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Tue, 1 Sep 2026 07:39:46 +0000 (GMT) Date: Tue, 1 Sep 2026 09:39:51 +0200 From: Steffen Eiden To: Karl Mehltretter Cc: Marc Zyngier , Oliver Upton , kvmarm@lists.linux.dev, Fuad Tabba , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , Will Deacon , Mark Rutland , Paolo Bonzini , Sean Christopherson , Shuah Khan , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH 2/2] KVM: arm64: selftests: Test empty SMCCC filter range at base 0 Message-ID: <20260901073951.185345-B-seiden@linux.ibm.com> References: <20260829054856.70549-1-kmehltretter@gmail.com> <20260829054856.70549-3-kmehltretter@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260829054856.70549-3-kmehltretter@gmail.com> X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Authority-Analysis: v=2.4 cv=PPc/P/qC c=1 sm=1 tr=0 ts=6a968146 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=kj9zAlcOel0A:10 a=VdqzKS8jKosA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=pGLkceISAAAA:8 a=VnNF1IyMAAAA:8 a=W70r8alv7qqp-a3mEecA:9 a=CjuIK1q_8ugA:10 X-Proofpoint-GUID: 2P8aUw_CV8LlRSgc_Pvmp2vlQptgIYHY X-Proofpoint-ORIG-GUID: 8n_R40p4sl9uWDxLGMXuorUWRYv-2vV7 X-Proofpoint-Spam-Info: AW1haW4tMjYwOTAxMDA2NiBTYWx0ZWRfX4IJxqnbD2UC/ 4OdTcIEwLrXHZ/8kOb/6c/al6fG9oZb9sYtHsZwo1t7xLtHg4VACP5XRyw02oPN1hGt0TzjZMuz 7sjK9w1JvfELuaKBvYiY7tAOITf00lI= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTAxMDA2NiBTYWx0ZWRfXwBSbsjy9Vipb w+GWMUtZxBCB2N693nCfcFTsNjNX8S5fosfGbJLaJ6jf6UWDiv6u1120qkzHS7Vg2JabJuTAmeq dOdCLk9HRkpiQBl7tu+7PplXEoeKETix4BDMIpPjqHnDkmxiaGXuK/ckz7CSw/z3f3qu36rbGKH BSdLLIluBOtelM2m2SxwX8VlAYdU43dpvnR9gQq5QVkWTmB50wzxuKDsorybrmI+SzteB7fypA4 lm1/Zt20b89DsUGol6x8S9KpTiL21+0WALOgkNXDoZm6g19NkEBo5yOCtViUbhSWNwWZII49cOX wIqJ34x+D0un3lmQ/yg8N6gLFhO+8QrVLuX8a8c3IZEeJqz07pL3/aQ0nCankunjUbRuGUYYuGG SFlSvOozATgfDhM4Wcr7AROd3SvHambAni7LIX/P3WTs5iIotCB2HcSxYzwZ/WU5tgOloyeGPQ2 TsgtVE1ScHalUzEKLNw== 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=2026-09-01_02,2026-08-31_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1011 phishscore=0 adultscore=0 suspectscore=0 bulkscore=0 spamscore=0 priorityscore=1501 impostorscore=0 malwarescore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2609010066 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260901_004006_580135_38C9521E X-CRM114-Status: GOOD ( 13.61 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Sat, Aug 29, 2026 at 07:48:56AM +0200, Karl Mehltretter wrote: > test_invalid_nr_functions() only checks an empty range at > PSCI_0_2_FN64_CPU_ON, which KVM's end < start check happens to catch. > It never exercised base 0, where the inclusive end wraps to U32_MAX > instead. > > Add the base 0 case. Without the preceding fix it fails with EEXIST. > > Assisted-by: LLM > Signed-off-by: Karl Mehltretter Reviewed-by: Steffen Eiden