microblaze: mb: remove use of seq_printf return value

The seq_printf return value, because it's frequently misused,
will eventually be converted to void.

See: commit 1f33c41c03da ("seq_file: Rename seq_overflow() to
seq_has_overflowed() and make public")

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Michal Simek <monstr@monstr.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

microblaze: Standardise cpuinfo output for cache policy

The current cpuinfo output for the cache policy has no leading tag:, making
it difficult to parse. Add a leaning "Dcache-policy:" tag to this field.

Signed-off-by: John A. Williams <john.williams@petalogix.com>

microblaze: Unprivileged stream instruction awareness

Add cpuinfo support for the new MicroBlaze option permitting userspace
(unprivileged) access to the streaming instructions (FSL / AXI-stream).

Emit a noisy warning at bootup if this is enabled, because bad user code
can potentially lockup the CPU.

Signed-off-by: John A. Williams <john.williams@petalogix.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>

microblaze: Add PVR for endians plus detection

Upcomming microblaze version will support little-endian.

Signed-off-by: Michal Simek <monstr@monstr.eu>
Acked-by: Grant Likely <grant.likely@secretlab.ca>

microblaze: Allow PAGE_SIZE configuration

Allow developer to configure memory page size at compile time.
Larger pages can improve performance on some workloads.

Based on PowerPC code.

Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>

microblaze: cpuinfo shows cache line length

Show cache line length in /proc/cpuinfo.

Signed-off-by: Michal Simek <monstr@monstr.eu>

microblaze: Extend cpuinfo for support write-back caches

There is missing checking agains PVR but this is not important
for now. There are some missing checking too.

Signed-off-by: Michal Simek <monstr@monstr.eu>

microblaze: Fix USR1/2 pvr printing message

Signed-off-by: Michal Simek <monstr@monstr.eu>

microblaze_v8: PVR support, cpuinfo support

Reviewed-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
Acked-by: John Linn <john.linn@xilinx.com>
Acked-by: John Williams <john.williams@petalogix.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>