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Tue, 17 Feb 2026 10:44:18 +0100 (CET) Subject: [Linux PPC] KVM PR and KVM HV do not work if the kernel was compiled with PREEMPT To: Shrikanth Hegde , linuxppc-dev , "kvm-ppc@vger.kernel.org" Cc: "R.T.Dickinson" , hypexed@yahoo.com.au, mad skateman , Christian Zigotzky References: <185d7a42-f7b4-44e1-a129-f5989d211c74@linux.ibm.com> <40154f6a-39da-959d-e039-5ab9ff62db3c@xenosoft.de> <709b864f-9daa-4a48-b3d6-39baedce63b2@linux.ibm.com> From: Christian Zigotzky Organization: A-EON Open Source Message-ID: Date: Tue, 17 Feb 2026 10:44:18 +0100 X-Mailer: BrassMonkey/33.9.1 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 In-Reply-To: <709b864f-9daa-4a48-b3d6-39baedce63b2@linux.ibm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 17/02/26 10:03, Shrikanth Hegde wrote: > > > On 2/17/26 2:22 PM, Christian Zigotzky wrote: >> Hi, >> >> Thank you for your patch. I tested the latest git kernel with your >> patch today. Unfortunately the system freezes while booting the VM >> with KVM HV. >> >> Cheers, >> Christian >> >> > Would it be possible to share the console log or boot log of KVM to the > point it freezes? Unfortunately there aren't any error messages. I also tried it with: gdb --args qemu-system-ppc64 -M ppce500 -cpu e5500 -m 1024 -kernel uImage-7.0-preempt -drive format=raw,file=void-live-powerpc-20230317-updated2.img,index=0,if=virtio -netdev user,id=mynet0 -device virtio-net,netdev=mynet0 -append "rw root=/dev/vda" -device virtio-gpu-pci -device virtio-mouse-pci -device virtio-keyboard-pci -enable-kvm -smp 4 and with gdb in the guest: qemu-system-ppc64 -s -S -M ppce500 -cpu e5500 -m 1024 -kernel uImage-7.0-preempt -drive format=raw,file=void-live-powerpc-20230317-updated2.img,index=0,if=virtio -netdev user,id=mynet0 -device virtio-net,netdev=mynet0 -append "rw root=/dev/vda" -device virtio-gpu-pci -device virtio-mouse-pci -device virtio-keyboard-pci -enable-kvm -smp 4 The system freezed without any error messages. -- Sent with BrassMonkey 33.9.1 (https://github.com/chzigotzky/Web-Browsers-and-Suites-for-Linux-PPC/releases/tag/BrassMonkey_33.9.1)