arch/powerpc/platforms/powermac/time.c:88: warning: 'to_rtc_time' defined but not used

This fixes the warning by making the relevant code depend on the
users.
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

prod_processor() is unused, and that's a good thing, since it does not
supply the required proc id parameter to H_PROD.
Signed-off-by: NNathan Lynch <ntl@pobox.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

This cleans up the SMT thread handling, removing some hard coded
assumptions and providing a set of helpers to convert between linux
cpu numbers, thread numbers and cores.

This implementation requires the number of threads per core to be a
power of 2 and identical on all cores in the system, but it's an
implementation detail, not an API requirement and so this limitation
can be lifted in the future if anybody ever needs it.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

This reverts commit a2b51812.

It turns out that this change caused some machines to fail to come
back up when being rebooted, and generated an error in the hypervisor
error log on some machines.  The platform architecture (PAPR) is a
little unclear on exactly when the RTAS ibm,os-term function should be
called.  Until that is clarified I'm reverting this commit.
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Ordinarily the size of a pageblock is determined at compile-time based on the
hugepage size. On PPC64, the hugepage size is determined at runtime based on
what is supported by the machine. With legacy machines such as iSeries that
do not support hugepages, HPAGE_SHIFT is 0. This results in pageblock_order
being set to -PAGE_SHIFT and a crash results shortly afterwards.

This patch adds a function to select a sensible value for pageblock order by
default when HUGETLB_PAGE_SIZE_VARIABLE is set. It checks that HPAGE_SHIFT
is a sensible value before using the hugepage size; if it is not MAX_ORDER-1
is used.

This is a fix for 2.6.24.

Credit goes to Stephen Rothwell for identifying the bug and testing candidate
patches.  Additional credit goes to Andy Whitcroft for spotting a problem
with respects to IA-64 before releasing. Additional credit to David Gibson
for testing with the libhugetlbfs test suite.
Signed-off-by: NMel Gorman <mel@csn.ul.ie>
Tested-by: NStephen Rothwell <sfr@canb.auug.org.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: NPaul Mackerras <paulus@samba.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

USB support for the 8349itx got added a while back; but the defconfig
never got updated.  This patch adds the appropriate USB config options
to the defconfigs
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
CC: Scott Wood <scottwood@freescale.com>
CC: Timur Tabi <timur@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

mmc_spi has hit the mainline, so we can start using it.
Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Now the rtc class ds1374 driver has been added, remove the old rtc
driver hookup code, add rtc node to device trees, and turn on the
new driver in the defconfigs.
Signed-off-by: NKim Phillips <kim.phillips@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

My changes to _tlbie to fix 4xx unfortunately broke 8xx build in a
couple of places.  This fixes it.

Spotted by Olof Johansson.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NVitaly Bordug <vitb@kernel.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

The interrupt map for the PCI PHB that had the ULI1575 was not correct
on the boards that have it.

* 8544 DS:
   - Fix interrupt mask
   - Be explicit about use of INTA for on chip peripherals

* 8572 DS/8641 HPCN:
   - Fix interrupt mask
   - Expand interrupt map for PCI slots to cover all functions
   - Be explicit about use of INTA for on chip peripherals
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

If we get no user time and no system time allocated since the last
account_system_vtime, the system to user time ratio estimate can end
up dividing by zero.

This was causing a problem noticed by Balbir Singh.
Signed-off-by: NMichael Neuling <mikey@neuling.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

We can currently cause an oops by repeatedly creating and destroying
contexts, while doing getdents() calls on the "/spu" directory.

This is due to the context's top-level dentry remaining hashed while
the context is being destroyed.

Fix this by unhashing the context's dentry with the
dentry->d_inode->i_mutex held. This way, we'll hit the check for
d_unhashed in dentry_readdir, and won't be included in the
list of subdirs for /spu.

test: spufs-testsuite:tests/01-spu_create/07-destroy-vs-readdir-race
Signed-off-by: NJeremy Kerr <jk@ozlabs.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

The rtas_os_term() routine was being called at the wrong time.
The actual rtas call "os-term" will not ever return, and so
calling it from the panic notifier is too early.  Instead,
call it from the machine_reset() call.

This splits the rtas_os_term() routine into two: one part to capture
the kernel panic message, invoked during the panic notifier, and
another part that is invoked during machine_reset().

Prior to this patch, the os-term call was never being made,
because panic_timeout was always non-zero.  Calling os-term
helps keep the hypervisor happy!  We have to keep the hypervisor
happy to avoid service, dump and error reporting problems.
Signed-off-by: NLinas Vepstas <linas@austin.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

If on a rev. 2.1, adjust UCC clock and data timing characteristics
as specified in the rev.2.1 erratum #2.
Signed-off-by: NKim Phillips <kim.phillips@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

correct the reg property, remove duplicate io port entry, whitespace fixes.

Thanks to Peter Van Ackeren for pointing this out.
Signed-off-by: NKim Phillips <kim.phillips@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

currently the board-level PHY reset code for the mpc832x MDS messes with
reset configuration words source settings which is plain wrong (it
looks like this board code was cut-n-pasted from the mpc8360 mds code,
which has the PHY reset bits in a different BCSR); this patch points
the PHY reset code to the proper mpc832x mds PHY reset bits in the BCSR.
Signed-off-by: NPeter Van Ackeren <peter.vanackeren@freescale.com>
Signed-off-by: NKim Phillips <kim.phillips@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

This patch does fix potential NULL pointer dereference that could take
place inside of strcmp() if of_get_property() call failed.
Signed-off-by: NCyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

The current VDSO implementation is hardcoded to 128 byte cache blocks,
which are only used on IBM's 64-bit processors.

Convert it to get the cache block sizes out of vdso_data instead,
similar to how the ppc64 in-kernel cache flush does it.
Signed-off-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Due to an erratum, we don't want to reset the mpic at boot time. It can
sometimes cause problems with lost interrupts later on while running.
Signed-off-by: NOlof Johansson <olof@lixom.net>

Include <asm/iseries/hv_call.h> in arch/powerpc/mm/stab.c to fix the
following compile error (found with randconfig):

  CC      arch/powerpc/mm/stab.o
arch/powerpc/mm/stab.c: In function "stab_initialize":
arch/powerpc/mm/stab.c:282: error: implicit declaration of function "HvCall1"
arch/powerpc/mm/stab.c:282: error: "HvCallBaseSetASR" undeclared (first use in this function)
arch/powerpc/mm/stab.c:282: error: (Each undeclared identifier is reported only once
arch/powerpc/mm/stab.c:282: error: for each function it appears in.)
make[1]: *** [arch/powerpc/mm/stab.o] Error 1
make: *** [arch/powerpc/mm] Error 2
Signed-off-by: NKamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Acked-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

This adds uic_mask_ack_irq() callback to PowerPC 4xx uic code
to avoid kernel crash. It is used for edge-triggered interrupts
by handle_uic_irq().
Signed-off-by: NValentine Barshak <vbarshak@ru.mvista.com>
Acked-by: NDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: NJosh Boyer <jwboyer@linux.vnet.ibm.com>

Signed-off-by: NJon Loeliger <jdl@freescale.com>
Acked-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NJosh Boyer <jwboyer@linux.vnet.ibm.com>

Turn on the L2 cache on the prpmc2800 platform.

Signed-off-by: Mark A. Greer <mgreer@mvista.com
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Acked-by: NLinas Vepstas <linas@austin.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

There are several issues with the rtas_ibm_suspend_me code, which
enables platform-assisted suspension of an LPAR as covered in PAPR
2.2.

1.) rtas_ibm_suspend_me uses on_each_cpu() to invoke
rtas_percpu_suspend_me on all cpus via IPI:

if (on_each_cpu(rtas_percpu_suspend_me, &data, 1, 0))
...

'data' is on the calling task's stack, but rtas_ibm_suspend_me takes
no measures to ensure that all instances of rtas_percpu_suspend_me are
finished accessing 'data' before returning.  This can result in the
IPI'd cpus accessing random stack data and getting stuck in H_JOIN.

This is addressed by using an atomic count of workers and a completion
on the stack.

2.) rtas_percpu_suspend_me is needlessly calling H_JOIN in a loop.
The only event that can cause a cpu to return from H_JOIN is an H_PROD
from another cpu or a NMI/system reset.  Each cpu need call H_JOIN
only once per suspend operation.

Remove the loop and the now unnecessary 'waiting' state variable.

3.) H_JOIN must be called with MSR[EE] off, but lazy interrupt
disabling may cause the caller of rtas_ibm_suspend_me to call H_JOIN
with it on; the local_irq_disable() in on_each_cpu() is not
sufficient.

Fix this by explicitly saving the MSR and clearing the EE bit before
calling H_JOIN.

4.) H_PROD is being called with the Linux logical cpu number as the
parameter, not the platform interrupt server value.  (It's also being
called for all possible cpus, which is harmless, but unnecessary.)

This is fixed by calling H_PROD for each online cpu using
get_hard_smp_processor_id(cpu) for the argument.
Signed-off-by: NNathan Lynch <ntl@pobox.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

vmemmap_populate will printk (with KERN_WARNING) for a lot of pages
if CONFIG_SPARSEMEM_VMEMMAP is enabled (at least it does on iSeries).
Use pr_debug for it instead.

