date:20180220

Re: [coreboot] [off topic] Opteron CPU missing chips on the bottom

2018-02-20 Thread taii...@gmx.com


On 02/20/2018 12:50 PM, Duncan wrote:


Should be noted a number of the 62xx series CPUs appear to have two
capacitors missing, and I've never seen one without these missing - e.g.
https://www.ebay.co.uk/itm/AMD-Opteron-OS6344WKTCGHK-12-Core-Server-CPU-2-6GHz-Socket-G34-115W-Lot-of-2/122838000876?epid=131636979=item1c99b724ec:g:yb0AAOSwU4FaIPU8

Not sure what to think in this case, given the rest of the capacitors
appear entirely intact.


How to tell:
Non-populated pads will have the telltale bright shiny copper contacts, 
whereas the damaged/missing ones will be tarnished and partially 
obscured (by little plastic bits of the chip that got ripped off) etc.


Like tim said, you should ask for high res photos.

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Re: [coreboot] I want to be a contributor (Cloud Dai)

2018-02-20 Thread Elisenda Cuadros


You explained it so well, thank you!


On 20/02/18 20:29, Timothy Pearson wrote:

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

There's a modest single digit performance boost at isoclock, but the
63xx series also has the fastest core you will see in the
owner-controlled x86 world (3.8GHz).  The 62xx tops out at 3.6GHz.

Both are 32nm and completely obsolete by modern standards.  The POWER9
chip for instance will run circles around either one of these, so I'd
say rather than looking for maximum absolute performance at high cost,
go for the 62xx series.  It'll still last you a long time for moderate
computing needs.

On 02/20/2018 01:12 PM, Elisenda Cuadros wrote:

Hello,

Is it really worth 63xx series instead 62xx?

They are _much more_ expensive.

Is there any public benchmark?

Regards,

- Eli


On 20/02/18 10:46, taii...@gmx.com wrote:

On 02/20/2018 01:29 AM, 戴，曉政 via coreboot wrote:


Dear Taiidan,

I have get KGPE-D16 motherboard from auction website but I find that
AMD 6328 CPU is too expensive ($499 USD).  As well as 6386SE CPU is
more expensive than 6328 CPU so please give me a favor. Please list
some cheaper AMD CPUs name that can be built successfully  when I use
KGPE-D16 motherboard to install coreboot.

Right now on ebay I also see a 6328 for $130 and a 6386SE for
$225/best offer (the last and best owner controlled x86-64 CPU, get
one while you can IMO).
https://www.ebay.com/itm/AMD-Opteron-OS6386YETGGHK-16-Core-2-8GHz-16MB-6-4GT-s-Server-CPU/222837140766

This one is in good condition (note the straight as an arrow
capacitors on the bottom with none missing)

FYI don't buy a CPU that has missing bottom capacitors or scratches on
the pads, always ask a seller for a photo of the bottom if you buy a
G34 CPU like the 6386SE.

   I know my English is very poor,

Naah it is fine :]





- -- 
Timothy Pearson

Raptor Engineering
+1 (415) 727-8645 (direct line)
+1 (512) 690-0200 (switchboard)
https://www.raptorengineering.com
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Re: [coreboot] When does AMD release the fam15 spectre microcode updates?

2018-02-20 Thread Piotr Kubaj via coreboot


AFAIK it's not only fam15 that is vulnerable. If you're going to ask, could you 
ask about updates for other CPU's than Ryzen in general? I also have fam14 and 
fam16 boards.

On 18-02-19 12:00:01, coreboot-requ...@coreboot.org wrote:

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Today's Topics:

  1. Re: When does AMD release the fam15 spectre microcode
 updates? (Mike Banon)
  2. Re: When does AMD release the fam15 spectre microcode
 updates? (Rudolf Marek)


--

Message: 1
Date: Sun, 18 Feb 2018 14:48:05 +0300
From: Mike Banon 
To: "taii...@gmx.com" , coreboot@coreboot.org
Subject: Re: [coreboot] When does AMD release the fam15 spectre
microcode updates?
Message-ID:

Content-Type: text/plain; charset="UTF-8"

Maybe its' a good idea to write to AMD support regarding this question
- please share a reply if you would get an answer. I'm curious about
other fam15 CPUs as well, e.g. A10-5750M microcode update would be
nice, maybe a request could be more general, e.g. : what is the
estimated release date for the microcode updates for fam15 AMD CPUs
(so a request is  not about "opterons only")

