Hi:
I am writing a UML device driver wrapper (uml/drivers), and I need to
convert an address of a UML user-space process into an address of UML kernel
space.
i.e.
Process_running_within_UML(){
char uml_usr_buffer[MAXBUF];
.....
ret = ioctl(dvk_fd,DVK_IOCSDCINIT, (int) uml_usr_buffer);
}
UML ioctl() syscall is translated by UML to
os_ioctl_generic<https://elixir.bootlin.com/linux/v4.9.88/ident/os_ioctl_generic>()
which then calls host ioctl().
The uml_usr_buffer address is a UML virtual address, not host virtual address.
I need to convert this UML user-space virtual address into user-space HOST
virtual address.
Can I use, virt_to_phys() ??
Thanks in advance.
PAP
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