04 Dec, 2011
2 commits
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We provided very similar routines internally, but now we can hook
into the generic framework by supplying our routines as function
pointers in the irq_chip structure instead.Signed-off-by: Chris Metcalf
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The empty_zero_page[] export is required for ZERO_PAGE() module references.
The #includes are due to changes in implicit inclusion, and should of
course have been in the sources from the beginning.Signed-off-by: Chris Metcalf
04 Nov, 2011
1 commit
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The kernel code was using some headers that included a mix
of hardware-specific information (typically found in Tilera
headers) and structures, enums, and function declarations supporting
the disassembly function of the tile-desc.c sources.This change refactors that code so that a hardware-specific, but
OS- and application-agnostic header, is created: .
This header is then exported to userspace along with the other
headers and can be used to build userspace code; in particular,
it is used by glibc as part of implementing the backtrace() function.The new header, together with a header that specifically describes
the disassembly code ( with _32 and _64 variants),
replaces the old and
headers.As part of this change, we are also renaming the 32-bit constants
from TILE_xxx to TILEPRO_xxx to better reflect the fact that they
are specific to the TILEPro architecture, and not to TILE-Gx
and any successor "tile" architecture chips.Signed-off-by: Chris Metcalf
13 Oct, 2011
1 commit
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The 32-bit TILEPro support uses some #defines in
for atomic support routines in assembly. To make this more explicit,
I've turned those includes into includes of , which
should hopefully make it clear that they shouldn't be bombed into
in any cleanups.Signed-off-by: Chris Metcalf
03 Aug, 2011
1 commit
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* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
arch/tile/mm/init.c: trivial: use BUG_ON
arch/tile: remove useless set_fixmap_nocache() macro
arch/tile: add hypervisor-based character driver for SPI flash ROM
ioctl-number.txt: add the tile hardwall ioctl range
tile: use generic-y format for one-line asm-generic headers
clocksource: tile: convert to use clocksource_register_hz
30 Jul, 2011
1 commit
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* 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
PCI: remove printks about disabled bridge windows
PCI: fold pci_calc_resource_flags() into decode_bar()
PCI: treat mem BAR type "11" (reserved) as 32-bit, not 64-bit, BAR
PCI: correct pcie_set_readrq write size
PCI: pciehp: change wait time for valid configuration access
x86/PCI: Preserve existing pci=bfsort whitelist for Dell systems
PCI: ARI is a PCIe v2 feature
x86/PCI: quirks: Use pci_dev->revision
PCI: Make the struct pci_dev * argument of pci_fixup_irqs const.
PCI hotplug: cpqphp: use pci_dev->vendor
PCI hotplug: cpqphp: use pci_dev->subsystem_{vendor|device}
x86/PCI: config space accessor functions should not ignore the segment argument
PCI: Assign values to 'pci_obff_signal_type' enumeration constants
x86/PCI: reduce severity of host bridge window conflict warnings
PCI: enumerate the PCI device only removed out PCI hieratchy of OS when re-scanning PCI
PCI: PCIe AER: add aer_recover_queue
x86/PCI: select direct access mode for mmconfig option
PCI hotplug: Rename is_ejectable which also exists in dock.c
27 Jul, 2011
1 commit
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This allows us to move duplicated code in
(atomic_inc_not_zero() for now) toSigned-off-by: Arun Sharma
Reviewed-by: Eric Dumazet
Cc: Ingo Molnar
Cc: David Miller
Cc: Eric Dumazet