On Sun, Feb 18, 2018 at 2:47 PM, Mike Banon  wrote:

Maybe its' a good idea to write to AMD support regarding this question
- please share a reply if you would get an answer. I'm curious about
other fam15 CPUs as well, e.g. A10-5750M microcode update would be
nice, maybe a request could be more general, e.g. : what is the
estimated release date for the microcode updates for fam15 AMD CPUs
(so a request is  not about "opterons only")

On Sun, Feb 18, 2018 at 4:30 AM, taii...@gmx.com  wrote:

They said they would be releasing opteron microcode updates in a few weeks
but it has been over a month and I am wondering when this is going to happen
or if it already has and I should re-compile coreboot?

https://www.amd.com/en/corporate/speculative-execution
"We expect to make updates available for our previous generation products
over the coming weeks."

Thanks!


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Message: 2
Date: Sun, 18 Feb 2018 13:03:07 +0100
From: Rudolf Marek 
To: Mike Banon , "taii...@gmx.com"
, coreboot@coreboot.org
Subject: Re: [coreboot] When does AMD release the fam15 spectre
microcode updates?
Message-ID: 
Content-Type: text/plain; charset=iso-8859-2

Hi,

What do you want to protect? If you want to protect the kernel, retpolines are 
OK on AMD.
And you don't need any microcode update. Your CPU needs to have SMEP, otherwise
you would need to clear RSB on CPL change (the paper on mentined page says that 
you need to do that
always, but at least on Ryzen, the attack using RSB is not working (we tried 
that out, maybe it works
only on some circumstances).

If you want to protect userspace, the RSB will be clear by IBPB (which you 
would need if you don't have userspace compiled
with retpolines). I don't know if intel clears RSB on IBPB... probably not

To sum it up on AMD:

kernel:
retpolines, RSB clear on CPL change on CPU without SMEP (see above)

userspace:
retpolines, RSB clear on context switch necessary or IBPB (needs microcode 
update).

Plus make sure you enable "LFENCE is dispatch serializing" - perhaps coreboot 
can do that :) it is simple
MSR write on fam 10h 12h+ the fam 11h and 0fh dont have this MSR but LFENCE is 
dispatch serilizing.

Besides that, you don't need any microcode update.

Plus of course there is a spectre variant 1, which is more difficult to 
mitigate, basically you need to check all the software
and look for any pattern like array_x[array_z[untrusted_index] * any 
transformation].

The first access would leak just address (ASLR defated), second will leak data.
The variant 1 works on user/user attack and as well as user/kernel.

As far I know there are no automated tools to check for this.


Thanks
Rudolf









Dne 18.2.2018 v 12:48 Mike Banon napsal(a):

Maybe its' a good idea to write to AMD support regarding this question
- please share a reply if you would get an answer. I'm curious about
other fam15 CPUs as well, e.g. A10-5750M microcode update would be
nice, maybe a request could be more general,

Re: [coreboot] I want to be a contributor (Cloud Dai)

2018-02-20 Thread Timothy Pearson

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

There's a modest single digit performance boost at isoclock, but the
63xx series also has the fastest core you will see in the
owner-controlled x86 world (3.8GHz).  The 62xx tops out at 3.6GHz.

Both are 32nm and completely obsolete by modern standards.  The POWER9
chip for instance will run circles around either one of these, so I'd
say rather than looking for maximum absolute performance at high cost,
go for the 62xx series.  It'll still last you a long time for moderate
computing needs.

On 02/20/2018 01:12 PM, Elisenda Cuadros wrote:
> Hello,
> 
> Is it really worth 63xx series instead 62xx?
> 
> They are _much more_ expensive.
> 
> Is there any public benchmark?
> 
> Regards,
> 
> - Eli
> 
> 
> On 20/02/18 10:46, taii...@gmx.com wrote:
>> On 02/20/2018 01:29 AM, 戴，曉政 via coreboot wrote:
>>
>>> Dear Taiidan,
>>>
>>> I have get KGPE-D16 motherboard from auction website but I find that
>>> AMD 6328 CPU is too expensive ($499 USD).  As well as 6386SE CPU is
>>> more expensive than 6328 CPU so please give me a favor. Please list
>>> some cheaper AMD CPUs name that can be built successfully  when I use
>>> KGPE-D16 motherboard to install coreboot.
>> Right now on ebay I also see a 6328 for $130 and a 6386SE for
>> $225/best offer (the last and best owner controlled x86-64 CPU, get
>> one while you can IMO).
>> https://www.ebay.com/itm/AMD-Opteron-OS6386YETGGHK-16-Core-2-8GHz-16MB-6-4GT-s-Server-CPU/222837140766
>>
>> This one is in good condition (note the straight as an arrow
>> capacitors on the bottom with none missing)
>>
>> FYI don't buy a CPU that has missing bottom capacitors or scratches on
>> the pads, always ask a seller for a photo of the bottom if you buy a
>> G34 CPU like the 6386SE.
>>>   I know my English is very poor,
>> Naah it is fine :]
>>
> 
> 


