Hi, I am new to kernel and working on a college project.
I have kernel module which takes process ID. Based on the PID, I walk its page tables and get to PTE for a particular VMA area. I convert PTE to physical address (phy_addr) and now I want to read from the that physical address. I have made sure the page containing the physical address is mapped but if I do printk (*phys_addr) , then kernel crashes. I think I am missing some important concept here. Do I need another driver to access physical space, may be a PCI driver as RAM being a PCI device ? Thanks Alan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
