linux-kernel - Re: [PATCH v9 01/12] acpi/ghes: add a firmware file with HEST address

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Message-ID: <20241001105426.48598baa@sal.lan>
Date: Tue, 1 Oct 2024 10:54:26 +0200
From: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To: Igor Mammedov <imammedo@...hat.com>
Cc: "Michael S. Tsirkin" <mst@...hat.com>, Ani Sinha <anisinha@...hat.com>,
 Dongjiu Geng <gengdongjiu1@...il.com>, linux-kernel@...r.kernel.org,
 qemu-arm@...gnu.org, qemu-devel@...gnu.org
Subject: Re: [PATCH v9 01/12] acpi/ghes: add a firmware file with HEST
 address

Em Mon, 16 Sep 2024 13:05:06 +0200
Igor Mammedov <imammedo@...hat.com> escreveu:

> > But no idea how to start a machine using a saved state.  
> 
> see https://www.linux-kvm.org/page/Migration
> 'savevm/loadvm to an external state file (using pseudo-migration)' section
> 

It didn't work. Is migration currently working between 9.1 and 9.2?

I did a compilation of qemu version v9.1.0-rc0 and saved the state.

Then, on vanilla 9.2 (changeset 01dc65a3bc26), I tried to restore the
state with both "virt" and "virt-9.1". None worked:


$ qemu-system-aarch64 -m 4g,maxmem=8G,slots=8 -M type=virt-9.1,nvdimm=on,gic-version=3,ras=on -cpu max -smp 4 -numa node,nodeid=0,cpus=0-3,memdev=mem0 --nographic -monitor telnet:127.0.0.1:1234,server,nowait -incoming "exec: gzip -c -d statefile.gz" -no-reboot -bios /new_devel/edac/emulator/QEMU_EFI-silent.fd -kernel /new_devel/edac/work/arm64_build/arch/arm64/boot/Image.gz -device pcie-root-port,id=root_port1 -device virtio-blk-pci,drive=hd -device virtio-net-pci,netdev=mynet,id=bob -drive if=none,file=/new_devel/edac/emulator/debian.qcow2,format=qcow2,id=hd -object memory-backend-ram,size=4G,id=mem0 -netdev type=user,id=mynet,hostfwd=tcp::5555-:22 -qmp tcp:localhost:4445,server=on,wait=off -append 'earlycon nomodeset root=/dev/vda1 fsck.mode=skip tp_printk maxcpus=4'
qemu-system-aarch64: error while loading state for instance 0x0 of device 'cpu'
qemu-system-aarch64: load of migration failed: Operation not permitted

$ qemu-system-aarch64 -m 4g,maxmem=8G,slots=8 -M type=virt,nvdimm=on,gic-version=3,ras=on -cpu max -smp 4 -numa node,nodeid=0,cpus=0-3,memdev=mem0 --nographic -monitor telnet:127.0.0.1:1234,server,nowait -incoming "exec: gzip -c -d statefile.gz" -no-reboot -bios /new_devel/edac/emulator/QEMU_EFI-silent.fd -kernel /new_devel/edac/work/arm64_build/arch/arm64/boot/Image.gz -device pcie-root-port,id=root_port1 -device virtio-blk-pci,drive=hd -device virtio-net-pci,netdev=mynet,id=bob -drive if=none,file=/new_devel/edac/emulator/debian.qcow2,format=qcow2,id=hd -object memory-backend-ram,size=4G,id=mem0 -netdev type=user,id=mynet,hostfwd=tcp::5555-:22 -qmp tcp:localhost:4445,server=on,wait=off -append 'earlycon nomodeset root=/dev/vda1 fsck.mode=skip tp_printk maxcpus=4'
qemu-system-aarch64: Machine type received is 'virt-9.1' and local is 'virt-9.2'
qemu-system-aarch64: load of migration failed: Invalid argument

Did I made something wrong?

Regards,
Mauro