Dear Ron,
please a question ... i remember i used qemu during the years i was an engineering student. I need to search in my far memory.
I'm writing i'm installing qemu.
1- If i'm not mistaken, qemu gives a virtual machine where check coreboot.
In which way i need to instruct qemu about the dedicated hardware on which i want test coreboot ?
you can't. You can test qemu on the q35 chipset. That will at least let you learn about coreboot.
2- Is it a bootable version of superiotool that allows me to check the hardware of a PC without install it ?
not that I know of.