU *cpu)
  20{
  21    CPUX86State *env = &cpu->env;
  22
  23    host_cpu_max_instance_init(cpu);
  24
  25    env->cpuid_min_level =
  26        hvf_get_supported_cpuid(0x0, 0, R_EAX);
  27    env->cpuid_min_xlevel =
  28        hvf_get_supported_cpuid(0x80000000, 0, R_EAX);
  29    env->cpuid_min_xlevel2 =
  30        hvf_get_supported_cpuid(0xC0000000, 0, R_EAX);
  31}
  32
  33static void hvf_cpu_xsave_init(void)
  34{
  35    static bool first = true;
  36    int i;
  37
  38    if (!first) {
  39        return;
  40    }
  41    first = false;
  42
  43    /* x87 and SSE states are in the legacy region of the XSAVE area. */
  44    x86_ext_save_areas[XSTATE_FP_BIT].offset = 0;
  45    x86_ext_save_areas[XSTATE_SSE_BIT].offset = 0;
  46
  47    for (i = XSTATE_SSE_BIT + 1; i < XSAVE_STATE_AREA_COUNT; i++) {
  48        ExtSaveArea *esa = &x86_ext_save_areas[i];
  49
  50        if (esa->size) {
  51            int sz = hvf_get_supported_cpuid(0xd, i, R_EAX);
  52            if (sz != 0) {
  53                assert(esa->size == sz);
  54                esa->offset = hvf_get_supported_cpuid(0xd, i, R_EBX);
  55            }
  56        }
  57    }
  58}
  59
  60static void hvf_cpu_instance_init(CPUState *cs)
  61{
  62    X86CPU *cpu = X86_CPU(cs);
  63
  64    host_cpu_instance_init(cpu);
  65
  66    /* Special cases not set in the X86CPUDefinition structs: */
  67    /* TODO: in-kernel irqchip for hvf */
  68
  69    if (cpu->max_features) {
  70        hvf_cpu_max_instance_init(cpu);
  71    }
  72
  73    hvf_cpu_xsave_init();
  74}
  75
  76static void hvf_cpu_accel_class_init(ObjectClass *oc, void *data)
  77{
  78    AccelCPUClass *acc = ACCEL_CPU_CLASS(oc);
  79
  80    acc->cpu_realizefn = host_cpu_realizefn;
  81    acc->cpu_instance_init = hvf_cpu_instance_init;
  82}
  83
  84static const TypeInfo hvf_cpu_accel_type_info = {
  85    .name = ACCEL_CPU_NAME("hvf"),
  86
  87    .parent = TYPE_ACCEL_CPU,
  88    .class_init = hvf_cpu_accel_class_init,
  89    .abstract = true,
  90};
  91
  92static void hvf_cpu_accel_register_types(void)
  93{
  94    type_register_static(&hvf_cpu_accel_type_info);
  95}
  96
  97type_init(hvf_cpu_accel_register_types);
  98