From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 9B1413C1F31 for ; Tue, 12 May 2026 14:38:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778596701; cv=none; b=th/UYmtAO8psSrf2G4CEc38FJ8pfcjLNyMCHzpmXD5IMRpHvHP/jCWGMmic3YcQbmWxCziJ1LUMicef1n6ZNa8t5Yb2knHR/KdzrbJ91lopxmZyGR3T8y5VrX/5g8Gi79oqr/HR32YpnutkVsd75vEryyqzVWC37Am7QP5MDshg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778596701; c=relaxed/simple; bh=rSXU/QT/5syqTUC8Y8n7TUTzW+fDLj5ueNyOCl83wz0=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=fcyJay3ijsN5yA0Qx7NNepxhl2h6Mncown16UoTi1feFCIT2e7FLFXtDJKZ/eeG/OmYWHDEEVSbuwUj51n8sYnHQq3uH35XL1duopAdUZe4HeawHPuUSmLei9cWOkTMwaVPcT6T+pfhQK1eCE/PgfiB4QMtZva8Xc7UMjyEMUgo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=eYgRNVDz; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="eYgRNVDz" Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 489531691; Tue, 12 May 2026 07:38:13 -0700 (PDT) Received: from arm.com (usa-sjc-mx-foss1.foss.arm.com [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 83DA03F836; Tue, 12 May 2026 07:38:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1778596698; bh=rSXU/QT/5syqTUC8Y8n7TUTzW+fDLj5ueNyOCl83wz0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=eYgRNVDzd5s7doteDmod39vWeBM3TOLwmQAQ9F9OoB8K41KXS/BtxIqYOAzG16uOg OH3xLrYxb2F/M2lQaLBhQ9GLbptOuorMloKGIczCjYRJX2PPfAtHfw/8Ies1JclQUB EI+H05v9XPVY2N+9QPy3AfQbQWI9kUAFUcSHhOmQ= Date: Tue, 12 May 2026 15:38:14 +0100 From: Catalin Marinas To: "Aneesh Kumar K.V (Arm)" Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Greg KH , Jeremy Linton , Jonathan Cameron , Lorenzo Pieralisi , Mark Rutland , Sudeep Holla , Will Deacon , Jonathan Cameron , Suzuki K Poulose Subject: Re: [PATCH v4 2/2] coco: guest: arm64: Drop dummy RSI platform device stub Message-ID: References: <20260427061615.905018-1-aneesh.kumar@kernel.org> <20260427061615.905018-3-aneesh.kumar@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260427061615.905018-3-aneesh.kumar@kernel.org> + Suzuki again On Mon, Apr 27, 2026 at 11:46:15AM +0530, Aneesh Kumar K.V (Arm) wrote: > The SMCCC firmware driver now creates the `arm-smccc` platform device > and also creates the CCA auxiliary devices once the RSI ABI is > discovered. This makes the arch-specific arm64_create_dummy_rsi_dev() > helper redundant. Remove the arm-cca-dev platform device registration > and let the SMCCC probe manage the RSI device. > > systemd match on platform:arm-cca-dev for confidential vm detection [1]. > Losing the platform device registration can break that. Keeping this > removal in its own change makes it easy to revert if that regression > blocks the rollout. > > [1] https://lore.kernel.org/all/4a7d84b2-2ec4-4773-a2d5-7b63d5c683cf@arm.com I wouldn't merge this now given that systemd checks this file. Could we have a symbolic link instead for some time until systemd eventually gets updated (years?). -- Catalin