DPDK patches and discussions
 help / color / mirror / Atom feed
From: Dan Gora <dg@adax.com>
To: dev@dpdk.org
Cc: "David Marchand" <david.marchand@redhat.com>,
	"Jerin Jacob" <jerinjacobk@gmail.com>,
	"Mattias Rönnblom" <mattias.ronnblom@ericsson.com>,
	"Dan Gora" <dg@adax.com>
Subject: [dpdk-dev] [PATCH v3 0/2] eal: choose initial PRNG seed source at runtime
Date: Wed, 22 Apr 2020 15:15:22 -0300	[thread overview]
Message-ID: <20200422181524.18679-1-dg@adax.com> (raw)
In-Reply-To: <20200421195446.1730-1-dg@adax.com>

Hi All,

The following patches updates the rte_random subsystem to dynamically find
the best source of the initial seed to the PRNG at run time.

The first patch enables dynamic checking for the rdseed instruction and
removes the requirement for it on the execution system.  It also ensures
that the code to use the rdseed instruction is generated, even if the host
compilation system does not support it (on x86 systems).

The second patch enables dynamic checking for the getentropy() function
using dlload()/dlsym() to allow the code to use getentropy() if it is
available on the execution system, regardless of whether or not it was
available on the compilation system.

Thanks
Dan

-----
v2:
* Fix patch apply issue.
* dlclose() handle if dlsym() fails in __rte_getentropy().

v3:
* Fix error checking of dlsym() in __rte_getentropy().
* Style changes recommended by Mattias.

Dan Gora (2):
  eal: check for rdseed at run time for random seed
  eal: resolve getentropy at run time for random seed

 config/x86/meson.build             | 11 +++++--
 lib/librte_eal/common/rte_random.c | 53 ++++++++++++++++++++++--------
 lib/librte_eal/meson.build         |  3 --
 mk/rte.cpuflags.mk                 |  9 +++--
 4 files changed, 55 insertions(+), 21 deletions(-)

-- 
2.24.1.425.g7034cd094b


  parent reply	other threads:[~2020-04-22 18:16 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-21 19:54 [dpdk-dev] [PATCH " Dan Gora
2020-04-21 19:54 ` [dpdk-dev] [PATCH 1/2] eal: check for rdseed at run time for random seed Dan Gora
2020-04-22  8:22   ` Mattias Rönnblom
2020-04-21 19:54 ` [dpdk-dev] [PATCH 2/2] eal: resolve getentropy " Dan Gora
2020-04-21 21:03   ` Stephen Hemminger
2020-04-21 21:08     ` Dan Gora
2020-04-22  8:28   ` Mattias Rönnblom
2020-04-22 17:44     ` Dan Gora
2020-04-22 20:14       ` Mattias Rönnblom
2020-04-22 20:35         ` Dan Gora
2020-04-23 10:04           ` Luca Boccassi
2020-04-23 17:38             ` Dan Gora
2020-04-27 12:44               ` Luca Boccassi
2020-04-27 16:57                 ` Dan Gora
2020-04-30  8:41                   ` Luca Boccassi
2020-04-30 20:43                     ` Dan Gora
2020-05-01 10:33                       ` Luca Boccassi
2020-05-01 21:05                         ` Dan Gora
2020-05-04  8:04                           ` Mattias Rönnblom
2020-05-04 14:13                             ` Dan Gora
2020-05-04 14:19                               ` Dan Gora
2020-06-02  5:10                                 ` Dan Gora
2020-06-09 15:37                                   ` Dan Gora
2020-06-10  8:15                                     ` Thomas Monjalon
2020-06-10  8:33                                       ` Luca Boccassi
2023-06-12 15:55                                         ` Stephen Hemminger
2020-06-10  8:07                               ` Thomas Monjalon
2020-04-23 12:36           ` Mattias Rönnblom
2020-04-23 17:27             ` Dan Gora
2020-04-21 20:41 ` [dpdk-dev] [PATCH v2 0/2] eal: choose initial PRNG seed source at runtime Dan Gora
2020-04-21 20:41   ` [dpdk-dev] [PATCH v2 1/2] eal: check for rdseed at run time for random seed Dan Gora
2020-04-21 20:41   ` [dpdk-dev] [PATCH v2 2/2] eal: resolve getentropy " Dan Gora
2020-04-22 18:15 ` Dan Gora [this message]
2020-04-22 18:15   ` [dpdk-dev] [PATCH v3 1/2] eal: check for rdseed " Dan Gora
2020-04-22 18:15   ` [dpdk-dev] [PATCH v3 2/2] eal: resolve getentropy " Dan Gora
2020-04-22 23:42 ` [dpdk-dev] [PATCH v4 0/2] eal: choose initial PRNG seed source at runtime Dan Gora
2020-04-22 23:42   ` [dpdk-dev] [PATCH v4 1/2] eal: check for rdseed at run time for random seed Dan Gora
2020-04-22 23:42   ` [dpdk-dev] [PATCH v4 2/2] eal: emulate glibc getentropy for initial " Dan Gora
2020-04-23  2:39     ` Stephen Hemminger
2020-04-23 17:42       ` Dan Gora
2020-06-29  9:30     ` Mattias Rönnblom
2020-06-29 17:57       ` Dan Gora
2020-06-29 20:57         ` Mattias Rönnblom
2020-06-29  9:32   ` [dpdk-dev] [PATCH v4 0/2] eal: choose initial PRNG seed source at runtime Mattias Rönnblom
2020-06-29 18:01     ` Dan Gora
2020-06-29 18:04       ` Dan Gora
2020-06-29 21:05       ` Mattias Rönnblom
2020-06-29 21:14         ` Dan Gora

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200422181524.18679-1-dg@adax.com \
    --to=dg@adax.com \
    --cc=david.marchand@redhat.com \
    --cc=dev@dpdk.org \
    --cc=jerinjacobk@gmail.com \
    --cc=mattias.ronnblom@ericsson.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).