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[83.57.175.68]) by smtp.gmail.com with ESMTPSA id k15sm12593212wmj.6.2021.02.19.09.36.49 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 19 Feb 2021 09:36:50 -0800 (PST) Subject: Re: [PATCH 0/7] hw/kvm: Exit gracefully when KVM is not supported To: Claudio Fontana , qemu-devel@nongnu.org References: <20210219114428.1936109-1-philmd@redhat.com> <89bb6db0-0411-e219-3df8-8300664b54f3@suse.de> From: =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= Message-ID: Date: Fri, 19 Feb 2021 18:36:48 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.0 MIME-Version: 1.0 In-Reply-To: <89bb6db0-0411-e219-3df8-8300664b54f3@suse.de> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=philmd@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=216.205.24.124; envelope-from=philmd@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Cornelia Huck , kvm@vger.kernel.org, David Hildenbrand , Mark Cave-Ayland , Aleksandar Rikalo , "Edgar E. Iglesias" , Huacai Chen , Halil Pasic , Christian Borntraeger , =?UTF-8?Q?Herv=c3=a9_Poussineau?= , Leif Lindholm , Thomas Huth , Eduardo Habkost , Alistair Francis , Richard Henderson , Greg Kurz , qemu-s390x@nongnu.org, qemu-arm@nongnu.org, David Gibson , Radoslaw Biernacki , =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= , qemu-ppc@nongnu.org, Paolo Bonzini , Aurelien Jarno Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 2/19/21 1:34 PM, Claudio Fontana wrote: > On 2/19/21 12:44 PM, Philippe Mathieu-Daudé wrote: >> Hi, >> >> This series aims to improve user experience by providing >> a better error message when the user tries to enable KVM >> on machines not supporting it. >> >> Regards, >> >> Phil. > > Hi Philippe, not sure if it fits in this series, > > but also the experience of a user running on a machine with cortex-a72, > choosing that very same cpu with -cpu and then getting: > > qemu-system-aarch64: kvm_init_vcpu: kvm_arch_init_vcpu failed (0): Invalid argument > > is not super-friendly. Maybe some suggestion to use -cpu host with KVM could be good? I agree this should be improved, but it is out of the scope of this series :)