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 X-Spam-Level: X-Spam-Status: No, score=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 05EC9C4743E for ; Sat, 5 Jun 2021 12:29:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D8A9C610A2 for ; Sat, 5 Jun 2021 12:29:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230019AbhFEMa7 (ORCPT ); Sat, 5 Jun 2021 08:30:59 -0400 Received: from new2-smtp.messagingengine.com ([66.111.4.224]:53923 "EHLO new2-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229902AbhFEMa6 (ORCPT ); Sat, 5 Jun 2021 08:30:58 -0400 Received: from compute3.internal (compute3.nyi.internal [10.202.2.43]) by mailnew.nyi.internal (Postfix) with ESMTP id 3E26D5804A2; Sat, 5 Jun 2021 08:29:10 -0400 (EDT) Received: from imap21 ([10.202.2.71]) by compute3.internal (MEProxy); Sat, 05 Jun 2021 08:29:10 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=svenpeter.dev; h=mime-version:message-id:in-reply-to:references:date:from:to :cc:subject:content-type:content-transfer-encoding; s=fm1; bh=1R bQgq677nj7G3MUumWQjelLqbrdkBM2pt/CFGcdDww=; b=IWPbj+jS3yyI1hVyW5 5sN1YgyHOAAM6fqrk2zzGemytyt9Y3iPjsLueBl2TBunTetDC5YbPeGP9y681UJZ 0k39tUpGZjoiwtDxSXs3VNq+qyspKPfIwoVGz8Sy/zVqp+elJ8Q7TpWLcagAfzTG Fl2uhYittvM3zHEWKL6nrG+tY+pyy/9t6iNUwpaPkiYMHZN0LrN9YR8MxzTBo9ks kh9JYRUCbjEUPOv9tcBfmvICu690LGywZIq8K0jM+D91SCSt1EYv65huFmOYg+30 cFj11jFs5i3ieoJWrjeSERdBJ1s88ukANXH/1BYjic7uA3b/KO6/JbhtI+hgbNgw Y5ag== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:content-type :date:from:in-reply-to:message-id:mime-version:references :subject:to:x-me-proxy:x-me-proxy:x-me-sender:x-me-sender :x-sasl-enc; s=fm3; bh=1RbQgq677nj7G3MUumWQjelLqbrdkBM2pt/CFGcdD ww=; b=ADM+zxMegh80UeqCKmGjOf/Ocfu3mACp0SHiArW5qzrB2UqrIe+7He8GL CMuL7ZIHXeyUjBISAuo3oZ6RxK/k4QIzexC9QyF0ty+ERyD0lAFZKeTvZYCIHHut zHY0MMM5x6LtZoUHPVCBHZxljMhWK3s1TgZt6aXDewrd7w24MwAWntciDl92O3Bf ctxryzULFb8rbi3zEoklA2O0VbBHGPip7rnooYhB1EktosG+U+aaKI5mNa5GWErV VWKKPulJc8i/JLr0cUe+wnIk/NOsjDPOS2B/G8mMRyonIf9itbQouiIfZWaRwLfD 5I4G0bX8ilWu4IbaMmcFgfyMJFTWw== X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduledrfedtfedgheefucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhepofgfggfkjghffffhvffutgfgsehtqhertderreejnecuhfhrohhmpedfufhv vghnucfrvghtvghrfdcuoehsvhgvnhesshhvvghnphgvthgvrhdruggvvheqnecuggftrf grthhtvghrnhepteeuudelteefueelvdelheehieevvdfhkeehjeejudfhieelffffudfh keeileegnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehmrghilhhfrhhomh epshhvvghnsehsvhgvnhhpvghtvghrrdguvghv X-ME-Proxy: Received: by mailuser.nyi.internal (Postfix, from userid 501) id E519451C0060; Sat, 5 Jun 2021 08:29:06 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface User-Agent: Cyrus-JMAP/3.5.0-alpha0-519-g27a961944e-fm-20210531.001-g27a96194 Mime-Version: 1.0 Message-Id: <89b391d1-c076-491a-97c0-d08593c006e7@www.fastmail.com> In-Reply-To: References: <20210603085003.50465-1-sven@svenpeter.dev> <20210603085003.50465-4-sven@svenpeter.dev> Date: Sat, 05 Jun 2021 14:28:27 +0200 From: "Sven Peter" To: "Rouven Czerwinski" , "Will Deacon" , "Robin Murphy" , "Joerg Roedel" , "Rob Herring" Cc: "Arnd Bergmann" , devicetree@vger.kernel.org, "Hector Martin" , linux-kernel@vger.kernel.org, "Marc Zyngier" , "Mohamed Mediouni" , "Stan Skowronek" , linux-arm-kernel@lists.infradead.org, "Mark Kettenis" , "Petr Mladek via iommu" , "Alexander Graf" Subject: Re: [PATCH v3 3/3] iommu: dart: Add DART iommu driver Content-Type: text/plain;charset=utf-8 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Rouven, On Sat, Jun 5, 2021, at 13:50, Rouven Czerwinski wrote: > Hi Sven, >=20 > just a small comment, see inline. >=20 > On Thu, 2021-06-03 at 10:50 +0200, Sven Peter wrote: > > + > > +/* must be called with held dart_domain->lock */ >=20 > You can remove this comment, include lockdep.h and=E2=80=A6 >=20 > > +static int apple_dart_finalize_domain(struct