hw/arm/bcm2836: Only provide "enabled-cpus" property to multicore SoCs
[qemu.git] / hw / i386 / pc_sysfw.c
1 /*
2 * QEMU PC System Firmware
3 *
4 * Copyright (c) 2003-2004 Fabrice Bellard
5 * Copyright (c) 2011-2012 Intel Corporation
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 * THE SOFTWARE.
24 */
25
26 #include "qemu/osdep.h"
27 #include "qemu-common.h"
28 #include "qapi/error.h"
29 #include "sysemu/block-backend.h"
30 #include "qemu/error-report.h"
31 #include "qemu/option.h"
32 #include "qemu/units.h"
33 #include "hw/sysbus.h"
34 #include "hw/i386/x86.h"
35 #include "hw/i386/pc.h"
36 #include "hw/loader.h"
37 #include "hw/qdev-properties.h"
38 #include "sysemu/sysemu.h"
39 #include "hw/block/flash.h"
40 #include "sysemu/kvm.h"
41
42 /*
43 * We don't have a theoretically justifiable exact lower bound on the base
44 * address of any flash mapping. In practice, the IO-APIC MMIO range is
45 * [0xFEE00000..0xFEE01000] -- see IO_APIC_DEFAULT_ADDRESS --, leaving free
46 * only 18MB-4KB below 4G. For now, restrict the cumulative mapping to 8MB in
47 * size.
48 */
49 #define FLASH_SIZE_LIMIT (8 * MiB)
50
51 #define FLASH_SECTOR_SIZE 4096
52
53 static void pc_isa_bios_init(MemoryRegion *rom_memory,
54 MemoryRegion *flash_mem,
55 int ram_size)
56 {
57 int isa_bios_size;
58 MemoryRegion *isa_bios;
59 uint64_t flash_size;
60 void *flash_ptr, *isa_bios_ptr;
61
62 flash_size = memory_region_size(flash_mem);
63
64 /* map the last 128KB of the BIOS in ISA space */
65 isa_bios_size = MIN(flash_size, 128 * KiB);
66 isa_bios = g_malloc(sizeof(*isa_bios));
67 memory_region_init_ram(isa_bios, NULL, "isa-bios", isa_bios_size,
68 &error_fatal);
69 memory_region_add_subregion_overlap(rom_memory,
70 0x100000 - isa_bios_size,
71 isa_bios,
72 1);
73
74 /* copy ISA rom image from top of flash memory */
75 flash_ptr = memory_region_get_ram_ptr(flash_mem);
76 isa_bios_ptr = memory_region_get_ram_ptr(isa_bios);
77 memcpy(isa_bios_ptr,
78 ((uint8_t*)flash_ptr) + (flash_size - isa_bios_size),
79 isa_bios_size);
80
81 memory_region_set_readonly(isa_bios, true);
82 }
83
84 static PFlashCFI01 *pc_pflash_create(PCMachineState *pcms,
85 const char *name,
86 const char *alias_prop_name)
87 {
88 DeviceState *dev = qdev_new(TYPE_PFLASH_CFI01);
89
90 qdev_prop_set_uint64(dev, "sector-length", FLASH_SECTOR_SIZE);
91 qdev_prop_set_uint8(dev, "width", 1);
92 qdev_prop_set_string(dev, "name", name);
93 object_property_add_child(OBJECT(pcms), name, OBJECT(dev));
94 object_property_add_alias(OBJECT(pcms), alias_prop_name,
95 OBJECT(dev), "drive");
96 /*
97 * The returned reference is tied to the child property and
98 * will be removed with object_unparent.
99 */
100 object_unref(OBJECT(dev));
101 return PFLASH_CFI01(dev);
102 }
103
104 void pc_system_flash_create(PCMachineState *pcms)
105 {
106 PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
107
108 if (pcmc->pci_enabled) {
109 pcms->flash[0] = pc_pflash_create(pcms, "system.flash0",
110 "pflash0");
111 pcms->flash[1] = pc_pflash_create(pcms, "system.flash1",
112 "pflash1");
113 }
114 }
115
116 void pc_system_flash_cleanup_unused(PCMachineState *pcms)
117 {
118 char *prop_name;
119 int i;
120 Object *dev_obj;
121
122 assert(PC_MACHINE_GET_CLASS(pcms)->pci_enabled);
123
124 for (i = 0; i < ARRAY_SIZE(pcms->flash); i++) {
125 dev_obj = OBJECT(pcms->flash[i]);
126 if (!object_property_get_bool(dev_obj, "realized", &error_abort)) {
127 prop_name = g_strdup_printf("pflash%d", i);
128 object_property_del(OBJECT(pcms), prop_name);
129 g_free(prop_name);
130 object_unparent(dev_obj);
131 pcms->flash[i] = NULL;
132 }
133 }
134 }
135
136 /*
137 * Map the pcms->flash[] from 4GiB downward, and realize.
