linux-toradex.git/arch/powerpc/kernel/align.c, branch v3.3.5

powerpc: Remove fpscr use from [kvm_]cvt_{fd,df}

2010-09-02T04:07:32+00:00

Neither lfs nor stfs touch the fpscr, so remove the restore/save of it
around them.

Signed-off-by: Andreas Schwab 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Handle VSX alignment faults correctly in little-endian mode

2009-12-18T03:55:43+00:00

This patch fixes the handling of VSX alignment faults in little-endian
mode (the current code assumes the processor is in big-endian mode).

The patch also makes the handlers clear the top 8 bytes of the register
when handling an 8 byte VSX load.

This is based on 2.6.32.

Signed-off-by: Neil Campbell 
Cc: 
Acked-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Create PPC_WARN_ALIGNMENT to match PPC_WARN_EMULATED

2009-10-28T05:13:03+00:00

perf_event wants a separate event for alignment and emulation faults,
so create another emulation event.  This will make it easy to hook in
perf_event at one spot.

We pass in regs which will be required for these events.

Signed-off-by: Anton Blanchard 
Signed-off-by: Paul Mackerras

powerpc: Keep track of emulated instructions

2009-05-21T05:44:26+00:00

If CONFIG_PPC_EMULATED_STATS is enabled, make available counters for the
various classes of emulated instructions under
/sys/kernel/debug/powerpc/emulated_instructions/ (assumed debugfs is mounted on
/sys/kernel/debug).  Optionally (controlled by
/sys/kernel/debug/powerpc/emulated_instructions/do_warn), rate-limited warnings
can be printed to the console when instructions are emulated.

Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Fix load/store float double alignment handler

2009-02-23T04:53:05+00:00

When we introduced VSX, we changed the way FPRs are stored in the
thread_struct.  Unfortunately we missed the load/store float double
alignment handler code when updating how we access FPRs in the
thread_struct.

Below fixes this and merges the little/big endian case.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Add alignment handler for new lfiwzx instruction

2009-02-23T04:53:04+00:00

lfiwzx is a new floating point load instruction in 2.06 that needs an
alignment handler for Linux.

Turns out to be the worlds easiest handler to add.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc/vsx: Fix VSX alignment handler for regs 32-63

2009-02-13T05:37:45+00:00

Fix the VSX alignment handler for VSX registers > 32.  32-63 are stored
in the VMX part of the thread_struct not the FPR part.

Signed-off-by: Michael Neuling 
CC: stable@kernel.org (2.6.27 & .28 please)
Signed-off-by: Benjamin Herrenschmidt

powerpc: Fix uninitialised variable in VSX alignment code

2008-09-03T10:53:14+00:00

This fixes an uninitialised variable in the VSX alignment code.  It can
cause warnings from GCC (noticed with gcc-4.1.1).  Gcc is actually
correct in this instance, and this bug could cause the alignment
interrupt handler to send a SIGSEGV to the process on a legitimate
access.

Signed-off-by: Michael Neuling 
Signed-off-by: Paul Mackerras

powerpc: Add VSX load/store alignment exception handler

2008-07-15T02:29:25+00:00

VSX loads and stores will take an alignment exception when the address
is not on a 4 byte boundary.

This add support for these alignment exceptions and will emulate the
requested load or store.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc: remove unused variable in emulate_fp_pair

2008-07-09T06:30:47+00:00

regs is not used in emulate_fp_pair so remove it.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt