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I just noticed that microcode patches (amd-ucode) are not being applied on my system. I use systemd-boot.
# journalctl -k --grep=microcode
mrt 03 20:54:25 [REDACTED] kernel: Zenbleed: please update your microcode for the most optimal fix
mrt 03 20:54:25 [REDACTED] kernel: microcode: Current revision: 0x08701021
I have "systemd-boot-update.service" enabled. Also:
# bootctl update
Skipping "/boot/EFI/systemd/systemd-bootx64.efi", same boot loader version in place already.
Skipping "/boot/EFI/BOOT/BOOTX64.EFI", same boot loader version in place already.
In "/boot/loader/entries/arch.conf" (only file here):
title Arch Linux
linux /vmlinuz-linux
initrd /amd-ucode.img
initrd /initramfs-linux.img
options root="UUID=[REDACTED]" rw
I don't understand why it's not working. Anyone else know what the issue is?
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Unless you're on a server/datacenter processor, chances of getting ucode updates from the amd-ucode package are pretty much non-existent.
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So I should just ignore this?
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You get updates from your motherboard maker, so check there first. There are people that have extracted the microcode from their firmware, see https://aur.archlinux.org/packages/amd- … e-platomav
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I have updated the motherboard, but it didn't change anything. I'll guess it's okay.
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I have updated the motherboard, but it didn't change anything. I'll guess it's okay.
That's because no manufacturer has yet released a bios that includes the microcode fix for Zenbleed.
Excuse my poor English.
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You get updates from your motherboard maker, so check there first.
Do you mean update UEFI?
Unless you're on a server/datacenter processor, chances of getting ucode updates from the amd-ucode package are pretty much non-existent.
Wait, does it mean the amd-ucode package do nothing?
Previously I had Intel cpu where ucode was applied, Is that AMD specific or maybe bad configs after all?
❯ sudo journalctl -k --grep=microcode
[sudo] password for lex:
Mar 22 07:17:07 lenovo-laptop kernel: Speculative Return Stack Overflow: IBPB-extending microcode not applied!
Mar 22 07:17:07 lenovo-laptop kernel: Speculative Return Stack Overflow: Vulnerable: Safe RET, no microcode
Mar 22 07:17:07 lenovo-laptop kernel: microcode: Current revision: 0x0a704101
Ukrainian
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Wait, does it mean the amd-ucode package do nothing?
For consumer AMD Ryzen CPUs it currently does nothing. It's still useful for other (older or server) AMD CPUs.
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