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{ "id": 2223157, "url": "http://patchwork.ozlabs.org/api/covers/2223157/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/cover/20260414155433.483186-1-magnuskulke@linux.microsoft.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260414155433.483186-1-magnuskulke@linux.microsoft.com>", "list_archive_url": null, "date": "2026-04-14T15:54:24", "name": "[v4,0/9] Support QEMU cpu models in MSHV accelerator", "submitter": { "id": 90753, "url": "http://patchwork.ozlabs.org/api/people/90753/?format=api", "name": "Magnus Kulke", "email": "magnuskulke@linux.microsoft.com" }, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/cover/20260414155433.483186-1-magnuskulke@linux.microsoft.com/mbox/", "series": [ { "id": 499862, "url": "http://patchwork.ozlabs.org/api/series/499862/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=499862", "date": "2026-04-14T15:54:24", "name": "Support QEMU cpu models in MSHV accelerator", "version": 4, "mbox": "http://patchwork.ozlabs.org/series/499862/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/2223157/comments/", "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=linux.microsoft.com header.i=@linux.microsoft.com\n header.a=rsa-sha256 header.s=default header.b=WDSBcvTe;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists1p.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fw84G3hwtz1xtJ\n\tfor <incoming@patchwork.ozlabs.org>; Wed, 15 Apr 2026 01:55:10 +1000 (AEST)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists1p.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1wCg68-0004AD-2r; Tue, 14 Apr 2026 11:54:44 -0400", "from eggs.gnu.org ([2001:470:142:3::10])\n by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <magnuskulke@linux.microsoft.com>)\n id 1wCg66-0004A0-V0\n for qemu-devel@nongnu.org; Tue, 14 Apr 2026 11:54:42 -0400", "from linux.microsoft.com ([13.77.154.182])\n by eggs.gnu.org with esmtp (Exim 4.90_1)\n (envelope-from <magnuskulke@linux.microsoft.com>) id 1wCg65-0000D9-9j\n for qemu-devel@nongnu.org; Tue, 14 Apr 2026 11:54:42 -0400", "from DESKTOP-TUU1E5L.localdomain (unknown [167.220.208.32])\n by linux.microsoft.com (Postfix) with ESMTPSA id 6BFC120B6F01;\n Tue, 14 Apr 2026 08:54:37 -0700 (PDT)" ], "DKIM-Filter": "OpenDKIM Filter v2.11.0 linux.microsoft.com 6BFC120B6F01", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com;\n s=default; t=1776182079;\n bh=lIPPzyrl6JxMQVf94O6Y2eckUBAystmbLuQP3CteQ7s=;\n h=From:To:Cc:Subject:Date:From;\n b=WDSBcvTeOIpQ3RJTfdbZ1lnhGW61Li03VAHMsOMetToGlxeEzgF8KE//SdS4Ix4NX\n YMFloC56PSm8DLLn7WzIgcFUO6++RIMB5Rycnd3TWSluxkz7E+zlQTZdmND+Ws4RTZ\n aQVQXwnxc75UaEXAJCCbwRxAnX1Y+0ehvWB1QA2M=", "From": "Magnus Kulke <magnuskulke@linux.microsoft.com>", "To": "qemu-devel@nongnu.org", "Cc": "Wei Liu <wei.liu@kernel.org>, Wei Liu <liuwe@microsoft.com>,\n Magnus Kulke <magnuskulke@linux.microsoft.com>,\n Magnus Kulke <magnuskulke@microsoft.com>, Zhao Liu <zhao1.liu@intel.com>,\n Paolo Bonzini <pbonzini@redhat.com>", "Subject": "[PATCH v4 0/9] Support QEMU cpu models in MSHV accelerator", "Date": "Tue, 14 Apr 2026 17:54:24 +0200", "Message-Id": "<20260414155433.483186-1-magnuskulke@linux.microsoft.com>", "X-Mailer": "git-send-email 2.34.1", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=UTF-8", "Content-Transfer-Encoding": "8bit", "Received-SPF": "pass client-ip=13.77.154.182;\n envelope-from=magnuskulke@linux.microsoft.com; helo=linux.microsoft.com", "X-Spam_score_int": "-42", "X-Spam_score": "-4.3", "X-Spam_bar": "----", "X-Spam_report": "(-4.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001,\n SPF_HELO_PASS=-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": "qemu development <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "Hey all,\n\nIn the current MSHV accelerator code passing CPU features via the -cpu\nflag doesn't work as intended yet. When using the MSHV hypervisor we\neither silently discard the specified model/features and leave it up\nto the hypervisor to provide a sensible set of features or if the user\nselects -cpu host, the hypervisor might refuse to create a partition.\n\nThis changeset introduces a more comprehensive support for passing\ndesired guest cpu features to the hypervisor. It's also a prerequisite\nfor Live Migration support.\n\nChanges since v3:\n\n- Rebased onto current master\n\nChanges since v2:\n\n- move disabling of la57 to arch specific code\n- assert MSHV_NUM_CPU_FEATURES_BANKS == 2\n- dropped QEMU_PACKED changes to hv headers (address in individal patch)\n\nChanges since v1:\n\n- query hypervisor for supported processor features instead of the host OS\n- disable la57 (5 level page tables)\n\nbest,\n\nmagnus\n\nMagnus Kulke (9):\n accel/mshv: use mshv_create_partition_v2 payload\n target/i386/mshv: fix cpuid propagation bug\n target/i386/mshv: fix various cpuid traversal bugs\n target/i386/mshv: change cpuid mask to UINT32_MAX\n target/i386/mshv: set cpu model name on -cpu host\n target/i386: query mshv accel for supported cpuids\n target/i386/mshv: populate xsave area offsets\n target/i386/mshv: filter out CET bits in cpuid\n accel/mshv: disable la57 (5lvl paging)\n\n accel/mshv/mshv-all.c | 78 ++++++++++-\n include/hw/hyperv/hvgdk_mini.h | 2 +\n include/hw/hyperv/hvhdk.h | 195 +++++++++++++++++++++++++++\n include/system/mshv.h | 3 +\n include/system/mshv_int.h | 2 +\n target/i386/cpu.c | 8 ++\n target/i386/mshv/mshv-cpu.c | 233 +++++++++++++++++++++++++++------\n 7 files changed, 472 insertions(+), 49 deletions(-)" }