This is a series to switch powerpc VDSO to generic C implementation.
Changes in v13:
- Reorganised headers to avoid the need for a fake 32 bits config for building VDSO32 on PPC64
- Rebased after the removal of powerpc 601
- Using DOTSYM() macro to call functions directly without using OPD
- Explicitely dropped .opd and .got1 sections which are now unused
Changes in v12:
- Rebased to today's powerpc/merge branch (Conflicts on VDSO Makefiles)
- Added missing prototype for __kernel_clock_gettime64()
Changes in v11:
- Rebased to today's powerpc/merge branch
- Prototype of __arch_get_hw_counter() was modified in mainline (patch 2)
Changes in v10 are:
- Added a comment explaining the reason for the double stack frame
- Moved back .cfi_register lr next to mflr
Main changes in v9 are:
- Dropped the patches which put the VDSO datapage in front of VDSO text in the mapping
- Adds a second stack frame because the caller doesn't set one, at least on PPC64
- Saving the TOC pointer on PPC64 (is that really needed ?)
This series applies on today's powerpc/merge branch.
See the last patches for details on changes and performance.
Christophe Leroy (8):
powerpc/feature: Fix CPU_FTRS_ALWAYS by removing CPU_FTRS_GENERIC_32
powerpc/feature: Use CONFIG_PPC64 instead of __powerpc64__ to define
possible features
powerpc/processor: Move cpu_relax() into asm/vdso/processor.h
powerpc/time: Move timebase functions into new asm/timebase.h
powerpc/vdso: Prepare for switching VDSO to generic C implementation.
powerpc/vdso: Save and restore TOC pointer on PPC64
powerpc/vdso: Switch VDSO to generic C implementation.
powerpc/vdso: Provide __kernel_clock_gettime64() on vdso32
arch/powerpc/Kconfig | 2 +
arch/powerpc/include/asm/clocksource.h | 7 +
arch/powerpc/include/asm/cputable.h | 9 +-
arch/powerpc/include/asm/ppc_asm.h | 2 +
arch/powerpc/include/asm/processor.h | 13 +-
arch/powerpc/include/asm/time.h | 30 +-
arch/powerpc/include/asm/timebase.h | 42 +++
arch/powerpc/include/asm/vdso/clocksource.h | 7 +
arch/powerpc/include/asm/vdso/gettimeofday.h | 201 +++++++++++++
arch/powerpc/include/asm/vdso/processor.h | 23 ++
arch/powerpc/include/asm/vdso/vsyscall.h | 25 ++
arch/powerpc/include/asm/vdso_datapage.h | 40 +--
arch/powerpc/kernel/asm-offsets.c | 49 +--
arch/powerpc/kernel/time.c | 91 +-----
arch/powerpc/kernel/vdso.c | 5 +-
arch/powerpc/kernel/vdso32/Makefile | 26 +-
arch/powerpc/kernel/vdso32/gettimeofday.S | 300 +------------------
arch/powerpc/kernel/vdso32/vdso32.lds.S | 2 +
arch/powerpc/kernel/vdso32/vgettimeofday.c | 34 +++
arch/powerpc/kernel/vdso64/Makefile | 23 +-
arch/powerpc/kernel/vdso64/gettimeofday.S | 242 +--------------
arch/powerpc/kernel/vdso64/vdso64.lds.S | 2 +-
arch/powerpc/kernel/vdso64/vgettimeofday.c | 29 ++
23 files changed, 466 insertions(+), 738 deletions(-)
create mode 100644 arch/powerpc/include/asm/clocksource.h
create mode 100644 arch/powerpc/include/asm/timebase.h
create mode 100644 arch/powerpc/include/asm/vdso/clocksource.h
create mode 100644 arch/powerpc/include/asm/vdso/gettimeofday.h
create mode 100644 arch/powerpc/include/asm/vdso/processor.h
create mode 100644 arch/powerpc/include/asm/vdso/vsyscall.h
create mode 100644 arch/powerpc/kernel/vdso32/vgettimeofday.c
create mode 100644 arch/powerpc/kernel/vdso64/vgettimeofday.c
--
2.25.0
