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boot/grub2: update readme.txt details

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For the Qemu-compatible UEFI firmware, the kraxel.org pointed to by
the readme.txt file is outdated. Instead, instruct users to use EDK2.
either by building it from source, or by grabbing pre-built ones, or
from their distributions.

While at it, drop the pci=nocrs information, as it is no longer
needed.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
This commit is contained in:
Thomas Petazzoni 2022-07-19 09:40:41 +02:00 committed by Yann E. MORIN
parent 7f3debbc37
commit 13bb419938
1 changed files with 15 additions and 13 deletions
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28
boot/grub2/readme.txt
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@ -86,17 +86,14 @@ Notes on using Grub2 for x86/x86_64 EFI-based platforms
To test your i386/x86-64 EFI image in Qemu
------------------------------------------
1. Download the EFI BIOS for Qemu
Version IA32 or X64 depending on the chosen Grub2
platform (i386-efi vs. x86-64-efi)
https://www.kraxel.org/repos/jenkins/edk2/
(or use one provided by your distribution as OVMF)
2. Extract, and rename OVMF.fd to bios.bin and
CirrusLogic5446.rom to vgabios-cirrus.bin.
3. qemu-system-{i386,x86-64} -L ovmf-dir/ -hda disk.img
4. Make sure to pass pci=nocrs to the kernel command line,
to workaround a bug in the EFI BIOS regarding the
EFI framebuffer.
1. Download/install the EFI BIOS for Qemu
You can get it using the edk2 package in Buildroot (installed
in BINARIES_DIR), grab prebuilt images from the unofficial nightly
builds [0], or use one provided by your distribution as OVMF.
[0] https://github.com/retrage/edk2-nightly
2. qemu-system-{i386,x86-64} -bios <path-to-OVMF.fd> -hda disk.img
Notes on using Grub2 for ARM u-boot-based platforms
===================================================
@ -177,8 +174,13 @@ using qemu and EFI firmware built for qemu.
2. make
3. Download the EFI firmware for qemu aarch64
https://www.kraxel.org/repos/jenkins/edk2/
(or use one provided by your distribution as OVMF-aarch64 or AAVMF)
You can get it using the edk2 package in Buildroot (installed
in BINARIES_DIR), grab prebuilt images from the unofficial nightly
builds [1], or use one provided by your distribution as OVMF-aarch64
or AAVMF.
[1] https://github.com/retrage/edk2-nightly
4. Run qemu with: