This problem was introduced by changeset
14778d9072
Unlike the hugetlb code paths, the normal fault code is not setup to
propagate PTE changes for large page sizes correctly like the ones we
make for I/O mappings in io_remap_pfn_range().
It is absolutely necessary to update all sub-ptes of a largepage
mapping on a fault. Adding special handling for this would add
considerably complexity to tlb_batch_add(). So let's just side-step
the issue and forcefully dirty any writable PTEs created by
io_remap_pfn_range().
The only other real option would be to disable to large PTE code of
io_remap_pfn_range() and we really don't want to do that.
Much thanks to Mikael Pettersson for tracking down this problem and
testing debug patches.
Signed-off-by: David S. Miller <davem@davemloft.net>
* master.kernel.org:/home/rmk/linux-2.6-arm:
[ARM] 3761/1: fix armv4t breakage after adding thumb interworking to userspace helpers
[ARM] Add Integrator support for glibc outb() and friends
[ARM] Move prototype for register_isa_ports to asm/io.h
[ARM] Arrange for isa.c to use named initialisers
[ARM] 3741/1: remove sa1111.c build warning on non-sa1100 systems
[ARM] 3760/1: This patch adds timeouts while working with SSP registers. Such timeouts were en
[ARM] 3758/1: Preserve signalling NaNs in conversion
[ARM] 3749/3: Correct VFP single/double conversion emulation
[ARM] 3748/3: Correct error check in vfp_raise_exceptions
Patch from Lennert Buytenhek
On armv4t systems, we have always compiled the kernel with -march=armv4
instead of -march=armv4t, which means that any use of bx will bomb out.
Commit ba9b5d7637 introduced the use of
bx in the kernel, which means we need to compile with -march=armv4t on
armv4t systems now.
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Add the necessary call to register_isa_ports() so that glibc knows
where these are found on Integrator platforms.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
When we select NUMA with i386, the system is only X86_NUMAQ or using ACPI.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Ignore the return value of early_init_acpi(), as it can give false error
messages. If there is something really wrong, then register_driver will
fail cleanly with EINVAL later.
[ background: modprobe acpi-cpufreq on systems not capable of speed-scaling
started failing with 'invalid argument', where previously it would only
ever -ENODEV
I'm not 100% happy with the solution. It'd be better to handle
failure properly, but this is a low-impact change for 2.6.18
We can always revisit doing this better in .19 --davej.]
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Dave Jones <davej@redhat.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Patch from David Brownell
Remove buld warning when building sa1111 on non-sa1100 platforms (e.g. PXA).
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Patch from Paul Sokolovsky
This patch adds timeouts while working with SSP registers. Such
timeouts were envisioned by docstrings in ssp.c, but were not
implemented. There were actual lockups while accessing
touchscreen for iPaqs h1910, h4000 due to lack of the timeouts.
This is updated version of previously submitted patch: 3738/1.
Signed-off-by: Paul Sokolovsky <pmiscml@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Patch from Daniel Jacobowitz
The fcvtds and fcvtsd instructions were generating a qnan bit pattern
for both quiet and signalling NaNs.
Signed-off-by: Daniel Jacobowitz <dan@codesourcery.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Patch from Daniel Jacobowitz
The fcvtsd/fcvtds emulation was left behind when the numbering of double
precision registers was changed from 0-30 to 0-15. Both conversion
instructions were writing their results to the wrong register. Also,
the conversion instructions should stop after the first element even
if a vector length is specified.
Signed-off-by: Daniel Jacobowitz <dan@codesourcery.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Patch from Daniel Jacobowitz
The recent fix to hide VFP_NAN_FLAG broke the check in vfp_raise_exceptions;
it would attempt to deliver an exception mask of 0xfffffeff instead of reporting
a serious error condition using printk. Define a safe constant to use for
an invalid exception maskm, and use it at both ends.
Signed-off-by: Daniel Jacobowitz <dan@codesourcery.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
It moves the smp_procesors_ready variable to sun4d_smp.c only.
Signed-off-by: Krzysztof Helt (krzysztof.h1@wp.pl)
Signed-off-by: David S. Miller <davem@davemloft.net>
smp_setup_cpu_possible_map() needs to run after paging_init()
so that the in-kernel device tree is setup.
