netdev - Re: [PATCH net-next ] vdpa: fix caching attributes of MMIO regions by setting them explicitly

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: <CACGkMEvgA-A=aZc06kc1o68Em8AeXmWPeRa-S=ziqWencpSk3Q@mail.gmail.com>
Date: Wed, 17 Dec 2025 09:22:00 +0800
From: Jason Wang <jasowang@...hat.com>
To: Kommula Shiva Shankar <kshankar@...vell.com>
Cc: netdev@...r.kernel.org, mst@...hat.com, virtualization@...ts.linux.dev, 
	eperezma@...hat.com, kvm@...r.kernel.org, jerinj@...vell.com, 
	ndabilpuram@...vell.com, schalla@...vell.com
Subject: Re: [PATCH net-next ] vdpa: fix caching attributes of MMIO regions by
 setting them explicitly

On Wed, Dec 17, 2025 at 1:59 AM Kommula Shiva Shankar
<kshankar@...vell.com> wrote:
>
> Explicitly set non-cached caching attributes for MMIO regions.
> Default write-back mode can cause CPU to cache device memory,
> causing invalid reads and unpredictable behavior.
>
> Invalid read and write issues were observed on ARM64 when mapping the
> notification area to userspace via mmap.
>
> Signed-off-by: Kommula Shiva Shankar <kshankar@...vell.com>
> ---

Acked-by: Jason Wang <jasowang@...hat.com>

Btw, I think this should go with Michael's vhost tree.

Thanks