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GET /api/patches/2219427/?format=api
{ "id": 2219427, "url": "http://patchwork.ozlabs.org/api/patches/2219427/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260402234724.88276-8-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": "<20260402234724.88276-8-mohamed@unpredictable.fr>", "list_archive_url": null, "date": "2026-04-02T23:47:24", "name": "[v3,7/7] 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/20260402234724.88276-8-mohamed@unpredictable.fr/mbox/", "series": [ { "id": 498566, "url": "http://patchwork.ozlabs.org/api/series/498566/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=498566", "date": "2026-04-02T23:47:19", "name": "whpx: i386: x2apic emulation for kernel-irqchip=off, feature probing", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/498566/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2219427/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2219427/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=a9cu3H8i;\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=lists.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from lists.gnu.org (lists.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 4fmz8c1xLWz1xtJ\n\tfor <incoming@patchwork.ozlabs.org>; Fri, 03 Apr 2026 10:49:04 +1100 (AEDT)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1w8RlL-0004Ih-JB; Thu, 02 Apr 2026 19:47:47 -0400", "from eggs.gnu.org ([2001:470:142:3::10])\n by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <mohamed@unpredictable.fr>)\n id 1w8RlL-0004IJ-0K\n for qemu-devel@nongnu.org; Thu, 02 Apr 2026 19:47:47 -0400", "from p-west2-cluster6-host7-snip4-3.eps.apple.com ([57.103.70.46]\n helo=outbound.mr.icloud.com)\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <mohamed@unpredictable.fr>)\n id 1w8RlJ-000445-Fv\n for qemu-devel@nongnu.org; Thu, 02 Apr 2026 19:47:46 -0400", "from outbound.mr.icloud.com (unknown [127.0.0.2])\n by p00-icloudmta-asmtp-us-west-2a-60-percent-6 (Postfix) with ESMTPS id\n C91FD180015B; Thu, 02 Apr 2026 23:47:42 +0000 (UTC)", "from localhost.localdomain (unknown [17.57.152.38])\n by p00-icloudmta-asmtp-us-west-2a-60-percent-6 (Postfix) with ESMTPSA id\n D4A641800156; Thu, 02 Apr 2026 23:47:40 +0000 (UTC)" ], "Dkim-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=unpredictable.fr;\n s=sig1; t=1775173664; x=1777765664;\n bh=c5D9ZkT8JYejwpSreaiXIWK6zThn9vhXnnKzmMKMQA8=;\n h=From:To:Subject:Date:Message-ID:MIME-Version:x-icloud-hme;\n b=a9cu3H8ir8YZrH4GRrVEPaTfdTUzCIaMBHXflqpE7Xh0F0r69qMLZunGlkmw1rM2rhjxF4/OiPFpkLy04FpPX3HYo6yRE1cDYS60X8MSwpk9+3o6Sjx1L6m0afMyWT8iusT0QQ2mOney0VavodvUZnra4Uo71k7Gvt6pLts07bmvm/6q8cknqx33uI8rRNDnHz4B7E6VJZ38tBcROxDMhXO/jJIbVVhAGeSH3HzZKGj/ixJ9xnq6stWwzg31Qvm+cK9HovfP+KUrKItE6HvexSVrXADsDt0npcsLU42ZX/Z/xxJ3kV3XOx2WPS2RJJYhLbVT/kORKPaYp07iDkmSnA==", "mail-alias-created-date": "1752046281608", "From": "Mohamed Mediouni <mohamed@unpredictable.fr>", "To": "qemu-devel@nongnu.org", "Cc": "Mohamed Mediouni <mohamed@unpredictable.fr>,\n Phil Dennis-Jordan <phil@philjordan.eu>,\n Roman Bolshakov <rbolshakov@ddn.com>, Zhao Liu <zhao1.liu@intel.com>,\n Paolo Bonzini <pbonzini@redhat.com>,\n Pedro Barbuda <pbarbuda@microsoft.com>, Wei Liu <wei.liu@kernel.org>", "Subject": "[PATCH v3 7/7] whpx: i386: introduce proper cpuid support", "Date": "Fri, 3 Apr 2026 01:47:24 +0200", "Message-ID": "<20260402234724.88276-8-mohamed@unpredictable.fr>", "X-Mailer": "git-send-email 2.50.1", "In-Reply-To": "<20260402234724.88276-1-mohamed@unpredictable.fr>", "References": "<20260402234724.88276-1-mohamed@unpredictable.fr>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Proofpoint-ORIG-GUID": "E4_OygPwFSxY6QwKw45HzQ0rh4__zHNn", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNDAyMDIxMyBTYWx0ZWRfX6DNTH7dthynF\n 4iO5E7J1Fqy9VKFNijndCr+CatOrMyVqEZslnpoH1vdbk0QAXm2u9lRXSNLjrYK5Zwmtr5wb2qL\n nxdVcw/f32GIjm4L4M2FbI++FPxm1L99ueP0aA2gV0nUgTvAHa5Okx2DfibwSmuNZMYJCUR3JYl\n XcLqWRt160ebU7SXAgyCL8hmWN/ymz/63h5EXVNY8s2oghC7kl+9vsRydjh4UslkN8dk5qXJv/2\n b65rtbVWcT2ggcV3NtGhXZrO5ycOsqYIjuPzCxFmnsvGk3LOZQqJ3/UhDUuEaXEiObk+48OKb4Y\n iGanheFsJZjFp3VXSQ34TJzFXJ23Fd5wnkSbEm6SRB5JCXaMlh/nAGA2cC6TlA=", "X-Proofpoint-GUID": "E4_OygPwFSxY6QwKw45HzQ0rh4__zHNn", "X-Authority-Info-Out": "v=2.4 cv=KuBAGGWN c=1 sm=1 tr=0 ts=69cf001f\n cx=c_apl:c_pps:t_out a=9OgfyREA4BUYbbCgc0Y0oA==:117\n a=9OgfyREA4BUYbbCgc0Y0oA==:17 a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22\n a=8S12nBvZezfavlJVhXoA:9", "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=2026-04-02_04,2026-04-02_05,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=notspam policy=default score=0 adultscore=0\n clxscore=1030 spamscore=0 phishscore=0 bulkscore=0 mlxscore=0 mlxlogscore=841\n suspectscore=0 lowpriorityscore=0 malwarescore=0 classifier=spam authscore=0\n adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000\n definitions=main-2604020213", "Received-SPF": "pass client-ip=57.103.70.46;\n envelope-from=mohamed@unpredictable.fr; helo=outbound.mr.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_VALIDITY_CERTIFIED_BLOCKED=0.001,\n RCVD_IN_VALIDITY_RPBL_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": "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 483a15ffdc..536657e43a 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": [ "v3", "7/7" ] }