How to run two nvme devices in simplessd-fs?

[GrootLiu]

Running Environment (please complete the following information):

• Host OS and Kernel version: [Ubuntu 22.04 with Linux 6.5.0]
• Compiler version used to build SimpleSSD-FullSystem: [GCC 8.4.0]
• SimpleSSD-FullSystem version: [96377cf]
• SimpleSSD version: [v2.0.13]
• Guest Kernel version: [Linux 4.9 compiled with aarch64-linux-gnu-gcc]
• Compiler version used to build Guest Kernel binary: [Linaro GCC 14.0.0]

Execution information

• Execution command line of gem5:
  ./build/ARM/gem5.opt --debug-flag=M5Print --debug-file=debug.txt ./configs/example/fs.py --kernel=my_new_kernel_image --dtb-file=armv8_gem5_v1_4cpu.dtb --machine-type=VExpress_GEM5_V1 --num-cpu=4 --cpu-clock=2GHz --caches --l2cache --cpu-type=AtomicSimpleCPU --mem-size=4GB --mem-type=DDR4_2400_8x8 --ssd-interface=nvme2 --ssd-config=./src/dev/storage/simplessd/config/sample.cfg

Explain what you want to ask here:

"I want to attach two NVMe devices to gem5-fs, so I edited the FSConfig.py file.:

# configs/common/FSConfig.py: 288
    if simplessd['interface'] == 'nvme':
        self.pci_nvme = NVMeInterface(SSDConfig=simplessd['config'])
        pci_devices.append(self.pci_nvme)
    elif simplessd['interface'] == 'nvme2':
        self.pci_nvme_1 = NVMeInterface(SSDConfig=simplessd['config'])
        self.pci_nvme_2 = NVMeInterface(SSDConfig=simplessd['config'])
        pci_devices.append(self.pci_nvme_1)
        pci_devices.append(self.pci_nvme_2)

But, when I boot the system, there is only one NVMe device in the system. The other can't be probed correctly.

pci info:

root@genericarmv8:~# lspci
00:03.0 Class 0108: 144d:2001
00:02.0 Class 0108: 144d:2001
00:01.0 Class 0101: 8086:7111

device info

root@genericarmv8:~# ls /dev/nvme*
/dev/nvme1    /dev/nvme1n1

And, there is a error info in dmesg:

[   60.829371] nvme nvme0: I/O 232 QID 0 timeout, disable controller
[   60.829414] nvme nvme0: Identify Controller failed (-4)
[   60.829421] nvme nvme0: Removing after probe failure status: -5

So, I hope someone can help me to attach another nvme device to system correctly.

Thanks.