From: Logan Gunthorpe <logang@deltatee.com>
To: Leon Romanovsky <leon@kernel.org>,
Bjorn Helgaas <bhelgaas@google.com>,
Jonathan Corbet <corbet@lwn.net>,
Shuah Khan <skhan@linuxfoundation.org>,
Alex Williamson <alex@shazbot.org>
Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-doc@vger.kernel.org
Subject: Re: [PATCH 03/13] PCI/P2PDMA: Document the Address Type assumption
Date: Tue, 4 Aug 2026 13:55:13 -0600 [thread overview]
Message-ID: <e7c63c88-e6c9-4788-b772-8903511f07e6@deltatee.com> (raw)
In-Reply-To: <20260802-fix-p2p-acs-v1-3-a7c5eb64fff6@nvidia.com>
On 2026-08-02 09:09, Leon Romanovsky wrote:
> From: Leon Romanovsky <leonro@nvidia.com>
>
> P2PDMA selects a mapping from the ACS controls that govern Requests
> carrying an Untranslated address. PCIe r7.0, sec 6.12.3 routes a Request
> carrying a Translated address directly to the peer whenever ACS Direct
> Translated P2P is enabled, regardless of P2P Request Redirect and P2P
> Egress Control.
>
> An ATS capable client can therefore reach the peer on the direct path
> whichever mapping is selected. Record that assumption.
>
> Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
LGTM
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
next prev parent reply other threads:[~2026-08-04 19:55 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-02 15:09 [PATCH 00/13] PCI/P2PDMA: Fix ACS egress control handling Leon Romanovsky
2026-08-02 15:09 ` [PATCH 01/13] PCI/P2PDMA: Safely terminate ACS redirect lists Leon Romanovsky
2026-08-04 19:49 ` Logan Gunthorpe
2026-08-02 15:09 ` [PATCH 02/13] PCI/P2PDMA: Report ACS ports when the paths share no upstream bridge Leon Romanovsky
2026-08-04 19:52 ` Logan Gunthorpe
2026-08-02 15:09 ` [PATCH 03/13] PCI/P2PDMA: Document the Address Type assumption Leon Romanovsky
2026-08-04 19:55 ` Logan Gunthorpe [this message]
2026-08-02 15:09 ` [PATCH 04/13] PCI: Account for Direct Translated P2P in ACS isolation checks Leon Romanovsky
2026-08-04 20:03 ` Logan Gunthorpe
2026-08-02 15:09 ` [PATCH 05/13] PCI: Add ACS egress control vector accessor Leon Romanovsky
2026-08-04 21:55 ` Logan Gunthorpe
2026-08-02 15:09 ` [PATCH 06/13] PCI: Account for ACS egress control in isolation checks Leon Romanovsky
2026-08-04 21:55 ` Logan Gunthorpe
2026-08-02 15:09 ` [PATCH 07/13] PCI/P2PDMA: Derive peer-to-peer routing from ACS control bits Leon Romanovsky
2026-08-04 21:55 ` Logan Gunthorpe
2026-08-04 21:58 ` Logan Gunthorpe
2026-08-02 15:09 ` [PATCH 08/13] PCI/P2PDMA: Honor ACS egress control vectors Leon Romanovsky
2026-08-04 21:56 ` Logan Gunthorpe
2026-08-02 15:09 ` [PATCH 09/13] PCI/P2PDMA: Document ACS egress control handling Leon Romanovsky
2026-08-04 22:01 ` Logan Gunthorpe
2026-08-05 9:02 ` Leon Romanovsky
2026-08-02 15:09 ` [PATCH 10/13] PCI/P2PDMA: Extract pure ACS routing decision helpers Leon Romanovsky
2026-08-04 22:07 ` Logan Gunthorpe
2026-08-05 9:06 ` Leon Romanovsky
2026-08-02 15:09 ` [PATCH 11/13] PCI/P2PDMA: Add KUnit tests for ACS routing decisions Leon Romanovsky
2026-08-04 22:37 ` Logan Gunthorpe
2026-08-02 15:09 ` [PATCH 12/13] PCI/P2PDMA: Add KUnit coverage for the ACS P2P routing walk Leon Romanovsky
2026-08-04 22:37 ` Logan Gunthorpe
2026-08-02 15:09 ` [PATCH 13/13] PCI: Add KUnit coverage for ACS isolation checks Leon Romanovsky
2026-08-04 22:38 ` Logan Gunthorpe
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