[arch-releng] [RFC] [PATCH] [configs/releng] Make and use amd_ucode.bin for initrd.

[Bryan L. Gay]

I'd like to think I could do some verification since I'm on AMD... I'm new
here, so help me along if there's something I've missed.

I enabled the [testing] repo and installed:
pacman -S testing/linux testing/amd-ucode testing/linux-firmware

pacman -Q linux linux-firmware amd-ucode
linux 4.18.5.arch1-1
linux-firmware 20180821.1d17c18-2
amd-ucode 20180821.1d17c18-2

I did a mkinitcpio -p linux just in case, then rebooted.

output of `dmesg | grep -ie code -ie amd` (with obvious fluff removed):

[    0.000000]   AMD AuthenticAMD
[    0.000000] random: get_random_u32 called from bsp_init_amd+0x1f9/0x290
with crng_init=0
[    0.000000] ACPI: SSDT 0x00000000BFDDFB10 001714 (v01 AMD    POWERNOW
00000001 AMD  00000001)
[    0.000000] ACPI: IVRS 0x00000000BFDE12A0 0000E8 (v01 AMD    RD890S
 00202031 AMD  00000000)
[    0.025991] Spectre V2 : Mitigation: Full AMD retpoline
[    0.036666] smpboot: CPU0: AMD FX(tm)-8120 Eight-Core Processor (family:
0x15, model: 0x1, stepping: 0x2)
[    0.053345] Performance Events: Fam15h core perfctr, AMD PMU driver.
[    1.950177] amd_uncore: AMD NB counters detected
[    1.950462] perf: AMD IBS detected (0x000000ff)
[    2.018364] microcode: CPU0: patch_level=0x0600063d
[    2.018371] microcode: CPU1: patch_level=0x0600063d
[    2.018379] microcode: CPU2: patch_level=0x0600063d
[    2.018388] microcode: CPU3: patch_level=0x0600063d
[    2.018396] microcode: CPU4: patch_level=0x0600063d
[    2.018403] microcode: CPU5: patch_level=0x0600063d
[    2.018410] microcode: CPU6: patch_level=0x0600063d
[    2.018418] microcode: CPU7: patch_level=0x0600063d
[    2.018457] microcode: Microcode Update Driver: v2.2.
[    2.375803] QUIRK: Enable AMD PLL fix
[    2.375865] ehci-pci 0000:00:12.2: applying AMD SB700/SB800/Hudson-2/3
EHCI dummy qh workaround
[    2.391345] ehci-pci 0000:00:13.2: applying AMD SB700/SB800/Hudson-2/3
EHCI dummy qh workaround
[    2.404862] ehci-pci 0000:00:16.2: applying AMD SB700/SB800/Hudson-2/3
EHCI dummy qh workaround
[    5.980964] microcode: CPU1: new patch_level=0x0600063e
[    5.992588] microcode: CPU4: new patch_level=0x0600063e
[    6.013367] microcode: CPU2: new patch_level=0x0600063e
[    6.034148] microcode: CPU6: new patch_level=0x0600063e
[    6.034221] x86/CPU: CPU features have changed after loading microcode,
but might not take effect.

Those microcode: lines at the end total 4, while I have an 8-core AMD
FX-8120 - and the CPU numbers are usually different at each boot.

Is there anything else I can do to assist?

On Fri, Aug 24, 2018 at 5:10 PM Christian Hesse <list at eworm.de> wrote:

> Gerardo Exequiel Pozzi via arch-releng <arch-releng at archlinux.org> on Fri,
> 2018/08/24 17:34:
> > > And another note... Did anybody test if microcode is updated properly
> if
> > > both, intel-ucode.img and amd-ucode, are loaded?
> > >
> >
> > At least one feedback from intel user [#2], fw is loaded fine.
>
> Well, intel ucode is loaded first, so that result is kind of expected.
> Feedback from an amd user would be welcome.
> --
> main(a){char*c=/*    Schoene Gruesse                         */"B?IJj;MEH"
> "CX:;",b;for(a/*    Best regards             my address:    */=0;b=c[a++];)
> putchar(b-1/(/*    Chris            cc -ox -xc - && ./x
> */b/42*2-3)*42);}
>