Paolo Bonzini <pbonz...@redhat.com> 于2020年5月20日周三 下午4:32写道： > > 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. > 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 $ cat /boot/config-5.6.7-1.el7.centos.x86_64 | grep -i x86_64 # Linux/x86_64 5.6.7-1.el7.centos.x86_64 Kernel Configuration CONFIG_X86_64=y CONFIG_ARCH_DEFCONFIG="arch/x86/configs/x86_64_defconfig" > Paolo >
