From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
To: Samarth Saxena <samarths@cadence.com>, ben.widawsky@intel.com
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: Re: [CXL volatile MEM] - Qemu command to turn on HMAT and NUMA fails with assertion
Date: Tue, 10 Aug 2021 12:28:15 +0100 [thread overview]
Message-ID: <YRJizxKbMxpwhSrL@work-vm> (raw)
In-Reply-To: <DM6PR07MB8143073FA28EA05BAF7D8B24DDF69@DM6PR07MB8143.namprd07.prod.outlook.com>
* Samarth Saxena (samarths@cadence.com) wrote:
> Hi All,
>
> I am trying the following command to run Qemu with Kernel 5.14.
cc'ing in Ben who I think owns the CXL stuff.
> qemu-system-x86_64 -M q35,accel=kvm,nvdimm=on,cxl=on,hmat=on -m 8448M,slots=2,maxmem=16G -smp 8,sockets=2,cores=2,threads=2 -hda /lan/dscratch/singhabh/shradha/ubuntu-20.10-64_with_orig_driver_backup.qcow2 -enable-kvm -usbdevice tablet -L $VB_ROOT/etc/vm/common/ -object memory-backend-ram,id=cxl-ram,share=on,size=256M -device "pxb-cxl,id=cxl.0,bus=pcie.0,bus_nr=52,uid=0,len-window-base=1,window-base[0]=0x4c0000000,memdev[0]=cxl-ram" -device cxl-rp,id=rp0,bus=cxl.0,addr=0.0,chassis=0,slot=0 -device cxl-type3,bus=rp0,memdev=cxl-ram,id=cxl-vmem0,size=256M -numa node,nodeid=0,memdev=cxl-ram -object memory-backend-ram,id=other-ram,size=8G,prealloc=n,share=off -numa node,nodeid=1,memdev=other-ram,initiator=0 -numa cpu,node-id=0,socket-id=0 -numa cpu,node-id=0,socket-id=1
You probably need to state which qemu tree and version you're using
here.
> I get the following crash before the machine starts to boot.
>
> qemu-system-x86_64: ../softmmu/memory.c:2443: memory_region_add_subregion_common: Assertion `!subregion->container' failed.
It's probably best to check with Ben, but you'll want a backtrace and
figure out which subregion and region you're dealing with.
Dave
>
> Please help me find what's wrong here.
>
> Regards,
> [CadenceLogoRed185Regcopy1583174817new51584636989.png]<https://www.cadence.com/en_US/home.html>
> Samarth Saxena
> Sr Principal Software Engineer
> T: +911204308300
> [UIcorrectsize1583179003.png]<https://www.cadence.com/en_US/home.html>
> [16066EmailSignatureFortune100Best2021White92x1271617625037.png]<https://www.cadence.com/en_US/home/company/careers.html>
>
>
>
>
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
next prev parent reply other threads:[~2021-08-10 11:29 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-09 16:38 [CXL volatile MEM] - Qemu command to turn on HMAT and NUMA fails with assertion Samarth Saxena
2021-08-10 11:28 ` Dr. David Alan Gilbert [this message]
2021-08-10 17:38 ` Samarth Saxena
2021-08-10 18:12 ` Ben Widawsky
2021-08-15 10:14 ` Samarth Saxena
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