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
  19 static 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
  33 static 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
  60 static 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
  76 static 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
  84 static 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
  92 static void hvf_cpu_accel_register_types(void)
  93 {
  94     type_register_static(&hvf_cpu_accel_type_info);
  95 }
  96
  97 type_init(hvf_cpu_accel_register_types);