On Thursday 02 Feb 2017 10:19:57 Peter Humphrey wrote: > On Wednesday 01 Feb 2017 22:34:09 Mick wrote: > --->8 > > > I eventually got on top of this. No initramfs is needed, although if you > > are using one then it will serve the same purpose too. > > > > These are the steps I followed: > > > > Emerged sys-apps/iucode_tool and ran: > > > > iucode_tool -S > > > > which spewed out the CPU signature as: 0x00040661 > > > > Then I emerged intel-microcode with USE=split-ucode, to generate the > > microcode binaries the kernel can use directly. Saving and searching > > > > through the output of the emerge compilation I found this snippet: > > intel-ucode/06-46-01 > > signature: 0x40661 <===< > > flags: 0x32 > > revision: 0x16 > > date: 2016-04-01 > > size: 24576 > > > > Previously in a rush, I got confused when I compared the hex notation of > > the CPU signature with 0x000 in front of it, with the above. Thereafter > > I added 'intel-ucode/06-46-01' in the kernel, like so: > > > > Device Drivers ---> > > > > Generic Driver Options ---> > > > > [*] Include in-kernel firmware blobs in kernel binary > > (intel-ucode/06-46-01 <other_CPU_firmware_follows_here>) External > > > > firmware blobs to build into the kernel binary > > > > (/lib/firmware/) Firmware blobs root directory > > > > The intel-ucode needs to be loaded early at the start of the boot process, > > so I put it first and comma separated the rest of the CPU firmware blobs. > > Mine are all space separated.
I beg your pardon! I must slow down and read again what I write before I click send ... Yes, you are correct, the blob entries must be space separated. > > I now get an output which clearly states "microcode updated early". > > The first line of dmesg says so here now, for the first core, then 50 ms > later the other cores follow suit. > > > I posted this in case it helps others too. > > And I'm grateful. I hadn't got round to tweaking CPU microcode, but seeing > your post I thought it would be a good idea. You're welcome. :-) -- Regards, Mick
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