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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 45D81CD4851 for ; Tue, 12 May 2026 14:38:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=sKSOC1Vhj3/K1lHMAJqVnEIHAnZb+VZJn1jtizYpufc=; b=39tO06ZOE/TKUF1zrHSNyOPscM S9Wxnq25l6qcCBqglbfk1O5+WrAtGFF1T2dFF4ourFKOBypk0FNke/H3lq5CmRM90SPW5OyJeOQx9 H+V0h5MZE5jq33D+LgxEov5KY3H6gp5cQQAEOJ9Aka7UCPJtxjOTm50VBrs4ph3YpmH5UX0TBTLEP UzjtYgQosdSA19cvvGqfpPIfAs6RL2/B6dsyjB4wR9wKbYjkHskLjHGFdTH3KY36SvCWXtnfliwc+ G0mAQtirKWM6HtKST8KpGOT0jqM8P5rCOqMZ2Dizt6lIZhFcXBO7JtEM1TvUfIg6nStZeeIkG3XVw hK+5RQSw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wMoFc-0000000H3dL-0D88; Tue, 12 May 2026 14:38:24 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wMoFY-0000000H3cK-435J for linux-arm-kernel@lists.infradead.org; Tue, 12 May 2026 14:38:22 +0000 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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260427061615.905018-3-aneesh.kumar@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260512_073821_235106_A6986DD5 X-CRM114-Status: GOOD ( 10.50 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.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