From nobody Mon Feb 9 11:32:41 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=1619765403; cv=none; d=zohomail.com; s=zohoarc; b=E5WNeVyygrUo48I8OlYFZGfzLl1pLnyL2EwVHwg1qrW3HJg2q2oDutbep7n3So9vaX1t2+Sk0NQ20Je9VEh6fs7lQJHDfpM3btUer9YrI8YXHj6kLKn6G2nDBIDRxInAZWwZ7BAYaXncufx09n0vABGHpkhGiU2fX3COgv+Ylxc= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1619765403; 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=14u2L6wUFWoZ3HHQPG8wMq9BPYChUhytA3s+vaSQ+G8=; b=O30lkKzV6/M+Bky5GNZoWXuFAZVu9bL8hbRG4QJWd3Zu7R9C3jnsri9l+NUTwCf1WsZarx1rcAdHLFW8R8nopYcDZXjsUK7IwYGLKEO0aJdRAIdhxE/VIF5p33JeJDXyvGR9XN7cMxuSq4PKnWnK/SGciGfTWJB05Gvj3iogavI= 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 1619765403351319.3490523001184; Thu, 29 Apr 2021 23:50:03 -0700 (PDT) Received: from localhost ([::1]:33480 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lcMyQ-0001r3-53 for importer@patchew.org; Fri, 30 Apr 2021 02:50:02 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:46158) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lcMev-0005rv-5o for qemu-devel@nongnu.org; Fri, 30 Apr 2021 02:29:53 -0400 Received: from mga11.intel.com ([192.55.52.93]:63436) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lcMer-00015T-SZ for qemu-devel@nongnu.org; Fri, 30 Apr 2021 02:29:52 -0400 Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Apr 2021 23:28:53 -0700 Received: from icx-2s.bj.intel.com ([10.240.192.119]) by orsmga003.jf.intel.com with ESMTP; 29 Apr 2021 23:28:51 -0700 IronPort-SDR: CrzOt9hsLyscECc85zHGbj5NTSGnNJlBFAV86nB8BjHxWBSKLFlQfbozq8uN7KIqy2dy7kZdJd tFnZCC4IPn4A== X-IronPort-AV: E=McAfee;i="6200,9189,9969"; a="194023118" X-IronPort-AV: E=Sophos;i="5.82,260,1613462400"; d="scan'208";a="194023118" IronPort-SDR: FxzGdUlnMfDQG/PsCSJzk3Glx1RI4B0idy6HV0+0t6soT32qBqIp14a09mR4aKd+0YjTXIK01c mZdsTSoVwG9A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.82,260,1613462400"; d="scan'208";a="387258615" From: Yang Zhong To: qemu-devel@nongnu.org Subject: [RESEND PATCH 23/32] hostmem: Add the reset interface for EPC backend reset Date: Fri, 30 Apr 2021 14:24:46 +0800 Message-Id: <20210430062455.8117-24-yang.zhong@intel.com> X-Mailer: git-send-email 2.29.2.334.gfaefdd61ec In-Reply-To: <20210430062455.8117-1-yang.zhong@intel.com> References: <20210430062455.8117-1-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=192.55.52.93; envelope-from=yang.zhong@intel.com; helo=mga11.intel.com X-Spam_score_int: -68 X-Spam_score: -6.9 X-Spam_bar: ------ X-Spam_report: (-6.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, 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 f267cf9f91..f12f26d39f 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