[qemu bug] device assignment doesn't work: "error: requires KVM support"

[qemu bug] device assignment doesn't work: "error: requires KVM support"

[Ren, Yongjie]

[-- Attachment #1: Type: text/plain, Size: 1000 bytes --]

Hi,
When doing device assignment with qemu and kvm upstream, I met "error: requires KVM support".  
Please also refer to the bug in qemu bugzilla. 
https://bugs.launchpad.net/qemu/+bug/882358

qemu.git commit:8843cf40c0f482949e6ae9d0119e45d6b96fe890

I met the following error when doing device assignment with qemu in kvm host.
./x86_64-softmmu/qemu-system-x86_64 -smp 2 -m 1024 -device pci-assign,host=0e:00.0 -hda /root/rhel6u1.img
qemu-system-x86_64: -device pci-assign,host=0e:00.0: pci-assign: error: requires KVM support
qemu-system-x86_64: -device pci-assign,host=0e:00.0: Device 'pci-assign' could not be initialized

./x86_64-softmmu/qemu-system-x86_64 -device ? 2>&1 | grep -i pci-assign
name "pci-assign", bus PCI, desc "pass through host pci devices to the guest"

When configuring the qemu, it prints "KVM support yes". My qemu configuration log and compiling log are attached.

But commit edbb7c0d doesn't have this issue.

Best Regards,
     Yongjie Ren  (Jay)


[-- Attachment #2: configure.log --]
[-- Type: application/octet-stream, Size: 2328 bytes --]

Install prefix    /usr/local
BIOS directory    /usr/local/share/qemu
binary directory  /usr/local/bin
library directory /usr/local/lib
include directory /usr/local/include
config directory  /usr/local/etc
Manual directory  /usr/local/share/man
ELF interp prefix /usr/gnemul/qemu-%M
Source path       /root/qemu-kvm
C compiler        gcc
Host C compiler   gcc
CFLAGS            -O2 -g 
QEMU_CFLAGS       -Werror -m64 -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Wstrict-prototypes -Wredundant-decls -Wall -Wundef -Wwrite-strings -Wmissing-prototypes -fno-strict-aliasing  -fstack-protector-all -Wendif-labels -Wmissing-include-dirs -Wempty-body -Wnested-externs -Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers -Wold-style-declaration -Wold-style-definition -Wtype-limits -I/usr/include/libpng12   -I$(SRC_PATH)/libcacard -I/usr/include/nss3 -I/usr/include/nspr4  
LDFLAGS           -Wl,--warn-common -m64 -g 
make              make
install           install
python            python
smbd              /usr/sbin/smbd
host CPU          x86_64
host big endian   no
target list       x86_64-softmmu
tcg debug enabled no
Mon debug enabled no
gprof enabled     no
sparse enabled    no
strip binaries    yes
profiler          no
static build      no
-Werror enabled   yes
SDL support       no
curses support    yes
curl support      yes
check support     no
mingw32 support   no
Audio drivers     oss
Extra audio cards ac97 es1370 sb16 hda
Block whitelist   
Mixer emulation   no
VNC support       yes
VNC TLS support   yes
VNC SASL support  yes
VNC JPEG support  no
VNC PNG support   yes
VNC thread        no
xen support       no
CPU emulation     yes
brlapi support    no
bluez  support    no
Documentation     no
NPTL support      yes
GUEST_BASE        yes
PIE user targets  no
vde support       no
Linux AIO support no
ATTR/XATTR support yes
Install blobs     yes
KVM support       yes
KVM PIT support   yes
KVM device assig. yes
fdt support       no
preadv support    yes
fdatasync         yes
madvise           yes
posix_madvise     yes
uuid support      no
vhost-net support yes
Trace backend     nop
Trace output file trace-<pid>
spice support     no
rbd support       no
xfsctl support    no
nss used          yes
usb net redir     no
OpenGL support    no
build guest agent yes

[-- Attachment #3: make.log --]
[-- Type: application/octet-stream, Size: 9474 bytes --]

