| .. SPDX-License-Identifier: GPL-2.0+ | |
| qfw command | |
| =========== | |
| Synopsis | |
| -------- | |
| :: | |
| qfw list | |
| qfw cpus | |
| qfw load [kernel_addr [initrd_addr]] | |
| Description | |
| ----------- | |
| The *qfw* command is used to retrieve information form the QEMU firmware. | |
| The *qfw list* sub-command displays the QEMU firmware files. | |
| The *qfw cpus* sub-command displays the available CPUs. | |
| The *qfw load* command is used to load a kernel and an initial RAM disk. | |
| kernel_addr | |
| address to which the file specified by the -kernel parameter of QEMU shall | |
| be loaded. Defaults to environment variable *loadaddr* and further to | |
| the value of *CONFIG_SYS_LOAD_ADDR*. | |
| initrd_addr | |
| address to which the file specified by the -initrd parameter of QEMU shall | |
| be loaded. Defaults to environment variable *ramdiskaddr* and further to | |
| the value of *CONFIG_RAMDISK_ADDR*. | |
| Examples | |
| -------- | |
| QEMU firmware files are listed via the *qfw list* command: | |
| :: | |
| => qfw list | |
| etc/boot-fail-wait | |
| etc/smbios/smbios-tables | |
| etc/smbios/smbios-anchor | |
| etc/e820 | |
| genroms/kvmvapic.bin | |
| genroms/linuxboot.bin | |
| etc/system-states | |
| etc/acpi/tables | |
| etc/table-loader | |
| etc/tpm/log | |
| etc/acpi/rsdp | |
| bootorder | |
| The available CPUs can be shown via the *qfw cpus* command: | |
| :: | |
| => qfw cpu | |
| 2 cpu(s) online | |
| The *-kernel* and *-initrd* parameters allow to specify a kernel and an | |
| initial RAM disk for QEMU: | |
| .. code-block:: bash | |
| $ qemu-system-x86_64 -machine pc-i440fx-2.5 -bios u-boot.rom -m 1G \ | |
| -nographic -kernel vmlinuz -initrd initrd | |
| Now the kernel and the initial RAM disk can be loaded to the U-Boot memory via | |
| the *qfw load* command and booted thereafter. | |
| :: | |
| => qfw load ${kernel_addr_r} ${ramdisk_addr_r} | |
| loading kernel to address 0000000001000000 size 5048f0 initrd 0000000004000000 size 3c94891 | |
| => zboot 1000000 5048f0 4000000 3c94891 | |
| Valid Boot Flag | |
| Magic signature found | |
| Linux kernel version 4.19.0-14-amd64 (debian-kernel@lists.debian.org) #1 SMP Debian 4.19.171-2 (2021-01-30) | |
| Building boot_params at 0x00090000 | |
| Loading bzImage at address 100000 (5260160 bytes) | |
| Configuration | |
| ------------- | |
| The qfw command is only available if CONFIG_CMD_QFW=y. |