iommu_domain *domain) > > +{ > > + struct apple_dart_domain *dart_domain =3D to_dart_domain(domain); > > + struct apple_dart *dart =3D dart_domain->dart; > > + struct io_pgtable_cfg pgtbl_cfg; > > + >=20 > lockdep_assert_held(&dart_domain->lock); >=20 > A lockdep enabled kernel will warn if this function is called without > the lock held, otherwise this gets optimized out. Same for the similar= > comments below. >=20 That looks very useful, thanks! Will use it for v4. I only found assert_spin_locked originally but didn't want to have that performance overhead for code that (I hope :-)) correctly uses these fun= ctions with a held lock right now. Thanks, Sven 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 X-Spam-Level: X-Spam-Status: No, score=-3.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C0167C47082 for ; Sat, 5 Jun 2021 12:29:23 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5D828613F9 for ; Sat, 5 Jun 2021 12:29:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5D828613F9 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lists.linux-foundation.org Authentication-Results: mail.kernel.org; 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Sat, 5 Jun 2021 08:29:06 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface User-Agent: Cyrus-JMAP/3.5.0-alpha0-519-g27a961944e-fm-20210531.001-g27a96194 Mime-Version: 1.0 Message-Id: <89b391d1-c076-491a-97c0-d08593c006e7@www.fastmail.com> In-Reply-To: References: <20210603085003.50465-1-sven@svenpeter.dev> <20210603085003.50465-4-sven@svenpeter.dev> Date: Sat, 05 Jun 2021 14:28:27 +0200 From: "Sven Peter" To: "Rouven Czerwinski" , "Will Deacon" , "Robin Murphy" , "Joerg Roedel" , "Rob Herring" Cc: "Arnd Bergmann" , devicetree@vger.kernel.org, "Hector Martin" , linux-kernel@vger.kernel.org, "Marc Zyngier" , "Mohamed Mediouni" , "Stan Skowronek" , linux-arm-kernel@lists.infradead.org, "Mark Kettenis" , "Petr Mladek via iommu" , "Alexander Graf" Subject: Re: [PATCH v3 3/3] iommu: dart: Add DART iommu driver X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210605_052911_464489_E5B0A7A0 X-CRM114-Status: GOOD ( 12.17 ) 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: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org SGkgUm91dmVuLAoKT24gU2F0LCBKdW4gNSwgMjAyMSwgYXQgMTM6NTAsIFJvdXZlbiBDemVyd2lu c2tpIHdyb3RlOgo+IEhpIFN2ZW4sCj4gCj4ganVzdCBhIHNtYWxsIGNvbW1lbnQsIHNlZSBpbmxp bmUuCj4gCj4gT24gVGh1LCAyMDIxLTA2LTAzIGF0IDEwOjUwICswMjAwLCBTdmVuIFBldGVyIHdy b3RlOgo+ID4gKwo+ID4gKy8qIG11c3QgYmUgY2FsbGVkIHdpdGggaGVsZCBkYXJ0X2RvbWFpbi0+ bG9jayAqLwo+IAo+IFlvdSBjYW4gcmVtb3ZlIHRoaXMgY29tbWVudCwgaW5jbHVkZSBsb2NrZGVw LmggYW5k4oCmCj4gCj4gPiArc3RhdGljIGludCBhcHBsZV9kYXJ0X2ZpbmFsaXplX2RvbWFpbihz dHJ1Y3QgaW9tbXVfZG9tYWluICpkb21haW4pCj4gPiArewo+ID4gKwlzdHJ1Y3QgYXBwbGVfZGFy dF9kb21haW4gKmRhcnRfZG9tYWluID0gdG9fZGFydF9kb21haW4oZG9tYWluKTsKPiA+ICsJc3Ry dWN0IGFwcGxlX2RhcnQgKmRhcnQgPSBkYXJ0X2RvbWFpbi0+ZGFydDsKPiA+ICsJc3RydWN0IGlv X3BndGFibGVfY2ZnIHBndGJsX2NmZzsKPiA+ICsKPiAKPiAJbG9ja2RlcF9hc3NlcnRfaGVsZCgm ZGFydF9kb21haW4tPmxvY2spOwo+IAo+IEEgbG9ja2RlcCBlbmFibGVkIGtlcm5lbCB3aWxsIHdh cm4gaWYgdGhpcyBmdW5jdGlvbiBpcyBjYWxsZWQgd2l0aG91dAo+IHRoZSBsb2NrIGhlbGQsIG90 aGVyd2lzZSB0aGlzIGdldHMgb3B0aW1pemVkIG91dC4gU2FtZSBmb3IgdGhlIHNpbWlsYXIKPiBj b21tZW50cyBiZWxvdy4KPiAKClRoYXQgbG9va3MgdmVyeSB1c2VmdWwsIHRoYW5rcyEgV2lsbCB1 c2UgaXQgZm9yIHY0LgoKSSBvbmx5IGZvdW5kIGFzc2VydF9zcGluX2xvY2tlZCBvcmlnaW5hbGx5 IGJ1dCBkaWRuJ3Qgd2FudCB0byBoYXZlIHRoYXQKcGVyZm9ybWFuY2Ugb3ZlcmhlYWQgZm9yIGNv ZGUgdGhhdCAoSSBob3BlIDotKSkgY29ycmVjdGx5IHVzZXMgdGhlc2UgZnVuY3Rpb25zCndpdGgg YSBoZWxkIGxvY2sgcmlnaHQgbm93LgoKClRoYW5rcywKCgpTdmVuCgoKX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGludXgtYXJtLWtlcm5lbCBtYWlsaW5n IGxpc3QKbGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5p bmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYXJtLWtlcm5lbAo=