The current scheme works on static interpretation of text names, which
is wrong.

The output-device setting, for example, must be resolved via an alias
or similar to a full path name to the console device.

Paths also contain an optional set of 'options', which starts with a
colon at the end of the path.  The option area is used to specify
which of two serial ports ('a' or 'b') the path refers to when a
device node drives multiple ports.  'a' is assumed if the option
specification is missing.

This was caught by the UltraSPARC-T1 simulator.  The 'output-device'
property was set to 'ttya' and we didn't pick upon the fact that this
is an OBP alias set to '/virtual-devices/console'.  Instead we saw it
as the first serial console device, instead of the hypervisor console.

The infrastructure is now there to take advantage of this to resolve
the console correctly even in multi-head situations in fbcon too.

Thanks to Greg Onufer for the bug report.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

We try to fetch the CIF entry pointer from %o4, but that
can get clobbered by the early OBP calls.  It is saved
in %l7 already, so actually this "mov %o4, %l7" can just
be completely removed with no other changes.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NDavid S. Miller <davem@davemloft.net>

They are too strict.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use KERN_INFO, add missing newline, etc.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The "id" property in vdc-port nodes are not unique, they
are all zero.  Therefore assign ID's using the parent's
"cfg-handle" property which will be unique.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

with the recent renames, we forgot to update the matches for
devspec. This is required to keep udev working and autoload modules.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NDavid S. Miller <davem@davemloft.net>

and populate it with the common parts from PowerPC and Sparc[64].
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Acked-by: NPaul Mackerras <paulus@samba.org>
Acked-by: NDavid S. Miller <davem@davemloft.net>

This is to make the of merge easier.  Also rename of_bus_type.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Acked-by: NDavid S. Miller <davem@davemloft.net>

This moves all the common parts for the Sparc, Sparc64 and PowerPC
of_device.c files into drivers/of/device.c.

Apart from the simple move, Sparc gains of_match_node() and a call to
of_node_put in of_release_dev().  PowerPC gains better recovery if
device_create_file() fails in of_device_register().
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Acked-by: NPaul Mackerras <paulus@samba.org>
Acked-by: NDavid S. Miller <davem@davemloft.net>

This consolidates the routines of_find_node_by_path, of_find_node_by_name,
of_find_node_by_type and of_find_compatible_device.  Again, the comparison
of strings are done differently by Sparc and PowerPC and also these add
read_locks around the iterations.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Acked-by: NPaul Mackerras <paulus@samba.org>
Acked-by: NDavid S. Miller <davem@davemloft.net>

This adds a read_lock around the child/next accesses on Sparc.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Acked-by: NPaul Mackerras <paulus@samba.org>
Acked-by: NDavid S. Miller <davem@davemloft.net>

This requires creating dummy of_node_{get,put} routines for sparc and
sparc64.  It also adds a read_lock around the parent accesses.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Acked-by: NPaul Mackerras <paulus@samba.org>
Acked-by: NDavid S. Miller <davem@davemloft.net>

The only change here is that a readlock is taken while the property list
is being traversed on Sparc where it was not taken previously.

Also, Sparc uses strcasecmp to compare property names while PowerPC
uses strcmp.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Acked-by: NPaul Mackerras <paulus@samba.org>
Acked-by: NDavid S. Miller <davem@davemloft.net>

The only difference here is that Sparc uses strncmp to match compatibility
names while PowerPC uses strncasecmp.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Acked-by: NPaul Mackerras <paulus@samba.org>
Acked-by: NDavid S. Miller <davem@davemloft.net>

This creates drivers/of/base.c (depending on CONFIG_OF) and puts
the first trivially common bits from the prom.c files into it.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Acked-by: NPaul Mackerras <paulus@samba.org>
Acked-by: NDavid S. Miller <davem@davemloft.net>

per cpu data section contains two types of data.  One set which is
exclusively accessed by the local cpu and the other set which is per cpu,
but also shared by remote cpus.  In the current kernel, these two sets are
not clearely separated out.  This can potentially cause the same data
cacheline shared between the two sets of data, which will result in
unnecessary bouncing of the cacheline between cpus.

