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Fri, 09 Oct 2026 12:30:49 +0000 (GMT) Received: from smtpav07.fra02v.mail.ibm.com (smtpav07.fra02v.mail.ibm.com [10.20.54.106]) by smtprelay04.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 699CUhGm17826052 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 9 Oct 2026 12:30:43 GMT Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3C0A920040; Fri, 9 Oct 2026 12:30:43 +0000 (GMT) Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 851DE2004B; Fri, 9 Oct 2026 12:30:40 +0000 (GMT) Received: from li-fbf77acc-29ba-11b2-a85c-e8e934f50a46.ibmuc.com (unknown [9.39.27.243]) by smtpav07.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 9 Oct 2026 12:30:40 +0000 (GMT) From: Gautam Menghani To: maddy@linux.ibm.com, npiggin@gmail.com, mpe@ellerman.id.au, chleroy@kernel.org, ritesh.list@gmail.com, sshegde@linux.ibm.com, amachhiw@linux.ibm.com Cc: linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 0/4] Fixes for KVM HV around synchronization and initializations Date: Fri, 9 Oct 2026 18:00:29 +0530 Message-ID: <20261009123035.157770-1-gautam@linux.ibm.com> X-Mailer: git-send-email 2.56.0 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-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-Spam-Info: AW1haW4tMjYxMDA5MDA0OCBTYWx0ZWRfX2BAg0WJBSOSp /b9G67FepRJqpKcnUOzQgnBVS2jDliPMZiNTVM81PBNsf+JtzH9BnswhJ+QvqBR1LJ5qJOq78YC LU+99sV0R89eybH7FDIdvu8hybx/zi8= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDA5MDA0OCBTYWx0ZWRfX53FcjSiun0+W ai/sA29Wu5JXp9fF11pgR5I5z/OL/dHQbxEST0MvXGF81Wu7lNBNfhsb2Vrt1zGn3fY450hEkdQ xXgYtTLkYncqYO3Ft5l2C39bvZUyt9adWATwffKtDCH6bCTD4mTgYmcxgPMgDwCcqeID50bZT+m NVtQ+qnkbDCssNF7s+Ov8vguIbrmY6w5MQOEBmC77V2jaY1Iz1/FhPbYP7dpZGIXQ6ybFVvxIKe nivQOmX1b4PjPt6eJY8ALP7uRnYyEoDio8BLRhGL6Y/n3ri1bhu3KV1Yi/Cn34ATVCdpRrIlAYB 1WkFckIp3GVu9d3517QEw5wHpdEtH2x/f3Kd2/rNIaEPZgYrJiu1S+eAFH2PbT7yVE3ePgJlCsY euFADd+u9p4r9gBe4A/uKBO8c2dEsETcpxn4tfdUgxq/0sxwf3CMritHyBW9K0OEPpxdhyuKWBP nBp0H2D/TAhd8zuZNwA== X-Proofpoint-GUID: s7n4stqpeOyKnC2vdPMLbwJgZwd-PuZ6 X-Proofpoint-ORIG-GUID: 5vPQOMual2lPFAUoaZ60g1h8UxgOaoes X-Authority-Analysis: v=2.4 cv=XcwcX455 c=1 sm=1 tr=0 ts=6ac8de7a cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=660iZSQnnn4A:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=Y2IxJ9c9Rs8Kov3niI8_:22 a=3shF3zVF4xkQSgwXEr4A:9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-10-09_03,2026-10-08_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 lowpriorityscore=0 priorityscore=1501 phishscore=0 malwarescore=0 bulkscore=0 adultscore=0 spamscore=0 suspectscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610020000 definitions=main-2610090048 This series contains the fixes for synchronization and initializations bugs in the KVM HV code. Patch 1: Fix for concurrent calls to idr_alloc Patch 2: Initialize the arch.irq_type correctly for cleanup to work Patch 3: In the cleanup function, add a check to avoid NULL ptr dereference. Patch 4: Add a srcu lock to fix "suspicious usage of rcu_dereference_check" usage. v1 -> v2: 1. Avoid NULL pointer dereference when calling kvmppc_xive_cleanup_vcpu(). Split this in a separate patch (patch 3) Gautam Menghani (4): KVM: PPC: Book3S HV: Ensure that calls to idr_alloc are synchronized KVM: PPC: Book3S HV: XICS: Update irq_type for cleanup to work KVM: PPC: Book3S HV: XICS: Avoid masking VP IPI on init failure KVM: PPC: Book3s HV: Take SRCU read lock around kvmppc_h_page_init() call arch/powerpc/kvm/book3s_hv.c | 2 ++ arch/powerpc/kvm/book3s_hv_nested.c | 34 +++++++++-------------------- arch/powerpc/kvm/book3s_xive.c | 5 +++-- 3 files changed, 15 insertions(+), 26 deletions(-) -- 2.55.0