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Content-Language: en-US To: Marc Zyngier Cc: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, oliver.upton@linux.dev, darren@os.amperecomputing.com, d.scott.phillips@amperecomputing.com References: <20240305054606.13261-1-gankulkarni@os.amperecomputing.com> <86sf150w4t.wl-maz@kernel.org> <6685c3a6-2017-4bc2-ad26-d11949097050@os.amperecomputing.com> <86r0go201z.wl-maz@kernel.org> From: Ganapatrao Kulkarni In-Reply-To: <86r0go201z.wl-maz@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: CH5PR04CA0003.namprd04.prod.outlook.com (2603:10b6:610:1f4::12) To SJ2PR01MB8101.prod.exchangelabs.com (2603:10b6:a03:4f6::10) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ2PR01MB8101:EE_|PH7PR01MB7702:EE_ X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Maintenance interrupts are more or less broken. I'm > slowly plugging PAuth, but there's no testing whatsoever (running > Linux doesn't count). Lack of SVE support is also definitely a > blocker. > I am debugging an issue where EDK2(ArmVirtPkg) boot hangs when tried to boot from L1 using QEMU. The hang is due to failure of AT instruction and resulting in immediate return to Guest(L2) and the loop continues... AT instruction is executed in function of __get_fault_info(__translate_far_to_hpfar) in L1 when data abort is forwarded. Then AT instruction is trapped and executed/emulated in L0 in function "__kvm_at_s1e01" is failing and resulting in the return to guest. Is this also the manifestation of the issue of AT that you are referring to? Thanks, Ganapat