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GET /api/patches/2219738/?format=api
{ "id": 2219738, "url": "http://patchwork.ozlabs.org/api/patches/2219738/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260404042015.86580-8-mohamed@unpredictable.fr/", "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": "<20260404042015.86580-8-mohamed@unpredictable.fr>", "list_archive_url": null, "date": "2026-04-04T04:20:11", "name": "[v6,07/11] whpx: i386: introduce proper cpuid support", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "ffdf1f83b1429b126706ef2c0868fb1862141757", "submitter": { "id": 91318, "url": "http://patchwork.ozlabs.org/api/people/91318/?format=api", "name": "Mohamed Mediouni", "email": "mohamed@unpredictable.fr" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260404042015.86580-8-mohamed@unpredictable.fr/mbox/", "series": [ { "id": 498696, "url": "http://patchwork.ozlabs.org/api/series/498696/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=498696", "date": "2026-04-04T04:20:05", "name": "whpx: i386: bug fixes, feature probing and CPUID", "version": 6, "mbox": "http://patchwork.ozlabs.org/series/498696/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2219738/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2219738/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 (2048-bit key;\n unprotected) header.d=unpredictable.fr header.i=@unpredictable.fr\n header.a=rsa-sha256 header.s=sig1 header.b=QQNJNYqT;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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Sat, 04 Apr 2026 00:20:32 -0400", "from outbound.st.icloud.com (unknown [127.0.0.2])\n by p00-icloudmta-asmtp-us-east-1a-10-percent-0 (Postfix) with ESMTPS id\n 0DC42180015A; Sat, 04 Apr 2026 04:20:29 +0000 (UTC)", "from localhost.localdomain (unknown [17.42.251.67])\n by p00-icloudmta-asmtp-us-east-1a-10-percent-0 (Postfix) with ESMTPSA id\n B126D18000B3; Sat, 04 Apr 2026 04:20:27 +0000 (UTC)" ], "Dkim-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=unpredictable.fr;\n s=sig1; t=1775276429; x=1777868429;\n bh=d6aYMezS4K50QhpFbiouZemcvwz2NgiZB6lHAEg2j7I=;\n h=From:To:Subject:Date:Message-ID:MIME-Version:x-icloud-hme;\n b=QQNJNYqTPNoZpyzhhsmbANLws6OofvKXv8Dgq2oGqtWnDKnfQzy98KFAxp2RrO7dexOkQDibdHlXxheAjPBFruAD+55yMDRUwMSsol5KZK+EQB9X140p0jYVt7cNAHX2zoQ/DAEmk0pUgo1m6grX3A0Y6Y4qsj9FGQO3BnMTAA6X1HO3VhTzdjmqCutnNfP09Gj6nkzVq7zPMmgpx58diUvI/EWjLPXe4ptjiM0veXpEHNkunjVogdM+Alk4RqjdRoOLRR3eJc4uGB/X/Ct/S0ZEMn44kJGoJrNRbWMquab27Vqn9PZa+ZfQ/asjXjBpcyP78K+fVhePcl339nKMWQ==", "mail-alias-created-date": "1752046281608", "From": "Mohamed Mediouni <mohamed@unpredictable.fr>", "To": "qemu-devel@nongnu.org", "Cc": "Wei Liu <wei.liu@kernel.org>, Roman Bolshakov <rbolshakov@ddn.com>,\n Pedro Barbuda <pbarbuda@microsoft.com>,\n Mohamed Mediouni <mohamed@unpredictable.fr>,\n Phil Dennis-Jordan <phil@philjordan.eu>,\n Paolo Bonzini <pbonzini@redhat.com>, Zhao Liu <zhao1.liu@intel.com>", "Subject": "[PATCH v6 07/11] whpx: i386: introduce proper cpuid support", "Date": "Sat, 4 Apr 2026 06:20:11 +0200", "Message-ID": "<20260404042015.86580-8-mohamed@unpredictable.fr>", "X-Mailer": "git-send-email 2.50.1", "In-Reply-To": "<20260404042015.86580-1-mohamed@unpredictable.fr>", "References": "<20260404042015.86580-1-mohamed@unpredictable.fr>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Authority-Info-Out": "v=2.4 cv=S9/UAYsP c=1 sm=1 tr=0 ts=69d0918d\n cx=c_apl:c_pps:t_out a=YrL12D//S6tul8v/L+6tKg==:117\n a=YrL12D//S6tul8v/L+6tKg==:17 a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22\n a=8S12nBvZezfavlJVhXoA:9", "X-Proofpoint-ORIG-GUID": "tMSp58ilh-vMn4pYN5oOOLGBvNTAXgMQ", "X-Proofpoint-GUID": "tMSp58ilh-vMn4pYN5oOOLGBvNTAXgMQ", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNDA0MDAzNCBTYWx0ZWRfXw0DY6nbho7NQ\n Hj9ZSyTzg/4xZPpTjIBfzDc+Wq9+DWWn2n89GeYeOUdR9jqlQfu5Vmmv9CZYd0/B/LSJeX0YKEP\n