  GEN   config-host.h
  GEN   trace.h
  GEN   qemu-options.def
  GEN   qapi-generated/qga-qapi-visit.h
  GEN   trace.c
  GEN   qemu-img-cmds.h
  AS    optionrom/multiboot.o
  AS    optionrom/linuxboot.o
  AS    optionrom/vapic.o
  Building optionrom/multiboot.img
  Building optionrom/linuxboot.img
  Building optionrom/vapic.img
  Building optionrom/multiboot.raw
  Building optionrom/linuxboot.raw
  Building optionrom/vapic.raw
  Signing optionrom/multiboot.bin
  Signing optionrom/linuxboot.bin
  Signing optionrom/vapic.bin
  GEN   qapi-generated/qga-qapi-types.h
  GEN   qapi-generated/qga-qmp-marshal.c
  CC    qapi/qapi-visit-core.o
  CC    qapi/qmp-input-visitor.o
  CC    qapi/qmp-output-visitor.o
  CC    qapi/qapi-dealloc-visitor.o
  CC    qapi/qmp-registry.o
  CC    trace.o
  CC    qapi/qmp-dispatch.o
  CC    trace/default.o
  CC    trace/control.o
  CC    qint.o
  CC    qstring.o
  CC    qdict.o
  CC    qlist.o
  CC    qfloat.o
  CC    qbool.o
  CC    json-lexer.o
  CC    qjson.o
  CC    json-streamer.o
  CC    json-parser.o
  CC    qerror.o
  CC    error.o
  CC    qapi-generated/qga-qapi-visit.o
  CC    qapi-generated/qga-qmp-marshal.o
  CC    qemu-nbd.o
  CC    qemu-thread-posix.o
  CC    cache-utils.o
  CC    async.o
  CC    nbd.o
  CC    block.o
  CC    aio.o
  CC    aes.o
  CC    qemu-config.o
  CC    qemu-progress.o
  CC    qemu-coroutine.o
  CC    qemu-coroutine-lock.o
  CC    coroutine-ucontext.o
  CC    posix-aio-compat.o
  CC    block/cow.o
  CC    block/raw.o
  CC    block/qcow.o
  CC    block/vdi.o
  CC    block/vmdk.o
  CC    block/cloop.o
  CC    block/dmg.o
  CC    block/bochs.o
  CC    block/vpc.o
  CC    block/vvfat.o
  CC    block/qcow2.o
  CC    block/qcow2-refcount.o
  CC    block/qcow2-cluster.o
  CC    block/qcow2-snapshot.o
  CC    block/qcow2-cache.o
  CC    block/qed.o
  CC    block/qed-gencb.o
  CC    block/qed-l2-cache.o
  CC    block/qed-table.o
  CC    block/qed-cluster.o
  CC    block/qed-check.o
  CC    block/parallels.o
  CC    block/nbd.o
  CC    block/blkdebug.o
  CC    block/sheepdog.o
  CC    block/blkverify.o
  CC    block/raw-posix.o
  CC    block/curl.o
  CC    qemu-timer-common.o
  CC    qemu-img.o
  CC    qemu-io.o
  CC    cmd.o
  CC    libhw64/vl.o
  CC    blockdev.o
  CC    net.o
  CC    libhw64/loader.o
  CC    libhw64/virtio-console.o
  CC    libhw64/usb-libhw.o
  CC    libhw64/virtio-pci.o
  CC    libhw64/fw_cfg.o
  CC    libhw64/pci_bridge.o
  CC    libhw64/msix.o
  CC    net/queue.o
  CC    libhw64/msi.o
  CC    net/checksum.o
  CC    libhw64/pci_host.o
  CC    libhw64/pcie_host.o
  CC    libhw64/ioh3420.o
  CC    libhw64/xio3130_upstream.o
  CC    libhw64/xio3130_downstream.o
  CC    net/util.o
  CC    net/socket.o
  CC    net/dump.o
  CC    libhw64/watchdog.o
  CC    libhw64/serial.o
  CC    libhw64/parallel.o
  CC    net/tap.o
  CC    libhw64/pckbd.o
  CC    libhw64/usb-uhci.o
  CC    net/tap-linux.o
  CC    libhw64/usb-ohci.o
  CC    net/slirp.o
  CC    fsdev/qemu-fsdev.o
  CC    readline.o
  CC    libhw64/usb-ehci.o
  CC    libhw64/fdc.o
  CC    console.o
  CC    cursor.o
  CC    os-posix.o
  CC    tcg-runtime.o
  CC    host-utils.o
