linux-toradex.git/arch/powerpc/platforms, branch Rel3

powerpc/ps3: Fix lost SMP IPIs

2011-11-21T22:31:25+00:00

commit 72f3bea075287785ed32b777b6dd2636aa7002e8 upstream.

Fixes the PS3 bootup hang introduced in 3.0-rc1 by:

  commit 317f394160e9beb97d19a84c39b7e5eb3d7815a
  sched: Move the second half of ttwu() to the remote cpu

Move the PS3's LV1 EOI call lv1_end_of_interrupt_ext() from ps3_chip_eoi()
to ps3_get_irq() for IPI messages.

If lv1_send_event_locally() is called between a previous call to
lv1_send_event_locally() and the coresponding call to
lv1_end_of_interrupt_ext() the second event will not be delivered to the
target cpu.

The PS3's SMP IPIs are implemented using lv1_send_event_locally(), so if two
IPI messages of the same type are sent to the same target in a relatively
short period of time the second IPI event can become lost when
lv1_end_of_interrupt_ext() is called from ps3_chip_eoi().

Signed-off-by: Geoff Levand 
Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Greg Kroah-Hartman

powerpc/eeh: Fix /proc/ppc64/eeh creation

2011-11-11T17:37:11+00:00

commit 8feaa43494cee5e938fd5a57b9e9bf1c827e6ccd upstream.

Since commit 188917e183cf9ad0374b571006d0fc6d48a7f447, /proc/ppc64 is a
symlink to /proc/powerpc/. That means that creating /proc/ppc64/eeh will
end up with a unaccessible file, that is not listed under /proc/powerpc/
and, then, not listed under /proc/ppc64/.

Creating /proc/powerpc/eeh fixes that problem and maintain the
compatibility intended with the ppc64 symlink.

Signed-off-by: Thadeu Lima de Souza Cascardo 
Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Greg Kroah-Hartman

powerpc/pseries: Avoid spurious error during hotplug CPU add

2011-11-11T17:37:10+00:00

commit 9c740025c51a26ab00192cfc464064d4ccbfe3fc upstream.

During hotplug CPU add we get the following error:

Unexpected Error (0) returned from configure-connector

ibm,configure-connector returns 0 for configuration complete, so
catch this and avoid the error.

Signed-off-by: Anton Blanchard 
Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Greg Kroah-Hartman

powerpc: pseries: Fix kexec on machines with more than 4TB of RAM

2011-08-16T01:31:42+00:00

commit bed9a31527af8ff3dfbad62a1a42815cef4baab7 upstream.

On a box with 8TB of RAM the MMU hashtable is 64GB in size. That
means we have 4G PTEs. pSeries_lpar_hptab_clear was using a signed
int to store the index which will overflow at 2G.

Signed-off-by: Anton Blanchard 
Acked-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Greg Kroah-Hartman

powerpc/pseries: Fix kexec on recent firmware versions

2011-08-16T01:31:42+00:00

commit b1301797f30370c430244979671978fc232f4533 upstream.

Recent versions of firmware will fail to unmap the virtual processor
area if we have a dispatch trace log registered. This causes kexec
to fail.

If a trace log is registered this patch unregisters it before the
SLB shadow and virtual processor areas, fixing the problem.

The address argument is ignored by firmware on unregister so we
may as well remove it.

Signed-off-by: Anton Blanchard 
Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Greg Kroah-Hartman

powerpc/pseries/hvconsole: Fix dropped console output

2011-08-05T04:58:41+00:00

commit 51d33021425e1f905beb4208823146f2fb6517da upstream.

Return -EAGAIN when we get H_BUSY back from the hypervisor. This
makes the hvc console driver retry, avoiding dropped printks.

Signed-off-by: Anton Blanchard 
Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Greg Kroah-Hartman

powerpc/mm: Fix memory_block_size_bytes() for non-pseries

2011-07-12T01:16:45+00:00

Just compiling pseries in the kernel causes it to override
memory_block_size_bytes() regardless of what is the runtime
platform.

This cleans up the implementation of that function, fixing
a bug or two while at it, so that it's harmless (and potentially
useful) for other platforms. Without this, bugs in that code
would trigger a WARN_ON() in drivers/base/memory.c when
booting some different platforms.

If/when we have another platform supporting memory hotplug we
might want to either move that out to a generic place or
make it a ppc_md. callback.

Signed-off-by: Benjamin Herrenschmidt

powerpc/pmac: Don't register pmac PIC syscore ops when HW not present

2011-05-31T11:30:20+00:00

The Apple custom PIC only exist in some earlier machine models,
anything with an MPIC will crash on suspend if we register those
syscore ops unconditionally.

This is a regression caused by commit f5a592f7d74e ("PM / PowerPC: Use
struct syscore_ops instead of sysdevs for PM")

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Linus Torvalds

powerpc/4xx: Adding PCIe MSI support

2011-05-26T05:00:37+00:00

This patch adds MSI support for 440SPe, 460Ex, 460Sx and 405Ex.

Signed-off-by: Rupjyoti Sarmah 
Signed-off-by: Tirumala R Marri 
Acked-by: Josh Boyer 
Signed-off-by: Benjamin Herrenschmidt

powerpc/cell: Rename ipi functions to match current abstractions

2011-05-26T03:38:58+00:00

Rename functions and arguments to reflect current usage.  iic_cause_ipi
becomes iic_message_pass and iic_ipi_to_irq becomes iic_msg_to_irq,
and iic_request_ipi now takes a message (msg) instead of an ipi number.
Also mesg is renamed to msg.

Commit f1072939b6 (powerpc: Remove checks for MSG_ALL and
MSG_ALL_BUT_SELF) connected the smp_message_pass hook for cell to the
underlying iic_cause_IPI, a platform unique name.  Later 23d72bfd8f
(powerpc: Consolidate ipi message mux and demux) added a cause_ipi
hook to the smp_ops, also used in message passing, but for controllers
that can not send 4 unique messages and require multiplexing.  It is
even more confusing that the both take two arguments, but one is the
small message ordinal and the other is an opaque long data associated
with the cpu.

Since cell iic maps messages one to one to ipi irqs, rename the
function and argument to translate from ipi to message.  Also make it
clear that iic_request_ipi takes a message number as the argument
for which ipi to create and request.

No functionional change, just renames to avoid future confusion.

Signed-off-by: Milton Miller 
Signed-off-by: Benjamin Herrenschmidt