Chris Metcalf 9f9c0382cd arch/tile: Add driver to enable access to the user dynamic network. ... This network (the "UDN") connects all the cpus on the chip in a wormhole-routed dynamic network. Subrectangles of the chip can be allocated by a "create" ioctl on /dev/hardwall, and then to access the UDN in that rectangle, tasks must perform an "activate" ioctl on that same file object after affinitizing themselves to a single cpu in the region. Sending a wormhole-routed message that tries to leave that subrectangle causes all activated tasks to receive a SIGILL (just as they would if they tried to access the UDN without first activating themselves to a hardwall rectangle). The original submission of this code to LKML had the driver instantiated under /proc/tile/hardwall. Now we just use a character device for this, conventionally /dev/hardwall. Some futures planning for the TILE-Gx chip suggests that we may want to have other types of devices that share the general model of "bind a task to a cpu, then 'activate' a file descriptor on a pseudo-device that gives access to some hardware resource". As such, we are using a device rather than, for example, a syscall, to set up and activate this code. As part of this change, the compat_ptr() declaration was fixed and used to pass the compat_ioctl argument to the normal ioctl. So far we limit compat code to 2GB, so the difference between zero-extend and sign-extend (the latter being correct, eventually) had been overlooked. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> Acked-by: Arnd Bergmann <arnd@arndb.de>		2010-07-06 13:34:15 -04:00
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asm-offsets.c
backtrace.c
compat.c
compat_signal.c
early_printk.c
entry.S
hardwall.c	arch/tile: Add driver to enable access to the user dynamic network.	2010-07-06 13:34:15 -04:00
head_32.S
hvglue.lds	arch/tile: Enable more sophisticated IRQ model for 32-bit chips.	2010-07-06 13:34:01 -04:00
init_task.c
intvec_32.S	arch/tile: Add driver to enable access to the user dynamic network.	2010-07-06 13:34:15 -04:00
irq.c	arch/tile: Enable more sophisticated IRQ model for 32-bit chips.	2010-07-06 13:34:01 -04:00
machine_kexec.c
Makefile	arch/tile: Add driver to enable access to the user dynamic network.	2010-07-06 13:34:15 -04:00
messaging.c
module.c
pci-dma.c
proc.c
process.c	Revert adding some arch-specific signal syscalls to <linux/syscalls.h>.	2010-06-07 09:29:59 -04:00
ptrace.c
reboot.c
regs_32.S
relocate_kernel.S
setup.c
signal.c	Revert adding some arch-specific signal syscalls to <linux/syscalls.h>.	2010-06-07 09:29:59 -04:00
single_step.c
smp.c	arch/tile: Enable more sophisticated IRQ model for 32-bit chips.	2010-07-06 13:34:01 -04:00
smpboot.c
stack.c
sys.c	Revert adding some arch-specific signal syscalls to <linux/syscalls.h>.	2010-06-07 09:29:59 -04:00
tile-desc_32.c
time.c
tlb.c
traps.c
vmlinux.lds.S