  CC    libhw64/pm_smbus.o
  CC    irq.o
  CC    libhw64/apm.o
  CC    input.o
  CC    i2c.o
  CC    smbus.o
  CC    libhw64/dma.o
  CC    smbus_eeprom.o
  CC    libhw64/hpet.o
  CC    libhw64/applesmc.o
  CC    eeprom93xx.o
  CC    libhw64/usb-ccid.o
  CC    libhw64/ccid-card-passthru.o
  CC    libhw64/ccid-card-emulated.o
  CC    libhw64/i8259.o
  CC    scsi-disk.o
  CC    libhw64/wdt_i6300esb.o
  CC    libhw64/pcie.o
  CC    libhw64/pcie_aer.o
  CC    cdrom.o
  CC    libhw64/pcie_port.o
  CC    scsi-generic.o
  CC    scsi-bus.o
  CC    libhw64/ne2000.o
  CC    hid.o
  CC    usb.o
  CC    libhw64/eepro100.o
  CC    usb-hub.o
  CC    usb-linux.o
  CC    usb-hid.o
  CC    usb-msd.o
  CC    usb-wacom.o
  CC    libhw64/pcnet-pci.o
  CC    libhw64/pcnet.o
  CC    usb-serial.o
  CC    libhw64/e1000.o
  CC    libhw64/rtl8139.o
  CC    usb-net.o
  CC    usb-bus.o
  CC    libhw64/ne2000-isa.o
  CC    usb-desc.o
  CC    libhw64/ide/core.o
  CC    bt.o
  CC    libhw64/ide/atapi.o
  CC    libhw64/ide/qdev.o
  CC    bt-host.o
  CC    bt-vhci.o
  CC    bt-l2cap.o
  CC    libhw64/ide/pci.o
  CC    bt-sdp.o
  CC    bt-hci.o
  CC    bt-hid.o
  CC    usb-bt.o
  CC    libhw64/ide/isa.o
  CC    libhw64/ide/piix.o
  CC    libhw64/ide/ahci.o
  CC    bt-hci-csr.o
  CC    libhw64/ide/ich.o
  CC    libhw64/lsi53c895a.o
  CC    libhw64/dma-helpers.o
  CC    libhw64/sysbus.o
  CC    libhw64/isa-bus.o
  CC    libhw64/qdev-addr.o
  CC    buffered_file.o
  CC    migration.o
  CC    libhw64/vga-pci.o
  CC    libhw64/vga-isa.o
  CC    migration-tcp.o
  CC    libhw64/vmware_vga.o
  CC    libhw64/vmmouse.o
  CC    qemu-char.o
  CC    savevm.o
  CC    msmouse.o
  CC    ps2.o
  CC    qdev.o
  CC    qdev-properties.o
  CC    libhw64/sb16.o
  CC    libhw64/es1370.o
  CC    block-migration.o
  CC    libhw64/ac97.o
  CC    libhw64/intel-hda.o
  CC    libhw64/hda-audio.o
  CC    iohandler.o
  CC    pflib.o
  CC    bitmap.o
  CC    bitops.o
  CC    migration-exec.o
  CC    migration-unix.o
  CC    migration-fd.o
  CC    audio/audio.o
  CC    libhw64/9pfs/virtio-9p.o
  CC    audio/noaudio.o
  CC    libhw64/9pfs/virtio-9p-debug.o
  CC    audio/wavaudio.o
  CC    libhw64/9pfs/virtio-9p-local.o
  CC    libhw64/9pfs/virtio-9p-xattr.o
  CC    audio/mixeng.o
  CC    libhw64/9pfs/virtio-9p-xattr-user.o
  CC    libhw64/9pfs/virtio-9p-posix-acl.o
  CC    libhw64/9pfs/virtio-9p-coth.o
  CC    libhw64/9pfs/cofs.o
  CC    libhw64/9pfs/codir.o
  CC    audio/ossaudio.o
  CC    audio/wavcapture.o
  CC    ui/keymaps.o
  CC    ui/curses.o
  CC    ui/vnc.o
  CC    ui/d3des.o
  CC    libhw64/9pfs/cofile.o
  CC    ui/vnc-enc-zlib.o
  CC    ui/vnc-enc-hextile.o
  CC    ui/vnc-enc-tight.o
  CC    ui/vnc-palette.o
  CC    ui/vnc-enc-zrle.o
  CC    libhw64/9pfs/coxattr.o
  CC    libhw64/9pfs/virtio-9p-handle.o
  CC    ui/vnc-tls.o
  CC    ui/vnc-auth-vencrypt.o
  CC    ui/vnc-auth-sasl.o
  CC    ui/vnc-jobs-sync.o
  CC    iov.o
  CC    acl.o
  CC    compatfd.o
  CC    notify.o
  CC    event_notifier.o
  CC    qemu-timer.o
  CC    slirp/cksum.o
  CC    slirp/ip_icmp.o
  CC    slirp/if.o
  CC    slirp/ip_input.o
  CC    slirp/ip_output.o
  CC    slirp/slirp.o
  CC    slirp/mbuf.o
