This series provides optimisation and cleanup of ftrace on powerpc.
With this series ftrace activation is about 20% faster on an 8xx.
At the end of the series come additional cleanups around ppc-opcode,
that would likely conflict with this series if posted separately.
Change since v2:
- The only change in v3 is in patch 21, to fix sparse problems reported by the
Robot.
Main changes since v1 (details in after each individual patch description):
- Added 3 patches (8, 9, 10) that convert PPC64_ELF_ABI_v{1/2} macros by
CONFIG_PPC64_ELF_ABI_V{1/2}
- Taken comments from Naveen
Christophe Leroy (25):
powerpc/ftrace: Refactor prepare_ftrace_return()
powerpc/ftrace: Remove redundant create_branch() calls
powerpc/code-patching: Inline is_offset_in_{cond}_branch_range()
powerpc/ftrace: Use is_offset_in_branch_range()
powerpc/code-patching: Inline create_branch()
powerpc/ftrace: Inline ftrace_modify_code()
powerpc/ftrace: Use patch_instruction() return directly
powerpc: Add CONFIG_PPC64_ELF_ABI_V1 and CONFIG_PPC64_ELF_ABI_V2
powerpc: Replace PPC64_ELF_ABI_v{1/2} by CONFIG_PPC64_ELF_ABI_V{1/2}
powerpc: Finalise cleanup around ABI use
powerpc/ftrace: Make __ftrace_make_{nop/call}() common to PPC32 and
PPC64
powerpc/ftrace: Don't include ftrace.o for CONFIG_FTRACE_SYSCALLS
powerpc/ftrace: Use CONFIG_FUNCTION_TRACER instead of
CONFIG_DYNAMIC_FTRACE
powerpc/ftrace: Remove ftrace_plt_tramps[]
powerpc/ftrace: Use BRANCH_SET_LINK instead of value 1
powerpc/ftrace: Use PPC_RAW_xxx() macros instead of opencoding.
powerpc/ftrace: Use size macro instead of opencoding
powerpc/ftrace: Simplify expected_nop_sequence()
powerpc/ftrace: Minimise number of #ifdefs
powerpc/inst: Add __copy_inst_from_kernel_nofault()
powerpc/ftrace: Don't use copy_from_kernel_nofault() in
module_trampoline_target()
powerpc/inst: Remove PPC_INST_BRANCH
powerpc/modules: Use PPC_LI macros instead of opencoding
powerpc/inst: Remove PPC_INST_BL
powerpc/opcodes: Remove unused PPC_INST_XXX macros
arch/powerpc/Kconfig | 2 +-
arch/powerpc/Makefile | 12 +-
arch/powerpc/boot/Makefile | 2 +
arch/powerpc/include/asm/code-patching.h | 65 +++-
arch/powerpc/include/asm/ftrace.h | 4 +-
arch/powerpc/include/asm/inst.h | 13 +-
arch/powerpc/include/asm/linkage.h | 2 +-
arch/powerpc/include/asm/module.h | 2 -
arch/powerpc/include/asm/ppc-opcode.h | 22 +-
arch/powerpc/include/asm/ppc_asm.h | 4 +-
arch/powerpc/include/asm/ptrace.h | 2 +-
arch/powerpc/include/asm/sections.h | 24 +-
arch/powerpc/include/asm/types.h | 8 -
arch/powerpc/kernel/fadump.c | 13 +-
arch/powerpc/kernel/head_64.S | 2 +-
arch/powerpc/kernel/interrupt_64.S | 2 +-
arch/powerpc/kernel/kprobes.c | 6 +-
arch/powerpc/kernel/misc_64.S | 2 +-
arch/powerpc/kernel/module.c | 4 +-
arch/powerpc/kernel/module_32.c | 38 ++-
arch/powerpc/kernel/module_64.c | 7 +-
arch/powerpc/kernel/ptrace/ptrace.c | 6 -
arch/powerpc/kernel/trace/Makefile | 5 +-
arch/powerpc/kernel/trace/ftrace.c | 375 +++++++----------------
arch/powerpc/kvm/book3s_interrupts.S | 2 +-
arch/powerpc/kvm/book3s_rmhandlers.S | 2 +-
arch/powerpc/lib/code-patching.c | 49 +--
arch/powerpc/lib/feature-fixups.c | 2 +-
arch/powerpc/net/bpf_jit.h | 4 +-
arch/powerpc/net/bpf_jit_comp.c | 2 +-
arch/powerpc/net/bpf_jit_comp64.c | 4 +-
arch/powerpc/platforms/Kconfig.cputype | 6 +
32 files changed, 271 insertions(+), 422 deletions(-)
--
2.35.1
