Re: Property '.hmat' not found

[Eduardo Habkost]

On Tue, Nov 17, 2020 at 11:49:38AM +0800, 郭俊甫 (Jack Kuo) wrote:
> >
> > Do you have the output of `qemu-system-x86_64 -version`, and more
> > information on how your binary was built?
> 
> 
> I have 2 machines, both of them encounter the .hmat problem.
> 
> (1) *5.1.90 (v5.2.0-rc0*)
>     - follow this wiki [1], and configure cmd: `./configure
> --target-list=x86_64-softmmu`
>     - i5-8400, Ubuntu 20.04.1 LTS, kernel: 5.4.0-53-generic

This one is supposed to work, and I see the pc-i440fx-5.2.hmat
property below.


> 
> (2) *4.2.1 (Debian 1:4.2-3ubuntu6.8)*

This one isn't expect to have "hmat", as the feature was
introduced in v5.0.0.

>     - use apt install qemu
>     - E5-2670 * 2, Ubuntu 20.04.1 LTS, kernel: 5.4.0-53-generic, Dell
> PowerEdge-R720
> 
> I can't reproduce it here.  I've tested both qemu.git master
> 
> 
> That’s strange, also I try the command you (Eduardo) provided, '.hmat' not
> found, too.
> Does the kernel module matter? or PC architecture?

Kernel or host architecture shouldn't matter.  The choice of
machine type matters, but the default is supposed to be "pc".
The output of "-machine help" might be useful to debug it.

Could you check what happens if you use
"-machine pc-i440fx-5.2,hmat=on" instead of "-machine hmat=on"?


