Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755254AbcKJLC7 (ORCPT ); Thu, 10 Nov 2016 06:02:59 -0500 Received: from bombadil.infradead.org ([198.137.202.9]:36022 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755213AbcKJLC6 (ORCPT ); Thu, 10 Nov 2016 06:02:58 -0500 Message-ID: <1478775772.85722.7.camel@infradead.org> Subject: Re: [PATCH] iommu/vt-d: Fix the size calculation of pasid table From: David Woodhouse To: Joerg Roedel Cc: Xunlei Pang , iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Mika Kuoppala Date: Thu, 10 Nov 2016 11:02:52 +0000 In-Reply-To: <20161110104544.GA2078@8bytes.org> References: <1473648551-10025-1-git-send-email-xlpang@redhat.com> <20160919121827.GB3541@8bytes.org> <1476274674.16627.173.camel@infradead.org> <1477829902.4154.9.camel@infradead.org> <20161110104544.GA2078@8bytes.org> Content-Type: multipart/signed; micalg="sha-256"; protocol="application/x-pkcs7-signature"; boundary="=-ZKihukzbnSx4WcrHAr2k" X-Mailer: Evolution 3.20.5 (3.20.5-1.fc24) 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-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 8712 Lines: 137 --=-ZKihukzbnSx4WcrHAr2k Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Thu, 2016-11-10 at 11:45 +0100, Joerg Roedel wrote: > Hi David, >=20 > On Sun, Oct 30, 2016 at 06:18:22AM -0600, David Woodhouse wrote: > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0/* Start at 2 because it's defined as 1^= (1+PSS) */ >=20 > This probably means 2^(1+PSS), right? Or 1 << (1+PSS). Yeah. > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0iommu->pasid_max =3D 2 << ecap_pss(iommu= ->ecap); >=20 > Otherwise the patch looks good. Do you want to send it upstream yourself > or should I pick it up? I'll let it sit in -next for a day or two more once I've fixed the above, then ask Linus to pull it. 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