linux.git/arch/powerpc/platforms, branch v3.13.6

powerpc/powernv: Fix indirect XSCOM unmangling

2014-03-07T06:06:21+00:00

commit e0cf957614976896111e676e5134ac98ee227d3d upstream.

We need to unmangle the full address, not just the register
number, and we also need to support the real indirect bit
being set for in-kernel uses.

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

powerpc/le: Ensure that the 'stop-self' RTAS token is handled correctly

2014-03-07T06:06:21+00:00

commit 41dd03a94c7d408d2ef32530545097f7d1befe5c upstream.

Currently we're storing a host endian RTAS token in
rtas_stop_self_args.token.  We then pass that directly to rtas.  This is
fine on big endian however on little endian the token is not what we
expect.

This will typically result in hitting:
	panic("Alas, I survived.\n");

To fix this we always use the stop-self token in host order and always
convert it to be32 before passing this to rtas.

Signed-off-by: Tony Breeds 
Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Greg Kroah-Hartman

powerpc/powernv: Rework EEH reset

2014-03-07T06:06:09+00:00

commit 5b2e198e50f6ba57081586b853163ea1bb95f1a8 upstream.

When doing reset in order to recover the affected PE, we issue
hot reset on PE primary bus if it's not root bus. Otherwise, we
issue hot or fundamental reset on root port or PHB accordingly.
For the later case, we didn't cover the situation where PE only
includes root port and it potentially causes kernel crash upon
EEH error to the PE.

The patch reworks the logic of EEH reset to improve the code
readability and also avoid the kernel crash.

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

powernv/eeh: Add buffer for P7IOC hub error data

2013-12-30T03:02:32+00:00

Prevent ioda_eeh_hub_diag() from clobbering itself when called by supplying
a per-PHB buffer for P7IOC hub diagnostic data.  Take care to inform OPAL of
the correct size for the buffer.

[Small style change to the use of sizeof -- BenH]

Signed-off-by: Brian W Hart 
Acked-by: Gavin Shan 
Signed-off-by: Benjamin Herrenschmidt

powernv/eeh: Fix possible buffer overrun in ioda_eeh_phb_diag()

2013-12-30T03:02:31+00:00

PHB diagnostic buffer may be smaller than PAGE_SIZE, especially when
PAGE_SIZE > 4KB.

Signed-off-by: Brian W Hart 
Acked-by: Gavin Shan 
Signed-off-by: Benjamin Herrenschmidt

powerpc/powernv: Fix OPAL LPC access in Little Endian

2013-12-13T04:55:15+00:00

We are passing pointers to the firmware for reads, we need to properly
convert the result as OPAL is always BE.

Signed-off-by: Benjamin Herrenschmidt

powerpc/powernv: Fix endian issue in opal_xscom_read

2013-12-13T04:53:59+00:00

opal_xscom_read uses a pointer to return the data so we need
to byteswap it on LE builds.

Signed-off-by: Anton Blanchard 
Signed-off-by: Benjamin Herrenschmidt

powerpc/pseries: Fix endian issues in MSI code

2013-12-13T04:48:38+00:00

The MSI code is miscalculating quotas in little endian mode.
Add required byteswaps to fix this.

Before we claimed a quota of 65536, after the patch we
see the correct value of 256.

Signed-off-by: Anton Blanchard 
Signed-off-by: Benjamin Herrenschmidt

powerpc/pseries: Fix PCIE link speed endian issue

2013-12-13T04:48:37+00:00

We need to byteswap ibm,pcie-link-speed-stats.

Signed-off-by: Anton Blanchard 
Signed-off-by: Benjamin Herrenschmidt

powerpc/pseries: Fix endian issues in nvram code

2013-12-13T04:48:36+00:00

The NVRAM code has a number of endian issues. I noticed a very
confused error log count:

RTAS: 100663330 -------- RTAS event begin --------

100663330 == 0x06000022. 0x6 LE error logs and 0x22 BE error logs.

The pstore code has similar issues - if we write an oops in one
endian and attempt to read it in another we get junk.

Make both of these formats big endian, and byteswap as required.

Signed-off-by: Anton Blanchard 
Signed-off-by: Benjamin Herrenschmidt