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 #include "hvf-i386.h"
  19
  20 static void hvf_cpu_max_instance_init(X86CPU *cpu)
  21 {
  22     CPUX86State *env = &cpu->env;
  23
  24     host_cpu_max_instance_init(cpu);
  25
  26     env->cpuid_min_level =
  27         hvf_get_supported_cpuid(0x0, 0, R_EAX);
  28     env->cpuid_min_xlevel =
  29         hvf_get_supported_cpuid(0x80000000, 0, R_EAX);
  30     env->cpuid_min_xlevel2 =
  31         hvf_get_supported_cpuid(0xC0000000, 0, R_EAX);
  32 }
  33
  34 static void hvf_cpu_xsave_init(void)
  35 {
  36     static bool first = true;
  37     int i;
  38
  39     if (!first) {
  40         return;
  41     }
  42     first = false;
  43
  44     /* x87 and SSE states are in the legacy region of the XSAVE area. */
  45     x86_ext_save_areas[XSTATE_FP_BIT].offset = 0;
  46     x86_ext_save_areas[XSTATE_SSE_BIT].offset = 0;
  47
  48     for (i = XSTATE_SSE_BIT + 1; i < XSAVE_STATE_AREA_COUNT; i++) {
  49         ExtSaveArea *esa = &x86_ext_save_areas[i];
  50
  51         if (esa->size) {
  52             int sz = hvf_get_supported_cpuid(0xd, i, R_EAX);
  53             if (sz != 0) {
  54                 assert(esa->size == sz);
  55                 esa->offset = hvf_get_supported_cpuid(0xd, i, R_EBX);
  56             }
  57         }
  58     }
  59 }
  60
  61 static void hvf_cpu_instance_init(CPUState *cs)
  62 {
  63     X86CPU *cpu = X86_CPU(cs);
  64
  65     host_cpu_instance_init(cpu);
  66
  67     /* Special cases not set in the X86CPUDefinition structs: */
  68     /* TODO: in-kernel irqchip for hvf */
  69
  70     if (cpu->max_features) {
  71         hvf_cpu_max_instance_init(cpu);
  72     }
  73
  74     hvf_cpu_xsave_init();
  75 }
  76
  77 static void hvf_cpu_accel_class_init(ObjectClass *oc, void *data)
  78 {
  79     AccelCPUClass *acc = ACCEL_CPU_CLASS(oc);
  80
  81     acc->cpu_target_realize = host_cpu_realizefn;
  82     acc->cpu_instance_init = hvf_cpu_instance_init;
  83 }
  84
  85 static const TypeInfo hvf_cpu_accel_type_info = {
  86     .name = ACCEL_CPU_NAME("hvf"),
  87
  88     .parent = TYPE_ACCEL_CPU,
  89     .class_init = hvf_cpu_accel_class_init,
  90     .abstract = true,
  91 };
  92
  93 static void hvf_cpu_accel_register_types(void)
  94 {
  95     type_register_static(&hvf_cpu_accel_type_info);
  96 }
  97
  98 type_init(hvf_cpu_accel_register_types);