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 C3003CA5FFB for ; Mon, 19 Jan 2026 07:52:36 +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:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=sRVp7dUbSthmOrlglJ6TGdqGPUk+uDvjIluK+KIJt6U=; b=3q0701Upo6TnKQX0pUEHDBVIaY hbZJVIiSpRisSd0OKgW+Kuz/e5uN0LF9ATWC/3zkzhFRhb7ipAd2sYjb3jCpjqFYvORKoGwTe1/Ps bmiIJF9LgsDFYUYGgi+sxMZVREYHJEiE+Oa2Qr0+Hof7Mw7fcjrKJv4e7M0WSf22Htyv8fL4AubZQ uSPa5GQ5PFXlm3Xa2J2b7xUcYs5rj8oKegS4uRwecjokxPer30l+nae3+TmILtMSdKn3sweeycGxN n6QXcNVpsd+XExeTACTEmon/KtZkf8alYvreWIf7H2JTtdGbcEUBBxQQq/mMaibXjh5cJF2m6sn5K QCzixAWg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vhk3k-00000001WWp-3iLW; Mon, 19 Jan 2026 07:52:24 +0000 Received: from sender4-pp-f112.zoho.com ([136.143.188.112]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vhk3i-00000001WWO-24Vh; Mon, 19 Jan 2026 07:52:23 +0000 ARC-Seal: i=1; a=rsa-sha256; t=1768809116; cv=none; d=zohomail.com; s=zohoarc; b=mzO0Shua/4atpUZeelS+ZQgvhxd/sOj/CdGT2JvtNeMdrVbhkDqiCS9/tV7FnuOgtAzsXgyTW6M+6SNLwsDsYzWs40xNLw32yj/UTaxF4oZ1vAkndP2vw1tPY7HYFoRntFpdk+Dc1ozUeSOyAbUUqDa14TNU1nR+g4DTDNJSJRQ= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1768809116; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:Subject:To:To:Message-Id:Reply-To; bh=sRVp7dUbSthmOrlglJ6TGdqGPUk+uDvjIluK+KIJt6U=; b=Hg/H46awInmh+1qx1wTLEihLOvryH7prxxthG9krTpP3W0tQSKdVc7E6BYEUNGCMzGkQghlgShPPLUzjz1/Ne+k8E+x32Yeev159MNkb8bGycTxgxCrfIHr7IF4AnoFDVKeJCKubc+sPePuqGbupQKROO4PorFB52mtssMAiJgo= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=benjamin.gaignard@collabora.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1768809116; s=zohomail; d=collabora.com; i=benjamin.gaignard@collabora.com; h=Message-ID:Date:Date:MIME-Version:Subject:Subject:To:To:Cc:Cc:References:From:From:In-Reply-To:Content-Type:Content-Transfer-Encoding:Message-Id:Reply-To; bh=sRVp7dUbSthmOrlglJ6TGdqGPUk+uDvjIluK+KIJt6U=; b=LZ53M/g2B/lEi3Cw4XEq9FXGeHNwxs2mhesW0QOopdjdonaDtdoNwyxYVDQyoI0b 6BP6qBItIYHg9DTgr4WdGf/GFsAmbWXc7txbco0MHXDt7+DZQ95SrCATlZE4vgGrA01 CUZRUw3KPoT6CERFiPBpj2qltx4GApoQblEaUIRU= Received: by mx.zohomail.com with SMTPS id 1768809113865738.6117525224621; Sun, 18 Jan 2026 23:51:53 -0800 (PST) Message-ID: <1030ddab-6124-414d-958f-c461c19bdbb0@collabora.com> Date: Mon, 19 Jan 2026 08:51:46 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v11 3/7] iommu: Add verisilicon IOMMU driver To: =?UTF-8?B?SsO2cmcgUsO2ZGVs?= , Will Deacon Cc: robin.murphy@arm.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, heiko@sntech.de, nicolas.dufresne@collabora.com, p.zabel@pengutronix.de, mchehab@kernel.org, iommu@lists.linux.dev, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-media@vger.kernel.org, kernel@collabora.com References: <20260107101005.84039-1-benjamin.gaignard@collabora.com> <20260107101005.84039-4-benjamin.gaignard@collabora.com> Content-Language: en-US From: Benjamin Gaignard In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260118_235222_606569_C879FA17 X-CRM114-Status: GOOD ( 13.05 ) 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 Le 18/01/2026 à 10:41, Jörg Rödel a écrit : > Benjamin, > > On Tue, Jan 13, 2026 at 04:10:51PM +0000, Will Deacon wrote: >> I took another look at this to see whether it had changed significantly >> from v6 when compared to the rockchip driver. Sadly, they still look >> very similar to me and I continue to suspect that the hardware is a >> derivative. I really don't understand why having a shared implementation >> of the default domain ops is difficult or controversial. Have you tried >> to write it? > When updating for v12, can you please put an explanatory comment at the top of > the file explaining the relationship of the IP this driver is for to the > RockChip IOMMU and the rationale for having it as a separate driver? I want > this part of the discussion documented in the code in case it comes up again. I have already send v12 where I have removed the useless function. Regards, Benjamin > > > -Joerg >