linux-user, arm: add syscall table generation support
[qemu.git] / hw / i386 / fw_cfg.c
1 /*
2 * QEMU fw_cfg helpers (X86 specific)
3 *
4 * Copyright (c) 2019 Red Hat, Inc.
5 *
6 * Author:
7 * Philippe Mathieu-Daudé <philmd@redhat.com>
8 *
9 * SPDX-License-Identifier: GPL-2.0-or-later
10 *
11 * This work is licensed under the terms of the GNU GPL, version 2 or later.
12 * See the COPYING file in the top-level directory.
13 */
14
15 #include "qemu/osdep.h"
16 #include "sysemu/numa.h"
17 #include "hw/acpi/acpi.h"
18 #include "hw/firmware/smbios.h"
19 #include "hw/i386/fw_cfg.h"
20 #include "hw/timer/hpet.h"
21 #include "hw/nvram/fw_cfg.h"
22 #include "e820_memory_layout.h"
23 #include "kvm_i386.h"
24 #include "config-devices.h"
25
26 struct hpet_fw_config hpet_cfg = {.count = UINT8_MAX};
27
28 const char *fw_cfg_arch_key_name(uint16_t key)
29 {
30 static const struct {
31 uint16_t key;
32 const char *name;
33 } fw_cfg_arch_wellknown_keys[] = {
34 {FW_CFG_ACPI_TABLES, "acpi_tables"},
35 {FW_CFG_SMBIOS_ENTRIES, "smbios_entries"},
36 {FW_CFG_IRQ0_OVERRIDE, "irq0_override"},
37 {FW_CFG_E820_TABLE, "e820_table"},
38 {FW_CFG_HPET, "hpet"},
39 };
40
41 for (size_t i = 0; i < ARRAY_SIZE(fw_cfg_arch_wellknown_keys); i++) {
42 if (fw_cfg_arch_wellknown_keys[i].key == key) {
43 return fw_cfg_arch_wellknown_keys[i].name;
44 }
45 }
46 return NULL;
47 }
48
49 void fw_cfg_build_smbios(MachineState *ms, FWCfgState *fw_cfg)
50 {
51 #ifdef CONFIG_SMBIOS
52 uint8_t *smbios_tables, *smbios_anchor;
53 size_t smbios_tables_len, smbios_anchor_len;
54 struct smbios_phys_mem_area *mem_array;
55 unsigned i, array_count;
56 X86CPU *cpu = X86_CPU(ms->possible_cpus->cpus[0].cpu);
57
58 /* tell smbios about cpuid version and features */
59 smbios_set_cpuid(cpu->env.cpuid_version, cpu->env.features[FEAT_1_EDX]);
60
61 smbios_tables = smbios_get_table_legacy(ms, &smbios_tables_len);
62 if (smbios_tables) {
63 fw_cfg_add_bytes(fw_cfg, FW_CFG_SMBIOS_ENTRIES,
64 smbios_tables, smbios_tables_len);
65 }
66
67 /* build the array of physical mem area from e820 table */
68 mem_array = g_malloc0(sizeof(*mem_array) * e820_get_num_entries());
69 for (i = 0, array_count = 0; i < e820_get_num_entries(); i++) {
70 uint64_t addr, len;
71
72 if (e820_get_entry(i, E820_RAM, &addr, &len)) {
73 mem_array[array_count].address = addr;
74 mem_array[array_count].length = len;
75 array_count++;
76 }
77 }
78 smbios_get_tables(ms, mem_array, array_count,
79 &smbios_tables, &smbios_tables_len,
80 &smbios_anchor, &smbios_anchor_len);
81 g_free(mem_array);
82
83 if (smbios_anchor) {
84 fw_cfg_add_file(fw_cfg, "etc/smbios/smbios-tables",
85 smbios_tables, smbios_tables_len);
86 fw_cfg_add_file(fw_cfg, "etc/smbios/smbios-anchor",
87 smbios_anchor, smbios_anchor_len);
88 }
89 #endif
90 }
91
92 FWCfgState *fw_cfg_arch_create(MachineState *ms,
93 uint16_t boot_cpus,
94 uint16_t apic_id_limit)
95 {
96 FWCfgState *fw_cfg;
97 uint64_t *numa_fw_cfg;
98 int i;
99 MachineClass *mc = MACHINE_GET_CLASS(ms);
100 const CPUArchIdList *cpus = mc->possible_cpu_arch_ids(ms);
101 int nb_numa_nodes = ms->numa_state->num_nodes;
102
103 fw_cfg = fw_cfg_init_io_dma(FW_CFG_IO_BASE, FW_CFG_IO_BASE + 4,
104 &address_space_memory);
105 fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, boot_cpus);
106
107 /* FW_CFG_MAX_CPUS is a bit confusing/problematic on x86:
108 *
109 * For machine types prior to 1.8, SeaBIOS needs FW_CFG_MAX_CPUS for
110 * building MPTable, ACPI MADT, ACPI CPU hotplug and ACPI SRAT table,
111 * that tables are based on xAPIC ID and QEMU<->SeaBIOS interface
112 * for CPU hotplug also uses APIC ID and not "CPU index".