- -- 
Timothy Pearson
Raptor Engineering
+1 (415) 727-8645 (direct line)
+1 (512) 690-0200 (switchboard)
https://www.raptorengineering.com
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Re: [coreboot] [off topic] Opteron CPU missing chips on the bottom

2018-02-20 Thread Timothy Pearson

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

On 02/20/2018 11:50 AM, Duncan wrote:
> Hi,
> 
> taii...@gmx.com:
>> On 01/31/2018 02:16 PM, Timothy Pearson wrote:
>>
>>> -BEGIN PGP SIGNED MESSAGE-
>>> Hash: SHA1
>>>
>>> Since you've mentioned the remaining lands are also misaligned, I'd
>>> throw that CPU away.  You currently risk burning out the multiphase
>>> regulator and/or attached peripherals (RAM, PCIe), depending on if the
>>> lands are now misaligned enough to put voltages where they don't belong.
>>>
>>> Those lands are very robust; the only way I can think of to chip off one
>>> or two would be putting the CPU land-side up and dropping something on
>>> it.  For more extensive damage, it's possible the CPU was repeatedly
>>> overheated at some point in the past as well.
>> The expert has spoken!
>> Thanks for the advice all.
>>
>> I will add a section to the wiki about insisting on a bottom photo for
>> used G34 CPU's.
>>
> Should be noted a number of the 62xx series CPUs appear to have two
> capacitors missing, and I've never seen one without these missing - e.g.
> https://www.ebay.co.uk/itm/AMD-Opteron-OS6344WKTCGHK-12-Core-Server-CPU-2-6GHz-Socket-G34-115W-Lot-of-2/122838000876?epid=131636979=item1c99b724ec:g:yb0AAOSwU4FaIPU8
> 
> Not sure what to think in this case, given the rest of the capacitors
> appear entirely intact.
> 

You are correct in that the capacitors on the bottom of the package may
be partially populated from the factory.  Looking for missing capacitors
alone is insufficient to determine if damage has been done; high
resolution photographs of the bottom of the chip are required to see if
pins are chipped off, corroded, if a populated capacitor has broken off
(look for any damage to the pads), etc.

- -- 
Timothy Pearson
Raptor Engineering
+1 (415) 727-8645 (direct line)
+1 (512) 690-0200 (switchboard)
https://www.raptorengineering.com
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Re: [coreboot] I want to be a contributor (Cloud Dai)

2018-02-20 Thread Elisenda Cuadros


Hello,

Is it really worth 63xx series instead 62xx?

They are _much more_ expensive.

Is there any public benchmark?

Regards,

- Eli


On 20/02/18 10:46, taii...@gmx.com wrote:

On 02/20/2018 01:29 AM, 戴，曉政 via coreboot wrote:


Dear Taiidan,

I have get KGPE-D16 motherboard from auction website but I find that 
AMD 6328 CPU is too expensive ($499 USD).  As well as 6386SE CPU is 
more expensive than 6328 CPU so please give me a favor. Please list 
some cheaper AMD CPUs name that can be built successfully  when I use 
KGPE-D16 motherboard to install coreboot.
Right now on ebay I also see a 6328 for $130 and a 6386SE for 
$225/best offer (the last and best owner controlled x86-64 CPU, get 
one while you can IMO).
https://www.ebay.com/itm/AMD-Opteron-OS6386YETGGHK-16-Core-2-8GHz-16MB-6-4GT-s-Server-CPU/222837140766 

This one is in good condition (note the straight as an arrow 
capacitors on the bottom with none missing)


FYI don't buy a CPU that has missing bottom capacitors or scratches on 
the pads, always ask a seller for a photo of the bottom if you buy a 
G34 CPU like the 6386SE.