Replace the only other use of DBG in this file with pr_debug as well.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Acked-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

The early btext debug wouldn't work on PowerMac when booted from BootX
due to the code looking for the wrong property name.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

These don't need to be seen by everyone on every boot.
Signed-off-by: NTony Breeds <tony@bakeyournoodle.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

The patch "KVM: fix !SMP build error" change the way smp_call_function()
actually uses the passed in function names on non-SMP builds.  So
previously it was never caught that the function passed in was never
actually defined.

This causes a build error on ppc64_defconfig + CONFIG_SMP=n:

arch/powerpc/mm/tlb_64.c: In function 'pgtable_free_now':
arch/powerpc/mm/tlb_64.c:71: error: 'pte_free_smp_sync' undeclared (first use in this function)
arch/powerpc/mm/tlb_64.c:71: error: (Each undeclared identifier is reported only once
arch/powerpc/mm/tlb_64.c:71: error: for each function it appears in.)

So we need to define it even if CONFIG_SMP is off. Either that or ifdef
out the smp_call_function() call, but that's ugly.
Signed-off-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

The context switch code in the kernel issues a dummy stwcx. to clear the
reservation, as recommended by the architecture.  However, some processors
can have issues if this stwcx to address A occurs while the reservation
is already held to a different address B.  To avoid this problem, the dummy
stwcx. needs to be paired with a dummy lwarx to the same address.

This adds the dummy lwarx, and creates a cpu feature bit to indicate
which cpus are affected.  Tested on mpc8641_hpcn_defconfig in
arch/powerpc; build tested in arch/ppc.
Signed-off-by: NBecky Bruce <becky.bruce@freescale.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Since powerpc started using CONFIG_GENERIC_CLOCKEVENTS, the
deterministic CPU accounting (CONFIG_VIRT_CPU_ACCOUNTING) has been
broken on powerpc, because we end up counting user time twice: once in
timer_interrupt() and once in update_process_times().

This fixes the problem by pulling the code in update_process_times
that updates utime and stime into a separate function called
account_process_tick.  If CONFIG_VIRT_CPU_ACCOUNTING is not defined,
there is a version of account_process_tick in kernel/timer.c that
simply accounts a whole tick to either utime or stime as before.  If
CONFIG_VIRT_CPU_ACCOUNTING is defined, then arch code gets to
implement account_process_tick.

This also lets us simplify the s390 code a bit; it means that the s390
timer interrupt can now call update_process_times even when
CONFIG_VIRT_CPU_ACCOUNTING is turned on, and can just implement a
suitable account_process_tick().

account_process_tick() now takes the task_struct * as an argument.
Tested both with and without CONFIG_VIRT_CPU_ACCOUNTING.
Signed-off-by: NPaul Mackerras <paulus@samba.org>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

A debugging printk is removed, and a comment is fixed to match
the code.
Signed-off-by: NScott Wood <scottwood@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Newer GCC's are capable of autovectorization for ISA extensions like
AltiVec and SPE.  If we happen to build with one of those compilers we
will get SPE instructions in random kernel code.  Today we only allow
basic interger code in the kernel and FP, AltiVec, or SPE in special
explicit locations that have handled the proper saving and restoring of
the register state (since on uniprocessor we lazy context switch the
register state for FP, AltiVec, and SPE).

-mno-spe disables the compiler for automatically generating SPE
instructions without our knowledge.
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Fix old buglet; a warning message should have been printed
when a hardware reset takes too long.
Signed-off-by: NLinas Vepstas <linas@austin.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

This makes the altivec code in swsusp_32.S depend on CONFIG_ALTIVEC to
avoid build failures for systems that don't have altivec. I'm not sure
whether the code will actually work for other systems, but it was merged
for just ppc32 rather than powermac a very long time ago.
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

If the low level MMU hash table insertion returns an error (which
can happen in some rare circumstances when the hypervisor refuses
the insertion of a PTE, typically if you try to access junk via
/dev/mem), the generated signal had an incorrect si_addr value due
to a bug in the assembly, which was loading it as a 32 bits quantity
instead of a 64 bits quantity.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Refresh ppc64_defconfig, add PPC_PASEMI and various options that the
common boards there need:

* Chip drivers (iommu, ethernet, IDE, CF, EDAC, MDIO/PHY)
* PCMCIA
* PATA_PCMCIA
* RTC_CLASS
* SATA_MV
* SATA_SIL24
* IP_PNP + NFS_ROOT for diskless booting

+ possibly some other things I might have missed to list
Signed-off-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Update pasemi_defconfig.  Add a few missing options for default devices
on electra boards, enable tickless and hrtimers, etc, etc.
Signed-off-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NPaul Mackerras <paulus@samba.org>