> 
> Output of `-machine help` and `-machine pc,help` would be useful
> > to debug it, too.
> 
> 
>  (1) *5.1.90 (i5-8400)*
> *```*
> $ qemu-system-x86_64 -machine pc,help
> pc-i440fx-5.2.nvdimm-persistence=string (Set NVDIMM persistenceValid values
> are cpu, mem-ctrl)
> pc-i440fx-5.2.hmat=bool (Set on/off to enable/disable ACPI Heterogeneous
> Memory Attribute Table (HMAT))
> pc-i440fx-5.2.nvdimm=bool (Set on/off to enable/disable NVDIMM
> instantiation)
> pc-i440fx-5.2.pcspk-audiodev=str (ID of an audiodev to use as a backend)
> pc-i440fx-5.2.pflash1=str (Node name or ID of a block device to use as a
> backend)
> pc-i440fx-5.2.pflash0=str (Node name or ID of a block device to use as a
> backend)
> pc-i440fx-5.2.hpet=bool
> pc-i440fx-5.2.vmport=OnOffAuto (Enable vmport (pc & q35))
> pc-i440fx-5.2.sata=bool
> pc-i440fx-5.2.pit=bool
> pc-i440fx-5.2.max-ram-below-4g=size (Maximum ram below the 4G boundary
> (32bit boundary))
> pc-i440fx-5.2.smbus=bool
> pc-i440fx-5.2.acpi=OnOffAuto (Enable ACPI)
> pc-i440fx-5.2.smm=OnOffAuto (Enable SMM)
> pc-i440fx-5.2.memory-backend=string (Set RAM backendValid value is ID of
> hostmem based backend)
> pc-i440fx-5.2.firmware=string (Firmware image)
> pc-i440fx-5.2.initrd=string (Linux initial ramdisk file)
> pc-i440fx-5.2.dumpdtb=string (Dump current dtb to a file and quit)
> pc-i440fx-5.2.kernel=string (Linux kernel image file)
> pc-i440fx-5.2.dt-compatible=string (Overrides the "compatible" property of
> the dt root node)
> pc-i440fx-5.2.mem-merge=bool (Enable/disable memory merge support)
> pc-i440fx-5.2.suppress-vmdesc=bool (Set on to disable self-describing
> migration)
> pc-i440fx-5.2.append=string (Linux kernel command line)
> pc-i440fx-5.2.dump-guest-core=bool (Include guest memory in a core dump)
> pc-i440fx-5.2.phandle-start=int (The first phandle ID we may generate
> dynamically)
> pc-i440fx-5.2.usb=bool (Set on/off to enable/disable usb)
> pc-i440fx-5.2.dtb=string (Linux kernel device tree file)
> pc-i440fx-5.2.memory-encryption=string (Set memory encryption object to use)
> pc-i440fx-5.2.graphics=bool (Set on/off to enable/disable graphics
> emulation)
> ```
> 
> (2) *4.2.1 (E5-2670 * 2)*
> *```*
> qemu-system-x86_64 -machine pc,help
> pc-i440fx-4.2.nvdimm-persistence=string (Set NVDIMM persistenceValid values
> are cpu, mem-ctrl)
> pc-i440fx-4.2.pflash0=str (Node name or ID of a block device to use as a
> backend)
> pc-i440fx-4.2.nvdimm=bool (Set on/off to enable/disable NVDIMM
> instantiation)
> pc-i440fx-4.2.pflash1=str (Node name or ID of a block device to use as a
> backend)
> pc-i440fx-4.2.vmport=OnOffAuto (Enable vmport (pc & q35))
> pc-i440fx-4.2.sata=bool
> pc-i440fx-4.2.pit=bool
> pc-i440fx-4.2.smm=OnOffAuto (Enable SMM (pc & q35))
> pc-i440fx-4.2.smbus=bool
> pc-i440fx-4.2.max-ram-below-4g=size (Maximum ram below the 4G boundary
> (32bit boundary))
> pc-i440fx-4.2.suppress-vmdesc=bool (Set on to disable self-describing
> migration)
> pc-i440fx-4.2.append=string (Linux kernel command line)
> pc-i440fx-4.2.accel=string (Accelerator list)
> pc-i440fx-4.2.dtb=string (Linux kernel device tree file)
> pc-i440fx-4.2.mem-merge=bool (Enable/disable memory merge support)
> pc-i440fx-4.2.dumpdtb=string (Dump current dtb to a file and quit)
> pc-i440fx-4.2.phandle-start=int (The first phandle ID we may generate
> dynamically)
> pc-i440fx-4.2.igd-passthru=bool (Set on/off to enable/disable igd passthrou)
> pc-i440fx-4.2.kvm-shadow-mem=int (KVM shadow MMU size)
> pc-i440fx-4.2.dump-guest-core=bool (Include guest memory in a core dump)
> pc-i440fx-4.2.memory-encryption=string (Set memory encryption object to use)
> pc-i440fx-4.2.firmware=string (Firmware image)
> pc-i440fx-4.2.usb=bool (Set on/off to enable/disable usb)
> pc-i440fx-4.2.kernel-irqchip=on|off|split (Configure KVM in-kernel irqchip)
> pc-i440fx-4.2.graphics=bool (Set on/off to enable/disable graphics
> emulation)
> pc-i440fx-4.2.initrd=string (Linux initial ramdisk file)
