From: Marc Zyngier <maz@kernel.org>
To: 谢明 <xieming@kylinos.cn>
Cc: <christoffer.dall@arm.com>, <kvmarm@lists.cs.columbia.edu>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>
Subject: Re: 回复: Re: [PATCH] kvm: fix gpu passthrough into vm on arm64
Date: Fri, 25 Mar 2022 13:06:15 +0000 [thread overview]
Message-ID: <87ils25ghk.wl-maz@kernel.org> (raw)
In-Reply-To: <1zpfpvw7azf-1zpgztpmct8@nsmail6.0>
On Fri, 25 Mar 2022 01:06:17 +0000,
谢明 <xieming@kylinos.cn> wrote:
>
> thanks for your reply !
> you are right, 'If the device supports NORMAL_NC, this should
> be known by the host kernel and exposed to KVM'， accordding the kvm
> combining rules on arm64， stage1 is setting to NORMAL_NC， so can
> we add a conditional judement when ioremapping on stage2, if the
> device suppurt NORMAL_NC we setting the memory attribute to
> PAGE_S2_NC ?
The question remains: how do you convey that capability to the host?
There is nothing currently telling KVM what memory type to use.
M.
--
Without deviation from the norm, progress is not possible.
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
parent reply other threads:[~2022-03-25 13:08 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <1zpfpvw7azf-1zpgztpmct8@nsmail6.0>]
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=87ils25ghk.wl-maz@kernel.org \
--to=maz@kernel.org \
--cc=christoffer.dall@arm.com \
--cc=kvmarm@lists.cs.columbia.edu \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=xieming@kylinos.cn \
/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).