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 459CFC3DA5D for ; Thu, 25 Jul 2024 07:24:32 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sWsoV-0006R5-Ur; Thu, 25 Jul 2024 03:22:59 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sWsoT-0006I1-W3 for qemu-devel@nongnu.org; Thu, 25 Jul 2024 03:22:58 -0400 Received: from mgamail.intel.com ([198.175.65.13]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sWsoR-0001Gw-Nn for qemu-devel@nongnu.org; Thu, 25 Jul 2024 03:22:57 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1721892176; x=1753428176; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=PifPO2VLSml++/yyEHfyB9LD6kSBnEg6UWh8hpYvOM8=; b=eYmZfkh5hE4npvdwm3MiVwt7mMUbQjxrExr7yytsqRWKE8oFstwHROAo QHOe+DqJ3MnCRTJ+d1KYSpGssIp4F6yKWI0eWyHmJHL0vOGLXElvAwTdl eB+ITclFUJ9pUPR7MitmMSt8mbmjtpG/DMcjXYgpPE02tl3Q/x+6gA5Sq QU0J08rNkwwFgaoJYPU2TYD+TybP1KqRqEWtg3Yo3zj2urdxmCXJLK+8o on9fm8j/e3Z4qaOjHCFMHvb6jYnSM5D1OPmesBGm04C/84i660CBiYawm 7Ry0YG12ZoWCgOTawIzbYZTUQeYitLHZAVx9ROEJ4qWZhvdGrReR4USNF g==; X-CSE-ConnectionGUID: zJDEY3W1TEOjA7TJ+Sg0ag== X-CSE-MsgGUID: MN/BdN2tQcaRi1jHrB4BeA== X-IronPort-AV: E=McAfee;i="6700,10204,11143"; a="30753988" X-IronPort-AV: E=Sophos;i="6.09,235,1716274800"; d="scan'208";a="30753988" Received: from orviesa009.jf.intel.com ([10.64.159.149]) by orvoesa105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jul 2024 00:22:53 -0700 X-CSE-ConnectionGUID: gFgeME1KR7eAyTzj7cKk1A== X-CSE-MsgGUID: xo48P9PiTWaGNySerO1iQA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.09,235,1716274800"; d="scan'208";a="52858168" Received: from emr-bkc.sh.intel.com ([10.112.230.82]) by orviesa009-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jul 2024 00:22:50 -0700 From: Chenyi Qiang To: Paolo Bonzini , David Hildenbrand , Peter Xu , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Michael Roth Cc: Chenyi Qiang , qemu-devel@nongnu.org, kvm@vger.kernel.org, Williams Dan J , Edgecombe Rick P , Wang Wei W , Peng Chao P , Gao Chao , Wu Hao , Xu Yilun Subject: [RFC PATCH 4/6] memory: Register the RamDiscardManager instance upon guest_memfd creation Date: Thu, 25 Jul 2024 03:21:13 -0400 Message-ID: <20240725072118.358923-5-chenyi.qiang@intel.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20240725072118.358923-1-chenyi.qiang@intel.com> References: <20240725072118.358923-1-chenyi.qiang@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=198.175.65.13; envelope-from=chenyi.qiang@intel.com; helo=mgamail.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=-0.136, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Instantiate a new guest_memfd_manager object and register it in the target MemoryRegion. From this point, other subsystems such as VFIO can register their listeners in guest_memfd_manager and receive conversion events through RamDiscardManager. Signed-off-by: Chenyi Qiang --- system/physmem.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/system/physmem.c b/system/physmem.c index 33d09f7571..98072ae246 100644 --- a/system/physmem.c +++ b/system/physmem.c @@ -53,6 +53,7 @@ #include "sysemu/hostmem.h" #include "sysemu/hw_accel.h" #include "sysemu/xen-mapcache.h" +#include "sysemu/guest-memfd-manager.h" #include "trace/trace-root.h" #ifdef CONFIG_FALLOCATE_PUNCH_HOLE @@ -1861,6 +1862,12 @@ static void ram_block_add(RAMBlock *new_block, Error **errp) qemu_mutex_unlock_ramlist(); goto out_free; } + + GuestMemfdManager *gmm = GUEST_MEMFD_MANAGER(object_new(TYPE_GUEST_MEMFD_MANAGER)); + GuestMemfdManagerClass *gmmc = GUEST_MEMFD_MANAGER_GET_CLASS(gmm); + g_assert(new_block->mr); + gmmc->realize(OBJECT(gmm), new_block->mr, new_block->mr->size); + memory_region_set_ram_discard_manager(gmm->mr, RAM_DISCARD_MANAGER(gmm)); } new_ram_size = MAX(old_ram_size, @@ -2118,6 +2125,8 @@ static void reclaim_ramblock(RAMBlock *block) if (block->guest_memfd >= 0) { close(block->guest_memfd); + g_assert(block->mr); + object_unref(OBJECT(block->mr->rdm)); ram_block_discard_require(false); } -- 2.43.5