From: Paolo Abeni <pabeni@redhat.com>
To: mst@redhat.com
Cc: virtualization@lists.linux.dev, eperezma@redhat.com,
kvm@vger.kernel.org, jerinj@marvell.com, ndabilpuram@marvell.com,
schalla@marvell.com, Kommula Shiva Shankar <kshankar@marvell.com>,
netdev@vger.kernel.org, jasowang@redhat.com
Subject: Re: [PATCH net-next ] vdpa: fix caching attributes of MMIO regions by setting them explicitly
Date: Fri, 19 Dec 2025 10:06:16 +0100 [thread overview]
Message-ID: <63de3a12-36bc-45bf-a3e5-89246f4ec73f@redhat.com> (raw)
In-Reply-To: <20251216175918.544641-1-kshankar@marvell.com>
On 12/16/25 6:59 PM, Kommula Shiva Shankar 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@marvell.com>
@Micheal: despite the net-next prefix, I assume this patch will go via
your tree, as it looks unrelated from networking.
Cheers,
Paolo
prev parent reply other threads:[~2025-12-19 9:06 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-16 17:59 [PATCH net-next ] vdpa: fix caching attributes of MMIO regions by setting them explicitly Kommula Shiva Shankar
2025-12-17 1:22 ` Jason Wang
2025-12-19 9:06 ` Paolo Abeni [this message]
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