  I know my English is very poor,

Naah it is fine :]




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Re: [coreboot] [off topic] Opteron CPU missing chips on the bottom

2018-02-20 Thread Duncan

Hi,

taii...@gmx.com:
> On 01/31/2018 02:16 PM, Timothy Pearson wrote:
> 
>> -BEGIN PGP SIGNED MESSAGE-
>> Hash: SHA1
>>
>> Since you've mentioned the remaining lands are also misaligned, I'd
>> throw that CPU away.  You currently risk burning out the multiphase
>> regulator and/or attached peripherals (RAM, PCIe), depending on if the
>> lands are now misaligned enough to put voltages where they don't belong.
>>
>> Those lands are very robust; the only way I can think of to chip off one
>> or two would be putting the CPU land-side up and dropping something on
>> it.  For more extensive damage, it's possible the CPU was repeatedly
>> overheated at some point in the past as well.
> The expert has spoken!
> Thanks for the advice all.
> 
> I will add a section to the wiki about insisting on a bottom photo for
> used G34 CPU's.
> 
Should be noted a number of the 62xx series CPUs appear to have two
capacitors missing, and I've never seen one without these missing - e.g.
https://www.ebay.co.uk/itm/AMD-Opteron-OS6344WKTCGHK-12-Core-Server-CPU-2-6GHz-Socket-G34-115W-Lot-of-2/122838000876?epid=131636979=item1c99b724ec:g:yb0AAOSwU4FaIPU8

Not sure what to think in this case, given the rest of the capacitors
appear entirely intact.

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[coreboot] New Defects reported by Coverity Scan for coreboot

2018-02-20 Thread scan-admin

Hi,

Please find the latest report on new defect(s) introduced to coreboot found 
with Coverity Scan.

24 new defect(s) introduced to coreboot found with Coverity Scan.
14 defect(s), reported by Coverity Scan earlier, were marked fixed in the 
recent build analyzed by Coverity Scan.

New defect(s) Reported-by: Coverity Scan
Showing 20 of 24 defect(s)


** CID 1383919:  Resource leaks  (RESOURCE_LEAK)
/util/cbfstool/partitioned_file.c: 201 in partitioned_file_reopen()



*** CID 1383919:  Resource leaks  (RESOURCE_LEAK)
/util/cbfstool/partitioned_file.c: 201 in partitioned_file_reopen()
195 }
196 
197 const struct fmap_area *fmap_fmap_entry =
198 fmap_find_area(file->fmap, 
SECTION_NAME_FMAP);
199 
200 if (!fmap_fmap_entry)
>>> CID 1383919:  Resource leaks  (RESOURCE_LEAK)
>>> Variable "file" going out of scope leaks the storage it points to.
201 return NULL;
202 
203 if ((long)fmap_fmap_entry->offset != fmap_region_offset) {
204 ERROR("FMAP's '%s' section doesn't point back to FMAP 
start (did something corrupt this file?)\n",
205 
SECTION_NAME_FMAP);
206 partitioned_file_close(file);

** CID 1361275:(TAINTED_SCALAR)
/util/cbfstool/ifwitool.c: 839 in parse_subpart_dir()



*** CID 1361275:(TAINTED_SCALAR)
/util/cbfstool/ifwitool.c: 832 in parse_subpart_dir()
826 memcpy(hdr.name, data + offset, sizeof(hdr.name));
827 offset += sizeof(hdr.name);
828 
829 validate_subpart_dir_without_checksum((struct subpart_dir 
*), name);
830 
831 assert(size > subpart_dir_size());
>>> CID 1361275:(TAINTED_SCALAR)
>>> Passing tainted variable "subpart_dir_size()" to a tainted sink.
832 alloc_buffer(subpart_dir_buf, subpart_dir_size(), "Subpart 
Dir");
833 memcpy(buffer_get(subpart_dir_buf), , 
SUBPART_DIR_HEADER_SIZE);
834 
835 /* Read Subpart Dir entries. */
836 struct subpart_dir *subpart_dir = buffer_get(subpart_dir_buf);
837 struct subpart_dir_entry *e = _dir->e[0];
/util/cbfstool/ifwitool.c: 839 in parse_subpart_dir()
833 memcpy(buffer_get(subpart_dir_buf), , 
SUBPART_DIR_HEADER_SIZE);
834 
835 /* Read Subpart Dir entries. */
836 struct subpart_dir *subpart_dir = buffer_get(subpart_dir_buf);
837 struct subpart_dir_entry *e = _dir->e[0];
838 uint32_t i;
>>> CID 1361275:(TAINTED_SCALAR)
>>> Using tainted variable "hdr.num_entries" as a loop boundary.
839 for (i = 0; i < hdr.num_entries; i++) {
840 memcpy(e[i].name, data + offset, sizeof(e[i].name));
841 offset += sizeof(e[i].name);
842 offset = read_member(data, offset, sizeof(e[i].offset),
843  [i].offset);
844 offset = read_member(data, offset, sizeof(e[i].length),

