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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AD015C433EF for ; Fri, 18 Feb 2022 21:45:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239991AbiBRVpw (ORCPT ); Fri, 18 Feb 2022 16:45:52 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:49526 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235827AbiBRVpv (ORCPT ); Fri, 18 Feb 2022 16:45:51 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 829A425598 for ; Fri, 18 Feb 2022 13:45:33 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.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=de+V2e39uuha1Oc0Rjqsv9bzjSmv/vzpy6jz4ccjv24=; b=bK2FfeBoQJvZkOWsNZ2OdiQnOC lW6k0SS2LaXZd3iwsrvfysegbwsvxHMNf45R66V9takyflY8wlmKXX4yxMRRYUDDUHxNV69+5dN0R n0Nf/z5H/DJpwtIjVkySCgzdjXkjWztkW2qgrZEIwkN5EYuzf9MIxu+fzrMz29hCocaj08VXUdpPK x9MeYCqlUvYnM+z5Ea2aHDTrBlryQFN7apEqmk5EKUmRWCcLMCL0sVgSdHEiIBc6sJ3M3K/pbHXFo UQK+mUTkbum4M91cRdr+McOHnTIffjfZGbpH6k4QusuOSrm5lhyk2hST7G1Bh8t+tQjKQk43ELlcI OmrnBvzw==; Received: from [2001:871:43:aaee:a4a4:c75:bc12:c634] (helo=dynamic-pd01.res.v6.highway.a1.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1nLB41-00GyJL-98; Fri, 18 Feb 2022 21:45:17 +0000 Message-ID: <78bdc903b4d325902cde091afa20e9772373bff9.camel@infradead.org> Subject: Re: [PATCH v0 02/15] KVM: x86/xen: Use gfn_to_pfn_cache for runstate area From: David Woodhouse To: Sean Christopherson Cc: kvm@vger.kernel.org, Paolo Bonzini , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , Joao Martins , Boris Ostrovsky , Metin Kaya , Paul Durrant Date: Fri, 18 Feb 2022 22:45:15 +0100 In-Reply-To: References: <20220210002721.273608-1-dwmw2@infradead.org> <20220210002721.273608-3-dwmw2@infradead.org> Content-Type: multipart/signed; micalg="sha-256"; protocol="application/pkcs7-signature"; boundary="=-AN9F1f9N8cci6wFQSjj7" User-Agent: Evolution 3.36.5-0ubuntu1 MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org --=-AN9F1f9N8cci6wFQSjj7 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Fri, 2022-02-18 at 19:57 +0000, Sean Christopherson wrote: > On Thu, Feb 10, 2022, David Woodhouse wrote: > > From: David Woodhouse >=20 > RFC, or lazy? :-D >=20 The important parts are in place. It needs me to finish the self tests but you don't need that to start heckling it, and I realised after I'd posted it that I also hadn't finished the save/restore of pending oneshot timers, which is now implemented in the version at https://git.infradead.org/users/dwmw2/linux.git/shortlog/refs/heads/xen-evt= chn-kernel > > Signed-off-by: David Woodhouse > > --- > > - r =3D kvm_gfn_to_hva_cache_init(vcpu->kvm, > > + r =3D kvm_gfn_to_pfn_cache_init(vcpu->kvm, > > &vcpu->arch.xen.runstate_cache, > > - data->u.gpa, > > - sizeof(struct vcpu_runstate_info)); > > - if (!r) { > > - vcpu->arch.xen.runstate_set =3D true; > > - } > > + NULL, false, true, data->u.gpa, > > + sizeof(struct vcpu_runstate_info), > > + false); >=20 > Now that I'm all too aware of the subtle importants of @guest_uses_pa and > @kernel_map, before the pfn cache code gains more users, can you slot thi= s in at > the beginning of the series? It'd be quite easy to mess up and pass "fal= se, false" > and completely mishandle cases where the PFN is mapped into the guest. Looks good to me; I'll roll it in. 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