Kernel panic: device not found

Hi,

I just completed my LFS (version 9.1, sysvinit) project with pkgutils installed, but I can't seem to boot into my system. I get a kernel panic about VFS device "nvme0n1p3" not found type of error.

On this computer, I can choose between using AHCI or RAID or disable it completely in my BIOS settings, and right now I have the AHCI set in my BIOS. My grub.cfg is

Code:# Begin /boot/grub/grub.cfg
set default=0
set timeout=5

insmod gzio
insmod part_gpt
insmod ext2
#set root=(hd[x], gpt[y])
# hd[x] is the drive of the LFS partion and gpt[y] is the partition
set root=(hd0,gpt3)

insmod efi_gop
insmod efi_uga
insmod font
if loadfont /boot/grub/fonts/unicode.pf2; then
loadfont /boot/grub/fonts/unicode.pf2
set gfxmode=auto
insmod gfxterm
set gfxpayload=keep
terminal_output gfxterm
fi

menuentry "GNU/Linux, Linux 5.5.9-lfs-9.1" {
linux /boot/vmlinuz-5.5.9-lfs-9.1 root=/dev/nvme0n1p3 ro
initrd /boot/microcode.img
}and my fstab is

Code:# Begin /etc/fstab

# file system mount-point type options dump fsck
# order

/dev/nvme0n1p2 /boot/efi vfat defaults 0 1
/dev/nvme0n1p3 / ext4 defaults 0 1
/dev/nvme0n1p4 swap swap pri=1 0 0
/dev/nvme0n1p5 /var ext4 defaults 0 2
/dev/nvme0n1p6 /usr ext4 defaults 0 2
/dev/nvme0n1p7 /opt ext4 defaults 0 2
/dev/nvme0n1p8 /home ext4 defaults 0 2
proc /proc proc nosuid,noexec,nodev 0 0
sysfs /sys sysfs nosuid,noexec,nodev 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
tmpfs /run tmpfs defaults 0 0
devtmpfs /dev devtmpfs mode=0755,nosuid 0 0
efivarfs /sys/firmware/efi/efivars efivarfs defaults 0 1

# End /etc/fstabI even tried using UUID in fstab (instead of device names) as well as the root=UUID=... kernel parameter in grub.cfg, but then it would kernel panic about a VFS error unknown root option "UUID=". I do realize that "initrd" is not part of LFS but BLFS, but I thought it would help to have it if I was going to use the UUID root option in grub.cfg. However, it still wouldn't boot even after using early kernel loading.

I can't seem to figure out what I'm doing wrong here. I'll appreciate any suggestions or tips that can help me figure this out.

** EDIT **
I do have the NVMe configured into my kernel as described here:

https://wiki.gentoo.org/wiki/NVMe

I've also added a picture of the kernel panic trace leading up to the error.
Attached Thumbnails