Acked-by: Mike Frysinger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
26 Jul, 2011
1 commit
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* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (43 commits)
fs: Merge split strings
treewide: fix potentially dangerous trailing ';' in #defined values/expressions
uwb: Fix misspelling of neighbourhood in comment
net, netfilter: Remove redundant goto in ebt_ulog_packet
trivial: don't touch files that are removed in the staging tree
lib/vsprintf: replace link to Draft by final RFC number
doc: Kconfig: `to be' -> `be'
doc: Kconfig: Typo: square -> squared
doc: Konfig: Documentation/power/{pm => apm-acpi}.txt
drivers/net: static should be at beginning of declaration
drivers/media: static should be at beginning of declaration
drivers/i2c: static should be at beginning of declaration
XTENSA: static should be at beginning of declaration
SH: static should be at beginning of declaration
MIPS: static should be at beginning of declaration
ARM: static should be at beginning of declaration
rcu: treewide: Do not use rcu_read_lock_held when calling rcu_dereference_check
Update my e-mail address
PCIe ASPM: forcedly -> forcibly
gma500: push through device driver tree
...Fix up trivial conflicts:
- arch/arm/mach-ep93xx/dma-m2p.c (deleted)
- drivers/gpio/gpio-ep93xx.c (renamed and context nearby)
- drivers/net/r8169.c (just context changes)
24 Jul, 2011
1 commit
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This patch removes all the module loader hook implementations in the
architecture specific code where the functionality is the same as that
now provided by the recently added default hooks.Signed-off-by: Jonas Bonn
Acked-by: Mike Frysinger
Acked-by: Geert Uytterhoeven
Tested-by: Michal Simek
Signed-off-by: Rusty Russell
22 Jul, 2011
1 commit
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Aside of the usual motivation for constification, this function has a
history of being abused a hook for interrupt and other fixups so I turned
this function const ages ago in the MIPS code but it should be done
treewide.Due to function pointer passing in varous places a few other functions
had to be constified as well.Signed-off-by: Ralf Baechle
To: Anton Vorontsov
To: Chris Metcalf
To: Colin Cross
Acked-by: "David S. Miller"
To: Eric Miao
To: Erik Gilling
Acked-by: Guan Xuetao
To: "H. Peter Anvin"
To: Imre Kaloz
To: Ingo Molnar
To: Ivan Kokshaysky
To: Jesse Barnes
To: Krzysztof Halasa
To: Lennert Buytenhek
To: Matt Turner
To: Nicolas Pitre
To: Olof Johansson
Acked-by: Paul Mundt
To: Richard Henderson
To: Russell King
To: Thomas Gleixner
Cc: Andrew Morton
Cc: linux-alpha@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-pci@vger.kernel.org
Cc: linux-sh@vger.kernel.org
Cc: linux-tegra@vger.kernel.org
Cc: sparclinux@vger.kernel.org
Cc: x86@kernel.org
Signed-off-by: Jesse Barnes
10 Jun, 2011
1 commit
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Several fixes as well where the +1 was missing.
Done via coccinelle scripts like:
@@
struct resource *ptr;
@@- ptr->end - ptr->start + 1
+ resource_size(ptr)and some grep and typing.
Mostly uncompiled, no cross-compilers.
Signed-off-by: Joe Perches
Signed-off-by: Jiri Kosina
04 Jun, 2011
1 commit
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Convert tile to use clocksource_register_hz.
CC: Thomas Gleixner
Signed-off-by: John Stultz
Signed-off-by: Chris Metcalf
30 May, 2011
1 commit
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* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
arch/tile: more /proc and /sys file support
27 May, 2011
1 commit
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This change introduces a few of the less controversial /proc and
/proc/sys interfaces for tile, along with sysfs attributes for
various things that were originally proposed as /proc/tile files.
It also adjusts the "hardwall" proc API.Arnd Bergmann reviewed the initial arch/tile submission, which
included a complete set of all the /proc/tile and /proc/sys/tile
knobs that we had added in a somewhat ad hoc way during initial
development, and provided feedback on where most of them should go.One knob turned out to be similar enough to the existing
/proc/sys/debug/exception-trace that it was re-implemented to use
that model instead.Another knob was /proc/tile/grid, which reported the "grid" dimensions
of a tile chip (e.g. 8x8 processors = 64-core chip). Arnd suggested
looking at sysfs for that, so this change moves that information
to a pair of sysfs attributes (chip_width and chip_height) in the
/sys/devices/system/cpu directory. We also put the "chip_serial"
and "chip_revision" information from our old /proc/tile/board file
as attributes in /sys/devices/system/cpu.Other information collected via hypervisor APIs is now placed in
/sys/hypervisor. We create a /sys/hypervisor/type file (holding the
constant string "tilera") to be parallel with the Xen use of
/sys/hypervisor/type holding "xen". We create three top-level files,
"version" (the hypervisor's own version), "config_version" (the
version of the configuration file), and "hvconfig" (the contents of
the configuration file). The remaining information from our old
/proc/tile/board and /proc/tile/switch files becomes an attribute
group appearing under /sys/hypervisor/board/.Finally, after some feedback from Arnd Bergmann for the previous
version of this patch, the /proc/tile/hardwall file is split up into
two conceptual parts. First, a directory /proc/tile/hardwall/ which
contains one file per active hardwall, each file named after the
hardwall's ID and holding a cpulist that says which cpus are enclosed by
the hardwall. Second, a /proc/PID file "hardwall" that is either
empty (for non-hardwall-using processes) or contains the hardwall ID.Finally, this change pushes the /proc/sys/tile/unaligned_fixup/
directory, with knobs controlling the kernel code for handling the
fixup of unaligned exceptions.Reviewed-by: Arnd Bergmann
Signed-off-by: Chris Metcalf
26 May, 2011
1 commit
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* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: (26 commits)
arch/tile: prefer "tilepro" as the name of the 32-bit architecture
compat: include aio_abi.h for aio_context_t
arch/tile: cleanups for tilegx compat mode
arch/tile: allocate PCI IRQs later in boot
arch/tile: support signal "exception-trace" hook
arch/tile: use better definitions of xchg() and cmpxchg()
include/linux/compat.h: coding-style fixes
tile: add an RTC driver for the Tilera hypervisor
arch/tile: finish enabling support for TILE-Gx 64-bit chip
compat: fixes to allow working with tile arch
arch/tile: update defconfig file to something more useful
tile: do_hardwall_trap: do not play with task->sighand
tile: replace mm->cpu_vm_mask with mm_cpumask()
tile,mn10300: add device parameter to dma_cache_sync()
audit: support the "standard"
arch/tile: clarify flush_buffer()/finv_buffer() function names
arch/tile: kernel-related cleanups from removing static page size
arch/tile: various header improvements for building drivers
arch/tile: disable GX prefetcher during cache flush
arch/tile: tolerate disabling CONFIG_BLK_DEV_INITRD
...
25 May, 2011
1 commit
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* 'for-2.6.40' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
percpu: Unify input section names
percpu: Avoid extra NOP in percpu_cmpxchg16b_double
percpu: Cast away printk format warning
percpu: Always align percpu output section to PAGE_SIZEFix up fairly trivial conflict in arch/x86/include/asm/percpu.h as per Tejun
20 May, 2011
3 commits
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These changes make the syscall table line up correctly for
tilegx compat mode, and remove the stale sys32_fadvise64() function,
which isn't actually used by any syscall table.Signed-off-by: Chris Metcalf
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This change became required due to some recent reworking in the
platform-independent IRQ code. It is required for 2.6.38 and later.Cc: stable@kernel.org
Signed-off-by: Chris Metcalf -
This change adds support for /proc/sys/debug/exception-trace to tile.
Like x86 and sparc, by default it is set to "1", generating a one-line
printk whenever a user process crashes. By setting it to "2", we get
a much more complete userspace diagnostic at crash time, including
a user-space backtrace, register dump, and memory dump around the
address of the crash.Some vestiges of the Tilera-internal version of this support are
removed with this patch (the show_crashinfo variable and the
arch_coredump_signal function). We retain a "crashinfo" boot parameter
which allows you to set the boot-time value of exception-trace.Signed-off-by: Chris Metcalf
13 May, 2011
2 commits
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This support was partially present in the existing code (look for
"__tilegx__" ifdefs) but with this change you can build a working
kernel using the TILE-Gx toolchain and ARCH=tilegx.Most of these files are new, generally adding a foo_64.c file
where previously there was just a foo_32.c file.The ARCH=tilegx directive redirects to arch/tile, not arch/tilegx,
using the existing SRCARCH mechanism in the top-level Makefile.Changes to existing files:
- and changed to factor the
include of in the common header.- and arch/tile/kernel/compat.c changed to remove
the "const" markers I had put on compat_sys_execve() when trying
to match some recent similar changes to the non-compat execve.