  CC    slirp/misc.o
  CC    slirp/sbuf.o
  CC    slirp/socket.o
  CC    slirp/tcp_input.o
  CC    slirp/tcp_output.o
  CC    slirp/tcp_subr.o
  CC    slirp/udp.o
  CC    slirp/bootp.o
  CC    slirp/tftp.o
  CC    slirp/arp_table.o
  CC    qmp-marshal.o
  CC    qapi-visit.o
  CC    qapi-types.o
  CC    qmp.o
  CC    hmp.o
  CC    libdis/i386-dis.o
  CC    qemu-ga.o
  CC    qga/guest-agent-commands.o
  CC    qga/guest-agent-command-state.o
  CC    qemu-tool.o
  CC    qemu-error.o
  CC    qemu-sockets.o
  CC    module.o
  CC    qemu-option.o
  CC    cutils.o
  CC    osdep.o
  CC    oslib-posix.o
  CC    qapi-generated/qga-qapi-types.o
  CC    libcacard/cac.o
  CC    libcacard/vcard.o
  CC    libcacard/event.o
  CC    libcacard/vreader.o
  CC    libcacard/vcard_emul_nss.o
  CC    libcacard/card_7816.o
  CC    libcacard/vcard_emul_type.o
  CC    libcacard/vscclient.o
  LINK  qemu-ga
  LINK  qemu-nbd
  LINK  qemu-img
  LINK  qemu-io
  LINK  vscclient
  GEN   config-target.h
  GEN   x86_64-softmmu/hmp-commands.h
  GEN   x86_64-softmmu/qmp-commands-old.h
  CC    x86_64-softmmu/arch_init.o
  CC    x86_64-softmmu/machine.o
  CC    x86_64-softmmu/cpus.o
  CC    x86_64-softmmu/gdbstub.o
  CC    x86_64-softmmu/balloon.o
  CC    x86_64-softmmu/ioport.o
  CC    x86_64-softmmu/pci.o
  CC    x86_64-softmmu/virtio.o
  CC    x86_64-softmmu/virtio-blk.o
  CC    x86_64-softmmu/virtio-balloon.o
  CC    x86_64-softmmu/virtio-serial-bus.o
  CC    x86_64-softmmu/virtio-net.o
  CC    x86_64-softmmu/vhost_net.o
  CC    x86_64-softmmu/vhost.o
  CC    x86_64-softmmu/9pfs/virtio-9p-device.o
  CC    x86_64-softmmu/kvm.o
  CC    x86_64-softmmu/kvm-all.o
  CC    x86_64-softmmu/memory.o
  CC    x86_64-softmmu/xen-stub.o
  CC    x86_64-softmmu/ivshmem.o
  CC    x86_64-softmmu/exec.o
  CC    x86_64-softmmu/cpu-exec.o
  CC    x86_64-softmmu/translate-all.o
  CC    x86_64-softmmu/translate.o
  CC    x86_64-softmmu/tcg/tcg.o
  CC    x86_64-softmmu/tcg/optimize.o
  CC    x86_64-softmmu/fpu/softfloat.o
  CC    x86_64-softmmu/op_helper.o
  CC    x86_64-softmmu/helper.o
  CC    x86_64-softmmu/cpuid.o
  CC    x86_64-softmmu/kvm-tpr-opt.o
  CC    x86_64-softmmu/disas.o
  CC    x86_64-softmmu/vga.o
  CC    x86_64-softmmu/mc146818rtc.o
  CC    x86_64-softmmu/pc.o
  CC    x86_64-softmmu/cirrus_vga.o
  CC    x86_64-softmmu/sga.o
  CC    x86_64-softmmu/apic.o
  CC    x86_64-softmmu/ioapic.o
  CC    x86_64-softmmu/piix_pci.o
  CC    x86_64-softmmu/vmport.o
  CC    x86_64-softmmu/device-hotplug.o
  CC    x86_64-softmmu/pci-hotplug.o
  CC    x86_64-softmmu/smbios.o
  CC    x86_64-softmmu/wdt_ib700.o
  CC    x86_64-softmmu/debugcon.o
rm vapic.o multiboot.o linuxboot.raw linuxboot.img vapic.raw vapic.img multiboot.raw multiboot.img linuxboot.o
  CC    x86_64-softmmu/multiboot.o
  CC    x86_64-softmmu/pc_piix.o
  CC    x86_64-softmmu/kvmclock.o
  CC    x86_64-softmmu/testdev.o
  CC    x86_64-softmmu/acpi.o
  CC    x86_64-softmmu/acpi_piix4.o
  CC    x86_64-softmmu/pcspk.o
  CC    x86_64-softmmu/i8254.o
  CC    x86_64-softmmu/i8254-kvm.o
  CC    x86_64-softmmu/device-assignment.o
  CC    x86_64-softmmu/monitor.o
  LINK  x86_64-softmmu/qemu-system-x86_64