138 * Map them in descending order, i.e. pcms->flash[0] at the top,
139 * without gaps.
140 * Stop at the first pcms->flash[0] lacking a block backend.
141 * Set each flash's size from its block backend. Fatal error if the
142 * size isn't a non-zero multiple of 4KiB, or the total size exceeds
143 * FLASH_SIZE_LIMIT.
144 *
145 * If pcms->flash[0] has a block backend, its memory is passed to
146 * pc_isa_bios_init(). Merging several flash devices for isa-bios is
147 * not supported.
148 */
149 static void pc_system_flash_map(PCMachineState *pcms,
150 MemoryRegion *rom_memory)
151 {
152 hwaddr total_size = 0;
153 int i;
154 BlockBackend *blk;
155 int64_t size;
156 PFlashCFI01 *system_flash;
157 MemoryRegion *flash_mem;
158 void *flash_ptr;
159 int ret, flash_size;
160
161 assert(PC_MACHINE_GET_CLASS(pcms)->pci_enabled);
162
163 for (i = 0; i < ARRAY_SIZE(pcms->flash); i++) {
164 system_flash = pcms->flash[i];
165 blk = pflash_cfi01_get_blk(system_flash);
166 if (!blk) {
167 break;
168 }
169 size = blk_getlength(blk);
170 if (size < 0) {
171 error_report("can't get size of block device %s: %s",
172 blk_name(blk), strerror(-size));
173 exit(1);
174 }
175 if (size == 0 || !QEMU_IS_ALIGNED(size, FLASH_SECTOR_SIZE)) {
176 error_report("system firmware block device %s has invalid size "
177 "%" PRId64,
178 blk_name(blk), size);
179 info_report("its size must be a non-zero multiple of 0x%x",
180 FLASH_SECTOR_SIZE);
181 exit(1);
182 }
183 if ((hwaddr)size != size
184 || total_size > HWADDR_MAX - size
185 || total_size + size > FLASH_SIZE_LIMIT) {
186 error_report("combined size of system firmware exceeds "
187 "%" PRIu64 " bytes",
188 FLASH_SIZE_LIMIT);
189 exit(1);
190 }
191
192 total_size += size;
193 qdev_prop_set_uint32(DEVICE(system_flash), "num-blocks",
194 size / FLASH_SECTOR_SIZE);
195 sysbus_realize_and_unref(SYS_BUS_DEVICE(system_flash), &error_fatal);
196 sysbus_mmio_map(SYS_BUS_DEVICE(system_flash), 0,
197 0x100000000ULL - total_size);
198
199 if (i == 0) {
200 flash_mem = pflash_cfi01_get_memory(system_flash);
201 pc_isa_bios_init(rom_memory, flash_mem, size);
202
203 /* Encrypt the pflash boot ROM */
204 if (kvm_memcrypt_enabled()) {
205 flash_ptr = memory_region_get_ram_ptr(flash_mem);
206 flash_size = memory_region_size(flash_mem);
207 ret = kvm_memcrypt_encrypt_data(flash_ptr, flash_size);
208 if (ret) {
209 error_report("failed to encrypt pflash rom");
210 exit(1);
211 }
212 }
213 }
214 }
215 }
216
217 void pc_system_firmware_init(PCMachineState *pcms,
218 MemoryRegion *rom_memory)
219 {
220 PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
221 int i;
222 BlockBackend *pflash_blk[ARRAY_SIZE(pcms->flash)];
223
224 if (!pcmc->pci_enabled) {
225 x86_bios_rom_init(rom_memory, true);
226 return;
227 }
228
229 /* Map legacy -drive if=pflash to machine properties */
230 for (i = 0; i < ARRAY_SIZE(pcms->flash); i++) {
231 pflash_cfi01_legacy_drive(pcms->flash[i],
232 drive_get(IF_PFLASH, 0, i));
233 pflash_blk[i] = pflash_cfi01_get_blk(pcms->flash[i]);
234 }
235
236 /* Reject gaps */
237 for (i = 1; i < ARRAY_SIZE(pcms->flash); i++) {
238 if (pflash_blk[i] && !pflash_blk[i - 1]) {
239 error_report("pflash%d requires pflash%d", i, i - 1);
240 exit(1);
241 }
242 }
243
244 if (!pflash_blk[0]) {
245 /* Machine property pflash0 not set, use ROM mode */
246 x86_bios_rom_init(rom_memory, false);
247 } else {
248 if (kvm_enabled() && !kvm_readonly_mem_enabled()) {
249 /*
250 * Older KVM cannot execute from device memory. So, flash
251 * memory cannot be used unless the readonly memory kvm
252 * capability is present.
253 */
254 error_report("pflash with kvm requires KVM readonly memory support");
255 exit(1);
256 }
257
258 pc_system_flash_map(pcms, rom_memory);
259 }
260
261 pc_system_flash_cleanup_unused(pcms);
262 }