Resurrecting an old thread, pulled out of
http://www.spinics.net/lists/linux-crypto/msg19192.html
On Wed, Apr 20, 2016 at 9:18 AM, Anatoly Pugachev <matorola@xxxxxxxxx>
wrote:
On Wed, Apr 20, 2016 at 1:33 AM, Sowmini Varadhan
<sowmini.varadhan@xxxxxxxxxx> wrote:
Hi Anatoly,
after commit c1e9b3b0eea1 ("hwrng: n2 - Attach on T5/M5, T7/M7 SPARC
CPUs")
I get a *lot* of console noise on my T5-2, of the form:
n2rng f028f21c: Selftest failed on unit 0
n2rng f028f21c: Test buffer slot 0 [0x0000000000000000]
n2rng f028f21c: Test buffer slot 1 [0xe63f56d6a22eb116]
n2rng f028f21c: Test buffer slot 2 [0xe63f56d6a22eb116]
n2rng f028f21c: Test buffer slot 3 [0xe63f56d6a22eb116]
n2rng f028f21c: Test buffer slot 4 [0xe63f56d6a22eb116]
n2rng f028f21c: Test buffer slot 5 [0xe63f56d6a22eb116]
n2rng f028f21c: Test buffer slot 6 [0xe63f56d6a22eb116]
n2rng f028f21c: Test buffer slot 7 [0xe63f56d6a22eb116]
Why/when is your commit needed on my T5-2?
I'm not sure how this was tested, but if you need to revise it and test
on sparc, please let me know- I think it needs more work on sparc.
Sowmini,
the patch/commit is actually quite trivial, it just adds device_id
matches for newer T5/M7 CPUs to n2rng_match structure. Without this
patch, n2rng does not work on this newer CPUs. Works well on my T5-2
LDOM (tested with rng-tools and gpg --gen-key). I don't have M7
^^^^
Anatoly, I think your LDOM is why you don't see the problem. Yes, your
patch works just fine when running in a client LDOM, but we see a
problem when running this on sparc "bare metal". Did you test this on
the bare metal so that the self-test would run?
It seems there's an issue with the self-test in the newer hardware and
the driver will never stop trying to retest the hardware. I'm
contemplating a patch to limit the self-test attempts, at least until we
can figure out what is the root of the issue.
sln
machine to test it with.
Why the n2rng selftest fails on your machine - I've no idea... Just to
silence it, you can blacklist this module, since it does not work your
hardware anyway.
Can you please send me "prtconf -pv" output from your machine, as well
information on how do you run linux as LDOM container or baremetal
T5-2 ?
Mine T5-2 is one of the last firmware releases (run from solaris 11.3
control domain):
root@deimos:/home/sysadmin# prtdiag -v
============================ FW Version ============================
Sun System Firmware 9.5.3 2015/11/25 09:50
sysadmin@deimos:~$ ldm -V
Logical Domains Manager (v 3.3.0.0.17)
Hypervisor control protocol v 1.12
Using Hypervisor MD v 1.4
System PROM:
Hostconfig v. 1.6.3 @(#)Hostconfig 1.6.3 2015/11/25
08:57
Hypervisor v. 1.15.3 @(#)Hypervisor 1.15.3 2015/11/11
17:15
OpenBoot v. 4.38.3 @(#)OpenBoot 4.38.3 2015/11/11
10:38
Can you please check what firmware release if yours T5-2 server and
probably update? I'm not sure it would help, but anyway.
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