Re: [qemu bug] device assignment doesn't work: "error: requires KVM support"

[Alex Williamson]

On Thu, 2011-10-27 at 10:56 +0800, Ren, Yongjie wrote:
> Hi,
> When doing device assignment with qemu and kvm upstream, I met "error: requires KVM support".  
> Please also refer to the bug in qemu bugzilla. 
> https://bugs.launchpad.net/qemu/+bug/882358
> 
> qemu.git commit:8843cf40c0f482949e6ae9d0119e45d6b96fe890
> 
> I met the following error when doing device assignment with qemu in kvm host.
> ./x86_64-softmmu/qemu-system-x86_64 -smp 2 -m 1024 -device pci-assign,host=0e:00.0 -hda /root/rhel6u1.img
> qemu-system-x86_64: -device pci-assign,host=0e:00.0: pci-assign: error: requires KVM support
> qemu-system-x86_64: -device pci-assign,host=0e:00.0: Device 'pci-assign' could not be initialized
> 
> ./x86_64-softmmu/qemu-system-x86_64 -device ? 2>&1 | grep -i pci-assign
> name "pci-assign", bus PCI, desc "pass through host pci devices to the guest"
> 
> When configuring the qemu, it prints "KVM support yes". My qemu configuration log and compiling log are attached.
> 
> But commit edbb7c0d doesn't have this issue.

Note these are qemu-kvm.git commit IDs.

The error message is correct, device assignment requires kvm support.
What does 'info kvm' in the monitor report?

Alex

RE: [qemu bug] device assignment doesn't work: "error: requires KVM support"

[Ren, Yongjie]

> -----Original Message-----
> From: Alex Williamson [mailto:alex.williamson@redhat.com]
> Sent: Thursday, October 27, 2011 11:04 AM
> To: Ren, Yongjie
> Cc: KVM General; Avi Kivity
> Subject: Re: [qemu bug] device assignment doesn't work: "error: requires KVM
> support"
> 
> On Thu, 2011-10-27 at 10:56 +0800, Ren, Yongjie wrote:
> > Hi,
> > When doing device assignment with qemu and kvm upstream, I met "error:
> requires KVM support".
> > Please also refer to the bug in qemu bugzilla.
> > https://bugs.launchpad.net/qemu/+bug/882358
> >
> > qemu.git commit:8843cf40c0f482949e6ae9d0119e45d6b96fe890
> >
> > I met the following error when doing device assignment with qemu in kvm
> host.
> > ./x86_64-softmmu/qemu-system-x86_64 -smp 2 -m 1024 -device
> pci-assign,host=0e:00.0 -hda /root/rhel6u1.img
> > qemu-system-x86_64: -device pci-assign,host=0e:00.0: pci-assign: error:
> requires KVM support
> > qemu-system-x86_64: -device pci-assign,host=0e:00.0: Device 'pci-assign' could
> not be initialized
> >
> > ./x86_64-softmmu/qemu-system-x86_64 -device ? 2>&1 | grep -i pci-assign
> > name "pci-assign", bus PCI, desc "pass through host pci devices to the guest"
> >
> > When configuring the qemu, it prints "KVM support yes". My qemu
> configuration log and compiling log are attached.
> >
> > But commit edbb7c0d doesn't have this issue.

It's edbb7c0de56692868e6126c7ff7e8bf917f8d0e7. "edbb7c0d" is unique in git log, so it may stand for its full commit ID.

> Note these are qemu-kvm.git commit IDs.

