xref: /openbmc/qemu/target/i386/hvf/hvf-cpu.c (revision c6e1b31b)
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);
99