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GET /api/1.2/patches/2224406/?format=api
{ "id": 2224406, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2224406/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260417105618.3621-29-magnuskulke@linux.microsoft.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.2/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": "<20260417105618.3621-29-magnuskulke@linux.microsoft.com>", "list_archive_url": null, "date": "2026-04-17T10:56:12", "name": "[28/34] accel/mshv: migrate REFERENCE_TIME", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "ee2d8cb8a71e9a489309d6647762b2f0e8489fe2", "submitter": { "id": 90753, "url": "http://patchwork.ozlabs.org/api/1.2/people/90753/?format=api", "name": "Magnus Kulke", "email": "magnuskulke@linux.microsoft.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260417105618.3621-29-magnuskulke@linux.microsoft.com/mbox/", "series": [ { "id": 500310, "url": "http://patchwork.ozlabs.org/api/1.2/series/500310/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=500310", "date": "2026-04-17T10:55:44", "name": "Add migration support to the MSHV accelerator", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/500310/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2224406/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2224406/checks/", "tags": {}, "related": [], "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=C6IStHff;\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 4fxsMj62rvz1yD3\n\tfor <incoming@patchwork.ozlabs.org>; Fri, 17 Apr 2026 20:59:29 +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 1wDgu1-0004aE-84; Fri, 17 Apr 2026 06:58:25 -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 1wDgtx-0004Gk-Vd\n for qemu-devel@nongnu.org; Fri, 17 Apr 2026 06:58:22 -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 1wDgtv-0001sf-UX\n for qemu-devel@nongnu.org; Fri, 17 Apr 2026 06:58:21 -0400", "from DESKTOP-TUU1E5L.fritz.box (p5086d620.dip0.t-ipconnect.de\n [80.134.214.32])\n by linux.microsoft.com (Postfix) with ESMTPSA id E495620B7017;\n Fri, 17 Apr 2026 03:58:04 -0700 (PDT)" ], "DKIM-Filter": "OpenDKIM Filter v2.11.0 linux.microsoft.com E495620B7017", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com;\n s=default; t=1776423487;\n bh=4cX7kwrC8tL3yJ980nP1aC4n5bj8Kias0ChJgrNCaVA=;\n h=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n b=C6IStHff1j2Bwd7EN76TXJIE7y5260bQaYIAsQUo/yyYZn6Dx+ZPETH9SunNpo9UF\n 9YAWVAqCF7lhDMi38YdNYvX+GhyOAlr2eas0Tfixw12EnOMG8fdhz+xpIdk1D+QLn4\n rdnaMM+rMT6AtBQs4oz+KZzDf53Mtf7Eyzb/5Ez0=", "From": "Magnus Kulke <magnuskulke@linux.microsoft.com>", "To": "qemu-devel@nongnu.org", "Cc": "kvm@vger.kernel.org, Magnus Kulke <magnuskulke@microsoft.com>,\n Wei Liu <liuwe@microsoft.com>, \"Michael S. Tsirkin\" <mst@redhat.com>,\n\t=?utf-8?q?C=C3=A9dric_Le_Goater?= <clg@redhat.com>,\n Zhao Liu <zhao1.liu@intel.com>,\n Richard Henderson <richard.henderson@linaro.org>,\n Paolo Bonzini <pbonzini@redhat.com>, Wei Liu <wei.liu@kernel.org>,\n Magnus Kulke <magnuskulke@linux.microsoft.com>,\n Alex Williamson <alex@shazbot.org>,\n Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, =?utf-8?q?Philippe_Mathieu-D?=\n\t=?utf-8?q?aud=C3=A9?= <philmd@linaro.org>,\n Marcelo Tosatti <mtosatti@redhat.com>", "Subject": "[PATCH 28/34] accel/mshv: migrate REFERENCE_TIME", "Date": "Fri, 17 Apr 2026 12:56:12 +0200", "Message-Id": "<20260417105618.3621-29-magnuskulke@linux.microsoft.com>", "X-Mailer": "git-send-email 2.34.1", "In-Reply-To": "<20260417105618.3621-1-magnuskulke@linux.microsoft.com>", "References": "<20260417105618.3621-1-magnuskulke@linux.microsoft.com>", "MIME-Version": "1.0", "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": "This is a partition-wide state that we use a dedicated handler for. It\nis stored as-is in the \"mshv\" savevm_live field. We might have to extend\nthis later if we have more partition-wide state to roundtrip.\n\nSigned-off-by: Magnus Kulke <magnuskulke@linux.microsoft.com>\n---\n accel/mshv/mshv-all.c | 70 ++++++++++++++++++++++++++++++++++++++++++-\n 1 file changed, 69 insertions(+), 1 deletion(-)", "diff": "diff --git a/accel/mshv/mshv-all.c b/accel/mshv/mshv-all.c\nindex e97f480551..facdc733e7 100644\n--- a/accel/mshv/mshv-all.c\n+++ b/accel/mshv/mshv-all.c\n@@ -85,13 +85,81 @@ static int set_time_freeze(int vm_fd, int freeze)\n return 0;\n }\n \n+static int get_reference_time(int vm_fd, uint64_t *ref_time)\n+{\n+ int ret;\n+ struct hv_input_get_partition_property in = {0};\n+ struct hv_output_get_partition_property out = {0};\n+ struct mshv_root_hvcall args = {0};\n+\n+ in.property_code = HV_PARTITION_PROPERTY_REFERENCE_TIME;\n+\n+ args.code = HVCALL_GET_PARTITION_PROPERTY;\n+ args.in_sz = sizeof(in);\n+ args.in_ptr = (uint64_t)∈\n+ args.out_sz = sizeof(out);\n+ args.out_ptr = (uint64_t)&out;\n+\n+ ret = mshv_hvcall(vm_fd, &args);\n+ if (ret < 0) {\n+ error_report(\"Failed to get reference time\");\n+ return -1;\n+ }\n+\n+ *ref_time = out.property_value;\n+ return 0;\n+}\n+\n static void mshv_save_state(QEMUFile *f, void *opaque)\n {\n- return;\n+ MshvState *s = opaque;\n+ uint64_t ref_time;\n+ int ret;\n+\n+ ret = get_reference_time(s->vm, &ref_time);\n+ if (ret < 0) {\n+ error_report(\"Failed to get reference time for migration\");\n+ abort();\n+ }\n+\n+ qemu_put_be64(f, ref_time);\n+}\n+\n+static int set_reference_time(int vm_fd, uint64_t ref_time)\n+{\n+ int ret;\n+ struct hv_input_set_partition_property in = {0};\n+ struct mshv_root_hvcall args = {0};\n+\n+ in.property_code = HV_PARTITION_PROPERTY_REFERENCE_TIME;\n+ in.property_value = ref_time;\n+\n+ args.code = HVCALL_SET_PARTITION_PROPERTY;\n+ args.in_sz = sizeof(in);\n+ args.in_ptr = (uint64_t)∈\n+\n+ ret = mshv_hvcall(vm_fd, &args);\n+ if (ret < 0) {\n+ error_report(\"Failed to set reference time\");\n+ return -1;\n+ }\n+\n+ return 0;\n }\n \n static int mshv_load_state(QEMUFile *f, void *opaque, int version_id)\n {\n+ MshvState *s = opaque;\n+ uint64_t ref_time;\n+ int ret;\n+\n+ ref_time = qemu_get_be64(f);\n+\n+ ret = set_reference_time(s->vm, ref_time);\n+ if (ret < 0) {\n+ error_report(\"Failed to set reference time after migration\");\n+ return -1;\n+ }\n return 0;\n }\n \n", "prefixes": [ "28/34" ] }