linux-kernel - Re: [RESEND PATCH] cdx: fix driver managed dma support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <2023060533-reseal-glider-11e7@gregkh>
Date:   Mon, 5 Jun 2023 17:22:52 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Nipun Gupta <nipun.gupta@....com>
Cc:     alex.williamson@...hat.com, jgg@...pe.ca,
        linux-kernel@...r.kernel.org, git@....com, harpreet.anand@....com,
        pieter.jansen-van-vuuren@....com, nikhil.agarwal@....com,
        michal.simek@....com
Subject: Re: [RESEND PATCH] cdx: fix driver managed dma support

On Mon, Jun 05, 2023 at 06:40:09PM +0530, Nipun Gupta wrote:
> The devices on cdx could be bound to drivers with the device
> DMA managed by kernel drivers or user-space applications.
> As multiple devices can be placed in the same IOMMU group, the
> DMA on these devices must either be entirely under kernel control
> or userspace control. Fix the CDX bus driver to acknowlege the
> driver_managed_dma flag and call the appropriate iommu APIs.
> 
> Fixes: 2959ab247061 ("cdx: add the cdx bus driver")
> Signed-off-by: Nipun Gupta <nipun.gupta@....com>
> Reported-by: Alex Williamson <alex.williamson@...hat.com>
> Closes: https://lore.kernel.org/lkml/20230524134831.28dc97e2.alex.williamson@redhat.com/
> ---
> 
> I have resend this patch to include fixes, closes and
> reported by tags. We request that this fix be incorporated
> into the 6.4 release, along with the inclusion of CDX bus
> driver support.

What do you mean by "inclusion of CDX bus driver support"?  What patches
exactly?

confused,

greg k-h