From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from ale.deltatee.com (ale.deltatee.com [204.191.154.188]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7A5A63CCA02; Mon, 21 Sep 2026 20:51:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=204.191.154.188 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790023918; cv=none; b=AQEWVITaixkD5Qrl49DbYY0DoKYhptC6KZTKcXTqRhh/+3FyhWud3j3yWW+S0prnFJ9Lw8yWO17shQnE9Y3qt2hD8C8mxzhcy8E6bf3kWydf8/hCG2xUFZI2getW6a1Kw6AVpXRJ+QZyCdDYKWnOgYNBExFJy6tXbahRYJCNfg4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790023918; c=relaxed/simple; bh=1CDELqiiofivXiZl5QErg8K2kh1qvy2PGzpNAH+s/Ak=; h=Message-ID:Date:MIME-Version:To:Cc:References:From:In-Reply-To: Content-Type:Subject; b=E7E1i79wnpbhGwrKd1+8uHSqIsK5zBKgki1dbNL6mSl0/krdeEFfHw8fQObwo6U1Ddomqa8gwdq4NeUnHUnOqMizAHIC6L2G+tpB2NhcT1U9mp58KXNeEUzcQSvRZWExmUBu3jvGTHvJeDLXuWnCHXQWCLKWCeaNRgA8xN6RPLk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=deltatee.com; spf=pass smtp.mailfrom=deltatee.com; dkim=pass (2048-bit key) header.d=deltatee.com header.i=@deltatee.com header.b=X2MF/i4M; arc=none smtp.client-ip=204.191.154.188 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=deltatee.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=deltatee.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=deltatee.com header.i=@deltatee.com header.b="X2MF/i4M" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=deltatee.com; s=20200525; h=Subject:In-Reply-To:From:References:Cc:To: MIME-Version:Date:Message-ID:content-disposition; bh=BpVc1oOlMNPMnv8BG9zWt0tN3zKEilatFXc42t7lFMQ=; b=X2MF/i4M59hS2XH8iC5SkeBMCq UW4T2hxrNk/lFHCJtbIFG03BljH0G1+JThASbEgwqqzeswupAYCkYxdNvSsYljfmHd6nizAKAZEsw uXi7lrUjextbyIn0shF78Kbi4olRNAoeDbF+to0ksD1wdK/xXJoUh3AcHksF9eNxAHaFnqEcbxFEm jLdTfD0ZhDTjjSDnO/KdwrIRcmFtQIz6zsqzlY+ICNdacwJNXqa1hZprAom2PNkTE0LEeuF3eBHOr gMej4EeqHr4Os+wecDS3tXlmZOD+au5N6HrShSzH4Og+s7WH6Q+EUv4TuA/wcc9vF/f2NKac/NgRD 3LIhTFrA==; Received: from guinness.priv.deltatee.com ([172.16.1.162]) by ale.deltatee.com with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.98.2) (envelope-from ) id 1x8kzQ-0000000F4ow-3YlI; Mon, 21 Sep 2026 14:51:53 -0600 Message-ID: Date: Mon, 21 Sep 2026 14:51:50 -0600 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: Leon Romanovsky , Bjorn Helgaas , Chaitanya Kulkarni , Greg Kroah-Hartman , Jens Axboe , Alex Williamson , Ankit Agrawal , Jason Gunthorpe , Jonathan Corbet , Shuah Khan , "Joerg Roedel (AMD)" , Will Deacon , Robin Murphy , Randy Dunlap , Sumit Semwal , =?UTF-8?Q?Christian_K=C3=B6nig?= Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, iommu@lists.linux.dev, Tushar Dave , linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-rdma@vger.kernel.org, kvm@vger.kernel.org References: <20260920-fix-p2p-acs-v4-0-v7-0-ca0828ab697c@nvidia.com> <20260920-fix-p2p-acs-v4-0-v7-10-ca0828ab697c@nvidia.com> Content-Language: en-CA From: Logan Gunthorpe In-Reply-To: <20260920-fix-p2p-acs-v4-0-v7-10-ca0828ab697c@nvidia.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-SA-Exim-Connect-IP: 172.16.1.162 X-SA-Exim-Rcpt-To: leon@kernel.org, bhelgaas@google.com, kch@nvidia.com, gregkh@linuxfoundation.org, axboe@kernel.dk, alex@shazbot.org, ankita@nvidia.com, jgg@ziepe.ca, corbet@lwn.net, skhan@linuxfoundation.org, joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, rdunlap@infradead.org, sumit.semwal@linaro.org, christian.koenig@amd.com, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, iommu@lists.linux.dev, tdave@nvidia.com, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-rdma@vger.kernel.org, kvm@vger.kernel.org X-SA-Exim-Mail-From: logang@deltatee.com X-Spam-Level: Subject: Re: [PATCH v7 10/19] PCI/P2PDMA: Route Translated Requests under Direct Translated P2P X-SA-Exim-Version: 4.2.1 (built Sun, 23 Feb 2025 07:57:16 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) On 2026-09-20 05:41, Leon Romanovsky wrote: > From: Leon Romanovsky > > A Downstream Port with ACS Direct Translated P2P enabled routes a Request > whose Address Type is Translated "to the peer Egress Port without > redirection, regardless of ACS P2P Request Redirect and ACS P2P Egress > Control", per PCIe r7.0 sec 6.12.3. P2PDMA assumes every Request carries an > Untranslated address, so it sends an ATS client through the host bridge > even where the fabric would route it straight to the peer. > > Add PCI_P2PDMA_TLP_TRANSLATED and consult Direct Translated P2P for the > Requests it describes. > > Tested-by: Tushar Dave > Signed-off-by: Leon Romanovsky Looks good to me: Reviewed-by: Logan Gunthorpe