| /* |
| * QEMU PC System Firmware |
| * |
| * Copyright (c) 2003-2004 Fabrice Bellard |
| * Copyright (c) 2011-2012 Intel Corporation |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "qapi/error.h" |
| #include "sysemu/block-backend.h" |
| #include "qemu/error-report.h" |
| #include "qemu/option.h" |
| #include "qemu/units.h" |
| #include "hw/sysbus.h" |
| #include "hw/i386/x86.h" |
| #include "hw/i386/pc.h" |
| #include "hw/loader.h" |
| #include "hw/qdev-properties.h" |
| #include "hw/block/flash.h" |
| #include "sysemu/kvm.h" |
| #include "sev.h" |
| |
| #define FLASH_SECTOR_SIZE 4096 |
| |
| static void pc_isa_bios_init(MemoryRegion *rom_memory, |
| MemoryRegion *flash_mem, |
| int ram_size) |
| { |
| int isa_bios_size; |
| MemoryRegion *isa_bios; |
| uint64_t flash_size; |
| void *flash_ptr, *isa_bios_ptr; |
| |
| flash_size = memory_region_size(flash_mem); |
| |
| /* map the last 128KB of the BIOS in ISA space */ |
| isa_bios_size = MIN(flash_size, 128 * KiB); |
| isa_bios = g_malloc(sizeof(*isa_bios)); |
| memory_region_init_ram(isa_bios, NULL, "isa-bios", isa_bios_size, |
| &error_fatal); |
| memory_region_add_subregion_overlap(rom_memory, |
| 0x100000 - isa_bios_size, |
| isa_bios, |
| 1); |
| |
| /* copy ISA rom image from top of flash memory */ |
| flash_ptr = memory_region_get_ram_ptr(flash_mem); |
| isa_bios_ptr = memory_region_get_ram_ptr(isa_bios); |
| memcpy(isa_bios_ptr, |
| ((uint8_t*)flash_ptr) + (flash_size - isa_bios_size), |
| isa_bios_size); |
| |
| memory_region_set_readonly(isa_bios, true); |
| } |
| |
| static PFlashCFI01 *pc_pflash_create(PCMachineState *pcms, |
| const char *name, |
| const char *alias_prop_name) |
| { |
| DeviceState *dev = qdev_new(TYPE_PFLASH_CFI01); |
| |
| qdev_prop_set_uint64(dev, "sector-length", FLASH_SECTOR_SIZE); |
| qdev_prop_set_uint8(dev, "width", 1); |
| qdev_prop_set_string(dev, "name", name); |
| object_property_add_child(OBJECT(pcms), name, OBJECT(dev)); |
| object_property_add_alias(OBJECT(pcms), alias_prop_name, |
| OBJECT(dev), "drive"); |
| /* |
| * The returned reference is tied to the child property and |
| * will be removed with object_unparent. |
| */ |
| object_unref(OBJECT(dev)); |
| return PFLASH_CFI01(dev); |
| } |
| |
| void pc_system_flash_create(PCMachineState *pcms) |
| { |
| PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms); |
| |
| if (pcmc->pci_enabled) { |
| pcms->flash[0] = pc_pflash_create(pcms, "system.flash0", |
| "pflash0"); |
| pcms->flash[1] = pc_pflash_create(pcms, "system.flash1", |
| "pflash1"); |
| } |
| } |
| |
| void pc_system_flash_cleanup_unused(PCMachineState *pcms) |
| { |
| char *prop_name; |
| int i; |
| |
| assert(PC_MACHINE_GET_CLASS(pcms)->pci_enabled); |
| |
| for (i = 0; i < ARRAY_SIZE(pcms->flash); i++) { |
| if (!qdev_is_realized(DEVICE(pcms->flash[i]))) { |
| prop_name = g_strdup_printf("pflash%d", i); |
| object_property_del(OBJECT(pcms), prop_name); |
| g_free(prop_name); |
| object_unparent(OBJECT(pcms->flash[i])); |
| pcms->flash[i] = NULL; |
| } |
| } |
| } |
| |
| /* |
| * Map the pcms->flash[] from 4GiB downward, and realize. |
| * Map them in descending order, i.e. pcms->flash[0] at the top, |
| * without gaps. |
| * Stop at the first pcms->flash[0] lacking a block backend. |
| * Set each flash's size from its block backend. Fatal error if the |
| * size isn't a non-zero multiple of 4KiB, or the total size exceeds |
| * pcms->max_fw_size. |
| * |
| * If pcms->flash[0] has a block backend, its memory is passed to |
| * pc_isa_bios_init(). Merging several flash devices for isa-bios is |
| * not supported. |
| */ |
| static void pc_system_flash_map(PCMachineState *pcms, |