It turns out the compat version wasn't "upgraded" to use const.- and were
previously included accidentally, with the 32-bit contents. Now
they have the proper 64-bit contents.Finally, I had to hack the existing hacky drivers/input/input-compat.h
to add yet another "#ifdef" for INPUT_COMPAT_TEST (same as x86_64).Signed-off-by: Chris Metcalf
Acked-by: Dmitry Torokhov [drivers/input] -
The existing mechanism doesn't really provide
enough to create the 64-bit "compat" ABI properly in a generic way,
since the compat ABI is a mix of things were you can re-use the 64-bit
versions of syscalls and things where you need a compat wrapper.To provide this in the most direct way possible, I added two new macros
to go along with the existing __SYSCALL and __SC_3264 macros: __SC_COMP
and SC_COMP_3264. These macros take an additional argument, typically a
"compat_sys_xxx" function, which is passed to __SYSCALL if you define
__SYSCALL_COMPAT when including the header, resulting in a pointer to
the compat function being placed in the generated syscall table.The change also adds some missing definitions to so that
it actually has declarations for all the compat syscalls, since the
"[nr] = ##call" approach requires proper C declarations for all the
functions included in the syscall table.Finally, compat.c defines compat_sys_sigpending() and
compat_sys_sigprocmask() even if the underlying architecture doesn't
request it, which tries to pull in undefined compat_old_sigset_t defines.
We need to guard those compat syscall definitions with appropriate
__ARCH_WANT_SYS_xxx ifdefs.Acked-by: Arnd Bergmann
Signed-off-by: Chris Metcalf
05 May, 2011
8 commits
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1. do_hardwall_trap() checks ->sighand != NULL and then takes ->siglock.
This is unsafe even if the task can't run (I assume it is pinned to
the same CPU), its parent can reap the task and set ->sighand = NULL
right after this check. Even if the compiler dosn't read ->sighand
twice and this memory can't to away __group_send_sig_info() is wrong
after that. Use do_send_sig_info().2. Send SIGILL to the thread, not to the whole process. Unless it has
the handler or blocked this kills the whole thread-group as before.
IIUC, different threads can be bound to different rect's.3. Check PF_EXITING instead of ->sighand. A zombie thread can go away
but its ->sighand can be !NULL.Reported-by: Matt Fleming
Signed-off-by: Oleg Nesterov
Signed-off-by: Chris Metcalf -
We plan to change mm->cpu_vm_mask definition later. Thus, this patch convert
it into proper macro.Signed-off-by: KOSAKI Motohiro
Signed-off-by: Chris Metcalf -
Since v2.6.20 "Pass struct dev pointer to dma_cache_sync()"
(d3fa72e4556ec1f04e46a0d561d9e785ecaa173d), dma_cache_sync() takes a
struct dev pointer, but these appear to be missing from the tile and
mn10300 implementations, so add them.Signed-off-by: James Hogan
[cmetcalf@tilera.com: took only the "tile" portion as I don't maintain mn10300]
Signed-off-by: Chris Metcalf -
This change adds a number of missing headers in asm (fb.h, parport.h,
serial.h, and vga.h) using the minimal generic versions.It also adds a number of missing interfaces that showed up as build
failures when trying to build various drivers not normally included in the
"tile" distribution: ioremap_wc(), memset_io(), io{read,write}{16,32}be(),
virt_to_bus(), bus_to_virt(), irq_canonicalize(), __pte(), __pgd(),
and __pmd(). I also added a cast in virt_to_page() since not all callers
pass a pointer.I fixed to properly include a __KERNEL__ guard for the
__ARCH_WANT_STAT64 symbol, and to use __builtin_bswap32()
even for our 64-bit architecture, since the same code is produced.I added an export for get_cycles(), since it's used in some modules.
