Hi all,
This is my first post on the list so please
bare with me!
I would like to use Xen hypervisor for
running a Linux guest but I want to prohibit Linux from accessing (i.e. writing
to) some physical memory locations in which registers of some x86
peripherals are located in. For instance, I would like to prevent Linux (not
only the Linux kernel code but anyone who tries to access these I/O ports and
memory mapped registers by e.g. writing a kernel module, etc.) from accessing I/O
ports 3F8h – 3FFh (serial port 1) and HPET memory mapped registers at 0xFED00000
- 0xFED003FF.
Is it possible Xen to redirect these accesses to a printf displaying
for instance a message saying “The access to this memory location is not
allowed” or just ignore them?
Please have a look at http://img209.imageshack.us/img209/4431/linuxmoduleaccessesproh.gif
for a graphical overview of what I want to achieve.
Any help will be much appreciated.
Kind Regards,
Ioannis.