They are commit IDs in master branch of git://github.com/avikivity/qemu.git

> 
> The error message is correct, device assignment requires kvm support.
> What does 'info kvm' in the monitor report?
It shows "kvm support: disabled".
But when configuring qemu, I get this message " KVM support yes". See details in my attachment configure.log

yongjie

Re: [qemu bug] device assignment doesn't work: "error: requires KVM support"

[Markus Armbruster]

"Ren, Yongjie" <yongjie.ren@intel.com> writes:

>> -----Original Message-----
>> From: Alex Williamson [mailto:alex.williamson@redhat.com]
>> Sent: Thursday, October 27, 2011 11:04 AM
>> To: Ren, Yongjie
>> Cc: KVM General; Avi Kivity
>> Subject: Re: [qemu bug] device assignment doesn't work: "error: requires KVM
>> support"
[...]
>> The error message is correct, device assignment requires kvm support.
>> What does 'info kvm' in the monitor report?
> It shows "kvm support: disabled".
> But when configuring qemu, I get this message " KVM support yes". See details in my attachment configure.log

Try running with --enable-kvm.

Check /dev/kvm permissions.

RE: [qemu bug] device assignment doesn't work: "error: requires KVM support"

[Ren, Yongjie]

> -----Original Message-----
> From: Markus Armbruster [mailto:armbru@redhat.com]
> Sent: Thursday, October 27, 2011 2:50 PM
> To: Ren, Yongjie
> Cc: Alex Williamson; KVM General; Avi Kivity
> Subject: Re: [qemu bug] device assignment doesn't work: "error: requires KVM
> support"
> 
> "Ren, Yongjie" <yongjie.ren@intel.com> writes:
> 
> >> -----Original Message-----
> >> From: Alex Williamson [mailto:alex.williamson@redhat.com]
> >> Sent: Thursday, October 27, 2011 11:04 AM
> >> To: Ren, Yongjie
> >> Cc: KVM General; Avi Kivity
> >> Subject: Re: [qemu bug] device assignment doesn't work: "error: requires
> KVM
> >> support"
> [...]
> >> The error message is correct, device assignment requires kvm support.
> >> What does 'info kvm' in the monitor report?
> > It shows "kvm support: disabled".
> > But when configuring qemu, I get this message " KVM support yes". See details
> in my attachment configure.log
> 
> Try running with --enable-kvm.

I added '--enable-kvm' when configuring qemu. I got the same configure output. And I compiled and ran qemu, then I met the same issue as I describled before.

> Check /dev/kvm permissions.
I have the permission for /dev/kvm. I use 'root' account.
ls -l /dev/kvm
crw-rw---- 1 root root 10, 232 Oct 26 22:48 /dev/kvm

yongjie

RE: [qemu bug] device assignment doesn't work: "error: requires KVM support"

[Ren, Yongjie]

> -----Original Message-----
> From: kvm-owner@vger.kernel.org [mailto:kvm-owner@vger.kernel.org] On
> Behalf Of Ren, Yongjie
> Sent: Thursday, October 27, 2011 3:03 PM
> To: Markus Armbruster
> Cc: Alex Williamson; KVM General; Avi Kivity
> Subject: RE: [qemu bug] device assignment doesn't work: "error: requires KVM
> support"
> 
> > -----Original Message-----
> > From: Markus Armbruster [mailto:armbru@redhat.com]
> > Sent: Thursday, October 27, 2011 2:50 PM
> > To: Ren, Yongjie
> > Cc: Alex Williamson; KVM General; Avi Kivity
> > Subject: Re: [qemu bug] device assignment doesn't work: "error: requires KVM
> > support"
> >
> > "Ren, Yongjie" <yongjie.ren@intel.com> writes:
> >
> > >> -----Original Message-----
> > >> From: Alex Williamson [mailto:alex.williamson@redhat.com]
> > >> Sent: Thursday, October 27, 2011 11:04 AM
> > >> To: Ren, Yongjie
> > >> Cc: KVM General; Avi Kivity
> > >> Subject: Re: [qemu bug] device assignment doesn't work: "error: requires
> > KVM
> > >> support"
> > [...]
> > >> The error message is correct, device assignment requires kvm support.
> > >> What does 'info kvm' in the monitor report?
> > > It shows "kvm support: disabled".
> > > But when configuring qemu, I get this message " KVM support yes". See
> details
> > in my attachment configure.log
> >
> > Try running with --enable-kvm.
> 
> I added '--enable-kvm' when configuring qemu. I got the same configure output.
> And I compiled and ran qemu, then I met the same issue as I describled before.
Oh, adding '--enable-kvm' when running qemu will work. The following command line enables kvm when qemu starting.
./x86_64-softmmu/qemu-system-x86_64 -smp 2 -m 1024 -device pci-assign,host=0e:00.0 -hda /root/rhel6u1.img --enable-kvm
But it didn't need to add '--enable-kvm' two weeks ago. Must we add this parameter from now on if we want to use kvm ?

