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=-2.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=ham 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 F0E7CC43381 for ; Thu, 14 Mar 2019 03:09:39 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (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 6B151206BA for ; Thu, 14 Mar 2019 03:09:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=gibson.dropbear.id.au header.i=@gibson.dropbear.id.au header.b="hyLnCi/+" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6B151206BA Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=gibson.dropbear.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 44KYbP2lXQzDqMp for ; Thu, 14 Mar 2019 14:09:37 +1100 (AEDT) Received: from ozlabs.org (bilbo.ozlabs.org [203.11.71.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 44KYQY19F6zDqLs for ; Thu, 14 Mar 2019 14:01:57 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=gibson.dropbear.id.au Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=gibson.dropbear.id.au header.i=@gibson.dropbear.id.au header.b="hyLnCi/+"; dkim-atps=neutral Received: by ozlabs.org (Postfix, from userid 1007) id 44KYQX47JPz9s7h; Thu, 14 Mar 2019 14:01:56 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1552532516; bh=AmA7h0PF2maHIB2nMzJ2iMkdGPyEuQBSK3lTmGtm6xc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=hyLnCi/+LhN5MIgdgD0FSb0n6eNc3vhMgbkBxaf/K6YlXj5feeqK+1ZWNp4md4Z0M aKz2+DCsfUCags0X7gw1jx2KY6Y2D9XwFjZ7++rkUWLpgOfdYyFUE6PTvbM4ZbYUlA tsUcIcMSpvM+DUFqEYDqgTkJzF5xesdTUhhZ4aHA= Date: Thu, 14 Mar 2019 13:29:21 +1100 From: David Gibson To: =?iso-8859-1?Q?C=E9dric?= Le Goater Subject: Re: [PATCH v2 03/16] KVM: PPC: Book3S HV: XIVE: introduce a new capability KVM_CAP_PPC_IRQ_XIVE Message-ID: <20190314022921.GK8211@umbus.fritz.box> References: <20190222112840.25000-1-clg@kaod.org> <20190222112840.25000-4-clg@kaod.org> <20190225043551.GA20501@blackberry> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="45wMVEkw4XUbiYON" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.11.3 (2019-02-01) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kvm@vger.kernel.org, kvm-ppc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" --45wMVEkw4XUbiYON Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Mar 13, 2019 at 09:34:53AM +0100, C=E9dric Le Goater wrote: > On 2/25/19 5:35 AM, Paul Mackerras wrote: > > On Fri, Feb 22, 2019 at 12:28:27PM +0100, C=E9dric Le Goater wrote: > >> The user interface exposes a new capability to let QEMU connect the > >> vCPU to the XIVE KVM device if required. The capability is only > >> advertised on a PowerNV Hypervisor as support for nested guests > >> (pseries KVM Hypervisor) is not yet available. > >=20 > > If a bisection happened to land on this commit, we would have KVM > > saying it had the ability to support guests using XIVE natively, but > > it wouldn't actually work since we don't have all the code that is in > > the following patches. >=20 > OK. I didn't think migration was a must-have for bisection. I will move > the enablement at end. Any temporary feature regression potentially breaks bisection, because you don't know what we'll want to bisect for. Obviously we're never going to get that perfectly right, but that doesn't mean we shouldn't try when we do see the problem in advance. --=20 David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. 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