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hvf-cpu.c (2337B)

      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);