From: sashiko-bot@kernel.org
To: "kai zhang" <zhangkai.cool@gmail.com>
Cc: linux-pci@vger.kernel.org
Subject: Re: [PATCH] PCI/P2PDMA: Add Intel 0x6f00 host bridge to the whitelist
Date: Wed, 07 Oct 2026 14:18:32 +0000 [thread overview]
Message-ID: <sashiko-outbox-163093@kernel.org> (raw)
In-Reply-To: <20261007141558.59852-1-zhangkai.cool@gmail.com>
> For P2P paths routed through a host bridge, the P2PDMA core consults a
> whitelist of known-good hardware. Add Intel 8086:6f00 with
> REQ_SAME_HOST_BRIDGE so the entry permits peers only below the same host
> bridge.
>
> The bridge was tested on a single-socket Intel Xeon E5-2697A v4 system
> with two PCIe GPUs below different Root Ports of the same host bridge.
> Without the whitelist entry, peer access was rejected before a transfer
> was issued. With the entry, 64 MiB peer transfers completed in both
> directions with data integrity verified while the IOMMU used translated
> mode.
>
> Assisted-by: LLM
> Signed-off-by: kai zhang <zhangkai.cool@gmail.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261007141558.59852-1-zhangkai.cool@gmail.com?part=1
next prev parent reply other threads:[~2026-10-07 14:18 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-07 14:15 [PATCH] PCI/P2PDMA: Add Intel 0x6f00 host bridge to the whitelist kai zhang
2026-10-07 14:18 ` sashiko-bot [this message]
2026-10-07 21:59 ` Bjorn Helgaas
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