One way to fix the problem is to cacheline align the remotely accessed per
cpu data, both at the beginning and at the end.  Because of the padding at
both ends, this will likely cause some memory wastage and also the
interface to achieve this is not clean.

This patch:

Moves the remotely accessed per cpu data (which is currently marked
as ____cacheline_aligned_in_smp) into a different section, where all the data
elements are cacheline aligned. And as such, this differentiates the local
only data and remotely accessed data cleanly.
Signed-off-by: NFenghua Yu <fenghua.yu@intel.com>
Acked-by: NSuresh Siddha <suresh.b.siddha@intel.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: <linux-arch@vger.kernel.org>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Otherwise we trigger assertions on the next link-up.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Reset the handshake and per-capability state so that when the
link comes back up we'll renegotiate the DS version and then
reregister all of the services.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Create and destroy VIO devices in response to MD update events.  These
run synchronously inside of the MD update mutex so the VIO layer
doesn't need to do internal locking of any sort.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

And add dummy handlers for the VIO device layer.  These will be filled
in with real code after the vdc, vnet, and ds drivers are reworked to
have simpler dependencies on the VIO device tree.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

From: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Older binutils can't handle it.  Use SET_GL() instead,
which is explicitly for this purpose.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

If the kernel OOPSed or BUGed then it probably should be considered as
tainted.  Thus, all subsequent OOPSes and SysRq dumps will report the
tainted kernel.  This saves a lot of time explaining oddities in the
calltraces.
Signed-off-by: NPavel Emelianov <xemul@openvz.org>
Acked-by: NRandy Dunlap <randy.dunlap@oracle.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
[ Added parisc patch from Matthew Wilson  -Linus ]
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

We need to make sure the MD update occurs before we try to
process dr-cpu configure requests.  MD update and dr-cpu
were being processed by seperate threads so that did not
happen occaisionally.

Fix this by executing all domain services data packets from
a single thread, in order.

This will help simplify some other things as well.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The UP build fix had some unintended consequences.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When cpu_up() fails, we can discern the most likely cause.

If cpu_present() is false, this means the cpu did not appear
in the MD.  If -ENODEV is the error return value, then
the processor did not boot properly into the kernel.

Pass this information back in the dr-cpu response packet.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When we hot-plug in new cpus, the core_id and proc_id of existing
cpus can change.  So in order to set the cpu groups correctly we
need to clear the maps out completely first.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NDavid S. Miller <davem@davemloft.net>

dr-cpu unconfigure requests will walk throught he enabled
IRQs and trigger ->set_affinity so that the going-down
cpu no longer has INOs targetted to it.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This will be necessary to handle unconfigure requests
properly.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Take a page from the powerpc folks and just calculate the
delay factor directly.

Since frequency scaling chips use a system-tick register,
the value is going to be the same system-wide.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

With the move of ldom_startcpu_cpuid() into smp.c some other
things need to follow along:

1) smp.c is not a driver so we can't use "PFX" macro in the
   printk calls.

2) smp.c now needs asm/io.h and asm/hvtramp.h, ds.c no longer
   does

3) kimage_addr_to_ra() also needs to move into smp.c

While we're here, update copyright info and my email address
in smp.c
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Do not select HOTPLUG_CPU from SUN_LDOMS, that causes
HOTPLUG_CPU to be selected even on non-SMP which is
illegal.

Only build hvtramp.o when SMP, just like trampoline.o

Protect dr-cpu code in ds.c with HOTPLUG_CPU.

Likewise move ldom_startcpu_cpuid() to smp.c and protect
it and the call site with SUN_LDOMS && HOTPLUG_CPU.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>