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. Paolo