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
On i386 PCI mmconfig forgets the bus number when setting the fallback_slots
bits which means fallback to conf1 only works for bus 0.
Signed-off-by: Daniel Ritz <daniel.ritz@gmx.ch>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
there was a change in 2.6.17 which affected the order in which the PCI
access methods are probed. this gives regressions on some machines with
broken BIOS. the problem is that PCBIOS sometimes reports last bus wrong,
leaving cardbus non-funcational. previously those system worked fine with
direct access.
The patch changes the PCI init code to have PCBIOS as last fallback, yet
the PCBIOS code still has to run first to set pcibios_last_bus to the value
reported by the BIOS. this is needed in case legacy PCI probing
(arch/i386/pci/legacy.c) is used to detect peer busses. using direct
access if available fixes the cardbus problems.
Signed-off-by: Daniel Ritz <daniel.ritz@gmx.ch>
Cc: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
On Tue, 2006-08-15 at 08:22 -0700, Dave Hansen wrote:
> kernel BUG in cache_free_debugcheck at mm/slab.c:2748!
Alright, this one is only triggered when slab debugging is enabled. The
slabs are assumed to be aligned on a HUGEPTE_TABLE_SIZE boundary. The free
path makes use of this assumption and uses the lowest nibble to pass around
an index into an array of kmem_cache pointers. With slab debugging turned
on, the slab is still aligned, but the "working" object pointer is not.
This would break the assumption above that a full nibble is available for
the PGF_CACHENUM_MASK.
The following patch reduces PGF_CACHENUM_MASK to cover only the two least
significant bits, which is enough to cover the current number of 4 pgtable
cache types. Then use this constant to mask out the appropriate part of
the huge pte pointer.
Signed-off-by: Adam Litke <agl@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Compile fails without defining CONFIG_PCI.
The patch fix this.
[paulus@samba.org: Moved of_irq_pci_swizzle so we only need one #ifdef]
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
When we get an illegal instruction exception, we check to see whether
the instruction is one that we emulate for the user program. Some of
the masks we use in checking whether the offending instruction is one
we care about didn't have the top bit set, which is the MSB of the
major opcode. Thus some undefined opcodes could get emulated as other
(defined but unimplemented) instructions. This corrects the masks.
Signed-off-by: Paul Mackerras <paulus@samba.org>
The patch passes the UPIO_TSI flag to general 8259 serial driver
Signed-off-by: Roy Zang <tie-fei.zang@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
The patch rewrites mpc7448hpc2 board irq support according to the new
mpic device tree interface.
Signed-off-by: Roy Zang <tie-fei.zang@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
The bootx_init.c trampoline didn't properly add the ramdisk to the
"reserve map" (list of reserved areas of memory), thus causing all sorts
of failures when using BootX with an initrd. Also fixes a possible
problem if the ramdisk is located before the device-tree passed by
BootX.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
There are two problems in the powerpc gettimeofday code which can
cause incorrect results to be returned.
The first is that there is a race between do_gettimeofday and the
timer interrupt:
1. do_gettimeofday does get_tb()
2. decrementer exception on boot cpu which runs timer_recalc_offset,
which also samples the timebase and updates the do_gtod structure
with a greater timebase value.
3. do_gettimeofday calls __do_gettimeofday, which leads to the
negative result from tb_val - temp_varp->tb_orig_stamp.
The second is caused by taking the boot cpu offline, which can cause
the value of tb_last_jiffy to be increased past the currently
available timebase, causing the same underflow as above.
[paulus@samba.org - define and use data_barrier() instead of mb().]
Signed-off-by: Nathan Lynch <ntl@pobox.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
IRQ setup now comes from the Flat Device Tree and use the new generic
IRQ code. Fixed the fsl_soc.c IRQ OF interrupt node parsing.
Removed some unused MPC86xx macro definition.
Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
Signed-off-by: Jon Loeliger <jdl@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
(cherry picked from 919fede6ed commit)
* Fix IRQ support in the 85xx CDS boards so it uses the new
generic stuff
* Fix PCI IRQ mapping to use the device tree
* Disabled i8259 support to allow the CDS to boot. This will be
fixed soon, but the current code doesn't even compile, so this
is a vast improvement
Signed-off-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
* Fixed 8540 ADS support for the new irq layer
* Fixed 8540 ADS support for mapping PCI interrupts
* Updated 8540 ADS to use device tree for interrupt assignment
and sense values
Signed-off-by: Paul Mackerras <paulus@samba.org>
This contains board-specific portion to respect driver changes (for 8272ads ,
885ads and 866ads). Altered platform_data structures as well as initial setup
routines relevant to fs_enet.
Changes to the mpc8560ads ppc/ code are also introduced, but mainly as
reference, since the entire board support is going to appear in arch/powerpc.
Signed-off-by: Vitaly Bordug <vbordug@ru.mvista.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
ACPI 3.0 appended a variable length UID string to the LAPIC structure
as part of support for > 256 processors. So the BAD_MADT_ENTRY() sanity
check can no longer compare for equality with a fixed structure length.
Signed-off-by: Alexey Y Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Patch from Nicolas Pitre
The userspace helpers in clean/arch/arm/kernel/entry-armv.S are called
directly in/from userspace. They need to cope with being called from
Thumb code.
Patch below uses the bx interworking instruction when
CONFIG_ARM_THUMB=y.
Based on an earlier patch from Paul Brook <paul@codesourcery.com>
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Patch from Catalin Marinas
This is instead of a magic number.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Patch from Kevin Hilman
Previous locking changes to dmabounce incorrectly return non-NULL even
when buffer not found. Fix it up.
Signed-off-by: Kevin Hilman <khilman@mvista.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Patch from Ben Dooks
tidy up the makefile by using TABs to indent, and ensure
that all items are indented the same.
Move the DMA to its own section, ready for the next set
of updates
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Patch from Ben Dooks
A number of small issues with the S3C24XX DMA have
cropped up, which this patch fixes. These are:
- check wether we can load another buff in start
- update state handling in s3c2410_dma_lastxfer
- only reload in irq if channel is not idle
- more informative timeout errors (add source)
- do not call request_irq() with irqs locked
- added waitforstop function
The patch also adds a S3C2410_DMAOP_STARTED for
the occasions when the driver wants to ensure that
the DMA system load state is resynced after loading.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
As per list discussion, let's add device tree source files
under powerpc/boot/dts. If nothing else, it is a starting point.
Signed-off-by: Jon Loeliger <jdl@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Also accept "local-mac-address". However the old "address"
is now obsolete, but accepted for backwards compatibility.
It should be removed after all device trees have been
converted to use "mac-address".
Signed-off-by: Jon Loeliger <jdl@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Clear HID0[en_attn] at CPU init time on PPC970. Closes CVE-2006-4093.
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
The code for using the radix tree for reverse mapping of interrupts has
a typo that causes it to create incorrect mappings if the software and
hardware numbers happen to be different. This would, among others, cause
the IDE interrupt to fail on js20's. This fixes it.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
- On archs that have no-exec support, we vmalloc() a executable scratch
area of PAGE_SIZE and divide it up into an array of slots of maximum
instruction size for that arch
- On a kprobe registration, the original instruction is copied to the
first available free slot, so if multiple kprobes are registered, chances
are, they get contiguous slots
- On POWER4, due to not having coherent icaches, we could hit a situation
where a probe that is registered on one processor, is hit immediately on
another. This second processor could have fetched the stream of text from
the out-of-line single-stepping area *before* the probe registration
completed, possibly due to an earlier (and a different) kprobe hit and
hence would see stale data at the slot.
Executing such an arbitrary instruction lead to a problem as reported
in LTC bugzilla 23555.
The correct solution is to call flush_icache_range() as soon as the
instruction is copied for out-of-line single-stepping, so the correct
instruction is seen on all processors.
Thanks to Will Schmidt who tracked this down.
Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Acked-by: Will Schmidt <will_schmidt@vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
To compile kexec on 32-bit we need a few more bits and pieces. Rather
than add empty definitions, we can make crash.c work on 32-bit, with
only a couple of kludges.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
