Patch Detail
get:
Show a patch.
patch:
Update a patch.
put:
Update a patch.
GET /api/1.2/patches/2224393/?format=api
{ "id": 2224393, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2224393/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260417105618.3621-24-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": "<20260417105618.3621-24-magnuskulke@linux.microsoft.com>", "list_archive_url": null, "date": "2026-04-17T10:56:07", "name": "[23/34] target/i386/mshv: migrate CET/SS MSRs", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "35f82403658cd350cef6a3245a3191d553ecf11e", "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/20260417105618.3621-24-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/2224393/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2224393/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=QzG34/US;\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 4fxsLl7517z1yHp\n\tfor <incoming@patchwork.ozlabs.org>; Fri, 17 Apr 2026 20:58:39 +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 1wDgtl-0003Db-IN; Fri, 17 Apr 2026 06:58:09 -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 1wDgtf-0002ph-AI\n for qemu-devel@nongnu.org; Fri, 17 Apr 2026 06:58:04 -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 1wDgtd-0001lP-LC\n for qemu-devel@nongnu.org; Fri, 17 Apr 2026 06:58:02 -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 80B5120B7129;\n Fri, 17 Apr 2026 03:57:46 -0700 (PDT)" ], "DKIM-Filter": "OpenDKIM Filter v2.11.0 linux.microsoft.com 80B5120B7129", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com;\n s=default; t=1776423469;\n bh=S92dx0H1HZeFjxrVBmrak0WH0pq895/vNqGc9ASOqFs=;\n h=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n b=QzG34/USBCzLRxtfv5Cfx0sEjeo1SylWPk4y4zWIlWIewfUlKAhglnunro8MJfv+8\n WCTTwoq/QIt3HL80tqW5tW4Vi6tI/q++c85z8pQ5tOErvqywwrpP8oLifxQkN++19N\n ROttbN3jyNWSKd2HX/dhPYE9FXj40826SBC9xhes=", "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 23/34] target/i386/mshv: migrate CET/SS MSRs", "Date": "Fri, 17 Apr 2026 12:56:07 +0200", "Message-Id": "<20260417105618.3621-24-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 change migrates the MSRs required for CET shadow stack and indirect\nbranch tracking. They are gated behind cet_ss_support || cet_ibt_support\nmshv processor feature flags.\n\nSigned-off-by: Magnus Kulke <magnuskulke@linux.microsoft.com>\n---\n include/hw/hyperv/hvgdk_mini.h | 11 +++++++++++\n target/i386/mshv/msr.c | 30 ++++++++++++++++++++++++++++++\n 2 files changed, 41 insertions(+)", "diff": "diff --git a/include/hw/hyperv/hvgdk_mini.h b/include/hw/hyperv/hvgdk_mini.h\nindex 4d1e062e48..75e953b86c 100644\n--- a/include/hw/hyperv/hvgdk_mini.h\n+++ b/include/hw/hyperv/hvgdk_mini.h\n@@ -168,6 +168,17 @@ typedef enum hv_register_name {\n HV_X64_REGISTER_TSC_DEADLINE = 0x00080095,\n HV_X64_REGISTER_TSC_ADJUST = 0x00080096,\n \n+ /* CET / Shadow Stack */\n+ HV_X64_REGISTER_U_XSS = 0x0008008B,\n+ HV_X64_REGISTER_U_CET = 0x0008008C,\n+ HV_X64_REGISTER_S_CET = 0x0008008D,\n+ HV_X64_REGISTER_SSP = 0x0008008E,\n+ HV_X64_REGISTER_PL0_SSP = 0x0008008F,\n+ HV_X64_REGISTER_PL1_SSP = 0x00080090,\n+ HV_X64_REGISTER_PL2_SSP = 0x00080091,\n+ HV_X64_REGISTER_PL3_SSP = 0x00080092,\n+ HV_X64_REGISTER_INTERRUPT_SSP_TABLE_ADDR = 0x00080093,\n+\n /* Other MSRs */\n HV_X64_REGISTER_MSR_IA32_MISC_ENABLE = 0x000800A0,\n \ndiff --git a/target/i386/mshv/msr.c b/target/i386/mshv/msr.c\nindex 4881e15f4b..b985500797 100644\n--- a/target/i386/mshv/msr.c\n+++ b/target/i386/mshv/msr.c\n@@ -83,6 +83,26 @@ static const MshvMsrEnvMap msr_env_map[] = {\n { IA32_MSR_MTRR_DEF_TYPE, HV_X64_REGISTER_MSR_MTRR_DEF_TYPE,\n offsetof(CPUX86State, mtrr_deftype) },\n \n+ /* CET / Shadow Stack */\n+ { MSR_IA32_U_CET, HV_X64_REGISTER_U_CET,\n+ offsetof(CPUX86State, u_cet) },\n+ { MSR_IA32_S_CET, HV_X64_REGISTER_S_CET,\n+ offsetof(CPUX86State, s_cet) },\n+ { MSR_IA32_PL0_SSP, HV_X64_REGISTER_PL0_SSP,\n+ offsetof(CPUX86State, pl0_ssp) },\n+ { MSR_IA32_PL1_SSP, HV_X64_REGISTER_PL1_SSP,\n+ offsetof(CPUX86State, pl1_ssp) },\n+ { MSR_IA32_PL2_SSP, HV_X64_REGISTER_PL2_SSP,\n+ offsetof(CPUX86State, pl2_ssp) },\n+ { MSR_IA32_PL3_SSP, HV_X64_REGISTER_PL3_SSP,\n+ offsetof(CPUX86State, pl3_ssp) },\n+ { MSR_IA32_INT_SSP_TAB, HV_X64_REGISTER_INTERRUPT_SSP_TABLE_ADDR,\n+ offsetof(CPUX86State, int_ssp_table) },\n+\n+ /* XSAVE Supervisor State */\n+ { MSR_IA32_XSS, HV_X64_REGISTER_U_XSS,\n+ offsetof(CPUX86State, xss) },\n+\n /* Other */\n \n /* TODO: find out processor features that correlate to unsupported MSRs. */\n@@ -291,6 +311,16 @@ static bool msr_supported(uint32_t name)\n return mshv_state->processor_features.tsc_adjust_support;\n case HV_X64_REGISTER_TSC_DEADLINE:\n return mshv_state->processor_features.tsc_deadline_tmr_support;\n+ case HV_X64_REGISTER_U_CET:\n+ case HV_X64_REGISTER_S_CET:\n+ case HV_X64_REGISTER_PL0_SSP:\n+ case HV_X64_REGISTER_PL1_SSP:\n+ case HV_X64_REGISTER_PL2_SSP:\n+ case HV_X64_REGISTER_PL3_SSP:\n+ case HV_X64_REGISTER_INTERRUPT_SSP_TABLE_ADDR:\n+ case HV_X64_REGISTER_U_XSS:\n+ return mshv_state->processor_features.cet_ss_support ||\n+ mshv_state->processor_features.cet_ibt_support;\n }\n \n return true;\n", "prefixes": [ "23/34" ] }