linux-kernel - [PATCH v7 0/7] powerpc: switch VDSO to C implementation

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Message-Id: <cover.1587401492.git.christophe.leroy@c-s.fr>
Date:   Mon, 20 Apr 2020 16:56:27 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>, nathanl@...ux.ibm.com
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        arnd@...db.de, tglx@...utronix.de, vincenzo.frascino@....com,
        luto@...nel.org
Subject: [PATCH v7 0/7] powerpc: switch VDSO to C implementation

This is the seventh version of a series to switch powerpc VDSO to
generic C implementation.

Main changes since v6 are:
- Added -fasynchronous-unwind-tables in CFLAGS
- Split patch 2 in two parts
- Split patch 5 (which was patch 4) in two parts

This series applies on today's powerpc/merge branch.

See the last two patches for details on changes and performance.

Christophe Leroy (7):
  powerpc/vdso64: Switch from __get_datapage() to get_datapage inline
    macro
  powerpc/vdso: Remove __kernel_datapage_offset and simplify
    __get_datapage()
  powerpc/vdso: Remove unused \tmp param in __get_datapage()
  powerpc/processor: Move cpu_relax() into asm/vdso/processor.h
  powerpc/vdso: Prepare for switching VDSO to generic C implementation.
  powerpc/vdso: Switch VDSO to generic C implementation.
  [NOT TO BE MERGED] Export sysrq_mask

 arch/powerpc/Kconfig                         |   2 +
 arch/powerpc/include/asm/clocksource.h       |   7 +
 arch/powerpc/include/asm/processor.h         |  10 +-
 arch/powerpc/include/asm/vdso/clocksource.h  |   7 +
 arch/powerpc/include/asm/vdso/gettimeofday.h | 175 +++++++++++
 arch/powerpc/include/asm/vdso/processor.h    |  23 ++
 arch/powerpc/include/asm/vdso/vsyscall.h     |  25 ++
 arch/powerpc/include/asm/vdso_datapage.h     |  50 ++--
 arch/powerpc/kernel/asm-offsets.c            |  49 +---
 arch/powerpc/kernel/time.c                   |  91 +-----
 arch/powerpc/kernel/vdso.c                   |  58 +---
 arch/powerpc/kernel/vdso32/Makefile          |  32 +-
 arch/powerpc/kernel/vdso32/cacheflush.S      |   2 +-
 arch/powerpc/kernel/vdso32/config-fake32.h   |  34 +++
 arch/powerpc/kernel/vdso32/datapage.S        |   7 +-
 arch/powerpc/kernel/vdso32/gettimeofday.S    | 291 +------------------
 arch/powerpc/kernel/vdso32/vdso32.lds.S      |   7 +-
 arch/powerpc/kernel/vdso32/vgettimeofday.c   |  29 ++
 arch/powerpc/kernel/vdso64/Makefile          |  23 +-
 arch/powerpc/kernel/vdso64/cacheflush.S      |   9 +-
 arch/powerpc/kernel/vdso64/datapage.S        |  31 +-
 arch/powerpc/kernel/vdso64/gettimeofday.S    | 243 +---------------
 arch/powerpc/kernel/vdso64/vdso64.lds.S      |   7 +-
 arch/powerpc/kernel/vdso64/vgettimeofday.c   |  29 ++
 drivers/tty/sysrq.c                          |   1 +
 25 files changed, 444 insertions(+), 798 deletions(-)
 create mode 100644 arch/powerpc/include/asm/clocksource.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/config-fake32.h
 create mode 100644 arch/powerpc/kernel/vdso32/vgettimeofday.c
 create mode 100644 arch/powerpc/kernel/vdso64/vgettimeofday.c

-- 
2.25.0