Messages in this thread | | | From | Gene Heskett <> | Subject | Re: AMD microcode loading broken on 32 bit | Date | Thu, 23 Jan 2014 13:54:06 -0500 |
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On Thursday 23 January 2014, Boris Ostrovsky wrote: >On 01/21/2014 01:25 PM, Borislav Petkov wrote: >> On Tue, Jan 21, 2014 at 12:55:53PM -0500, Boris Ostrovsky wrote: >>> cat $(AMD_UCODE_PATH)/* > >>> >>> ucode_initrd/kernel/x86/microcode/AuthenticAMD.bin >>> >>> (cd ucode_initrd;find . | cpio -o -H newc > >>> >>> ../$(DISTDIR)/common/ucode_initrd.cpio) >>> >>> ... >>> cat $(DISTDIR)/common/ucode_initrd.cpio \ >>> >>> $(DISTDIR)/common/_initramfs.cpio.gz > \ >>> $(DISTDIR)/common/initramfs.cpio.gz >>> >>> and as I just discovered, with a little twist: apparently >>> AMD_UCODE_PATH points to Intel microcode. >> >> LOL! >> >> @hpa: in case you were wondering whether Intel ucode works on AMD - it >> doesn't! :-) >> >>> So we clearly screwed up on our end but I'd think that we shouldn't >>> crash when this happens. >> >> Yes, we shouldn't. I'll try to reproduce it here. > >So I tried this on a "good" system and I am pretty sure this is broken. >I don't >have any microcode in initrd and I am still dying in >load_microcode_amd().
You can find the code on AMD's web site if you look carefully, or at least I was able to some years ago when I built this box. There s/b an installer that lives in /etc/init.d, and the code itself normally lives in the /lib/firmware/amd-ucode/ directory.
If its working correctly you should see something resembling this in your dmsg with: gene@coyote$ grep microcode /var/log/dmesg [ 22.572212] microcode: CPU0: patch_level=0x01000065 [ 22.573242] microcode: CPU0: new patch_level=0x01000083 [ 22.573256] microcode: CPU1: patch_level=0x01000065 [ 22.573263] microcode: CPU1: new patch_level=0x01000083 [ 22.573273] microcode: CPU2: patch_level=0x01000065 [ 22.573281] microcode: CPU2: new patch_level=0x01000083 [ 22.573293] microcode: CPU3: patch_level=0x01000065 [ 22.573301] microcode: CPU3: new patch_level=0x01000083 [ 22.573377] microcode: Microcode Update Driver: v2.00 <tigran@aivazian.fsnet.co.uk>, Peter Oruba
That was from a bootup to 3.12.6, 32 bit PAE, on a quad core phenom.
Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene>
NOTICE: Will pay 100 USD for an HP-4815A defective but complete probe assembly.
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