From nobody Tue Feb 10 04:16:21 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=1618828810; cv=none; d=zohomail.com; s=zohoarc; b=Tvs2sINIHIMx0n+076/DJkWmwU4ecJsRyKNNL4g4kWG5Uii+SS7Y0siAa89oMtKKGUoMTkemFGdOkE7EUFWRw/CxgRrcQEQY8MT9xJTbgRIqsrmIWBOBQ+rs6IQSD922oK43D9H8Ez+KI6o/Pl87y0jaXLNGqfGMKeaNzEefZvg= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1618828810; 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=AcWIjvZDjF+BeuZeRBhqd8b1G0ZdzY8qsF5EPQksGvA=; b=gvezFyBeSw8wN6uWOOfmz8UjkkWzoFHQif169/QJHGDP2DA9UT0zxXYa/RGWIoWGzFMfKqZfhbwwugKgVp9sB6rVhrYvYnACcWdo5QAqVnrHT0jM0scuysr1Ci9T+zh0ZGCQE2S5qAqyqG7FlOq1K8nPSlduSpDLgMokpOi355c= 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 1618828810867927.473273580884; Mon, 19 Apr 2021 03:40:10 -0700 (PDT) Received: from localhost ([::1]:37246 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lYRK5-00078q-Ps for importer@patchew.org; Mon, 19 Apr 2021 06:40:09 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:33164) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lYR4N-0005Zq-BL for qemu-devel@nongnu.org; Mon, 19 Apr 2021 06:23:55 -0400 Received: from mga17.intel.com ([192.55.52.151]:24096) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lYR4L-000256-HX for qemu-devel@nongnu.org; Mon, 19 Apr 2021 06:23:55 -0400 Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Apr 2021 03:23:08 -0700 Received: from icx-2s.bj.intel.com ([10.240.192.119]) by fmsmga008.fm.intel.com with ESMTP; 19 Apr 2021 03:23:07 -0700 IronPort-SDR: YRm0piIJEgbph+a3iUhNxM69y1THg1RTUG6AtkFF0/2phhBW0UN4fy1Tmh27oBGgAR1gqDq0Oo xrx3BAvnnUmA== X-IronPort-AV: E=McAfee;i="6200,9189,9958"; a="175409318" X-IronPort-AV: E=Sophos;i="5.82,233,1613462400"; d="scan'208";a="175409318" IronPort-SDR: gaLT3Up4IDkW1r6B4Kc7NsDc3oi15fgpH9iK4LwbqIsOIPI2KeT0jZHf/omEDR/VSTzlB2bWhx 5EsefbT4ZStA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.82,233,1613462400"; d="scan'208";a="419947480" From: Yang Zhong To: qemu-devel@nongnu.org Subject: [PATCH 23/32] hostmem: Add the reset interface for EPC backend reset Date: Mon, 19 Apr 2021 18:01:47 +0800 Message-Id: <20210419100156.53504-24-yang.zhong@intel.com> X-Mailer: git-send-email 2.29.2.334.gfaefdd61ec In-Reply-To: <20210419100156.53504-1-yang.zhong@intel.com> References: <20210419100156.53504-1-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=192.55.52.151; envelope-from=yang.zhong@intel.com; helo=mga17.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 627318c0a6..c193bf6133 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 @@ -53,6 +54,21 @@ 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 71e2fc6f26..44b8c5d271 100644 --- a/include/hw/i386/pc.h +++ b/include/hw/i386/pc.h @@ -202,6 +202,8 @@ void pc_madt_cpu_entry(AcpiDeviceIf *adev, int uid, =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