From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D79D1C5DF97 for ; Wed, 26 Aug 2026 09:32:29 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0A65F10E276; Wed, 26 Aug 2026 09:32:29 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="cmU5UCZu"; dkim-atps=neutral Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by gabe.freedesktop.org (Postfix) with ESMTPS id BB77A10E276 for ; Wed, 26 Aug 2026 09:32:27 +0000 (UTC) Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 3D480600C4; Wed, 26 Aug 2026 09:32:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5C58D1F000E9; Wed, 26 Aug 2026 09:32:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1787736746; bh=2PHccR8xyLrnPaFs3pmGnj/EtIQOtajP2CR1wKuYah0=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=cmU5UCZuSb7me/V2S3DfVzH7U9aH4L6RsZOy2YhwofeGMdeBaoMf/quLEmPJ+urTF We3rCO4fPP8qRTmsH1oAJ70JXjBkNGHqBrtscRFoqm9rD8FomT7Dl5JiDVF3sKELJo IKfiGesxOyxBU7Y/W77pZ3+yavy7OR8Z6f98nxrNY+Q+IosEuckgSjCO2ALk5/oVxf 1ow62XN1JC/P5nF8cUn52lZEH6/RJmAgSlyu2u7FMpScnXQ/kbNWjDe44LMOlHfYCq rukqHgRrOOUBrg3F7UJABiezj4u6gt+akQDgmrMsRHEev/J/x0hYAyqETiaJWWWaYf Lx0JaJfXA0ecA== Date: Wed, 26 Aug 2026 12:32:22 +0300 From: Leon Romanovsky To: Konstantin Sinyuk Cc: dri-devel@lists.freedesktop.org, Maarten Lankhorst , Francois Dugast , David Airlie , Simona Vetter , Maxime Ripard , Thomas Zimmermann , Jonathan Corbet , Shuah Khan , Donald Hunter , Jakub Kicinski , "David S. Miller" , Eric Dumazet , Paolo Abeni , Simon Horman , Ilia Levi , Rodrigo Vivi , linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH 0/12] drm/fabric: vendor-neutral topology infrastructure for scale-up accelerator interconnects Message-ID: <20260826093222.GC42790@unreal> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Mon, Aug 24, 2026 at 11:09:28AM +0300, Konstantin Sinyuk wrote: > Modern GPUs and AI accelerators are increasingly connected through scale-up > fabrics such as AMD xGMI today and emerging UALink systems [4]. Linux lacks > common, vendor-neutral infrastructure for reporting which accelerators are > directly connected, through which ports, and in what state. <...> > No production provider is included. Shipping only the synthetic provider is > deliberate, allowing the object model and uAPI to be reviewed before being > tied to hardware. Tell your AI that this is not how things work in the real world. The chances of multiple hardware implementations fitting a software model designed without considering the actual hardware are effectively zero. This is why successful subsystems have emerged from consolidating support for multiple existing hardware implementations. Thanks