> > Check /dev/kvm permissions.
> I have the permission for /dev/kvm. I use 'root' account.
> ls -l /dev/kvm
> crw-rw---- 1 root root 10, 232 Oct 26 22:48 /dev/kvm
> 
> yongjie
> --
> To unsubscribe from this list: send the line "unsubscribe kvm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [qemu bug] device assignment doesn't work: "error: requires KVM support"

[Markus Armbruster]

"Ren, Yongjie" <yongjie.ren@intel.com> writes:

>> -----Original Message-----
>> From: Markus Armbruster [mailto:armbru@redhat.com]
>> Sent: Thursday, October 27, 2011 2:50 PM
>> To: Ren, Yongjie
>> Cc: Alex Williamson; KVM General; Avi Kivity
>> Subject: Re: [qemu bug] device assignment doesn't work: "error: requires KVM
>> support"
>> 
>> "Ren, Yongjie" <yongjie.ren@intel.com> writes:
>> 
>> >> -----Original Message-----
>> >> From: Alex Williamson [mailto:alex.williamson@redhat.com]
>> >> Sent: Thursday, October 27, 2011 11:04 AM
>> >> To: Ren, Yongjie
>> >> Cc: KVM General; Avi Kivity
>> >> Subject: Re: [qemu bug] device assignment doesn't work: "error: requires
>> KVM
>> >> support"
>> [...]
>> >> The error message is correct, device assignment requires kvm support.
>> >> What does 'info kvm' in the monitor report?
>> > It shows "kvm support: disabled".
>> > But when configuring qemu, I get this message " KVM support yes". See details
>> in my attachment configure.log
>> 
>> Try running with --enable-kvm.
>
> I added '--enable-kvm' when configuring qemu. I got the same configure output. And I compiled and ran qemu, then I met the same issue as I describled before.

Sorry, I meant run qemu --enable-kvm.

>> Check /dev/kvm permissions.
> I have the permission for /dev/kvm. I use 'root' account.
> ls -l /dev/kvm
> crw-rw---- 1 root root 10, 232 Oct 26 22:48 /dev/kvm
>
> yongjie

Re: [qemu bug] device assignment doesn't work: "error: requires KVM support"

[Markus Armbruster]

"Ren, Yongjie" <yongjie.ren@intel.com> writes:

>> -----Original Message-----
>> From: kvm-owner@vger.kernel.org [mailto:kvm-owner@vger.kernel.org] On
>> Behalf Of Ren, Yongjie
>> Sent: Thursday, October 27, 2011 3:03 PM
>> To: Markus Armbruster
>> Cc: Alex Williamson; KVM General; Avi Kivity
>> Subject: RE: [qemu bug] device assignment doesn't work: "error: requires KVM
>> support"
>> 
>> > -----Original Message-----
>> > From: Markus Armbruster [mailto:armbru@redhat.com]
>> > Sent: Thursday, October 27, 2011 2:50 PM
>> > To: Ren, Yongjie
>> > Cc: Alex Williamson; KVM General; Avi Kivity
>> > Subject: Re: [qemu bug] device assignment doesn't work: "error: requires KVM
>> > support"
>> >
>> > "Ren, Yongjie" <yongjie.ren@intel.com> writes:
>> >
>> > >> -----Original Message-----
>> > >> From: Alex Williamson [mailto:alex.williamson@redhat.com]
>> > >> Sent: Thursday, October 27, 2011 11:04 AM
>> > >> To: Ren, Yongjie
>> > >> Cc: KVM General; Avi Kivity
>> > >> Subject: Re: [qemu bug] device assignment doesn't work: "error: requires
>> > KVM
>> > >> support"
>> > [...]
>> > >> The error message is correct, device assignment requires kvm support.
>> > >> What does 'info kvm' in the monitor report?
>> > > It shows "kvm support: disabled".
>> > > But when configuring qemu, I get this message " KVM support yes". See
>> details
>> > in my attachment configure.log
>> >
>> > Try running with --enable-kvm.
>> 
>> I added '--enable-kvm' when configuring qemu. I got the same configure output.
>> And I compiled and ran qemu, then I met the same issue as I describled before.
> Oh, adding '--enable-kvm' when running qemu will work. The following command line enables kvm when qemu starting.
> ./x86_64-softmmu/qemu-system-x86_64 -smp 2 -m 1024 -device pci-assign,host=0e:00.0 -hda /root/rhel6u1.img --enable-kvm
> But it didn't need to add '--enable-kvm' two weeks ago. Must we add this parameter from now on if we want to use kvm ?

