DPDK patches and discussions
 help / color / mirror / Atom feed
From: "Boyer, Andrew" <Andrew.Boyer@amd.com>
To: "ruifeng.wang@arm.com" <ruifeng.wang@arm.com>,
	Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>,
	"Yigit, Ferruh" <Ferruh.Yigit@amd.com>,
	Srikanth Yalavarthi <syalavarthi@marvell.com>
Subject: Adding helper function for ARM "dsb st"
Date: Mon, 5 Feb 2024 14:11:57 +0000	[thread overview]
Message-ID: <73E1496A-FA0A-46FB-8E72-FD24B56BEBFD@amd.com> (raw)

I see that cnxk has added inline assembly for the ARM "dsb st" barrier. We, too, would like to add a use of this instruction. Can a helper function be added to the atomics headers?

> drivers/ml/cnxk/cn10k_ml_dev.h:#define dsb_st ({ asm volatile("dsb st" : : : "memory"); })

What would the helper be named, rte_wsb()? I suppose it would be a NOP on all other platforms.

Maybe we could add something for "dmb st" at the same time and get rid of that assembly, too.

Thanks,
Andrew

             reply	other threads:[~2024-02-05 14:12 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-02-05 14:11 Boyer, Andrew [this message]
2024-02-07  3:50 ` Honnappa Nagarahalli

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=73E1496A-FA0A-46FB-8E72-FD24B56BEBFD@amd.com \
    --to=andrew.boyer@amd.com \
    --cc=Ferruh.Yigit@amd.com \
    --cc=dev@dpdk.org \
    --cc=honnappa.nagarahalli@arm.com \
    --cc=ruifeng.wang@arm.com \
    --cc=syalavarthi@marvell.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).