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 X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,MSGID_FROM_MTA_HEADER,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 41A11C4338F for ; Mon, 16 Aug 2021 13:30:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 27A8260F46 for ; Mon, 16 Aug 2021 13:30:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240276AbhHPNat (ORCPT ); Mon, 16 Aug 2021 09:30:49 -0400 Received: from mail-dm3nam07on2077.outbound.protection.outlook.com ([40.107.95.77]:57472 "EHLO NAM02-DM3-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S240474AbhHPN0Z (ORCPT ); Mon, 16 Aug 2021 09:26:25 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=dUQczqWGxXhExENzQbGuq7JrkdbbF2yH6kO0AlLs4YcgFteVRHhOogKhyuSmMgZCMN47a91ml6T+9/0db0OruuWiMC+8bAtG58grwDX99UeYaa7fRbEmXvQ4s8YuDnnoy7Pn6L5Z5UXqCK8NhryxCr3JKh/7d73tU/GDeruQJyX0OWU6SUW4bqa/4jlR6AAr6C/cVZYvvk018hRb3X8jX84ErrZk0ho3Uv53i+i5LmmJfwMWFSdDTeGi63UgwbFrL2OYI3UdlA3xdGUIemy+lIIYeJbcgJa8yY+qJWpRi76AagRzdU5DqtLzOPKQI/Zi+DkQ8j7EwQC0rKJPnXZjfw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=EPsE+CAJ8BpubbRHi4IHFilhxdQ6OFF47jM4PPFPZRs=; b=TDhwazkbVjpjYCXtXaIdLt8tFUJSZ93K3yZ+WqvP8AeRdBmFzPJj7VoTL9zXoH6nhDSFkyfGV/cNH0WnLzr2Avv9dKIslAsjrbVJ68R/spfYdvJog27teGkOE6ES0YacJ6z5zy1laaK7g08PeWhWpPTQ9MxbXM6JwhowHgHR9ALrj1ZjgHue9lu6xMXBFNHwRuiNsEHZVSRCSbTNpQSbNR96F4WKnJfxj6lvB2PqxYHPCflCLkNJNwVwRQx3Ku5eMV2taJJYzO2/55RUc1/dRKI4MAxP1Xab7o8QlZlMxZJsXTYTBozuxuUte1h5BqT2M+ps2FNGx9Qaw00Qk830dw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=amd.com; dmarc=pass action=none header.from=amd.com; dkim=pass header.d=amd.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=EPsE+CAJ8BpubbRHi4IHFilhxdQ6OFF47jM4PPFPZRs=; b=ui0UAmKQUzyvucA2U+4xqFADAQFCVdQaDQ+TD1goMLOYsPHmCtNLBw1WLWw74I/oOyEul05dAdsN1gPOnnk2hSSvty0HFQMEAab56r2EfrMCICM0gK4jIGrsPRrTDQK7Kshqntu/bRQ1NEYtv7gqszaQWsHtMwOQGrpnj96UASE= Authentication-Results: nongnu.org; dkim=none (message not signed) header.d=none;nongnu.org; dmarc=none action=none header.from=amd.com; Received: from SN6PR12MB2767.namprd12.prod.outlook.com (2603:10b6:805:75::23) by SA0PR12MB4446.namprd12.prod.outlook.com (2603:10b6:806:71::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4415.17; Mon, 16 Aug 2021 13:25:52 +0000 Received: from SN6PR12MB2767.namprd12.prod.outlook.com ([fe80::491e:2642:bae2:8b73]) by SN6PR12MB2767.namprd12.prod.outlook.com ([fe80::491e:2642:bae2:8b73%7]) with mapi id 15.20.4415.023; Mon, 16 Aug 2021 13:25:52 +0000 From: Ashish Kalra To: qemu-devel@nongnu.org Cc: pbonzini@redhat.com, thomas.lendacky@amd.com, brijesh.singh@amd.com, ehabkost@redhat.com, mst@redhat.com, richard.henderson@linaro.org, jejb@linux.ibm.com, tobin@ibm.com, dovmurik@linux.vnet.ibm.com, frankeh@us.ibm.com, dgilbert@redhat.com, kvm@vger.kernel.org Subject: [RFC PATCH 00/13] Add support for Mirror VM. 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The patch-set creates a new VM and shares the primary VM's encryption context with it using the KVM_CAP_VM_COPY_ENC_CONTEXT_FROM capability. The mirror VM uses a separate pair of VM + vCPU file descriptors and also uses a simplified KVM run loop, for example, it does not support any interrupt vmexit's. etc. Currently the mirror VM shares the address space of the primary VM. The mirror VM can be used for running an in-guest migration helper (MH). It also might have future uses for other in-guest operations. The mirror VM support is enabled by adding a mirrorvcpus=N suboption to -smp, which also designates a few vcpus (normally 1) to the mirror VM. Example usage for starting a 4-vcpu guest, of which 1 vcpu is marked as mirror vcpu. qemu-system-x86_64 -smp 4,mirrorvcpus=1 ... Ashish Kalra (7): kvm: Add Mirror VM ioctl and enable cap interfaces. kvm: Add Mirror VM support. kvm: create Mirror VM and share primary VM's encryption context. softmmu/cpu: Skip mirror vcpu's for pause, resume and synchronization. kvm/apic: Disable in-kernel APIC support for mirror vcpu's. hw/acpi: disable modern CPU hotplug interface for mirror vcpu's hw/i386/pc: reduce fw_cfg boot cpu count taking into account mirror vcpu's. Dov Murik (5): machine: Add mirrorvcpus=N suboption to -smp hw/boards: Add mirror_vcpu flag to CPUArchId hw/i386: Mark mirror vcpus in possible_cpus cpu: Add boolean mirror_vcpu field to CPUState hw/i386: Set CPUState.mirror_vcpu=true for mirror vcpus Tobin Feldman-Fitzthum (1): hw/acpi: Don't include mirror vcpus in ACPI tables accel/kvm/kvm-accel-ops.c | 45 ++++++- accel/kvm/kvm-all.c | 244 +++++++++++++++++++++++++++++++++++++- accel/kvm/kvm-cpus.h | 2 + hw/acpi/cpu.c | 21 +++- hw/core/cpu-common.c | 1 + hw/core/machine.c | 7 ++ hw/i386/acpi-build.c | 5 + hw/i386/acpi-common.c | 5 + hw/i386/kvm/apic.c | 15 +++ hw/i386/pc.c | 10 ++ hw/i386/x86.c | 11 +- include/hw/acpi/cpu.h | 1 + include/hw/boards.h | 3 + include/hw/core/cpu.h | 3 + include/hw/i386/x86.h | 3 +- include/sysemu/kvm.h | 15 +++ qapi/machine.json | 5 +- softmmu/cpus.c | 27 +++++ softmmu/vl.c | 3 + target/i386/kvm/kvm.c | 42 +++++++ 20 files changed, 459 insertions(+), 9 deletions(-) -- 2.17.1