Use of KVM should still be the default.  If it isn't anymore, can you
use bisect to finger the commit that broke it?

[...]

Re: [qemu bug] device assignment doesn't work: "error: requires KVM support"

[Jan Kiszka]

[-- Attachment #1: Type: text/plain, Size: 2416 bytes --]

On 2011-10-27 09:20, Markus Armbruster wrote:
> "Ren, Yongjie" <yongjie.ren@intel.com> writes:
> 
>>> -----Original Message-----
>>> From: kvm-owner@vger.kernel.org [mailto:kvm-owner@vger.kernel.org] On
>>> Behalf Of Ren, Yongjie
>>> Sent: Thursday, October 27, 2011 3:03 PM
>>> To: Markus Armbruster
>>> Cc: Alex Williamson; KVM General; Avi Kivity
>>> Subject: RE: [qemu bug] device assignment doesn't work: "error: requires KVM
>>> support"
>>>
>>>> -----Original Message-----
>>>> From: Markus Armbruster [mailto:armbru@redhat.com]
>>>> Sent: Thursday, October 27, 2011 2:50 PM
>>>> To: Ren, Yongjie
>>>> Cc: Alex Williamson; KVM General; Avi Kivity
>>>> Subject: Re: [qemu bug] device assignment doesn't work: "error: requires KVM
>>>> support"
>>>>
>>>> "Ren, Yongjie" <yongjie.ren@intel.com> writes:
>>>>
>>>>>> -----Original Message-----
>>>>>> From: Alex Williamson [mailto:alex.williamson@redhat.com]
>>>>>> Sent: Thursday, October 27, 2011 11:04 AM
>>>>>> To: Ren, Yongjie
>>>>>> Cc: KVM General; Avi Kivity
>>>>>> Subject: Re: [qemu bug] device assignment doesn't work: "error: requires
>>>> KVM
>>>>>> support"
>>>> [...]
>>>>>> The error message is correct, device assignment requires kvm support.
>>>>>> What does 'info kvm' in the monitor report?
>>>>> It shows "kvm support: disabled".
>>>>> But when configuring qemu, I get this message " KVM support yes". See
>>> details
>>>> in my attachment configure.log
>>>>
>>>> Try running with --enable-kvm.
>>>
>>> I added '--enable-kvm' when configuring qemu. I got the same configure output.
>>> And I compiled and ran qemu, then I met the same issue as I describled before.
>> Oh, adding '--enable-kvm' when running qemu will work. The following command line enables kvm when qemu starting.
>> ./x86_64-softmmu/qemu-system-x86_64 -smp 2 -m 1024 -device pci-assign,host=0e:00.0 -hda /root/rhel6u1.img --enable-kvm
>> But it didn't need to add '--enable-kvm' two weeks ago. Must we add this parameter from now on if we want to use kvm ?
> 
> Use of KVM should still be the default.  If it isn't anymore, can you
> use bisect to finger the commit that broke it?

Might be "qemu-kvm: set default accelerator via target.conf". Unless you
fully install qemu, that conf is not picked up (or an older version is
used). I'd still like to see this working with qemu started from a build
directory...

Jan


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Re: [qemu bug] device assignment doesn't work: "error: requires KVM support"

[Marcelo Tosatti]

On Thu, Oct 27, 2011 at 09:38:02AM +0200, Jan Kiszka wrote:
> >> But it didn't need to add '--enable-kvm' two weeks ago. Must we add this parameter from now on if we want to use kvm ?
> > 
> > Use of KVM should still be the default.  If it isn't anymore, can you
> > use bisect to finger the commit that broke it?
> 
> Might be "qemu-kvm: set default accelerator via target.conf". Unless you
> fully install qemu, that conf is not picked up (or an older version is
> used). I'd still like to see this working with qemu started from a build
> directory...
> 
> Jan

Actually it was lack of 0eb2a7e9010f2 since he was using 8843cf40.

But you're right, reverted a5c40eb1aa9 for now, thanks.