CPU bugs, anyone?

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Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8358
Location: Kraków, Poland

Tomasz Grysztar 01 Mar 2023, 11:06

This time, AMD: https://lkml.org/lkml/2023/2/22/33

Andrew Cooper wrote:

Honestly, this is tame compared to some of the things which get fixed in ucode...

01 Mar 2023, 11:06

Furs

Joined: 04 Mar 2016
Posts: 2561

Furs 01 Mar 2023, 14:26

Scary.

01 Mar 2023, 14:26

I

Joined: 19 May 2022
Posts: 58

I 02 Mar 2023, 00:37

Would be interesting if microcode could be decoded/encoded by 3rd party.

02 Mar 2023, 00:37

sylware

Joined: 23 Oct 2020
Posts: 461
Location: Marseille/France

sylware 02 Mar 2023, 00:39

read the thread... ~ "they are working on worse"...

allright...

02 Mar 2023, 00:39

bitRAKE

Joined: 21 Jul 2003
Posts: 4073
Location: vpcmpistri

bitRAKE 02 Mar 2023, 17:49

I wrote:

Would be interesting if microcode could be decoded/encoded by 3rd party.

Some work has been done in this direction on older processors - I know of nothing modern though.

_________________
¯\(°_o)/¯ “languages are not safe - uses can be” Bjarne Stroustrup

02 Mar 2023, 17:49

sylware

Joined: 23 Oct 2020
Posts: 461
Location: Marseille/France

sylware 02 Mar 2023, 23:45

AMD is going dark on this. No wonder since this thread does suggest there is worse than this bug being work on...

Scary.

02 Mar 2023, 23:45

I

Joined: 19 May 2022
Posts: 58

I 03 Mar 2023, 08:04

@bitRAKE thanks, will take a look. As for older processors, my newest one is around 8 years old now. Laughing

Edit: Interesting with the secret RW opcodes, no MSR 0x1e6 here on Gen 5, maybe something exists but seems like it might be a lot of work to find.

03 Mar 2023, 08:04

DimonSoft

Joined: 03 Mar 2010
Posts: 1228
Location: Belarus

DimonSoft 05 Mar 2023, 00:26

Since, I hope, all of us remember the first messages about Meltdown and Spectre claiming AMD’s processors are not affected while Intel’s ones are affected since 1995, it’s not surprising AMD has equally serious problems. The thief’s hat is on fire.

05 Mar 2023, 00:26

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