linux/arch/powerpc/kernel/align.c, branch v3.2.20

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

2010-09-02T04:07:32Z

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

2009-12-18T03:55:43Z

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

2009-10-28T05:13:03Z

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

2009-05-21T05:44:26Z

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

2009-02-23T04:53:05Z

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

2009-02-23T04:53:04Z

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

2009-02-13T05:37:45Z

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

2008-09-03T10:53:14Z

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

2008-07-15T02:29:25Z

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

2008-07-09T06:30:47Z

regs is not used in emulate_fp_pair so remove it. Signed-off-by: Michael Neuling Signed-off-by: Benjamin Herrenschmidt