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Hammett
Apprentice
Joined: 26 Jan 2005
Posts: 223
Location: Barcelona, Catalonia
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 Posted: Tue Mar 26, 2024 12:51 pm Post subject: Is microcode being applied? |
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Hi all,
I am having serious doubts I am applying correctly the AMD microcode for my Ryzen 3600.
I have followed the instructions on https://wiki.gentoo.org/wiki/AMD_microcode, although the screenshots are a bit different from the current kernel (6.8.1)
I have decided to load the microcode into the kernel, and not use an initramfs. This (if I understood correctly) should build the microcode right into the kernel and I do not need anything else.
| Code: | -*-Firmware loading facility
(amd-ucode/microcode_amd_fam17h.bin) Build named firmware blobs into the kernel binary
(/lib/firmware) Firmware blobs root directory
[] Enable the firmware sysfs fallback mechanism
[] Enable compressed firmware support
[] Enable users to initiate firmware updates using sysfs |
However, when I compile and boot the kernel, I don't see the "microcode: updated early" message in dmesg. In fact I see two kind of messages, depending on the kernel:
Kernel 6.6.2: | Code: | [hammett][/home/hammett] dmesg | grep micro
[Tue Mar 26 10:48:34 2024] Zenbleed: please update your microcode for the most optimal fix
[Tue Mar 26 10:48:34 2024] Speculative Return Stack Overflow: IBPB-extending microcode not applied!
[Tue Mar 26 10:48:35 2024] microcode: CPU0: patch_level=0x08701021
[Tue Mar 26 10:48:35 2024] microcode: CPU1: patch_level=0x08701021
[Tue Mar 26 10:48:35 2024] microcode: CPU2: patch_level=0x08701021
[Tue Mar 26 10:48:35 2024] microcode: CPU5: patch_level=0x08701021
[Tue Mar 26 10:48:35 2024] microcode: CPU3: patch_level=0x08701021
[Tue Mar 26 10:48:35 2024] microcode: CPU6: patch_level=0x08701021
[Tue Mar 26 10:48:35 2024] microcode: CPU7: patch_level=0x08701021
[Tue Mar 26 10:48:35 2024] microcode: CPU4: patch_level=0x08701021
[Tue Mar 26 10:48:35 2024] microcode: CPU8: patch_level=0x08701021
[Tue Mar 26 10:48:35 2024] microcode: CPU9: patch_level=0x08701021
[Tue Mar 26 10:48:35 2024] microcode: CPU10: patch_level=0x08701021
[Tue Mar 26 10:48:35 2024] microcode: CPU11: patch_level=0x08701021
[Tue Mar 26 10:48:35 2024] microcode: Microcode Update Driver: v2.2. |
Kernel 6.8.1: | Code: | [hammett][/home/hammett] dmesg | grep micro
[Tue Mar 26 10:45:45 2024] Zenbleed: please update your microcode for the most optimal fix
[Tue Mar 26 10:45:45 2024] microcode: Current revision: 0x08701021 |
I am not seeing any firmware files being applied: | Code: | [hammett][/home/hammett]$ dmesg | grep -i firmware
[Tue Mar 26 13:29:42 2024] Spectre V2 : Enabling Speculation Barrier for firmware calls
[Tue Mar 26 13:29:42 2024] ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored
[Tue Mar 26 13:29:43 2024] acpi PNP0A08:00: [Firmware Info]: ECAM [mem 0xf0000000-0xf7ffffff] for domain 0000 [bus 00-7f] only partially covers this bridge |
Moreover, it seems that patch 0x08701021 is not the most recent one either according to the readme of the AMD Microcode | Code: | Microcode patches in microcode_amd_fam17h.bin:
Family=0x17 Model=0x08 Stepping=0x02: Patch=0x0800820d Length=3200 bytes
Family=0x17 Model=0x31 Stepping=0x00: Patch=0x0830107b Length=3200 bytes
Family=0x17 Model=0xa0 Stepping=0x00: Patch=0x08a00008 Length=3200 bytes
Family=0x17 Model=0x01 Stepping=0x02: Patch=0x0800126e Length=3200 bytes
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So, is there anything wrong? I would like to avoid using an initramfs if possible, and according to the wiki, this should be possible.
