Intel, AMD, VIA & Freescale CPU Microcode Repositories Discussion

plutomaniac · May 21, 2018, 2:42pm

cpu906E9_plat2A_ver0000008E_2018-03-24_PRD_5BB5F3CD
cpu806E9_platC0_ver0000008E_2018-03-24_PRD_44706881

mc.rar (122 KB)

Dekal · May 27, 2018, 1:08pm

Hello. I’m new here. I would like to mod the new CPU microcode updates to the BIOS of the GA-Z68X-UD7-B3. I wonder what the following CPUIDs are for:

cpu206A0_plat12_ver00000029_2009-11-02_PRD_D6930586.bin
cpu206A4_plat12_ver00000022_2010-04-14_PRD_8A6F7F91.bin
cpu20652_plat12_ver00000010_2018-02-04_PRD_AC3A178A.bin

Are they useful for anything?

konstantiniyyr1 · June 1, 2018, 9:17am

.

plutomaniac · June 1, 2018, 1:55pm

Microcodes

cpu10671_plat04_ver00000106_2007-03-29_PRD_80731BA9 and cpu10671_plat44_ver00000106_2007-03-29_PRD_80731B69

or

cpu10674_plat04_ver00000404_2007-06-08_PRD_F9DEC4BD and cpu10674_plat44_ver00000404_2007-06-08_PRD_F9DEC47D

are identical when it comes to their patch data as only the platform byte differs and thus the checksum. They may not really be outdated for your system (0x4 = 2) but someone else’s might not boot if the BIOS is requesting platform 6 of the same CPUID. So obviously the logical conclusion is to mark the one with more platform IDs as best/latest for MCE and its respective microcode repository.

quntuakinte · June 7, 2018, 11:52am

Hello, I’m new here. I’m looking for CPUs that fits my BIOS so I’ve edited it and if I’m right there’re missing some microcodes in repositories. Notebook is Asus X50SR-AP055, motherboard F5SR, installed BIOS 203 (F5SR203AS.zip) and the newest I can install is 212 (F5SRAS212.zip). After unzipping, file name is F5SRAS.203 so I’ve changed it to F5SRAS203.ROM (first I’ve edited it in MMTool v3.22) I’ve extracted both in MCE. Some microcodes are older but one from BIOS 203 is missing in repo: cpu10676_plat80_ver0000060C_2008-01-19_PRD_FBAC0EED.bin and from 212: cpu1067A_platA0_ver00000A07_2008-04-09_PRD_83067ECB.bin Now I see that I don’t have to change file extension, MCE accepts F5SRAS.203 and F5SRAS.212

plutomaniac · June 7, 2018, 12:34pm

cpu906EB_plat02_ver0000008E_2018-03-24_PRD_26138472

@ quntuakinte:

Read the GitHub ReadMe carefully.

cpu906EB_plat02_ver0000008E_2018-03-24_PRD_26138472.rar (96.3 KB)

davidm71 · June 17, 2018, 6:34pm

Hi,

Anyone know what 506E3 C6 fixes from C2 ??

Thanks

thurask · June 17, 2018, 10:49pm

I believe it’s for CVE-2018-3639. After updating my ASUS Maximus VIII Hero with the C6 microcode, running the Get-SpeculationControlSettings script says I have hardware support for mitigating SSBD.

https://portal.msrc.microsoft.com/en-US/…isory/ADV180012

thurask · June 17, 2018, 11:09pm

New?

cpu306E4_platED_ver0000042D_2018-04-25_PRD_25AD26F7.bin

!New_cpu306E4_platED_ver0000042D_2018-04-25_PRD_25AD26F7.zip (15.2 KB)

plutomaniac · June 18, 2018, 12:27am

Yes, it’s new, thank you @thurask . Also included in UBU so @SoniX .

SoniX · June 18, 2018, 1:33am

I forgot to add to DB. %))

plutomaniac · June 18, 2018, 12:57pm

You mean how to add? Use -? parameter to see the MCE options.

konstantiniyyr1 · June 19, 2018, 11:00pm

.

rdrguy · June 23, 2018, 12:34am

FYI …
Intel just released yesterday an updated “Microcode Revision Guidance” dated June 21 2018.

https://www.intel.com/content/dam/www/pu…te-guidance.pdf

No details other than …

I suspect this includes the next round of microcode fixes for Spectre Variant 4 as the microcode revisions are being updated from the previously released versions for Spectre Variant 2.

There are a lot more Intel CPU Microcode updates coming so be on the lookout for these.

dash · June 23, 2018, 4:58am

Yes, it is Spectre 3a + Spectre 4 fixes. Worth it for the 3a (which helps defeat kernel-level/VMX ASLR, and maybe even helps attack the SMM), even if you are not going to enable the Spectre 4 defense due to its heavy performance cost on most workloads.

plutomaniac · June 25, 2018, 3:33pm

cpu306A9_plat12_ver00000020_2018-04-10_PRD_732E4C38

cpu306A9_plat12_ver00000020_2018-04-10_PRD_732E4C38.rar (13.1 KB)

N6O7 · June 25, 2018, 7:59pm

Thank you Plutomaniac,

Updated my IVB bios with UBU v1.69.17.4 and the latest "cpu306A9_plat12_ver00000020_2018-04-10_PRD_732E4C38", to version 20.

scroll down:

I can’t see yet the Sandy Bridge 0x2E, otherwise I will wait before flashing bios.

Thanks again!

Dekal · June 25, 2018, 9:32pm

Where did the microcode come from?

plutomaniac · June 26, 2018, 2:56pm

cpu206A7_plat12_ver0000002E_2018-04-10_PRD_576F65DE

cpu206A7_plat12_ver0000002E_2018-04-10_PRD_576F65DE.rar (12.1 KB)

mictlan · June 26, 2018, 7:08pm

Updated efi with your posted cpu206A7_plat12_ver0000002E_2018-04-10_PRD_576F65DE.
Gets accepted by the efi - microcode update 2E shown in efi!

Thanks!