Re: kvm_buf_set_msrs: Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed.

[Li Feng]

Paolo Bonzini <address@hidden> 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
>