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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> <7ecfb762-0359-92a4-d8b3-1a9e081ace92@redhat.com> From: Paolo Bonzini Message-ID: <5902006b-655a-9208-796d-1af7b36da52c@redhat.com> Date: Wed, 20 May 2020 11:34:06 +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=205.139.110.61; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/20 02:22:41 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_H2=-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" , qemu-devel Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 20/05/20 10:55, Li Feng wrote: >>> After computing xor, the result is 0b1000000000. >>> The bit 9 is set. >> Are you running KVM with a 32-bit kernel. >> > No, I'm running 64 bit. > > $ uname -a > Linux 31_216 5.6.7-1.el7.centos.x86_64 #1 SMP Mon Apr 27 15:26:08 CST > 2020 x86_64 x86_64 x86_64 GNU/Linux Can you do "rdmsr 0x48f" (as root)? On my machine for example I get 1ffffff00036dfb. Thanks, Paolo