| MemoryRegion *rom_memory) |
| { |
| hwaddr total_size = 0; |
| int i; |
| BlockBackend *blk; |
| int64_t size; |
| PFlashCFI01 *system_flash; |
| MemoryRegion *flash_mem; |
| void *flash_ptr; |
| int flash_size; |
| |
| assert(PC_MACHINE_GET_CLASS(pcms)->pci_enabled); |
| |
| for (i = 0; i < ARRAY_SIZE(pcms->flash); i++) { |
| system_flash = pcms->flash[i]; |
| blk = pflash_cfi01_get_blk(system_flash); |
| if (!blk) { |
| break; |
| } |
| size = blk_getlength(blk); |
| if (size < 0) { |
| error_report("can't get size of block device %s: %s", |
| blk_name(blk), strerror(-size)); |
| exit(1); |
| } |
| if (size == 0 || !QEMU_IS_ALIGNED(size, FLASH_SECTOR_SIZE)) { |
| error_report("system firmware block device %s has invalid size " |
| "%" PRId64, |
| blk_name(blk), size); |
| info_report("its size must be a non-zero multiple of 0x%x", |
| FLASH_SECTOR_SIZE); |
| exit(1); |
| } |
| if ((hwaddr)size != size |
| || total_size > HWADDR_MAX - size |
| || total_size + size > pcms->max_fw_size) { |
| error_report("combined size of system firmware exceeds " |
| "%" PRIu64 " bytes", |
| pcms->max_fw_size); |
| exit(1); |
| } |
| |
| total_size += size; |
| qdev_prop_set_uint32(DEVICE(system_flash), "num-blocks", |
| size / FLASH_SECTOR_SIZE); |
| sysbus_realize_and_unref(SYS_BUS_DEVICE(system_flash), &error_fatal); |
| sysbus_mmio_map(SYS_BUS_DEVICE(system_flash), 0, |
| 0x100000000ULL - total_size); |
| |
| if (i == 0) { |
| flash_mem = pflash_cfi01_get_memory(system_flash); |
| pc_isa_bios_init(rom_memory, flash_mem, size); |
| |
| /* Encrypt the pflash boot ROM */ |
| if (sev_enabled()) { |
| flash_ptr = memory_region_get_ram_ptr(flash_mem); |
| flash_size = memory_region_size(flash_mem); |
| x86_firmware_configure(flash_ptr, flash_size); |
| } |
| } |
| } |
| } |
| |
| void pc_system_firmware_init(PCMachineState *pcms, |
| MemoryRegion *rom_memory) |
| { |
| PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms); |
| int i; |
| BlockBackend *pflash_blk[ARRAY_SIZE(pcms->flash)]; |
| |
| if (!pcmc->pci_enabled) { |
| x86_bios_rom_init(MACHINE(pcms), "bios.bin", rom_memory, true); |
| return; |
| } |
| |
| /* Map legacy -drive if=pflash to machine properties */ |
| for (i = 0; i < ARRAY_SIZE(pcms->flash); i++) { |
| pflash_cfi01_legacy_drive(pcms->flash[i], |
| drive_get(IF_PFLASH, 0, i)); |
| pflash_blk[i] = pflash_cfi01_get_blk(pcms->flash[i]); |
| } |
| |
| /* Reject gaps */ |
| for (i = 1; i < ARRAY_SIZE(pcms->flash); i++) { |
| if (pflash_blk[i] && !pflash_blk[i - 1]) { |
| error_report("pflash%d requires pflash%d", i, i - 1); |
| exit(1); |
| } |
| } |
| |
| if (!pflash_blk[0]) { |
| /* Machine property pflash0 not set, use ROM mode */ |
| x86_bios_rom_init(MACHINE(pcms), "bios.bin", rom_memory, false); |
| } else { |
| if (kvm_enabled() && !kvm_readonly_mem_enabled()) { |
| /* |
| * Older KVM cannot execute from device memory. So, flash |
| * memory cannot be used unless the readonly memory kvm |
| * capability is present. |
| */ |
| error_report("pflash with kvm requires KVM readonly memory support"); |
| exit(1); |
| } |
| |
| pc_system_flash_map(pcms, rom_memory); |
| } |
| |
| pc_system_flash_cleanup_unused(pcms); |
| } |
| |
| void x86_firmware_configure(void *ptr, int size) |
| { |
| int ret; |
| |
| /* |
| * OVMF places a GUIDed structures in the flash, so |
| * search for them |
| */ |
| pc_system_parse_ovmf_flash(ptr, size); |
| |
| if (sev_enabled()) { |
| ret = sev_es_save_reset_vector(ptr, size); |
| if (ret) { |
| error_report("failed to locate and/or save reset vector"); |
| exit(1); |
| } |
| |
| sev_encrypt_flash(ptr, size, &error_fatal); |
| } |
| } |
