From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794399366; b=1sHZ4bKzrYGRfcjMn4mCoMouIhn9t/XLa8MAk20T8Q8WDGQmTBTZ/DQXhqXcLSf6oJv+ ExBspPsE8Ulg7mD3NJe42uRlR/0vM6aiKc3OmwhGpFOcRsUlMYBS9fA5jMbWQXCAwm5I1 Aav5Dlu/OoJGgjoFdu+siwyrUUnXw6mzIZPj/VmqTaxIhhfCO+VB5f9t1HA1k60F+RPsf fOKYQ3wE8I/L1OWivo1wBCxdtTkhh0X/gDIwMXI/xcZ9lhwqIwJrIiMenMzB8lHrvm/9j sZMKm6WLfDRIbebp50HHj9mKPY2s7z9M66hTWtqvqM6lBdpqeIKQjKwh5I4TnvXWqoA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794399366; h=Received:DKIM-Signature:Date:From:To:Cc:Subject:Message-ID: References:MIME-Version:Content-Type:Content-Disposition:In-Reply-To; bh=qc1N5Uc+wy8ltC14m/VdOEe2OVJ/DsFDi7Wdu8p3PFI=; b=vbAelOssuEfijUQEXq93I2eCDzdK9pJvpPHIYohIQu23n4GWRg0vBoVhvPHh7D3tYy5C tXDlDhLo+4LtwHK9KMuIzcch6tlEugsJek82I8SIr54FbBgTRmTzmDe5yAsZrIGIlFQjq O97oskrsBznyQ+ZoWKBg/eziDqv7Lc8pa+I926DuJkQkptO20yKQ6UB53EDJLoYp8eila QbpGtEuxlsyzeXgWAk8aOKNecE7RwRWWDYDdYPj7CjnVX+wAC2VBfuL9YG3NGW4CUXsAz l4UHEvRzOZD27vSi9TS4rhpq7rXqrhDZGCB6EbZbQJhR9EGTdHBRe1Q1onRTyeAY6NQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=onlB7k+k; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A74E9606A334; Wed, 11 Nov 2026 12:16:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=onlB7k+k Received: by smtp.kernel.org (Postfix) with ESMTPSA id D2C291F00A05; Wed, 11 Nov 2026 12:16:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794399366; bh=qc1N5Uc+wy8ltC14m/VdOEe2OVJ/DsFDi7Wdu8p3PFI=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=onlB7k+kkABml/t8+gkpZvXlK49IkjHX0Ie3jRPouDS1A37DXNb3sWucYH9w1UmkJ XbuCu4sR7afiwRAvdfhrIkNZqmMAbjVZsOd2YwvLkM0Oja5F5phRdXIVlHZ8Q6u4al wo6iIi7sN/Qln9v5Pm/OlG6P7GoTC+kacdGWaaJjGJePEmUwIu/Du8hFGyKVovLqU7 kHBCtP4zKeQ3IzCrEMOwBcWq9gSg7u38qZkj7SbT1NsgYAMgJ8fnM3buiBS51WY+wP T9rECHE6S532kCq9g6YcpisTsaqIxxuzx88iv4PcnNkIycJDOHa3Ik1ey4T3i2e1J7 /+IZl1Op9qp8A== Date: Wed, 11 Nov 2026 14:16:02 +0200 From: Leon Romanovsky To: Bjorn Helgaas Cc: Logan Gunthorpe , Jason Gunthorpe , "Joerg Roedel (AMD)" , Will Deacon , Robin Murphy , Christian =?iso-8859-1?Q?K=F6nig?= , Thomas =?iso-8859-1?Q?Hellstr=F6m?= , 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, Chaitanya Kulkarni , Greg Kroah-Hartman , Jens Axboe , Alex Williamson , Ankit Agrawal , Jonathan Corbet , Shuah Khan , Randy Dunlap , Sumit Semwal Subject: Re: [PATCH v13 00/19] PCI/P2PDMA: Route peer-to-peer DMA by TLP class Message-ID: <20261111121602.GQ8635@unreal> References: <20261105-fix-p2p-acs-v4-0-v13-0-3dd065907c3b@nvidia.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261105-fix-p2p-acs-v4-0-v13-0-3dd065907c3b@nvidia.com> On Thu, Nov 05, 2026 at 12:04:31PM +0200, Leon Romanovsky wrote: > Punch line for Linus from Jason: > "Enhance detecting if the PCI fabric can support a peer to peer path > by evaluating the full bi-directional fabric path over each of the > three traffic type ACS controls. Expand the number of fabric > configurations where the P2P algorithm makes the correct determination > of support to include non-uniform ACS and situations where translated > takes different routes from untranslated." Bjorn, Just a friendly reminder. Thanks,