Here are various improvements to our context switch path. Some of the
highlights:
- Group all mfsprs and mtsprs in __switch_to(), which gives us a
10% improvement on POWER8.
- Create giveup_all() and flush_all_to_thread() so we only write the
MSR once, which gives us a 3% improvement on POWER8.
- Create disable_kernel_{fp,altivec,vsx,spe}() and add a debug boot
option (ppc_strict_facility_enable) to minimise kernel code running
with floating point and vector bits enabled.
- Make giveup_vsx() and flush_vsx_to_thread() handle FP and Altivec
state, so they behave more like their sister functions.
Scott: There are changes to the SPE code here which I have only been
able to compile test.
Anton
--
Anton Blanchard (19):
powerpc: Don't disable kernel FP/VMX/VSX MSR bits on context switch
powerpc: Don't disable MSR bits in do_load_up_transact_*() functions
powerpc: Create context switch helpers save_sprs() and restore_sprs()
powerpc: Remove redundant mflr in _switch
powerpc: Remove UP only lazy floating point and vector optimisations
powerpc: Simplify TM restore checks
powerpc: Create mtmsrd_isync()
powerpc: Remove NULL task struct pointer checks in FP and vector code
powerpc: Move part of giveup_fpu,altivec,spe into c
powerpc: Move part of giveup_vsx into c
crypto: vmx: Only call enable_kernel_vsx()
powerpc: Create msr_check_and_{set,clear}()
powerpc: Create disable_kernel_{fp,altivec,vsx,spe}()
powerpc: Add ppc_strict_facility_enable boot option
powerpc: Remove fp_enable() and vec_enable(), use
msr_check_and_{set,clear}()
powerpc: create giveup_all()
powerpc: create flush_all_to_thread()
powerpc: Rearrange __switch_to()
powerpc: clean up asm/switch_to.h
Documentation/kernel-parameters.txt | 6 +
arch/powerpc/crypto/aes-spe-glue.c | 1 +
arch/powerpc/crypto/sha1-spe-glue.c | 1 +
arch/powerpc/crypto/sha256-spe-glue.c | 1 +
arch/powerpc/include/asm/processor.h | 9 +-
arch/powerpc/include/asm/reg.h | 17 ++
arch/powerpc/include/asm/switch_to.h | 65 ++---
arch/powerpc/kernel/align.c | 2 +
arch/powerpc/kernel/entry_64.S | 75 +----
arch/powerpc/kernel/fpu.S | 73 +----
arch/powerpc/kernel/head_fsl_booke.S | 42 +--
arch/powerpc/kernel/idle_power7.S | 7 -
arch/powerpc/kernel/ppc_ksyms.c | 6 -
arch/powerpc/kernel/process.c | 471 ++++++++++++++++++-------------
arch/powerpc/kernel/signal_32.c | 22 +-
arch/powerpc/kernel/signal_64.c | 22 +-
arch/powerpc/kernel/swsusp.c | 4 +-
arch/powerpc/kernel/vector.S | 112 +-------
arch/powerpc/kvm/book3s_hv.c | 5 +-
arch/powerpc/kvm/book3s_paired_singles.c | 1 +
arch/powerpc/kvm/book3s_pr.c | 21 +-
arch/powerpc/kvm/booke.c | 4 +
arch/powerpc/lib/vmx-helper.c | 2 +
arch/powerpc/lib/xor_vmx.c | 4 +
drivers/crypto/vmx/aes.c | 6 +-
drivers/crypto/vmx/aes_cbc.c | 6 +-
drivers/crypto/vmx/aes_ctr.c | 6 +-
drivers/crypto/vmx/ghash.c | 12 +-
lib/raid6/altivec.uc | 1 +
29 files changed, 376 insertions(+), 628 deletions(-)
--
2.5.0
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