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GET /api/1.2/patches/2224390/?format=api
{ "id": 2224390, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2224390/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260417105618.3621-23-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": "<20260417105618.3621-23-magnuskulke@linux.microsoft.com>", "list_archive_url": null, "date": "2026-04-17T10:56:06", "name": "[22/34] target/i386/mshv: migrate Synic SINT MSRs", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "e53b5635b5be1661133efd1d9a08f0078693dd5f", "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/20260417105618.3621-23-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/2224390/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2224390/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=Y1uj1HM/;\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 4fxsLg10BLz1yD3\n\tfor <incoming@patchwork.ozlabs.org>; Fri, 17 Apr 2026 20:58:35 +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 1wDgti-00031q-EA; Fri, 17 Apr 2026 06:58:06 -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 1wDgta-0002iC-8H\n for qemu-devel@nongnu.org; Fri, 17 Apr 2026 06:58:00 -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 1wDgtY-0001hl-Gk\n for qemu-devel@nongnu.org; Fri, 17 Apr 2026 06:57:57 -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 065BB20B712B;\n Fri, 17 Apr 2026 03:57:42 -0700 (PDT)" ], "DKIM-Filter": "OpenDKIM Filter v2.11.0 linux.microsoft.com 065BB20B712B", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com;\n s=default; t=1776423465;\n bh=hkvpr9QCwBz+aAxOE4MLQ16OiKG8v7Bh8aJx066T5TY=;\n h=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n b=Y1uj1HM/fKCyvdDoBgRqm5KPgSqUuCU5IBK7lkT0ODgu807lNDX4HLDygbCnYLJ7U\n LNCehxjd6mjE9oJNou5fw3IscyspowhJVKcM23Hxz2UCQNs2jm59OOOpcg9TTEy8AI\n dzp0uVO9TpyAgcnx/BVb09RJYia4Kaa96VypdLI4=", "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 22/34] target/i386/mshv: migrate Synic SINT MSRs", "Date": "Fri, 17 Apr 2026 12:56:06 +0200", "Message-Id": "<20260417105618.3621-23-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": "Migrate HyperV SynIC SINT MSRs. We can only read/write those if SCONTROL\nis enabled in the guest, hence we have to split the SINT MSR out and\nmake reading/writing them dependent on that MSR.\n\nSigned-off-by: Magnus Kulke <magnuskulke@linux.microsoft.com>\n---\n target/i386/mshv/msr.c | 41 +++++++++++++++++++++++++++++++++++++++++\n 1 file changed, 41 insertions(+)", "diff": "diff --git a/target/i386/mshv/msr.c b/target/i386/mshv/msr.c\nindex b26375e4c2..4881e15f4b 100644\n--- a/target/i386/mshv/msr.c\n+++ b/target/i386/mshv/msr.c\n@@ -303,6 +303,8 @@ int mshv_get_msrs(CPUState *cpu)\n struct hv_register_assoc assocs[MSHV_MSR_TOTAL_COUNT];\n size_t i, j;\n uint32_t name;\n+ X86CPU *x86cpu = X86_CPU(cpu);\n+ bool synic_enabled;\n \n set_hv_name_in_assocs(assocs, n_assocs);\n \n@@ -329,6 +331,27 @@ int mshv_get_msrs(CPUState *cpu)\n \n store_in_env(cpu, assocs, n_assocs);\n \n+ /* Read SINT MSRs only if SynIC is enabled */\n+ synic_enabled = x86cpu->env.msr_hv_synic_control & 1;\n+ if (synic_enabled) {\n+ QEMU_BUILD_BUG_ON(MSHV_MSR_TOTAL_COUNT < HV_SINT_COUNT);\n+\n+ for (i = 0; i < HV_SINT_COUNT; i++) {\n+ assocs[i].name = HV_REGISTER_SINT0 + i;\n+ }\n+\n+ ret = mshv_get_generic_regs(cpu, assocs, HV_SINT_COUNT);\n+ if (ret < 0) {\n+ error_report(\"Failed to get SynIC SINT MSRs\");\n+ return -errno;\n+ }\n+\n+ for (i = 0; i < HV_SINT_COUNT; i++) {\n+ uint64_t hv_sint_value = assocs[i].value.reg64;\n+ x86cpu->env.msr_hv_synic_sint[i] = hv_sint_value;\n+ }\n+ }\n+\n return 0;\n }\n \n@@ -363,6 +386,8 @@ int mshv_set_msrs(const CPUState *cpu)\n struct hv_register_assoc assocs[MSHV_MSR_TOTAL_COUNT];\n int ret;\n size_t i, j;\n+ X86CPU *x86cpu = X86_CPU(cpu);\n+ bool synic_enabled = x86cpu->env.msr_hv_synic_control & 1;\n \n load_from_env(cpu, assocs, n_assocs);\n \n@@ -395,5 +420,21 @@ int mshv_set_msrs(const CPUState *cpu)\n return -errno;\n }\n \n+ /* SINT MSRs can only be written if SCONTROL has been set, so we split */\n+ if (synic_enabled) {\n+ QEMU_BUILD_BUG_ON(MSHV_MSR_TOTAL_COUNT < HV_SINT_COUNT);\n+\n+ for (i = 0; i < HV_SINT_COUNT; i++) {\n+ assocs[i].name = HV_REGISTER_SINT0 + i;\n+ assocs[i].value.reg64 = x86cpu->env.msr_hv_synic_sint[i];\n+ }\n+\n+ ret = mshv_set_generic_regs(cpu, assocs, HV_SINT_COUNT);\n+ if (ret < 0) {\n+ error_report(\"Failed to set SynIC SINT MSRs\");\n+ return -errno;\n+ }\n+ }\n+\n return 0;\n }\n", "prefixes": [ "22/34" ] }