> In this case, have you tried reading and writing to the memory segment being
> mmap'd from userland?
>
> Here's an example mmap'ing device driver if you need to see that:
> https://github.com/claudioscordino/mmap_alloc
That would not have worked, but your example code did give me an idea. I was
In this case, have you tried reading and writing to the memory segment
being mmap'd from userland?
Here's an example mmap'ing device driver if you need to see that:
https://github.com/claudioscordino/mmap_alloc
On Tue, Jan 12, 2016 at 6:10 PM, Jethro Beekman wrote:
> I'm writing a device driver
I'm writing a device driver for a memory-mapped device on x86-64. I'm mapping
the device in the kernel using ioremap_cache(). My file_operations.mmap function
is as follows:
static int dev_mmap(struct file *filep, struct vm_area_struct *vma) {
vma->vm_page_prot.pgprot|=_PAGE_BIT_RW;