And I made properly include the __KERNEL__ guard,
even though it's not yet exported, since it likely will be soon.Signed-off-by: Chris Metcalf
-
The code accidentally was relying on this configuration option
being selected.Signed-off-by: Chris Metcalf
-
Otherwise, in principle, there could be stale I$ data present
next time the page that previously held the kernel module code was
used to run some new code.Signed-off-by: Chris Metcalf
-
This semantic was already true for atomic operations within the kernel,
and this change makes it true for the fast atomic syscalls (__NR_cmpxchg
and __NR_atomic_update) as well. Previously, user-space had to use
the fast atomic syscalls exclusively to update memory, since raw stores
could lose a race with the atomic update code even when the atomic update
hadn't actually modified the value.With this change, we no longer write back the value to memory if it
hasn't changed. This allows certain types of idioms in user space to
work as expected, e.g. "atomic exchange" to acquire a spinlock, followed
by a raw store of zero to release the lock.Signed-off-by: Chris Metcalf
-
Note that this is not complete hot-plug support; hot-unplug is not included.
Signed-off-by: Chris Metcalf
03 May, 2011
2 commits
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This support is required for CONFIG_KEYS, NFSv4 kernel DNS, etc.
The change is slightly more complex than the minimal thing, since
I took advantage of having to go into the assembly code to just
move a bunch of stuff into C code: specifically, the schedule(),
do_async_page_fault(), do_signal(), and single_step_once() support,
in addition to the TIF_NOTIFY_RESUME support.Signed-off-by: Chris Metcalf
-
This change is the result of some work to make the backtrace code more
shareable between kernel, libc, and gdb.For the kernel, some good effects are to eliminate the hacky
"VirtualAddress" typedef in favor of "unsigned long", to eliminate a
bunch of spurious kernel doc comments, to remove the dead "bt_read_memory"
function, and to use "__tilegx__" in #ifdefs instead of "TILE_CHIP".Signed-off-by: Chris Metcalf
14 Apr, 2011
1 commit
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For future rework of try_to_wake_up() we'd like to push part of that
function onto the CPU the task is actually going to run on.In order to do so we need a generic callback from the existing scheduler IPI.
This patch introduces such a generic callback: scheduler_ipi() and
implements it as a NOP.BenH notes: PowerPC might use this IPI on offline CPUs under rare conditions!
Acked-by: Russell King
Acked-by: Martin Schwidefsky
Acked-by: Chris Metcalf
Acked-by: Jesper Nilsson
Acked-by: Benjamin Herrenschmidt
Signed-off-by: Ralf Baechle
Reviewed-by: Frank Rowand
Cc: Mike Galbraith
Cc: Nick Piggin
Cc: Linus Torvalds
Cc: Andrew Morton
Signed-off-by: Ingo Molnar
Signed-off-by: Peter Zijlstra
Link: http://lkml.kernel.org/r/20110405152728.744338123@chello.nl
31 Mar, 2011
1 commit
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Fixes generated by 'codespell' and manually reviewed.
Signed-off-by: Lucas De Marchi
26 Mar, 2011
2 commits
-
Signed-off-by: Thomas Gleixner
Acked-by: Chris Metcalf
LKML-Reference: -
Converted with coccinelle.
Signed-off-by: Thomas Gleixner
Acked-by: Chris Metcalf
LKML-Reference:
25 Mar, 2011
1 commit
-
Percpu allocator honors alignment request upto PAGE_SIZE and both the
percpu addresses in the percpu address space and the translated kernel
addresses should be aligned accordingly. The calculation of the
former depends on the alignment of percpu output section in the kernel
image.The linker script macros PERCPU_VADDR() and PERCPU() are used to
define this output section and the latter takes @align parameter.
Several architectures are using @align smaller than PAGE_SIZE breaking
percpu memory alignment.This patch removes @align parameter from PERCPU(), renames it to
PERCPU_SECTION() and makes it always align to PAGE_SIZE. While at it,
add PCPU_SETUP_BUG_ON() checks such that alignment problems are
reliably detected and remove percpu alignment comment recently added
in workqueue.c as the condition would trigger BUG way before reaching
there.For um, this patch raises the alignment of percpu area. As the area
is in .init, there shouldn't be any noticeable difference.This problem was discovered by David Howells while debugging boot
failure on mn10300.Signed-off-by: Tejun Heo
Acked-by: Mike Frysinger
Cc: uclinux-dist-devel@blackfin.uclinux.org
Cc: David Howells
Cc: Jeff Dike
Cc: user-mode-linux-devel@lists.sourceforge.net
23 Mar, 2011
1 commit
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Add a node parameter to alloc_thread_info(), and change its name to
alloc_thread_info_node()This change is needed to allow NUMA aware kthread_create_on_cpu()
Signed-off-by: Eric Dumazet
Acked-by: David S. Miller
Reviewed-by: Andi Kleen
Acked-by: Rusty Russell
Cc: Tejun Heo
Cc: Tony Luck
Cc: Fenghua Yu
Cc: David Howells
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
18 Mar, 2011
2 commits
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* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: (27 commits)
arch/tile: support newer binutils assembler shift semantics
arch/tile: fix deadlock bugs in rwlock implementation
drivers/edac: provide support for tile architecture
tile on-chip network driver: sync up with latest fixes
arch/tile: support 4KB page size as well as 64KB
arch/tile: add some more VMSPLIT options and use consistent naming
arch/tile: fix some comments and whitespace
arch/tile: export some additional module symbols
arch/tile: enhance existing finv_buffer_remote() routine
arch/tile: fix two bugs in the backtracer code
arch/tile: use extended assembly to inline __mb_incoherent()
arch/tile: use a cleaner technique to enable interrupt for cpu_idle()
arch/tile: sync up with and changes
arch/tile: fix reversed test of strict_strtol() return value
arch/tile: avoid a simulator warning during bootup
arch/tile: export to userspace
arch/tile: warn and retry if an IPI is not accepted by the target cpu
arch/tile: stop disabling INTCTRL_1 interrupts during hypervisor downcalls
arch/tile: fix __ndelay etc to work better
arch/tile: bug fix: exec'ed task thought it was still single-stepping
...Fix up trivial conflict in arch/tile/kernel/vmlinux.lds.S (percpu
alignment vs section naming convention fix) -
This change supports building the kernel with newer binutils where
a shift of greater than the word size is no longer interpreted
silently as modulo the word size, but instead generates a warning.Signed-off-by: Chris Metcalf
11 Mar, 2011
1 commit
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The Tilera architecture traditionally supports 64KB page sizes
to improve TLB utilization and improve performance when the
hardware is being used primarily to run a single application.For more generic server scenarios, it can be beneficial to run
with 4KB page sizes, so this commit allows that to be specified
(by modifying the arch/tile/include/hv/pagesize.h header).As part of this change, we also re-worked the PTE management
slightly so that PTE writes all go through a __set_pte() function
where we can do some additional validation. The set_pte_order()
function was eliminated since the "order" argument wasn't being used.One bug uncovered was in the PCI DMA code, which wasn't properly
flushing the specified range. This was benign with 64KB pages,
but with 4KB pages we were getting some larger flushes wrong.The per-cpu memory reservation code also needed updating to
conform with the newer percpu stuff; before it always chose 64KB,
and that was always correct, but with 4KB granularity we now have
to pay closer attention and reserve the amount of memory that will
be requested when the percpu code starts allocating.Signed-off-by: Chris Metcalf