rC1gNFJaevOjRNtZgAUVVRZwiY2jtGpGBcmf/iZsAEDrZdAjaqQ+W8Qg5mDzkoE3pzQDttxY1u+\n Q5aKHlFergxK1QLGH5M3LYQu9k1MNpu+jgK7wnsoIv5X/gls69sZqGagr3HpXmPRHsDoTIHHGqo\n jroMYWmjf2zN1rYYilmCjg5UbunGKsBX254Y1b3rrD4CcAtaVz+FRZ9TI5ySkOV82/bbp0FMI9O\n UmipJI56PZE9XiWSaZGTESs/U+tDPEGMMeIL4gJUW4ipMWu96PpCDRNwwy8eV4=", "X-Proofpoint-Virus-Version": "vendor=baseguard\n engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49\n definitions=2026-04-03_07,2026-04-03_01,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=notspam policy=default score=0 spamscore=0\n suspectscore=0 clxscore=1030 adultscore=0 lowpriorityscore=0 mlxscore=0\n malwarescore=0 mlxlogscore=840 bulkscore=0 phishscore=0 classifier=spam\n authscore=0 adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000\n definitions=main-2604040034", "Received-SPF": "pass client-ip=57.103.79.105;\n envelope-from=mohamed@unpredictable.fr; helo=outbound.st.icloud.com", "X-Spam_score_int": "-20", "X-Spam_score": "-2.1", "X-Spam_bar": "--", "X-Spam_report": "(-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_MSPIKE_H2=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_PASS=-0.001,\n 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": "Unlike the implementation in QEMU 10.2, this one works.\n\nIt's not optimal though as it doesn't use the Hyper-V support for this.\n\nSigned-off-by: Mohamed Mediouni <mohamed@unpredictable.fr>\n---\n target/i386/whpx/whpx-all.c | 39 ++++++++++++++++++++++++++++++++++---\n 1 file changed, 36 insertions(+), 3 deletions(-)", "diff": "diff --git a/target/i386/whpx/whpx-all.c b/target/i386/whpx/whpx-all.c\nindex 03233d1b94..3e006496be 100644\n--- a/target/i386/whpx/whpx-all.c\n+++ b/target/i386/whpx/whpx-all.c\n@@ -2127,6 +2127,35 @@ int whpx_vcpu_run(CPUState *cpu)\n }\n break;\n }\n+ } else {\n+ switch (vcpu->exit_ctx.CpuidAccess.Rax) {\n+ case 0x40000000:\n+ case 0x40000001:\n+ case 0x40000010:\n+ reg_values[1].Reg64 = vcpu->exit_ctx.CpuidAccess.DefaultResultRax;\n+ reg_values[2].Reg64 = vcpu->exit_ctx.CpuidAccess.DefaultResultRcx;\n+ reg_values[3].Reg64 = vcpu->exit_ctx.CpuidAccess.DefaultResultRdx;\n+ reg_values[4].Reg64 = vcpu->exit_ctx.CpuidAccess.DefaultResultRbx;\n+ break;\n+ }\n+ }\n+\n+ /* Dynamic depending on XCR0 and XSS, so query DefaultResult */\n+ if (vcpu->exit_ctx.CpuidAccess.Rax == 0x07\n+ && vcpu->exit_ctx.CpuidAccess.Rcx == 0) {\n+ if (vcpu->exit_ctx.CpuidAccess.DefaultResultRdx\n+ & CPUID_7_0_EDX_CET_IBT) {\n+ reg_values[3].Reg32 |= CPUID_7_0_EDX_CET_IBT;\n+ } else {\n+ reg_values[3].Reg32 &= ~CPUID_7_0_EDX_CET_IBT;\n+ }\n+\n+ if (vcpu->exit_ctx.CpuidAccess.DefaultResultRcx\n+ & CPUID_7_0_ECX_CET_SHSTK) {\n+ reg_values[2].Reg32 |= CPUID_7_0_ECX_CET_SHSTK;\n+ } else {\n+ reg_values[2].Reg32 &= ~CPUID_7_0_ECX_CET_SHSTK;\n+ }\n }\n \n hr = whp_dispatch.WHvSetVirtualProcessorRegisters(\n@@ -2345,8 +2374,12 @@ int whpx_accel_init(AccelState *as, MachineState *ms)\n WHV_CAPABILITY_FEATURES features = {0};\n WHV_PROCESSOR_FEATURES_BANKS processor_features;\n WHV_PROCESSOR_PERFMON_FEATURES perfmon_features;\n- UINT32 cpuidExitList[] = {1};\n- UINT32 cpuidExitList_nohyperv[] = {1, 0x40000000, 0x40000001, 0x40000010};\n+\n+ UINT32 cpuidExitList[] = {0x0, 0x1, 0x6, 0x7, 0x14, 0x24, 0x29, 0x1E,\n+ 0x40000000, 0x40000001, 0x40000010, 0x80000000, 0x80000001,\n+ 0x80000002, 0x80000003, 0x80000004, 0x80000007, 0x80000008,\n+ 0x8000000A, 0x80000021, 0x80000022, 0xC0000000, 0xC0000001};\n+ UINT32 cpuidExitList_legacy_os[] = {1, 0x40000000, 0x40000001, 0x40000010};\n \n whpx = &whpx_global;\n \n@@ -2602,7 +2635,7 @@ int whpx_accel_init(AccelState *as, MachineState *ms)\n hr = whp_dispatch.WHvSetPartitionProperty(\n whpx->partition,\n WHvPartitionPropertyCodeCpuidExitList,\n- whpx->hyperv_enlightenments_enabled ? cpuidExitList : cpuidExitList_nohyperv,\n+ !whpx_is_legacy_os() ? cpuidExitList : cpuidExitList_legacy_os,\n RTL_NUMBER_OF(cpuidExitList) * sizeof(UINT32));\n \n if (FAILED(hr)) {\n", "prefixes": [ "v6", "07/11" ] }