2016-06-21 18:10 GMT+08:00 Paolo Bonzini <pbonz...@redhat.com>: > > > On 21/06/2016 08:08, Wanpeng Li wrote: >> Cc KVM ML, Paolo, Radim, >>>> FYI, raw QEMU command line is: >>>> >>>> qemu-system-x86_64 -enable-kvm -cpu SandyBridge -kernel >>>> /pkg/linux/x86_64-randconfig-w0-06180628/gcc-6/19fa5e73647fde1e6a7038a8f05cddf4c43f08d3/vmlinuz-4.7.0-rc3-00009-g19fa5e7 >>>> -append 'root=/dev/ram0 user=lkp >>>> job=/lkp/scheduled/vm-kbuild-yocto-x86_64-32/bisect_boot-1-yocto-minimal-x86_64.cgz-x86_64-randconfig-w0-06180628-19fa5e73647fde1e6a7038a8f05cddf4c43f08d3-20160618-25535-h82bax-0.yaml~ >>>> ARCH=x86_64 kconfig=x86_64-randconfig-w0-06180628 >>>> branch=internal-eywa/master >>>> commit=19fa5e73647fde1e6a7038a8f05cddf4c43f08d3 >>>> BOOT_IMAGE=/pkg/linux/x86_64-randconfig-w0-06180628/gcc-6/19fa5e73647fde1e6a7038a8f05cddf4c43f08d3/vmlinuz-4.7.0-rc3-00009-g19fa5e7 >>>> max_uptime=600 >>>> RESULT_ROOT=/result/boot/1/vm-kbuild-yocto-x86_64/yocto-minimal-x86_64.cgz/x86_64-randconfig-w0-06180628/gcc-6/19fa5e73647fde1e6a7038a8f05cddf4c43f08d3/0 >>>> LKP_SERVER=inn earlyprintk=ttyS0,115200 systemd.log_level=err debug >>>> apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 >>>> panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 >>>> prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal rw >>>> ip=::::vm-kbuild-yocto-x86_64-32::dhcp drbd.minor_count=8' -initrd >>>> /fs/sdh1/initrd-vm-kbuild-yocto-x86_64-32 -m 320 -smp 1 -device >>>> e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog >>>> i6300esb -rtc base=localtime -drive >>>> file=/fs/sdh1/disk0-vm-kbuild-yocto-x86_64-32,media=disk,if=virtio >>>> -pidfile /dev/shm/kboot/pid-vm-kbuild-yocto-x86_64-32 -serial >>>> file:/dev/shm/kboot/serial-vm-kbuild-yocto-x86_64-32 -daemonize -display >>>> none -monitor null >>>> >>> This problem was caused due to kvm does not support >>> MSR_PLATFORM_INFO(0xce), >>> according to Wanpeng's feedback. >>> >>> Hi Wanpeng, is it possible for kvm to simulate this MSR, otherwise we >>> might have to use >>> rdmsr_safe instead. >> >> There is a thread discussed this before >> https://patchwork.kernel.org/patch/8833021/, MSR_PLATFORM_INFO can't >> be simple emulation. >> >> Ping Paolo, Radim. :) > > rdmsr_safe must be used instead. I'll prepare a patch.
Actually I have such a patch on hand under testing, I will send out soon. :) Regards, Wanpeng Li
