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History log of /src/sys/arch/arm/ep93xx/epcomvar.h
RevisionDateAuthorComments
 1.9  21-Nov-2021  skrll PR port-evbarm/40307 options KGDB doesn't work for some evbarm hosts

Apply patch from Lloyd Parkes with some KNF tweaks from me.
 1.8  14-Apr-2015  riastradh Include <sys/rndsource.h> where it is actually used.

I had removed <sys/rnd.h> from files that didn't mention anything of
the rnd(9) API. But they included other files which assumed
<sys/rnd.h> had already been included.
 1.7  27-Oct-2012  chs branches: 1.7.14;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.
 1.6  02-Feb-2012  tls branches: 1.6.6;
Entropy-pool implementation move and cleanup.

1) Move core entropy-pool code and source/sink/sample management code
to sys/kern from sys/dev.

2) Remove use of NRND as test for presence of entropy-pool code throughout
source tree.

3) Remove use of RND_ENABLED in device drivers as microoptimization to
avoid expensive operations on disabled entropy sources; make the
rnd_add calls do this directly so all callers benefit.

4) Fix bug in recent rnd_add_data()/rnd_add_uint32() changes that might
have lead to slight entropy overestimation for some sources.

5) Add new source types for environmental sensors, power sensors, VM
system events, and skew between clocks, with a sample implementation
for each.

ok releng to go in before the branch due to the difficulty of later
pullup (widespread #ifdef removal and moved files). Tested with release
builds on amd64 and evbarm and live testing on amd64.
 1.5  19-Nov-2011  tls branches: 1.5.2;
First step of random number subsystem rework described in
<20111022023242.BA26F14A158@mail.netbsd.org>. This change includes
the following:

An initial cleanup and minor reorganization of the entropy pool
code in sys/dev/rnd.c and sys/dev/rndpool.c. Several bugs are
fixed. Some effort is made to accumulate entropy more quickly at
boot time.

A generic interface, "rndsink", is added, for stream generators to
request that they be re-keyed with good quality entropy from the pool
as soon as it is available.

The arc4random()/arc4randbytes() implementation in libkern is
adjusted to use the rndsink interface for rekeying, which helps
address the problem of low-quality keys at boot time.

An implementation of the FIPS 140-2 statistical tests for random
number generator quality is provided (libkern/rngtest.c). This
is based on Greg Rose's implementation from Qualcomm.

A new random stream generator, nist_ctr_drbg, is provided. It is
based on an implementation of the NIST SP800-90 CTR_DRBG by
Henric Jungheim. This generator users AES in a modified counter
mode to generate a backtracking-resistant random stream.

An abstraction layer, "cprng", is provided for in-kernel consumers
of randomness. The arc4random/arc4randbytes API is deprecated for
in-kernel use. It is replaced by "cprng_strong". The current
cprng_fast implementation wraps the existing arc4random
implementation. The current cprng_strong implementation wraps the
new CTR_DRBG implementation. Both interfaces are rekeyed from
the entropy pool automatically at intervals justifiable from best
current cryptographic practice.

In some quick tests, cprng_fast() is about the same speed as
the old arc4randbytes(), and cprng_strong() is about 20% faster
than rnd_extract_data(). Performance is expected to improve.

The AES code in src/crypto/rijndael is no longer an optional
kernel component, as it is required by cprng_strong, which is
not an optional kernel component.

The entropy pool output is subjected to the rngtest tests at
startup time; if it fails, the system will reboot. There is
approximately a 3/10000 chance of a false positive from these
tests. Entropy pool _input_ from hardware random numbers is
subjected to the rngtest tests at attach time, as well as the
FIPS continuous-output test, to detect bad or stuck hardware
RNGs; if any are detected, they are detached, but the system
continues to run.

A problem with rndctl(8) is fixed -- datastructures with
pointers in arrays are no longer passed to userspace (this
was not a security problem, but rather a major issue for
compat32). A new kernel will require a new rndctl.

The sysctl kern.arandom() and kern.urandom() nodes are hooked
up to the new generators, but the /dev/*random pseudodevices
are not, yet.

Manual pages for the new kernel interfaces are forthcoming.
 1.4  23-Oct-2009  snj branches: 1.4.12;
Switch to a 2 clause license. Approved by joff@ (copyright holder).
 1.3  11-Dec-2005  christos branches: 1.3.80;
merge ktrace-lwp.
 1.2  29-Dec-2004  joff branches: 1.2.4;
improve intr handling behavior in light of the fact that there is no transmit completion irqs on epcom
 1.1  22-Dec-2004  joff ep93xx processor on-chip UART driver
 1.2.4.2  17-Jan-2005  skrll Sync with HEAD.
 1.2.4.1  29-Dec-2004  skrll file epcomvar.h was added on branch ktrace-lwp on 2005-01-17 19:29:12 +0000
 1.3.80.1  11-Mar-2010  yamt sync with head
 1.4.12.2  30-Oct-2012  yamt sync with head
 1.4.12.1  17-Apr-2012  yamt sync with head
 1.5.2.1  18-Feb-2012  mrg merge to -current.
 1.6.6.2  03-Dec-2017  jdolecek update from HEAD
 1.6.6.1  20-Nov-2012  tls Resync to 2012-11-19 00:00:00 UTC
 1.7.14.1  06-Jun-2015  skrll Sync with HEAD

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