Also to understand if the different dmesg output between kernels means that they just changed the log output, or it is definitely not applied in kernel 6.8.1 (which would be another issue, since is compiled with make olddefconfig from 6.6.2)
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pietinger
Moderator
Joined: 17 Oct 2006
Posts: 4157
Location: Bavaria
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| Posted: Tue Mar 26, 2024 1:00 pm Post subject: Re: Is microcode being applied? |
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| Hammett wrote: | | However, when I compile and boot the kernel, I don't see the "microcode: updated early" message in dmesg. |
It's okay; this has been removed (for both: your AMD system and my Intel system).
| Hammett wrote: | | [...] In fact I see two kind of messages, depending on the kernel: |
Yes, this has changed between 6.6 and 6.8, and your settings in 6.8 should be okay when you did a "make oldconfig" or "make olddefconfig" !
(you dont see the microcode loading when you grep for firmware)
This line (in 6.8 ) says it is all fine:
| Code: | | [Tue Mar 26 10:45:45 2024] microcode: Current revision: 0x08701021 |
(P.S.: Do you have sys-kernel/linux-firmware from 20240312 ?)
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Hammett
Apprentice
Joined: 26 Jan 2005
Posts: 223
Location: Barcelona, Catalonia
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| Posted: Tue Mar 26, 2024 1:59 pm Post subject: Re: Is microcode being applied? |
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| pietinger wrote: | | (P.S.: Do you have sys-kernel/linux-firmware from 20240312 ?) |
Yes, I do have sys-kernel/linux-firmware from 20240312 installed
Thanks for the reply! Good to know everything is in order.
The only missing piece of the puzzle, is why I do get applied a patch different from the ones available in the bin microcode file.... 
Kind regards
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figueroa
Advocate
Joined: 14 Aug 2005
Posts: 2963
Location: Edge of marsh USA
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| Posted: Sat Mar 30, 2024 2:33 am Post subject: |
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With gentoo-sources-6.8.1
| Code: | $ dmesg | grep microc
[Thu Mar 28 09:22:49 2024] microcode: Current revision: 0x0000002f
[Thu Mar 28 09:22:49 2024] microcode: Updated early from: 0x00000023 |
ADDED: This is on an Intel i7
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Andy Figueroa
hp pavilion hpe h8-1260t/2AB5; spinning rust x3
i7-2600 @ 3.40GHz; 16 gb; Radeon HD 7570
amd64/23.0/split-usr/desktop (stable), OpenRC, -systemd -pulseaudio -uefi |
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figueroa
Advocate
Joined: 14 Aug 2005
Posts: 2963
Location: Edge of marsh USA
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| Posted: Sun Mar 31, 2024 4:06 am Post subject: |
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This is on an AMD Phenom and Kernel gentoo-sources-6.1.74:
| Code: | $ dmesg | grep -i microc
[Tue Mar 26 13:23:04 2024] [drm] Loading RS780 Microcode
[Tue Mar 26 13:23:05 2024] microcode: CPU0: patch_level=0x01000095
[Tue Mar 26 13:23:05 2024] microcode: CPU1: patch_level=0x01000095
[Tue Mar 26 13:23:05 2024] microcode: CPU2: patch_level=0x01000095
[Tue Mar 26 13:23:05 2024] microcode: Microcode Update Driver: v2.2. |
_________________
Andy Figueroa
hp pavilion hpe h8-1260t/2AB5; spinning rust x3
i7-2600 @ 3.40GHz; 16 gb; Radeon HD 7570
amd64/23.0/split-usr/desktop (stable), OpenRC, -systemd -pulseaudio -uefi |
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