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=-2.1 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_2 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 BA31DC433E0 for ; Mon, 18 May 2020 15:47:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9239920657 for ; Mon, 18 May 2020 15:47:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="f7M1CdK3" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727007AbgERPrY (ORCPT ); Mon, 18 May 2020 11:47:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41622 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727005AbgERPrX (ORCPT ); Mon, 18 May 2020 11:47:23 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DB4DCC061A0C for ; Mon, 18 May 2020 08:47:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Mime-Version:Content-Type:References: In-Reply-To:Date:Cc:To:From:Subject:Message-ID:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=IE//AKbUVpwemDwwxicAm0Mjoq3f0B4N9O/2EUXkJSQ=; b=f7M1CdK3QfWuCmcpvwdP+ObfoK L0LJgGw8K93vSivAD20zRD8xCSGldVCXAKlRzxSTfJ1WTrZv3QtnXV8K8+Em2NDXR3y9it4xsBVuL njhBm6V6R+Fe+wOx1FrUEydjxzBbY63juF++AfU1bqS8Uwy/NMt85vPwYIteIpoq/iIVpdwAvydpx OEKKV0OUrY84moDNP9JfE8VhVfdel2qg88gdQsqVtPS8dNbMO0cspFLc6xeodBiEQRT8WTdY9AnUV GB1p3Phzr71hc32QhiA0eyaiZbGshBxTg/lZBAXuA84VLu04LRrArtv4VWpdeDs41m/YozK1o+NLJ 1kjWFzgg==; Received: from 54-240-197-239.amazon.com ([54.240.197.239] helo=u3832b3a9db3152.ant.amazon.com) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jahz8-00025F-Cx; Mon, 18 May 2020 15:47:22 +0000 Message-ID: <3ce5d02db49254e50883224771ffb35cf436845f.camel@infradead.org> Subject: Re: [PATCH 0/4] PCI, iommu: Factor 'untrusted' check for ATS enablement From: David Woodhouse To: "Raj, Ashok" , Christoph Hellwig Cc: Jean-Philippe Brucker , linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, iommu@lists.linux-foundation.org, joro@8bytes.org, bhelgaas@google.com, will@kernel.org, alex.williamson@redhat.com, robin.murphy@arm.com, baolu.lu@linux.intel.com Date: Mon, 18 May 2020 16:47:17 +0100 In-Reply-To: <20200515171948.GC75440@otc-nc-03> References: <20200515104359.1178606-1-jean-philippe@linaro.org> <20200515154351.GA6546@infradead.org> <20200515171948.GC75440@otc-nc-03> Content-Type: multipart/signed; micalg="sha-256"; protocol="application/x-pkcs7-signature"; boundary="=-86rpE83kxk+W3oL7l+9W" X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.2 Mime-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org --=-86rpE83kxk+W3oL7l+9W Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Fri, 2020-05-15 at 10:19 -0700, Raj, Ashok wrote: > Hi Christoph >=20 > On Fri, May 15, 2020 at 08:43:51AM -0700, Christoph Hellwig wrote: > > Can you please lift the untrusted flag into struct device? It really > > isn't a PCI specific concept, and we should not have code poking into > > pci_dev all over the iommu code. >=20 > Just for clarification: All IOMMU's today mostly pertain to only PCI devi= ces > and for devices that aren't PCI like HPET for instance we give a PCI > identifier. Facilities like ATS for instance require the platform to have= =20 > an IOMMU. >=20 > what additional problems does moving this to struct device solve? Even the Intel IOMMU supports ACPI devices for which there is no struct pci_dev; only a B/D/F in the ANDD record indicating which entry in the context table to use. --=-86rpE83kxk+W3oL7l+9W Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCCECow ggUcMIIEBKADAgECAhEA4rtJSHkq7AnpxKUY8ZlYZjANBgkqhkiG9w0BAQsFADCBlzELMAkGA1UE BhMCR0IxGzAZBgNVBAgTEkdyZWF0ZXIgTWFuY2hlc3RlcjEQMA4GA1UEBxMHU2FsZm9yZDEaMBgG A1UEChMRQ09NT0RPIENBIExpbWl0ZWQxPTA7BgNVBAMTNENPTU9ETyBSU0EgQ2xpZW50IEF1dGhl bnRpY2F0aW9uIGFuZCBTZWN1cmUgRW1haWwgQ0EwHhcNMTkwMTAyMDAwMDAwWhcNMjIwMTAxMjM1 OTU5WjAkMSIwIAYJKoZIhvcNAQkBFhNkd213MkBpbmZyYWRlYWQub3JnMIIBIjANBgkqhkiG9w0B AQEFAAOCAQ8AMIIBCgKCAQEAsv3wObLTCbUA7GJqKj9vHGf+Fa+tpkO+ZRVve9EpNsMsfXhvFpb8 RgL8vD+L133wK6csYoDU7zKiAo92FMUWaY1Hy6HqvVr9oevfTV3xhB5rQO1RHJoAfkvhy+wpjo7Q 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