** CID 1361274:  Insecure data handling  (TAINTED_SCALAR)



*** CID 1361274:  Insecure data handling  (TAINTED_SCALAR)
/util/cbfstool/ifwitool.c: 718 in alloc_bpdt_buffer()
712 {
713 struct bpdt_header bpdt_header;
714 assert((offset + BPDT_HEADER_SIZE) < size);
715 bpdt_read_header((uint8_t *)data + offset, _header, name);
716 
717 /* Buffer to read BPDT header and entries. */
>>> CID 1361274:  Insecure data handling  (TAINTED_SCALAR)
>>> Passing tainted variable "get_bpdt_size(_header)" to a tainted 
>>> sink.
718 alloc_buffer(b, get_bpdt_size(_header), name);
719 
720 struct bpdt *bpdt = buffer_get(b);
721 memcpy(>h, _header, BPDT_HEADER_SIZE);
722 
723 /*

** CID 1361253:  Memory - illegal accesses  (BUFFER_SIZE_WARNING)
/util/cbfstool/ifwitool.c: 1301 in init_subpart_dir_entry()



*** CID 1361253:  Memory - illegal accesses  (BUFFER_SIZE_WARNING)
/util/cbfstool/ifwitool.c: 1301 in init_subpart_dir_entry()
1295 static size_t init_subpart_dir_entry(struct subpart_dir_entry *e,
1296 struct buffer *b, size_t offset)
1297 {
1298memset(e, 0, sizeof(*e));
1299 
1300assert(strlen(b->name) <= sizeof(e->name));
>>> CID 1361253:  Memory - illegal accesses  (BUFFER_SIZE_WARNING)
>>> Calling strncpy with a maximum size argument of 12 bytes on

Re: [coreboot] I want to be a contributor (Cloud Dai)

2018-02-20 Thread taii...@gmx.com


On 02/20/2018 01:29 AM, 戴，曉政 via coreboot wrote:


Dear Taiidan,

I have get KGPE-D16 motherboard from auction website but I find that AMD 6328 
CPU is too expensive ($499 USD).  As well as 6386SE CPU is more expensive than 
6328 CPU so please give me a favor. Please list some cheaper AMD CPUs name that 
can be built successfully  when I use KGPE-D16 motherboard to install coreboot.
Right now on ebay I also see a 6328 for $130 and a 6386SE for $225/best 
offer (the last and best owner controlled x86-64 CPU, get one while you 
can IMO).
https://www.ebay.com/itm/AMD-Opteron-OS6386YETGGHK-16-Core-2-8GHz-16MB-6-4GT-s-Server-CPU/222837140766 

This one is in good condition (note the straight as an arrow capacitors 
on the bottom with none missing)


FYI don't buy a CPU that has missing bottom capacitors or scratches on 
the pads, always ask a seller for a photo of the bottom if you buy a G34 
CPU like the 6386SE.

  I know my English is very poor,

Naah it is fine :]

--
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Re: [coreboot] [off topic] Opteron CPU missing chips on the bottom

Re: [coreboot] I want to be a contributor (Cloud Dai)

Re: [coreboot] When does AMD release the fam15 spectre microcode updates?

Re: [coreboot] I want to be a contributor (Cloud Dai)

Re: [coreboot] [off topic] Opteron CPU missing chips on the bottom

Re: [coreboot] I want to be a contributor (Cloud Dai)

Re: [coreboot] [off topic] Opteron CPU missing chips on the bottom

[coreboot] New Defects reported by Coverity Scan for coreboot

Re: [coreboot] I want to be a contributor (Cloud Dai)

9 matches

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