From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BBBDBC531D0 for ; Thu, 30 Jul 2026 05:42:30 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4h9dPT3pMnz2ygJ; Thu, 30 Jul 2026 15:42:05 +1000 (AEST) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=148.163.156.1 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1785390125; cv=none; b=a1bCs6BRW77IPZMCoFGtg4Ws2vRoN0RgqOVTmeU5ZSc1VFf3bEwh1Wv4nPlqai7XOyfSNWpJMGYqsiCs3eAVDQz6KCXKg56GJTqmxUfRMm8kn1CmYjGwIrYWG29aDYLK/xN0JCHOpRam/ONxRoZREFxOUiZIGoUOxhtXgXokWiS2flQkCqNDKQFIsC4e6RZKVUs/4RphLzyt6HWVpJdfjTFB9kSUW8DaSjbAUFTirn4M42tWCxIPfqHe0yjMYHoDBM80ZF/gMJAPqyHx1kDNT2wymiyUxaehQjvGF1hAX3gKCv5Jw/uaww7fDsAkZFIq+LmRr11drfQlB2zm6Ylv3g== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1785390125; c=relaxed/relaxed; bh=zO+kKLTHSIWIieSIJ1wvyDHRb4rNeWyfVW5/euVdhWs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=KhciigFffGLqOj7/kQ/TZ0MsOk0TIfSNI3oE+gZhLcn1WjoY8sOSmX7pZ27dMSUC7eLt84qRF6CQgPHPoI+GIrWPHu5JRjnVj0p+Mbj/vEPK741q7EYqH5PsTiAsteQGSAUv/5Vys4UoU9Pe5EFgVeucUhaR2IUEqkgWiJcmR75YPDvh1TRQtTINKG1WrkA5654c+5Gk32s0gK/IWaBDxcxWbAm7MrbcydooK/UE5vWBBkE58lUaNx5WP7sY5HLLdiGZddNhWconE2chqtcwyzvonQjcvt6AL0wgTPmzqit5jYbegUJVDlEr3T/GTfdm9NGz+srFlmaLBhY3QSjgFw== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=mulPILT+; dkim-atps=neutral; spf=pass (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=maddy@linux.ibm.com; receiver=lists.ozlabs.org) smtp.mailfrom=linux.ibm.com Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=mulPILT+; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=maddy@linux.ibm.com; receiver=lists.ozlabs.org) Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4h9dPS5xJkz2xwH for ; Thu, 30 Jul 2026 15:42:04 +1000 (AEST) Received: from pps.filterd (m0356517.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 66U3lhkt1933940; Thu, 30 Jul 2026 05:41:57 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=pp1; bh=zO+kKL THSIWIieSIJ1wvyDHRb4rNeWyfVW5/euVdhWs=; b=mulPILT+c75ufburH2ztYe oiitT1ksIIVHLYnkHJK+vpfiib5EzuK59Tqet5SWL2uHB5h3SWnY+qWGTxp2hNdH oQjYp6DqTWlmD73NnoKxJHuVl4WNqOnEQjY4Y72aiTSgQY+e5BQATPjukLJsVW23 4T5cfIQFpTw4fv02OyevJ3vPAuigVHJsHDP5slWunvdidfrOUABtEC9JQ1zFoKmb T7L+kRkbVSGGLpSAkkgKHfmD99P3ZRHF9fRQ3K0mKwVG2KnIwS+hhYVAZl6iq59g NMbAqCRgTNSuCCxWavhbzJXwRAaUBh9W4ka0p1pndANttOnit8TjKpdEiXIzf5sQ == Received: from ppma12.dal12v.mail.ibm.com (dc.9e.1632.ip4.static.sl-reverse.com [50.22.158.220]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4fmv0xx7cp-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 30 Jul 2026 05:41:57 +0000 (GMT) Received: from pps.filterd (ppma12.dal12v.mail.ibm.com [127.0.0.1]) by ppma12.dal12v.mail.ibm.com (8.18.1.7/8.18.1.7) with ESMTP id 66U5fIeL027071; Thu, 30 Jul 2026 05:41:56 GMT Received: from smtprelay05.fra02v.mail.ibm.com ([9.218.2.225]) by ppma12.dal12v.mail.ibm.com (PPS) with ESMTPS id 4fn7fqj45s-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 30 Jul 2026 05:41:56 +0000 (GMT) Received: from smtpav07.fra02v.mail.ibm.com (smtpav07.fra02v.mail.ibm.com [10.20.54.106]) by smtprelay05.