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Bug 1326721 - Warning occur when emulate AMD CPU by cmd "/usr/libexec/qemu-kvm -cpu host"
Summary: Warning occur when emulate AMD CPU by cmd "/usr/libexec/qemu-kvm -cpu host"
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: qemu-kvm-rhev
Version: 7.3
Hardware: Unspecified
OS: Unspecified
unspecified
medium
Target Milestone: rc
: ---
Assignee: Radim Krčmář
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-04-13 11:18 UTC by aihua liang
Modified: 2017-06-13 04:00 UTC (History)
11 users (show)

Fixed In Version: qemu-kvm-rhev-2.6.0-1.el7
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2017-06-13 04:00:51 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description aihua liang 2016-04-13 11:18:00 UTC 
Description of problem:

  When emulate AMD CPU via qemu-kvm param "-cpu host", warning occur.
  
  When set param "-cpu Opteron_G3",qemu-kvm works well.


Version-Release number of selected component (if applicable):

  host kernel:3.10.0-371.el7.x86_64
  qemu-kvm version:qemu-kvm-rhev-2.5.0-4.el7
  seabios version:seabios-1.9.1-2.el7.x86_64


How reproducible:
100%


Steps to Reproduce:

1.Start VM by following cmd:
/usr/libexec/qemu-kvm -name rhel7.1-4 \
-machine pc \
-cpu host \
-m 4096 \
-smp 1,sockets=1 \
-uuid 1534fa42-4818-4493-9f67-eee5ba758385 \
-no-user-config -nodefaults \
-chardev socket,id=qmp_id_catch_monitor,path=/var/tmp/test1,server,nowait \
-mon chardev=qmp_id_catch_monitor,id=monitor,mode=control \
-boot menu=on,splash-time=12000 \
-device virtio-scsi-pci,id=scsi0,bus=pci.0,addr=0x5 \
-drive file=/home/target1.qcow2,if=none,id=drive-ide0-0-0,format=qcow2,aio=threads \
-device scsi-hd,bus=scsi0.0,drive=drive-ide0-0-0,id=scsi0-0-1,bootindex=1 \
-enable-kvm \
-spice port=3008,ipv4,disable-ticketing \
-vga qxl \
-vnc 0:2 \
-monitor stdio


Actual results:
   1. VM Started with warnings:
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 1]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 2]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 3]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 4]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 5]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 6]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 7]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 8]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 9]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 12]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 13]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 14]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 15]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 16]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 17]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 23]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 24]

    2. Check Host CPU info:
#lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                64
On-line CPU(s) list:   0-63
Thread(s) per core:    2
Core(s) per socket:    8
座：                 4
NUMA 节点：         8
厂商 ID：           AuthenticAMD
CPU 系列：          21
型号：              2
型号名称：        AMD Opteron(tm) Processor 6376
步进：              0
CPU MHz：             2294.286
BogoMIPS：            4588.00
虚拟化：           AMD-V
L1d 缓存：          16K
L1i 缓存：          64K
L2 缓存：           2048K
L3 缓存：           6144K
NUMA 节点0 CPU：    0,4,8,12,16,20,24,28
NUMA 节点1 CPU：    32,36,40,44,48,52,56,60
NUMA 节点2 CPU：    1,5,9,13,17,21,25,29
NUMA 节点3 CPU：    33,37,41,45,49,53,57,61
NUMA 节点4 CPU：    2,6,10,14,18,22,26,30
NUMA 节点5 CPU：    34,38,42,46,50,54,58,62
NUMA 节点6 CPU：    35,39,43,47,51,55,59,63
NUMA 节点7 CPU：    3,7,11,15,19,23,27,31

    Summary:qemu-kvm can't translate param "-cpu host" to the correct AMD CPU.


Expected results:

 Qemu-kvm can emulate AMD CPU via param "-cpu host" correctly.

Additional info:
Comment 2 Radim Krčmář 2016-04-18 14:17:01 UTC 
Patch posted upstream, http://lists.nongnu.org/archive/html/qemu-devel/2016-04/msg02597.html
Comment 3 Radim Krčmář 2016-07-19 14:26:32 UTC 
This bug has been fixed patch 9997cf7bdac0 ("target-i386: Set AMD alias bits after filtering CPUID data") that was included in rebase to QEMU 2.6.
Comment 4 Gu Nini 2016-07-22 09:48:19 UTC 
Aihua,

Could you help to verify the bug after the fix? Then we can set the bug status to be verified.

Thanks!
Nini
Comment 5 aihua liang 2016-07-22 10:12:09 UTC 
(In reply to Gu Nini from comment #4)
> Aihua,
> 
> Could you help to verify the bug after the fix? Then we can set the bug
> status to be verified.
> 
> Thanks!
> Nini

Nini,

  Will reply next week for no resource now...

aliang
Comment 6 aihua liang 2016-07-25 08:54:01 UTC 
Has verified, the problem has been resolved, so please update its status..

Verified Environment:
  kernel version:3.10.0-475.el7.x86_64
  qemu-kvm-rhev version:qemu-kvm-rhev-2.6.0-11.el7.x86_64
  seabios version:seabios-1.9.1-4.el7.x86_64

Verified CMDs:
/usr/libexec/qemu-kvm \
-name rhel7.1-4 \
-machine pc \
-cpu host \
-m 4096 \
-smp 1,sockets=1 \
-uuid 1534fa42-4818-4493-9f67-eee5ba758385 \
-no-user-config -nodefaults \
-chardev socket,id=qmp_id_catch_monitor,path=/var/tmp/test1,server,nowait \
-mon chardev=qmp_id_catch_monitor,id=monitor,mode=control \
-boot menu=on,splash-time=12000 \
-device virtio-scsi-pci,id=scsi0,bus=pci.0,addr=0x5 \
-drive file=/home/se_test.qcow2,if=none,id=drive-ide0-0-0,format=qcow2,aio=threads \
-device scsi-hd,bus=scsi0.0,drive=drive-ide0-0-0,id=scsi0-0-1,bootindex=1 \
-enable-kvm \
-vga qxl \
-vnc 0:2 \
-monitor stdio \
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