[oerv 24.03 sp3] qemu镜像中嵌套启动qemu镜像出现systemd初始化错误

**【缺陷描述】：openEuler24.03sp3的qemu镜像中用qemu启动ubuntu24.04作为guest时，guest系统的systemd初始化失败而无法进入系统**

**一、缺陷信息**

**【缺陷所属的os版本】openEuler-24.03-LTS-SP3**

**【内核版本】kernel-6.6.0-115.0.0.94**

**【环境信息】**
硬件信息
- qemu virt

**【问题复现步骤】**
使用qemu-system-riscv64启动[oerv 24.03 sp3 RVA20 qemu镜像](https://repo.tarsier-infra.isrc.ac.cn/openEuler-RISC-V/testing/20251110/v0.1/QEMU/openEuler-24.03SP3-V1-base-qemu-testing-uefi.qcow2.zst)，在其中嵌套使用qemu启动ubuntu24.04.3镜像。

具体步骤参考 [虚拟化兼容性测试](https://github.com/openeuler-riscv/oerv-qa/tree/main/docs/virtualization_compatibility)。

**【实际结果】**
systemd 初始化失败而 Freezing execution，无法进入系统。

```bash
[  576.617458] Run /init as init process
Loading, please wait...
Starting systemd-udevd version 255.4-1ubuntu8.10
[  860.942501] rtc-efi rtc-efi.0: registered as rtc1
Failed to wait for daemon to reply: Connection timed out
[ 1008.869087] virtio_net virtio2 enp1s0: renamed from eth1
Begin: Loading essential drivers ... [ 1051.975021] hid: raw HID events driver (C) Jiri Kosina
[ 1054.466278] raid6: int64x8  gen()     0 MB/s
[ 1054.591886] raid6: int64x4  gen()     1 MB/s
[ 1054.674603] raid6: int64x2  gen()    19 MB/s
[ 1054.763078] raid6: int64x1  gen()    10 MB/s
[ 1054.815716] raid6: using algorithm int64x2 gen() 19 MB/s
[ 1055.018539] raid6: .... xor() 0 MB/s, rmw enabled
[ 1055.099378] raid6: using intx1 recovery algorithm
[ 1055.638934] xor: measuring software checksum speed
[ 1055.891332]    8regs           :    21 MB/sec
[ 1055.968528]    32regs          :    63 MB/sec
[ 1056.051158] xor: using function: 32regs (63 MB/sec)
[ 1056.813473] async_tx: api initialized (async)
[ 1061.425440] usbcore: registered new interface driver usbhid
[ 1061.461308] usbhid: USB HID core driver
done.
Begin: Running /scripts/init-premount ... done.
Begin: Mounting root file system ... Begin: Running /scripts/local-top ... [ 1105.038112] [drm] pci: virtio-gpu-pci detected at 0000:06:00.0
[ 1105.504230] [drm] features: -virgl +edid -resource_blob -host_visible
[ 1105.523284] [drm] features: -context_init
[ 1105.781818] [drm] number of scanouts: 1
[ 1105.862362] [drm] number of cap sets: 0
done.
Begin: Running /scripts/local-premount ... [ 1119.643993] [drm] Initialized virtio_gpu 0.1.0 for 0000:06:00.0 on minor 0
Scanning for Btrfs filesystems
[ 1161.726466] Btrfs loaded, zoned=yes, fsverity=yes
[ 1165.674073] Console: switching to colour frame buffer device 160x50
[ 1172.996849] virtio-pci 0000:06:00.0: [drm] fb0: virtio_gpudrmfb frame buffer device
done.
Begin: Will now check root file system ... fsck from util-linux 2.39.3
[/usr/sbin/fsck.ext4 (1) -- /dev/vda1] fsck.ext4 -a -C0 /dev/vda1
cloudimg-rootfs: clean, 97127/575424 files, 656078/1150203 blocks
done.
[ 1317.857352] EXT4-fs (vda1): mounted filesystem 032b83da-6353-435f-b9db-ff1182943787 ro with ordered data mode. Quota mode: none.
done.
Begin: Running /scripts/local-bottom ... done.
Begin: Running /scripts/init-bottom ... Failed to send exit request: Resource temporarily unavailable
done.
[ 1543.009500] systemd[1]: Inserted module 'autofs4'
[ 1578.150586] systemd[1]: systemd 255.4-1ubuntu8.10 running in system mode (+PAM +AUDIT +SELINUX +APPARMOR +IMA +SMACK +SECCOMP +GCRYPT -GNUTLS +OPENSSL +ACL +BLKID +CURL +ELFUTILS +FIDO2 +IDN2 -IDN +IPTC +KMOD +LIBCRYPTSETUP +LIBFDISK +PCRE2 -PWQUALITY +P11KIT +QRENCODE +TPM2 +BZIP2 +LZ4 +XZ +ZLIB +ZSTD -BPF_FRAMEWORK -XKBCOMMON +UTMP +SYSVINIT default-hierarchy=unified)
[ 1578.401193] systemd[1]: Detected virtualization qemu.
[ 1578.606031] systemd[1]: Detected architecture riscv64.

Welcome to Ubuntu 24.04.3 LTS!

[ 1582.288481] systemd[1]: Hostname set to <ubuntu>.
[ 1583.498830] systemd[1]: Initializing machine ID from VM UUID.
[ 1584.661638] systemd[1]: Installed transient /etc/machine-id file.
[ 1604.174708] systemd[1]: Failed to configure loopback network device, ignoring: Connection timed out
[ 2496.427926][    C2] hrtimer: interrupt took 24742995 ns
[ 1763.442763] systemd[1]: Failed to fork off sandboxing environment for executing generators: Protocol error
[!!!!!!] Failed to start up manager.
[ 1767.836709] systemd[1]: Freezing execution.
```

**【期望结果】**
guest系统正常启动，进入 shell。

**【其他相关附件信息】**

![输入图片说明](https://foruda.gitee.com/images/1763722541520858862/7b2307ba_13857633.png "2.png")

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