Pull generic execve() changes from Al Viro:
"This introduces the generic kernel_thread() and kernel_execve()
functions, and switches x86, arm, alpha, um and s390 over to them."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (26 commits)
s390: convert to generic kernel_execve()
s390: switch to generic kernel_thread()
s390: fold kernel_thread_helper() into ret_from_fork()
s390: fold execve_tail() into start_thread(), convert to generic sys_execve()
um: switch to generic kernel_thread()
x86, um/x86: switch to generic sys_execve and kernel_execve
x86: split ret_from_fork
alpha: introduce ret_from_kernel_execve(), switch to generic kernel_execve()
alpha: switch to generic kernel_thread()
alpha: switch to generic sys_execve()
arm: get rid of execve wrapper, switch to generic execve() implementation
arm: optimized current_pt_regs()
arm: introduce ret_from_kernel_execve(), switch to generic kernel_execve()
arm: split ret_from_fork, simplify kernel_thread() [based on patch by rmk]
generic sys_execve()
generic kernel_execve()
new helper: current_pt_regs()
preparation for generic kernel_thread()
um: kill thread->forking
um: let signal_delivered() do SIGTRAP on singlestepping into handler
...
Ease the deployment of clkdev by providing a default asm/clkdev.h for
use if the arch does not have an include/asm/clkdev.h.
Due to limitations in Kbuild we manually add clkdev.h to all
architectures that don't have one rather than having the header appear
by default.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Reviewed-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Pull treewide kbuild cleanup from Michal Marek:
"Paul Bolle did a cleanup of <asm/*.h> headers in various
architectures. Because the patch touch several architectures at
once, it was easiest for me to apply them to the kbuild tree."
* 'trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
Remove useless wrappers of asm-generic/rmap.h
Remove useless wrappers of asm-generic/ipc.h
Remove useless wrappers of asm-generic/cpumask.h
This change uses the TRIO IOMMU to map the PCI DMA space and physical
memory at different addresses. We also now use the dma_mapping_ops
to provide support for non-PCI DMA, PCIe DMA (64-bit) and legacy PCI
DMA (32-bit). We use the kernel's software I/O TLB framework
(i.e. bounce buffers) for the legacy 32-bit PCI device support since
there are a limited number of TLB entries in the IOMMU and it is
non-trivial to handle indexing, searching, matching, etc. For 32-bit
devices the performance impact of bounce buffers should not be a concern.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
mn10300 has a header (in its include/asm directory) that is a thin
wrapper around asm-generic/ipc.h. This wrapper is useless, since that
header doesn't exist. It is also unused (no file includes asm/ipc.h).
hexagon and tile generate similar headers at build time (using a
generic-y entry in include/asm/Kbuild). These generated headers are
useless and unused too.
Remove this header and these generic-y entries.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Acked-by: Richard Kuo <rkuo@codeaurora.org>
Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Acked-by: David Howells <dhowells@redhat.com> [MN10300]
Signed-off-by: Michal Marek <mmarek@suse.cz>
We already had a syscall that did some dcache flushing, but it was
not used in practice. Make it MIPS compatible instead so it can
do both the DCACHE and ICACHE actions. We have code that wants to
be able to use the ICACHE flush mode from userspace so this change
enables that.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This change introduces new flags for the hv_install_context()
API that passes a page table pointer to the hypervisor. Clients
can explicitly request 4K, 16K, or 64K small pages when they
install a new context. In practice, the page size is fixed at
kernel compile time and the same size is always requested every
time a new page table is installed.
The <hv/hypervisor.h> header changes so that it provides more abstract
macros for managing "page" things like PFNs and page tables. For
example there is now a HV_DEFAULT_PAGE_SIZE_SMALL instead of the old
HV_PAGE_SIZE_SMALL. The various PFN routines have been eliminated and
only PA- or PTFN-based ones remain (since PTFNs are always expressed
in fixed 2KB "page" size). The page-table management macros are
renamed with a leading underscore and take page-size arguments with
the presumption that clients will use those macros in some single
place to provide the "real" macros they will use themselves.
I happened to notice the old hv_set_caching() API was totally broken
(it assumed 4KB pages) so I changed it so it would nominally work
correctly with other page sizes.
Tag modules with the page size so you can't load a module built with
a conflicting page size. (And add a test for SMP while we're at it.)
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
These headers are similar to the <asm> headers that describe kernel
APIs, but instead describe aspects of the actual hardware in an
OS- and application-independent manner. We need to include them in
the set of installed headers so that userspace tools (including glibc)
can build purely from the provided kernel headers.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This should have been as part of the initial hardwall submission to
LKML but was overlooked. The header provides the ioctl definitions for
manipulating the hardwall fd, so needs to be available to userspace.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This change is the core kernel support for TILEPro and TILE64 chips.
No driver support (except the console driver) is included yet.
This includes the relevant Linux headers in asm/; the low-level
low-level "Tile architecture" headers in arch/, which are
shared with the hypervisor, etc., and are build-system agnostic;
and the relevant hypervisor headers in hv/.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Reviewed-by: Paul Mundt <lethal@linux-sh.org>
Linus Torvalds