On Fri, Jan 05, 2018 at 10:09:57PM +0000, Ken Moffat wrote:
>
> But that is just a 'data' file and I had no idea how to use it.
> Fortunately, gentoo also use iucode_tool and their wiki shows:
>
> iucode_tool -S --write-earlyfw=/boot/early_ucode.cpio
> /lib/firmware/intel-ucode/*
>
> I'm already set for early loading, and -S interrogates the current
> machine to find its processor, so I tried that against
> intel-microcode-64.bin and succeeded in getting a cpio.
>
> I then moved that to /boot (keeping my existing microcode.img, after
> the problems on my skylake), and changed the initrd only for the
> current PTI kernel (just in case).
>
I then tried iucode_tool --write-earlyfw=/some/cpio
intel-microcode-64.bin : that works, in as much as it put all the
microcode into a single cpio, and early loading looked through that
and found the right fw. But that was on my SandyBridge, and the
latest microcode version is still 0x22, i.e. no change.
But for people who have multiple different intel machines, and are
set to use early loading, taking the debian firmware package (if you
are happy that the unreleased fw is ok ;-) is a viable way of
benerating a bigger initrd (1.4 MB for only the 64-bit versions)
which can be quickly rolled out.
ĸen
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