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([2001:b07:6468:f312:60b0:79b4:e56:bfb5]) by smtp.gmail.com with ESMTPSA id p65sm2205312wmp.36.2020.05.20.01.32.21 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 20 May 2020 01:32:22 -0700 (PDT) Subject: Re: kvm_buf_set_msrs: Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed. To: Li Feng References: <55b6466c-0769-6652-a237-c6bc18704064@redhat.com> <20200514125220.GJ2787@work-vm> <20200514151600.GO2787@work-vm> <20200514153129.GP2787@work-vm> <986fbf33-8127-870b-9163-4aa8d332553f@redhat.com> From: Paolo Bonzini Message-ID: <7ecfb762-0359-92a4-d8b3-1a9e081ace92@redhat.com> Date: Wed, 20 May 2020 10:32:21 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=207.211.31.81; envelope-from=pbonzini@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/20 04:09:34 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN 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: vkuznets@redhat.com, =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= , "Dr. David Alan Gilbert" , "open list:All patches CC here" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 20/05/20 10:22, Li Feng wrote: >> - bit 2, vmx-exit-nosave-debugctl >> - bit 9, host address space size, is handled automatically by QEMU >> - bit 15, vmx-exit-ack-intr >> - bit 17, vmx-exit-save-pat >> - bit 18, vmx-exit-load-pat >> - bit 19, vmx-exit-save-efer >> - bit 20, vmx-exit-load-efer >> - bit 21, vmx-exit-save-preemption-timer >> >> Try removing all of these and see if QEMU starts: >> >> qemu-kvm ... -cpu >> host,-vmx-exit-nosave-debugctl,-vmx-exit-ack-intr,-vmx-exit-save-pat,-vmx-exit-load-pat,-vmx-exit-save-efer,-vmx-exit-load-efer,-vmx-exit-save-preemption-timer >> >> And then add them back one at a time. > Hi, Paolo. > Thanks, the crash is still here when removing the above features: > qemu-system-x86_64: error: failed to set MSR 0x48f to 0x36fff00036dff > > After computing xor, the result is 0b1000000000. > The bit 9 is set. Are you running KVM with a 32-bit kernel. Paolo