linux-kernel - Re: [PATCH] x86, microcode, AMD: Add support for family 16h processors

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 15 Nov 2012 18:01:22 -0500
From:	Gene Heskett <gheskett@...v.com>
To:	Henrique de Moraes Holschuh <hmh@....eng.br>
Cc:	Boris Ostrovsky <boris.ostrovsky@....com>, hpa@...or.com,
	mingo@...e.hu, tglx@...utronix.de,
	herrmann.der.user@...glemail.com, bp@...en8.de,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86, microcode, AMD: Add support for family 16h processors

On Thursday 15 November 2012, Henrique de Moraes Holschuh wrote:
>On Thu, 15 Nov 2012, Boris Ostrovsky wrote:
>> Add valid patch size for family 16h processors
>> 
>> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@....com>
>
>Is this something that needs to go to -stable ?

IMO, and if I had an oar in this water, yes.  Its been missing since the 
Intel folks started playing with it a couple years back up the log.  I 
have the amd_ucode files in my /lib/firmware tree,

root@...ote:/opt/os9# ls -l /lib/firmware/amd-ucode/
total 76
-rw-r--r-- 1 root root   642 2012-01-17 11:50 INSTALL
-rw-r--r-- 1 root root  9987 2012-01-17 11:50 LICENSE
-rw-r--r-- 1 root root 12404 2012-01-17 11:50 microcode_amd.bin
-rw-r--r-- 1 root root  1526 2012-01-17 11:50 microcode_amd.bin.README
-rw-r--r-- 1 root root  2644 2012-01-17 11:50 microcode_amd_fam15h.bin
-rw-r--r-- 1 root root   510 2012-01-17 11:50 
microcode_amd_fam15h.bin.README
-rw-r--r-- 1 root root  2012 2009-01-20 04:48 microcode_amd.phenom-V83
-rw-r--r-- 1 root root 15020 2012-01-17 11:50 microcode_amd_solaris.bin
-rw-r--r-- 1 root root  1685 2012-01-17 11:50 
microcode_amd_solaris.bin.README
-rw-r--r-- 1 root root  6227 2012-01-17 11:50 README

but I can't recall the last time I saw the code sign in during dmesg.
Old, slow 4 core phenom here.  AMD was forgotten about when the loading 
of it was moved from the kernel options to /etc/init.d/microcode.  For 
an AMD user, that was not a show stopper, but it wasn't a Good Thing(TM) 
either.

>
>>  #define F1XH_MPB_MAX_SIZE 2048
>>  #define F14H_MPB_MAX_SIZE 1824
>>  #define F15H_MPB_MAX_SIZE 4096
>> 
>> +#define F16H_MPB_MAX_SIZE 3458
>> 
>>  	switch (c->x86) {
>> 
>>  	case 0x14:
>> @@ -198,6 +199,9 @@ static unsigned int verify_patch_size(int cpu, u32
>> patch_size,
>> 
>>  	case 0x15:
>>  		max_size = F15H_MPB_MAX_SIZE;
>>  		break;
>> 
>> +	case 0x16:
>> +		max_size = F16H_MPB_MAX_SIZE;
>> +		break;
>> 
>>  	default:
>>  		max_size = F1XH_MPB_MAX_SIZE;
>>  		break;
>
>Because it looks like without this patch, some valid microcode updates
>would be rejected by the kernel...


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)
My web page: <http://coyoteden.dyndns-free.com:85/gene> is up!
Some people's mouths work faster than their brains.  They say things they
haven't even thought of yet.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/