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 102FDC433E0 for ; Mon, 18 May 2020 15:47:34 +0000 (UTC) Received: from silver.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 CFBB720657 for ; Mon, 18 May 2020 15:47:33 +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" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CFBB720657 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id A9A962157D; Mon, 18 May 2020 15:47:33 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 67hFBOiNaJZb; Mon, 18 May 2020 15:47:32 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by silver.osuosl.org (Postfix) with ESMTP id 7721820444; Mon, 18 May 2020 15:47:32 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 5F519C0888; Mon, 18 May 2020 15:47:32 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by lists.linuxfoundation.org (Postfix) with ESMTP id D1593C07FF for ; Mon, 18 May 2020 15:47:25 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id C6E1E21509 for ; Mon, 18 May 2020 15:47:25 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id x8A0oq961i5o for ; Mon, 18 May 2020 15:47:25 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by silver.osuosl.org (Postfix) with ESMTPS id 3105720444 for ; Mon, 18 May 2020 15:47:25 +0000 (UTC) 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 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> 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 Cc: Jean-Philippe Brucker , linux-pci@vger.kernel.org, alex.williamson@redhat.com, iommu@lists.linux-foundation.org, bhelgaas@google.com, will@kernel.org, linux-arm-kernel@lists.infradead.org, robin.murphy@arm.com X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============5993699737660476462==" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" --===============5993699737660476462== Content-Type: multipart/signed; micalg="sha-256"; protocol="application/x-pkcs7-signature"; boundary="=-86rpE83kxk+W3oL7l+9W" --=-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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