mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: Heyi Guo <guoheyi@huawei.com>
To: <linux-kernel@vger.kernel.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>,
	Christoffer Dall <christoffer.dall@arm.com>,
	wanghaibin 00208455 <wanghaibin.wang@huawei.com>
Subject: Why do we mark vpending table as non-shareable in GICR_VPENDBASER?
Date: Thu, 9 May 2019 15:10:09 +0800	[thread overview]
Message-ID: <fbee07c9-ec3b-d443-2132-7208dae38539@huawei.com> (raw)

Hi Marc,

We can see in its_vpe_schedule() the shareability bits of GICR_VPENDBASER are set as non-shareable, But we set physical PENDBASER as inner-shareable. Is there any special reason for doing this? If it is because the vpending table is GICR specific, why don't we do the same for physical pending table?

We have not seen function issue with this setting, but a special detector in our hardware warns us that there are non-shareable requests sent out while some inner shareable cache entries still present in the cache, and it may cause data inconsistent.

Thanks,

Heyi



             reply	other threads:[~2019-05-09  7:10 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-09  7:10 Heyi Guo [this message]
2019-05-09  7:58 ` Marc Zyngier
2019-05-09  8:56   ` Heyi Guo
2019-05-09 12:05   ` Heyi Guo

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=fbee07c9-ec3b-d443-2132-7208dae38539@huawei.com \
    --to=guoheyi@huawei.com \
    --cc=christoffer.dall@arm.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=marc.zyngier@arm.com \
    --cc=wanghaibin.wang@huawei.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
all inboxes | Powered by JetHome®