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 924E8C433FE for ; Fri, 24 Dec 2021 04:26:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245653AbhLXE0k (ORCPT ); Thu, 23 Dec 2021 23:26:40 -0500 Received: from mga02.intel.com ([134.134.136.20]:40249 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229752AbhLXE0j (ORCPT ); Thu, 23 Dec 2021 23:26:39 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1640319999; x=1671855999; h=date:from:to:cc:subject:message-id:reply-to:references: mime-version:in-reply-to; bh=XVICpTcj5dklnFFnMTQIYshv6lyZmXqWiuOZMigDHD4=; b=XrCFEYcODreSC2ByYZGGZU5TaNJn+a3POjvTrQrMIBxMyaCJpPYYYZNy F0tcMsTI1w+AiT1lLuzoQcdnWalZ4GEySKYmWOh0tHWBdVDsti3xWVjWf 9vWawJfpNTOI9L2ze0Uykn/C/HHZma5etjwMEOCFfGRFtfSc0sX6paLeb pdIHt6+2eyEAJWsTChbN5CPJ7qqwPKL0Za9olyL40YWmA0AEz4ptQM/Zv G34jL2nDoHyRtU+UZK7sEFT/NcNuP9TWnGKGXv/hKRymZUyHpdl26ziDZ RPaDlsOh4BMyjKE/gZ+pfTS6KfPTIl3CxoaRJI2LEFzn1BjpsWJS6qEvm g==; X-IronPort-AV: E=McAfee;i="6200,9189,10207"; a="228226524" X-IronPort-AV: E=Sophos;i="5.88,231,1635231600"; d="scan'208";a="228226524" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Dec 2021 20:26:39 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.88,231,1635231600"; d="scan'208";a="664767253" Received: from chaop.bj.intel.com (HELO localhost) ([10.240.192.101]) by fmsmga001.fm.intel.com with ESMTP; 23 Dec 2021 20:26:31 -0800 Date: Fri, 24 Dec 2021 12:25:54 +0800 From: Chao Peng To: Paolo Bonzini Cc: Sean Christopherson , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, qemu-devel@nongnu.org, Jonathan Corbet , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H . Peter Anvin" , Hugh Dickins , Jeff Layton , "J . Bruce Fields" , Andrew Morton , Yu Zhang , "Kirill A . Shutemov" , luto@kernel.org, john.ji@intel.com, susie.li@intel.com, jun.nakajima@intel.com, dave.hansen@intel.com, ak@linux.intel.com, david@redhat.com Subject: Re: [PATCH v3 kvm/queue 06/16] KVM: Implement fd-based memory using MEMFD_OPS interfaces Message-ID: <20211224042554.GD44042@chaop.bj.intel.com> Reply-To: Chao Peng References: <20211223123011.41044-1-chao.p.peng@linux.intel.com> <20211223123011.41044-7-chao.p.peng@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Fri, Dec 24, 2021 at 12:09:47AM +0100, Paolo Bonzini wrote: > On 12/23/21 19:34, Sean Christopherson wrote: > > > select HAVE_KVM_PM_NOTIFIER if PM > > > + select MEMFD_OPS > > MEMFD_OPS is a weird Kconfig name given that it's not just memfd() that can > > implement the ops. > > > > Or, it's kvm that implements them to talk to memfd? The only thing is VFIO may also use the same set of callbacks, as discussed in the v2. But I think that's fine. Chao > > Paolo 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A87E4C433F5 for ; Fri, 24 Dec 2021 04:28:23 +0000 (UTC) Received: from localhost ([::1]:34928 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1n0cBq-0004QA-IN for qemu-devel@archiver.kernel.org; Thu, 23 Dec 2021 23:28:22 -0500 Received: from eggs.gnu.org ([209.51.188.92]:40720) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1n0cAI-0003et-J4 