Re: x86: Apply microcode updates in GRUB?

[Vladimir 'phcoder' Serbinenko]

Answer is easy: you're welcome to write a patch to add a command. Making running this command a default is a separate discussion

Le sam. 29 juil. 2023, 08:54, Paul Menzel <pmenzel@molgen.mpg.de> a écrit :

Dear GRUB folks,


On x86 microcode updates often are recommended to be applied to fix
bugs. Just recently new microcode updates where published for AMD Zen 2
processors to fix “Zenbleed” [1].

Currently, these updates are shipped and applied by the firmware, and –
mainly due to the proprietary and closed source x86 firmware ecosystem
is slow to ship these updates and firmware updates are cumbersome to
apply in this ecosystem – the operating systems like the Linux kernel
[2] (but I believe also Microsoft Windows) also support to apply these
updates.

Should boot loaders be able to apply these updates, so these can be
applied on systems for operating systems without such a feature?


Kind regards,

Paul


[1]: https://lock.cmpxchg8b.com/zenbleed.html
[2]: https://docs.kernel.org/arch/x86/microcode.html

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