113 * This means that FW_CFG_MAX_CPUS is not the "maximum number of CPUs",
114 * but the "limit to the APIC ID values SeaBIOS may see".
115 *
116 * So for compatibility reasons with old BIOSes we are stuck with
117 * "etc/max-cpus" actually being apic_id_limit
118 */
119 fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, apic_id_limit);
120 fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size);
121 #ifdef CONFIG_ACPI
122 fw_cfg_add_bytes(fw_cfg, FW_CFG_ACPI_TABLES,
123 acpi_tables, acpi_tables_len);
124 #endif
125 fw_cfg_add_i32(fw_cfg, FW_CFG_IRQ0_OVERRIDE, kvm_allows_irq0_override());
126
127 fw_cfg_add_bytes(fw_cfg, FW_CFG_E820_TABLE,
128 &e820_reserve, sizeof(e820_reserve));
129 fw_cfg_add_file(fw_cfg, "etc/e820", e820_table,
130 sizeof(struct e820_entry) * e820_get_num_entries());
131
132 fw_cfg_add_bytes(fw_cfg, FW_CFG_HPET, &hpet_cfg, sizeof(hpet_cfg));
133 /* allocate memory for the NUMA channel: one (64bit) word for the number
134 * of nodes, one word for each VCPU->node and one word for each node to
135 * hold the amount of memory.
136 */
137 numa_fw_cfg = g_new0(uint64_t, 1 + apic_id_limit + nb_numa_nodes);
138 numa_fw_cfg[0] = cpu_to_le64(nb_numa_nodes);
139 for (i = 0; i < cpus->len; i++) {
140 unsigned int apic_id = cpus->cpus[i].arch_id;
141 assert(apic_id < apic_id_limit);
142 numa_fw_cfg[apic_id + 1] = cpu_to_le64(cpus->cpus[i].props.node_id);
143 }
144 for (i = 0; i < nb_numa_nodes; i++) {
145 numa_fw_cfg[apic_id_limit + 1 + i] =
146 cpu_to_le64(ms->numa_state->nodes[i].node_mem);
147 }
148 fw_cfg_add_bytes(fw_cfg, FW_CFG_NUMA, numa_fw_cfg,
149 (1 + apic_id_limit + nb_numa_nodes) *
150 sizeof(*numa_fw_cfg));
151
152 return fw_cfg;
153 }
154
155 void fw_cfg_build_feature_control(MachineState *ms, FWCfgState *fw_cfg)
156 {
157 X86CPU *cpu = X86_CPU(ms->possible_cpus->cpus[0].cpu);
158 CPUX86State *env = &cpu->env;
159 uint32_t unused, ecx, edx;
160 uint64_t feature_control_bits = 0;
161 uint64_t *val;
162
163 cpu_x86_cpuid(env, 1, 0, &unused, &unused, &ecx, &edx);
164 if (ecx & CPUID_EXT_VMX) {
165 feature_control_bits |= FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX;
166 }
167
168 if ((edx & (CPUID_EXT2_MCE | CPUID_EXT2_MCA)) ==
169 (CPUID_EXT2_MCE | CPUID_EXT2_MCA) &&
170 (env->mcg_cap & MCG_LMCE_P)) {
171 feature_control_bits |= FEATURE_CONTROL_LMCE;
172 }
173
174 if (!feature_control_bits) {
175 return;
176 }
177
178 val = g_malloc(sizeof(*val));
179 *val = cpu_to_le64(feature_control_bits | FEATURE_CONTROL_LOCKED);
180 fw_cfg_add_file(fw_cfg, "etc/msr_feature_control", val, sizeof(*val));
181 }