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Sat, 14 Feb 2026 15:02:22 +0100 (CET) Message-ID: Date: Sat, 14 Feb 2026 15:02:21 +0100 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 User-Agent: Mozilla Thunderbird Content-Language: de-DE To: linuxppc-dev , "kvm-ppc@vger.kernel.org" Cc: "R.T.Dickinson" , hypexed@yahoo.com.au, mad skateman , Christian Zigotzky From: Christian Zigotzky Subject: [Linux PPC] KVM PR and KVM HV do not work if the kernel was compiled with PREEMPT Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hello, KVM PR and KVM HV do not work if the kernel was compiled with PREEMPT. The entire FSL Cyrus+ board freezes when using KVM HV with PREEMPT. The guest kernel doesn't boot if we use KVM PR with a PREEMPT kernel on the PA Semi Nemo board. We were previously able to disable PREEMPT in the kernel configuration, but the latest git kernels now enable it by default and it is no longer possible to disable it. I created a patch for disabling PREEMPT today. [1] Is it possible to let us decide whether to activate PREEMPT or not? Thanks in advance, Christian [1] https://raw.githubusercontent.com/chzigotzky/kernels/a74fa6179eaeafcea7ad89f0e61c30ace038daf2/patches/X1000/Kconfig.preempt.patch [2] Bug report: https://github.com/chzigotzky/kernels/issues/19