kernel: padlock: VIA PadLock not detected.

kernel: padlock: VIA PadLock not detected.

[markus reichelt]

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Hi,

I get the following message on a Nehemiah system. Any ideas about
that?

kernel 2.6.16.17 (I tried other stable versions too)

CONFIG_CRYPTO_DEV_PADLOCK=y
CONFIG_CRYPTO_DEV_PADLOCK_AES=y

kernel: CPU0: Centaur VIA Nehemiah stepping 01
kernel: padlock: VIA PadLock not detected

cat /proc/cpuinfo
processor       : 0
vendor_id       : CentaurHauls
cpu family      : 6
model           : 9
model name      : VIA Nehemiah
stepping        : 1
cpu MHz         : 999.663
cache size      : 64 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu de tsc msr cx8 mtrr pge cmov mmx fxsr sse
fxsr_opt
bogomips        : 2002.28


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Re: kernel: padlock: VIA PadLock not detected.

[Adam Jones]

In a futile gesture against entropy, markus reichelt wrote:

> I get the following message on a Nehemiah system. Any ideas about
> that?

> kernel: CPU0: Centaur VIA Nehemiah stepping 01
> kernel: padlock: VIA PadLock not detected
> 
> cat /proc/cpuinfo
[...]
> flags           : fpu de tsc msr cx8 mtrr pge cmov mmx fxsr sse
> fxsr_opt

I believe the padlock support was only added in later steppings of the
Nehemiah core.  My Nehemiah system here supports it:

cat /proc/cpuinfo 
processor       : 0
vendor_id       : CentaurHauls
cpu family      : 6
model           : 9
model name      : VIA Nehemiah
stepping        : 8
cpu MHz         : 997.000
cache size      : 64 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr cx8 sep mtrr pge cmov pat mmx fxsr sse rng rng_en ace ace_en
bogomips        : 2007.25

(Note the rng* and ace* flags)

According to a VIA press release here:
http://www.linuxdevices.com/sponsors/SP2782600871-NS4520757633.html
only stepping 8 or later CPUs support these instructions.
-- 
Adam Jones (adam@yggdrasl.demon.co.uk)(http://www.yggdrasl.demon.co.uk/)
.oO("It's not like it's sigfile fodder or anything..."                 )
PGP public key: http://www.yggdrasl.demon.co.uk/pubkey.asc