编译驱动模块：
make M=drivers/nvme编译全部模块：
sudo su
make -j 100
# make modules_install -j 100
make INSTALL_MOD_STRIP=1 modules_install -j 100
make install
update-grub
dmesg -T --follow | grep nvme > ./nvme.log
qemu-system-x86_64 -hda focal-server-cloudimg-amd64-01.img -m 4G -smp 4 -M pc -cpu host -enable-kvm -machine kernel_irqchip=on -boot c -net nic -net user,hostfwd=tcp::2222-:22 -vnc :1 -name "MyVM1" -device vfio-pci,sysfsdev=/sys/bus/mdev/devices/5ebb9deb-e018-4b8a-a3a0-d4a89f591e53
/usr/local/qemu-7.2.0/bin/qemu-system-x86_64 \
-hda /home/zzq/Downloads/LPNS/ubuntu-20.04-server-cloudimg-amd64-01.img \
-m 4G \
-smp 4 \
-M pc \
-cpu host \
-enable-kvm \
-machine kernel_irqchip=on \
-boot c\
-net nic \
-net user,hostfwd=tcp::2222-:22 \
-vnc :1 \
-name "MyVM1" \
-drive file=/home/zzq/Downloads/LPNS/config.img,format=raw,if=virtio
rmmod nvme-mdev
rmmod nvme
modprobe nvme-mdev mdev_device_num=8 total_threshold=280
modprobe nvme mdev_queues=8
# PCI_DEVICE=/sys/bus/pci/devices/0000:86:00.0
# lspci -nn | grep -i nvme
PCI_DEVICE=/sys/bus/pci/devices/0000:08:00.0
UUID=$(uuidgen)
MDEV_DEVICE=/sys/bus/mdev/devices/$UUID
echo $UUID > $PCI_DEVICE/mdev_supported_types/nvme-2Q_V1/create
echo n1p5 > $MDEV_DEVICE/namespaces/add_namespace
echo 5 > $MDEV_DEVICE/settings/iothread_cpu
echo 2 > ${MDEV_DEVICE}/settings/qos
/usr/local/qemu-7.2.0/bin/qemu-system-x86_64 \
-hda /home/zzq/cloud-images/ubuntu-20.04-server-cloudimg-amd64-01.img \
-m 4G \
-smp 4 \
-M pc \
-cpu host \
-enable-kvm \
-machine kernel_irqchip=on \
-boot c \
-net nic \
-net user,hostfwd=tcp::2222-:22 \
-vnc :1 \
-name "MyVM1" \
-device vfio-pci,sysfsdev=/sys/bus/mdev/devices/264c35c8-7ad5-42bc-9921-b18f688f0228 \
-drive file=/home/zzq/cloud-images/seed.img,format=raw,if=virtio
#
qemu-system-x86_64 \
-hda ./focal-server-cloudimg-amd64-01.img \
-m 4G \
-smp 4 \
-M pc \
-cpu host \
-enable-kvm \
-machine kernel_irqchip=on \
-boot c \
-net nic \
-net user,hostfwd=tcp::2222-:22 \
-vnc :1 \
-name "MyVM1" \
-device vfio-pci,sysfsdev=/sys/bus/mdev/devices/383eb40c-1651-4c49-b5b7-f10ea12be79b \
-drive file=./seed.img,format=raw,if=virtio
/usr/local/qemu-7.2.0/bin/qemu-system-x86_64 \
-hda /home/zzq/Downloads/LPNS/ubuntu-20.04-server-cloudimg-amd64-01.img \
-m 4G \
-smp 4 \
-M pc \
-cpu host \
-enable-kvm \
-machine kernel_irqchip=on \
-boot c \
-net nic \
-net user,hostfwd=tcp::2222-:22 \
-vnc :1 \
-name "MyVM1" \
-device vfio-pci,sysfsdev=/sys/bus/mdev/devices/ec92bea0-8561-4429-8033-adaf7a089914 \
-drive file=/home/zzq/Downloads/LPNS/seed.img,format=raw,if=virtio \
-serial stdio \
-D ./qemu-debug.log \
-d trace:all