> pc-i440fx-4.2.dt-compatible=string (Overrides the "compatible" property of
> the dt root node)
> pc-i440fx-4.2.kernel=string (Linux kernel image file)
> pc-i440fx-4.2.enforce-config-section=bool (Set on to enforce configuration
> section migration)
> ```
> 
> [1] https://wiki.qemu.org/Hosts/Linux#Building_QEMU_for_Linux
> 
> Sincerely,
> Jack
> 
> Eduardo Habkost <ehabkost@redhat.com> 於 2020年11月17日 週二 上午3:02寫道：
> 
> > On Mon, Nov 16, 2020 at 01:51:37PM +0100, Philippe Mathieu-Daudé wrote:
> > > Cc'ing Igor & Eduardo.
> >
> > Thanks!
> >
> > >
> > > On 11/13/20 10:17 AM, Jack wrote:
> > > > Hi all,
> > > >
> > > > As I follow the document[1] to enable hmat, it fails and shows the
> > message:
> > > >   qemu-system-x86_64: Property '.hmat' not found
> > > >
> > > > My QEMU version is 5.1.90
> >
> > Do you have the output of `qemu-system-x86_64 -version`, and more
> > information on how your binary was built?
> >
> > Output of `-machine help` and `-machine pc,help` would be useful
> > to debug it, too.
> >
> > I can't reproduce it here.  I've tested both qemu.git master
> > (commit cb5ed407a1dd) and v5.2.0-rc (commit 3d6e32347a3b).
> >
> >   [build/(cb5ed407a1...)]$ ./qemu-system-x86_64 -version
> >   QEMU emulator version 5.1.91 (v5.2.0-rc1-107-gcb5ed407a1)
> >   Copyright (c) 2003-2020 Fabrice Bellard and the QEMU Project developers
> >   [build/(cb5ed407a1...)]$ ./qemu-system-x86_64 -machine hmat=on -m 2G
> > -object memory-backend-ram,size=1G,id=m0 -object
> > memory-backend-ram,size=1G,id=m1 -smp 2 -numa node,nodeid=0,memdev=m0 -numa
> > node,nodeid=1,memdev=m1,initiator=0 -numa cpu ,node-id=0,socket-id=0 -numa
> > cpu,node-id=0,socket-id=1 -numa
> > hmat-lb,initiator=0,target=0,hierarchy=memory,data-type=access-latency,latency=5
> > -numa
> > hmat-lb,initiator=0,target=0,hierarchy=memory,data-type=access-bandwidth,bandwidth=200M
> > -numa
> > hmat-lb,initiator=0,target=1,hierarchy=memory,data-type=access-latency,latency=10
> > -numa
> > hmat-lb,initiator=0,target=1,hierarchy=memory,data-type=access-bandwidth,bandwidth=100M
> > -numa
> > hmat-cache,node-id=0,size=10K,level=1,associativity=direct,policy=write-back,line=8
> > -numa
> > hmat-cache,node-id=1,size=10K,level=1,associativity=direct,policy=write-back,line=8
> > -cpu host -vga virtio -accel kvm
> >   [VM boots]
> >
> >
> > > >
> > > > Does anyone know why?
> > > >
> > > > Here is my command:
> > > >
> > > > ```
> > > > $ sudo qemu-system-x86_64 \
> > > > -machine hmat=on \
> > > > -m 2G \
> > > > -object memory-backend-ram,size=1G,id=m0 \
> > > > -object memory-backend-ram,size=1G,id=m1 \
> > > > -smp 2 \
> > > > -numa node,nodeid=0,memdev=m0 \
> > > > -numa node,nodeid=1,memdev=m1,initiator=0 \
> > > > -numa cpu,node-id=0,socket-id=0 \
> > > > -numa cpu,node-id=0,socket-id=1 \
> > > > -numa
> > > >
> > hmat-lb,initiator=0,target=0,hierarchy=memory,data-type=access-latency,latency=5
> > > > \
> > > > -numa
> > > >
> > hmat-lb,initiator=0,target=0,hierarchy=memory,data-type=access-bandwidth,bandwidth=200M
> > > > \
> > > > -numa
> > > >
> > hmat-lb,initiator=0,target=1,hierarchy=memory,data-type=access-latency,latency=10
> > > > \
> > > > -numa
> > > >
> > hmat-lb,initiator=0,target=1,hierarchy=memory,data-type=access-bandwidth,bandwidth=100M
> > > > \
> > > > -numa
> > > >
> > hmat-cache,node-id=0,size=10K,level=1,associativity=direct,policy=write-back,line=8
> > > > \
> > > > -numa
> > > >
> > hmat-cache,node-id=1,size=10K,level=1,associativity=direct,policy=write-back,line=8
> > > > \
> > > > -cpu host \
> > > > -m 4g -vga virtio -hda ubuntu20.04.qcow2 \
> > > > -nic user,model=virtio \
> > > > -nic tap,model=e1000 \
> > > > -nic tap,model=e1000 \
> > > > -accel kvm
> > > > ```
> > > >
> > > > Thanks.
> > > >
> > > > [1]
> > > >
> > https://www.qemu.org/docs/master/system/qemu-manpage.html?highlight=numa
> > > >
> > > >
> > > > Sincerely,
> > > > Jack
> > > >
> > >
> >
> > --
> > Eduardo
> >
> >

-- 
Eduardo