for qemu-devel@nongnu.org; Thu, 23 Dec 2021 23:26:46 -0500 Received: from mga12.intel.com ([192.55.52.136]:35671) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1n0cAC-0003aG-9R for qemu-devel@nongnu.org; Thu, 23 Dec 2021 23:26:46 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1640320000; x=1671856000; h=date:from:to:cc:subject:message-id:reply-to:references: mime-version:in-reply-to; bh=XVICpTcj5dklnFFnMTQIYshv6lyZmXqWiuOZMigDHD4=; b=mNX99f7CvvLWvwDhHFXkSyyOWKxJ+lRHUpvW6Yxcc99C95pyjbP8BWY/ eNnOgh2ijbBv409qxv6yngT8LneT1VyHHw3Ao/9k9GfyR25Wc23P50NLd aLXfRUDce1H5Oe7NJjVCco2lCdz2oK+4UhjzYHY8GSttHPN1JYcT7QE3R f1g5dE53Wm52yuN7al6OurrggMwKg9oXg88fY1y7LyETMvRwm8hgfF37w ZqK5a8i9trCkgkP+HwnRaumbnhwdAg3akVcQDp8Kbn30CxengyV6FoBBl geNh8UmnNaULP5Rer07AOTyTXKUYEiKUt8MEpbGWMEp2LPyx5+HSpgdBE A==; X-IronPort-AV: E=McAfee;i="6200,9189,10207"; a="220936553" X-IronPort-AV: E=Sophos;i="5.88,231,1635231600"; d="scan'208";a="220936553" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Dec 2021 20:26:38 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.88,231,1635231600"; d="scan'208";a="664767253" Received: from chaop.bj.intel.com (HELO localhost) ([10.240.192.101]) by fmsmga001.fm.intel.com with ESMTP; 23 Dec 2021 20:26:31 -0800 Date: Fri, 24 Dec 2021 12:25:54 +0800 From: Chao Peng To: Paolo Bonzini Subject: Re: [PATCH v3 kvm/queue 06/16] KVM: Implement fd-based memory using MEMFD_OPS interfaces Message-ID: <20211224042554.GD44042@chaop.bj.intel.com> References: <20211223123011.41044-1-chao.p.peng@linux.intel.com> <20211223123011.41044-7-chao.p.peng@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) Received-SPF: none client-ip=192.55.52.136; envelope-from=chao.p.peng@linux.intel.com; helo=mga12.intel.com X-Spam_score_int: -44 X-Spam_score: -4.5 X-Spam_bar: ---- X-Spam_report: (-4.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.203, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_PASS=-0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Chao Peng Cc: Wanpeng Li , jun.nakajima@intel.com, kvm@vger.kernel.org, david@redhat.com, qemu-devel@nongnu.org, "J . Bruce Fields" , linux-mm@kvack.org, "H . Peter Anvin" , ak@linux.intel.com, Jonathan Corbet , Joerg Roedel , x86@kernel.org, Hugh Dickins , Ingo Molnar , Borislav Petkov , luto@kernel.org, Thomas Gleixner , Vitaly Kuznetsov , Jim Mattson , dave.hansen@intel.com, Sean Christopherson , susie.li@intel.com, Jeff Layton , linux-kernel@vger.kernel.org, john.ji@intel.com, Yu Zhang , linux-fsdevel@vger.kernel.org, Andrew Morton , "Kirill A . Shutemov" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Fri, Dec 24, 2021 at 12:09:47AM +0100, Paolo Bonzini wrote: > On 12/23/21 19:34, Sean Christopherson wrote: > > > select HAVE_KVM_PM_NOTIFIER if PM > > > + select MEMFD_OPS > > MEMFD_OPS is a weird Kconfig name given that it's not just memfd() that can > > implement the ops. > > > > Or, it's kvm that implements them to talk to memfd? The only thing is VFIO may also use the same set of callbacks, as discussed in the v2. But I think that's fine. Chao > > Paolo