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misc/emulation: add note about u-boot on qemu 

Signed-off-by: Leah Rowe <leah@libreboot.org>
master
Leah Rowe 2023-09-11 17:20:57 +01:00
parent bee4130d88
commit 34ea0e1f7e
1 changed files with 7 additions and 3 deletions
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10
site/docs/misc/emulation.md
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@ -23,19 +23,23 @@ In order to test the resulting roms, you must have qemu installed on the host ma
Test the roms by pointing qemu to the rom in bios mode. Test the roms by pointing qemu to the rom in bios mode.
For example: For example:
`qemu-system-x86_64 -bios bin/qemu_x86_12mb/grub_qemu_x86_12mb_libgfxinit_corebootfb_usqwerty.rom` `qemu-system-x86_64 -bios bin/qemu_x86_12mb/grub_qemu_x86_12mb_libgfxinit_corebootfb_usqwerty_noblobs.rom`
`qemu-system-x86_64 -bios bin/qemu_x86_12mb/uboot_payload_qemu_x86_12mb_libgfxinit_corebootfb.rom -serial stdio` `qemu-system-x86_64 -bios bin/qemu_x86_12mb/uboot_payload_qemu_x86_12mb_libgfxinit_corebootfb_noblobs.rom -serial stdio`
There is basic support for an arm64 virtual machine as well, although the payloads are not as developed as the x86 one: There is basic support for an arm64 virtual machine as well, although the payloads are not as developed as the x86 one:
./build boot roms qemu_arm64_12mb ./build boot roms qemu_arm64_12mb
``` ```
qemu-system-aarch64 -bios bin/qemu_arm64_12mb/uboot_payload_qemu_arm64_12mb_libgfxinit_corebootfb.rom \ qemu-system-aarch64 -bios bin/qemu_arm64_12mb/uboot_payload_qemu_arm64_12mb_libgfxinit_corebootfb_noblobs.rom \
-M virt,secure=on,virtualization=on,acpi=on -cpu cortex-a53 -m 768M -serial stdio -vga none -display none -M virt,secure=on,virtualization=on,acpi=on -cpu cortex-a53 -m 768M -serial stdio -vga none -display none
``` ```
NOTE: After the 20230625 release, U-Boot support was removed from x86 Qemu; it's
also problematic on ARM-based Qemu. Only x86 qemu, with other payloads, is to
be considered reliable for now.
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