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 66U5fqhj51052836 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 30 Jul 2026 05:41:53 GMT Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D363B20040; Thu, 30 Jul 2026 05:41:52 +0000 (GMT) Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CD1A520043; Thu, 30 Jul 2026 05:41:50 +0000 (GMT) Received: from Linuxdev.ibmuc.com (unknown [9.43.85.187]) by smtpav07.fra02v.mail.ibm.com (Postfix) with ESMTP; Thu, 30 Jul 2026 05:41:50 +0000 (GMT) From: Madhavan Srinivasan To: linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, kvm-ppc@vger.kernel.org, Vaibhav Jain Cc: Michael Ellerman , Anushree Mathur Subject: Re: [PATCH 1/2] powerpc/pseries: Ensure vpa,slb_shadow & dtl are unregistered during crash Date: Thu, 30 Jul 2026 11:11:49 +0530 Message-ID: <178538948384.1278583.17569895854995042280.b4-ty@linux.ibm.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260708015802.274271-1-vaibhav@linux.ibm.com> References: <20260708015802.274271-1-vaibhav@linux.ibm.com> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: p-L9qlClgLkOrwOgvbvvV0xiL3YoXpsf X-Proofpoint-ORIG-GUID: p-L9qlClgLkOrwOgvbvvV0xiL3YoXpsf X-Proofpoint-Spam-Info: AW1haW4tMjYwNzMwMDAzMyBTYWx0ZWRfX4CHozPO0K8ZO ZJRBxalwPseIkm/FLAdOe8lEk7yvpMU8MrCgvkyZnESi1dKIpZBJNDL8Eeai5oaqq1rdMSRfVMX rbHD5TbKXa+TTfdI2UhvE7lIt7GjqmA= X-Authority-Analysis: v=2.4 cv=dYuwG3Xe c=1 sm=1 tr=0 ts=6a6ae425 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=U7nrCbtTmkRpXpFmAIza:22 a=VwQbUJbxAAAA:8 a=s8vH8uGDgdFwIMWCMQ4A:9 a=QEXdDO2ut3YA:10 a=zZCYzV9kfG8A:10 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzMwMDAzMyBTYWx0ZWRfX8ZDHGDd7HCtu 6CBC8EqqsTnnmi1gvIh4gKNS7eb06E9tkeQPH7YHxPMI9HGerryBL7wWsGqqAUluGYtn6Z+SsCD s5/vxZMMvxbWg+I/WgObUNAIJu+B4pL/Y/R9h7cYVRJSxO4fBW2A0n3XUfqIO7A1GzGoa3rl52Z nU2J2WDG8tMuFjV8cnYJ9k+XvrvksnfHZhNmLrHO4O9xnu/1ZZUz1+f3mZqYklgkMJOGcGm/dLa SpZ4/WyYL4EZP+LaDCcvyDDkJFo+2frKA/d1u8/qUceXpHC8KCrLaZ8lav8pZJY+h8qM2i3VH25 kj4CCpgoO/szsn4tsCND8ylnIbSXSrItrB7etwAR+9iSQyrmLoE5AkckZWFn5v02C99AJ6/uy5q AjR5+hNkXM+C7zqlL+fC30KfBAALd37I4LQBiCjrdKHOFDCWC+XhaIXodQYToeP3kJi60f6hnWI uy7ANvVk+UjEkeXJ1Yg== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-30_01,2026-07-29_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 impostorscore=0 clxscore=1011 phishscore=0 malwarescore=0 spamscore=0 lowpriorityscore=0 bulkscore=0 suspectscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607300033 On Wed, 08 Jul 2026 07:28:00 +0530, Vaibhav Jain wrote: > Currently pseries_kexec_cpu_down() skips unregistering vpa, slb_shadow and > dtl areas during a crash and kexec shutdown path. It was done to avoid > doing an HCALL while crashing. However recently Anushree reported that > during kernel crash while the kdump kernel was coming up, Hypervisor > reported invalid values for 'vpa.yield_count' while it dispatching L2-KVM > Guest vcpus. The error manifested as debug build Hypervisor assert > triggering to indicate possible VPA corruption. > > [...] Applied to powerpc/fixes. [1/2] powerpc/pseries: Ensure vpa,slb_shadow & dtl are unregistered during crash https://git.kernel.org/powerpc/c/810d07fb4cf7577847f85a6fd6273b69cad8d580 cheers