Re: AMD zen microcode updates breaks boot

[Borislav Petkov]

On Sun, Oct 20, 2024 at 06:47:25PM -0600, Jens Axboe wrote:
> Works, outside of waiting 3 min for the serial console spewage from the
> patch! But it boots and it's happy after that. Attached here gzip'ed as
> it's 1.3M otherwise.

Thanks for testing.

Lemme write proper patches, run them everywhere here and give them to you for
one final testing.

> I get:
> 
> root@r7625 ~# echo 1 > /sys/devices/system/cpu/microcode/reload
> warning: An error occurred while redirecting file '/sys/devices/system/cpu/microcode/reload'
> open: Permission denied
> 
> and no output in dmesg.

Right, you need

CONFIG_MICROCODE_LATE_LOADING=y

for that.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette