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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 46011C4332F for ; Fri, 24 Dec 2021 04:26:42 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id B3AF16B0078; Thu, 23 Dec 2021 23:26:41 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id AC2CC6B007B; Thu, 23 Dec 2021 23:26:41 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 98A416B007D; Thu, 23 Dec 2021 23:26:41 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0071.hostedemail.com [216.40.44.71]) by kanga.kvack.org (Postfix) with ESMTP id 82C1A6B0078 for ; Thu, 23 Dec 2021 23:26:41 -0500 (EST) Received: from smtpin05.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 3B4A9181AC9C6 for ; Fri, 24 Dec 2021 04:26:41 +0000 (UTC) X-FDA: 78951401802.05.52B557F Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by imf07.hostedemail.com (Postfix) with ESMTP id 78E244003B for ; Fri, 24 Dec 2021 04:26:40 +0000 (UTC) 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="227770228" X-IronPort-AV: E=Sophos;i="5.88,231,1635231600"; d="scan'208";a="227770228" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga106.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) Authentication-Results: imf07.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=mNX99f7C; spf=none (imf07.hostedemail.com: domain of chao.p.peng@linux.intel.com has no SPF policy when checking 134.134.136.126) smtp.mailfrom=chao.p.peng@linux.intel.com; dmarc=pass (policy=none) header.from=intel.com X-Rspamd-Queue-Id: 78E244003B X-Stat-Signature: zq71xokqhhyaahecww36gw4q3txez5yb X-Rspamd-Server: rspam04 X-HE-Tag: 1640320000-108278 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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