From nobody Mon Feb 9 18:19:45 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=intel.com ARC-Seal: i=1; a=rsa-sha256; t=1620715788; cv=none; d=zohomail.com; s=zohoarc; b=coee2U1sdYNmNGv8ZWWVvpLuxYeihjN2Voh7e/pT4eeGtWPo/lF/Z7lEyS9+EGFvpMEW32eunMLRMgUt/a/rdeZb1nf6WO+ju5f6xyyUCcWuaPe/jSOWVRlnC190q5mtmIFkDC9QAmrMmsAP+YrK3ZDDBK0Jilzze3Yw9xFOw2k= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1620715788; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=LoSixd02A9HasJ7XlgTPLsMLP12tCM2CejePHrWfk5g=; b=QQWhRu2iwGBKqcYitVddcQbcx/PETmmEbAvyWfEL7u+Qj7r9cQO2cHPMTVszrmIxToAYhiNq6cDqK46qNH0NNiZ78pAnhdG4Kzor7u8GKLfIiKvtV537Gq6H9TCRoE48F39A1F/svCiN+OuQF6ktqvkNaE/eZNPNYWoQfXD9mZQ= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1620715788805957.6689978332068; Mon, 10 May 2021 23:49:48 -0700 (PDT) Received: from localhost ([::1]:57344 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lgMDD-0000Pi-Rc for importer@patchew.org; Tue, 11 May 2021 02:49:47 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:40762) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lgLt8-0007WS-94 for qemu-devel@nongnu.org; Tue, 11 May 2021 02:29:02 -0400 Received: from mga06.intel.com ([134.134.136.31]:46423) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lgLt0-0004ZR-UP for qemu-devel@nongnu.org; Tue, 11 May 2021 02:29:02 -0400 Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 May 2021 23:28:14 -0700 Received: from icx-2s.bj.intel.com ([10.240.192.119]) by orsmga003.jf.intel.com with ESMTP; 10 May 2021 23:28:12 -0700 IronPort-SDR: I33I77a373NaUvOQG2Y7rQQ5fqfHoqcbI1wu2+mc6Se0x60NzEEmVGB7xKSUd0vtEEw7IwUvzn /2eHSJfXR1Ew== X-IronPort-AV: E=McAfee;i="6200,9189,9980"; a="260631572" X-IronPort-AV: E=Sophos;i="5.82,290,1613462400"; d="scan'208";a="260631572" IronPort-SDR: D/0ZRvB2Gtby0sryf3a4ssseqJQayDKfHMJ7TA7wT0bLPf3g64UGm3GcPJKNVIRul5LSjvfvXb EyPmNAXMcVlg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.82,290,1613462400"; d="scan'208";a="391281334" From: Yang Zhong To: qemu-devel@nongnu.org Subject: [PATCH v2 23/32] hostmem: Add the reset interface for EPC backend reset Date: Tue, 11 May 2021 14:20:42 +0800 Message-Id: <20210511062051.41948-24-yang.zhong@intel.com> X-Mailer: git-send-email 2.29.2.334.gfaefdd61ec In-Reply-To: <20210511062051.41948-1-yang.zhong@intel.com> References: <20210511062051.41948-1-yang.zhong@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=134.134.136.31; envelope-from=yang.zhong@intel.com; helo=mga06.intel.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: yang.zhong@intel.com, pbonzini@redhat.com, kai.huang@intel.com, seanjc@google.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" Add the sgx_memory_backend_reset() interface to handle EPC backend reset when VM is reset. This reset function will destroy previous backend memory region and re-mmap the EPC section for guest. Signed-off-by: Yang Zhong --- backends/hostmem-epc.c | 16 ++++++++++++++++ include/hw/i386/pc.h | 2 ++ 2 files changed, 18 insertions(+) diff --git a/backends/hostmem-epc.c b/backends/hostmem-epc.c index b512a68cb0..3bd1535d82 100644 --- a/backends/hostmem-epc.c +++ b/backends/hostmem-epc.c @@ -16,6 +16,7 @@ #include "qom/object_interfaces.h" #include "qapi/error.h" #include "sysemu/hostmem.h" +#include "hw/i386/pc.h" =20 #define TYPE_MEMORY_BACKEND_EPC "memory-backend-epc" =20 @@ -55,6 +56,21 @@ sgx_epc_backend_memory_alloc(HostMemoryBackend *backend,= Error **errp) g_free(name); } =20 +void sgx_memory_backend_reset(HostMemoryBackend *backend, int fd, + Error **errp) +{ + MemoryRegion *mr =3D &backend->mr; + + mr->enabled =3D false; + + /* destroy the old memory region if it exist */ + if (fd > 0 && mr->destructor) { + mr->destructor(mr); + } + + sgx_epc_backend_memory_alloc(backend, errp); +} + static void sgx_epc_backend_instance_init(Object *obj) { HostMemoryBackend *m =3D MEMORY_BACKEND(obj); diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h index 860ac838c5..a9167e3c3f 100644 --- a/include/hw/i386/pc.h +++ b/include/hw/i386/pc.h @@ -205,6 +205,8 @@ extern const size_t pc_compat_6_0_len; =20 /* sgx-epc.c */ void pc_machine_init_sgx_epc(PCMachineState *pcms); +void sgx_memory_backend_reset(HostMemoryBackend *backend, int fd, + Error **errp); =20 extern GlobalProperty pc_compat_5_2[]; extern const size_t pc_compat_5_2_len; --=20 2.29.2.334.gfaefdd61ec