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GET /api/1.1/patches/2225092/?format=api
{ "id": 2225092, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2225092/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260420104248.86702-35-mohamed@unpredictable.fr/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.1/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": "" }, "msgid": "<20260420104248.86702-35-mohamed@unpredictable.fr>", "date": "2026-04-20T10:42:44", "name": "[v2,34/38] whpx: i386: don't increment eip on MSR access raising GPF", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "c8e69434524cdbc152af214110d29b02b636f55d", "submitter": { "id": 91318, "url": "http://patchwork.ozlabs.org/api/1.1/people/91318/?format=api", "name": "Mohamed Mediouni", "email": "mohamed@unpredictable.fr" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260420104248.86702-35-mohamed@unpredictable.fr/mbox/", "series": [ { "id": 500592, "url": "http://patchwork.ozlabs.org/api/1.1/series/500592/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=500592", "date": "2026-04-20T10:42:10", "name": "WHPX x86 updates for QEMU 11.1", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/500592/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2225092/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2225092/checks/", "tags": {}, "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=gMeNcNdv;\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 4fzhzj1zgRz1yCv\n\tfor <incoming@patchwork.ozlabs.org>; Mon, 20 Apr 2026 20:48:33 +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 1wEm77-0008RV-1F; Mon, 20 Apr 2026 06:44:25 -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 <mohamed@unpredictable.fr>)\n id 1wEm74-0008PV-Sy\n for qemu-devel@nongnu.org; Mon, 20 Apr 2026 06:44:22 -0400", "from p-west3-cluster4-host9-snip4-3.eps.apple.com ([57.103.74.234]\n helo=outbound.ms.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 1wEm73-0000nf-Dn\n for qemu-devel@nongnu.org; Mon, 20 Apr 2026 06:44:22 -0400", "from outbound.ms.icloud.com (unknown [127.0.0.2])\n by p00-icloudmta-asmtp-us-west-3a-100-percent-1 (Postfix) with ESMTPS id\n B3BAA1800449; Mon, 20 Apr 2026 10:44:18 +0000 (UTC)", "from localhost.localdomain (unknown [17.57.154.37])\n by p00-icloudmta-asmtp-us-west-3a-100-percent-1 (Postfix) with ESMTPSA id\n 00DA2180014D; Mon, 20 Apr 2026 10:44:15 +0000 (UTC)" ], "Dkim-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=unpredictable.fr;\n s=sig1; t=1776681860; x=1779273860;\n bh=rPSPa9QNEGa/mspx8muwq7AvyIqsfM0CKqiZ0OTwje8=;\n h=From:To:Subject:Date:Message-ID:MIME-Version:x-icloud-hme;\n b=gMeNcNdvmjD9YpMasB5IE3dRDlj+B2WRGE9GEj9KyX7LoQSQp+lCeaJVvjp4KD/YFqLONkxgCFUDenyRh4WOQwVs4qRFlxTuATeGZGlTE0gShE2gwy1/VIfnZaX5LqlL/n8tIjSn/Ff9TXcNHHGU0YjCoXE8tq8Kh50QCFbIBMqD5oWMca0vk5G/I33tOr6Y2+6fuDjZJXw8x1Z1foMaNnrrdEAbFtS7PfcyBkdTPZY2mO3cB+j9t8En98zd6RDehtXAaMnDUTN+A5KdFFgG2Ntetj816FvDk7Xbm1u9XmOEoUfw0ZL0PZ4+6YcqKo2CGT5z2502NyGsU6dsGcf+CA==", "mail-alias-created-date": "1752046281608", "From": "Mohamed Mediouni <mohamed@unpredictable.fr>", "To": "qemu-devel@nongnu.org", "Cc": "qemu-arm@nongnu.org, Mohamed Mediouni <mohamed@unpredictable.fr>,\n Paolo Bonzini <pbonzini@redhat.com>,\n Phil Dennis-Jordan <phil@philjordan.eu>,\n Roman Bolshakov <rbolshakov@ddn.com>,\n Pierrick Bouvier <pierrick.bouvier@linaro.org>,\n Pedro Barbuda <pbarbuda@microsoft.com>, Wei Liu <wei.liu@kernel.org>,\n \"Michael S. Tsirkin\" <mst@redhat.com>,\n Peter Maydell <peter.maydell@linaro.org>, Zhao Liu <zhao1.liu@intel.com>", "Subject": "[PATCH v2 34/38] whpx: i386: don't increment eip on MSR access\n raising GPF", "Date": "Mon, 20 Apr 2026 12:42:44 +0200", "Message-ID": "<20260420104248.86702-35-mohamed@unpredictable.fr>", "X-Mailer": "git-send-email 2.50.1", "In-Reply-To": "<20260420104248.86702-1-mohamed@unpredictable.fr>", "References": "<20260420104248.86702-1-mohamed@unpredictable.fr>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Authority-Info-Out": "v=2.4 cv=IqQTsb/g c=1 sm=1 tr=0 ts=69e60383\n cx=c_apl:c_pps:t_out a=qkKslKyYc0ctBTeLUVfTFg==:117 a=A5OVakUREuEA:10\n a=VkNPw1HP01LnGYTKEx00:22 a=N0YEvnU7VqbRQIRMxcMA:9", "X-Proofpoint-GUID": "YxoqcTplDF3fAxDC33PbX8kwXAxpEfLf", "X-Proofpoint-ORIG-GUID": "YxoqcTplDF3fAxDC33PbX8kwXAxpEfLf", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNDIwMDEwNCBTYWx0ZWRfX4FBRlfBWzUCe\n ZhE+GPTlE8Oo4ykYyP6S5rm0z0HSvXqV+PuJr+Wg5mrGSkyO6+7QzC0u38Zt5wo9uEZByFePMg5\n gOmRv0BtCiQ3XmH+IQr+Xg7Axa44foryHGLgTWrrkNHNp3IAN40fm+WtMLS+extfSm3fQIYAMci\n GKpyDyrrcPdaA5I8nAKMOm16/DZ7nE2K3ee/aX0vZkQkWEn/OoPl/En2O6grs5VEugsJxT28mCE\n 1mOcUNFja0zDbyLM2A1DgHiLj1p1CAmosKh8DxvkEWHM3PNYDnPfwaDMAgeWlBEvFony22r7vmU\n TrnYr20Hmlg5z4/AVZkXt3npmWwTtMFaLw/D1SJnqFMo88IwTKEFPoP5dZWqu8=", "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=2026-04-20_02,2026-04-17_04,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=notspam policy=default score=0 bulkscore=0\n phishscore=0 spamscore=0 adultscore=0 suspectscore=0 clxscore=1030 mlxscore=0\n mlxlogscore=757 malwarescore=0 lowpriorityscore=0 classifier=spam authscore=0\n adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000\n definitions=main-2604200104", "Received-SPF": "pass client-ip=57.103.74.234;\n envelope-from=mohamed@unpredictable.fr; helo=outbound.ms.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 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": "Signed-off-by: Mohamed Mediouni <mohamed@unpredictable.fr>\n---\n target/i386/whpx/whpx-all.c | 12 ++++++++++++\n 1 file changed, 12 insertions(+)", "diff": "diff --git a/target/i386/whpx/whpx-all.c b/target/i386/whpx/whpx-all.c\nindex f9f12484c9..b0692935e7 100644\n--- a/target/i386/whpx/whpx-all.c\n+++ b/target/i386/whpx/whpx-all.c\n@@ -2179,6 +2179,7 @@ int whpx_vcpu_run(CPUState *cpu)\n WHV_REGISTER_NAME reg_names[3];\n UINT32 reg_count;\n bool is_known_msr = 0; \n+ bool raises_gpf = false;\n uint64_t val;\n \n if (vcpu->exit_ctx.MsrAccess.AccessInfo.IsWrite) {\n@@ -2211,6 +2212,7 @@ int whpx_vcpu_run(CPUState *cpu)\n is_known_msr = 1;\n if (val & MSR_IA32_APICBASE_RESERVED) {\n x86_emul_raise_exception(&X86_CPU(cpu)->env, EXCP0D_GPF, 0);\n+ raises_gpf = true;\n }\n if (!vcpu->exit_ctx.MsrAccess.AccessInfo.IsWrite) {\n /* Read path unreachable on Hyper-V */\n@@ -2220,6 +2222,7 @@ int whpx_vcpu_run(CPUState *cpu)\n int msr_ret = cpu_set_apic_base(X86_CPU(cpu)->apic_state, val);\n if (msr_ret < 0) {\n x86_emul_raise_exception(&X86_CPU(cpu)->env, EXCP0D_GPF, 0);\n+ raises_gpf = true;\n } else {\n whpx_set_reg(cpu, WHvX64RegisterApicBase, reg);\n }\n@@ -2239,6 +2242,7 @@ int whpx_vcpu_run(CPUState *cpu)\n reg_values[1].Reg64 = val;\n if (msr_ret < 0) {\n x86_emul_raise_exception(&X86_CPU(cpu)->env, EXCP0D_GPF, 0);\n+ raises_gpf = true;\n }\n } else {\n bql_lock();\n@@ -2246,6 +2250,7 @@ int whpx_vcpu_run(CPUState *cpu)\n bql_unlock();\n if (msr_ret < 0) {\n x86_emul_raise_exception(&X86_CPU(cpu)->env, EXCP0D_GPF, 0);\n+ raises_gpf = true;\n }\n }\n }\n@@ -2295,6 +2300,13 @@ int whpx_vcpu_run(CPUState *cpu)\n \n if (!is_known_msr && !whpx->ignore_unknown_msr) {\n x86_emul_raise_exception(&X86_CPU(cpu)->env, EXCP0D_GPF, 0);\n+ raises_gpf = true;\n+ }\n+\n+ /* When a GPF is raised, do not change Rip. */\n+ if (raises_gpf) {\n+ reg_values[0].Reg64 =\n+ vcpu->exit_ctx.VpContext.Rip;\n }\n \n hr = whp_dispatch.WHvSetVirtualProcessorRegisters(\n", "prefixes": [ "v2", "34/38" ] }