On Mon, Jan 9, 2017 at 3:29 AM, Yury Norov <ynorov@xxxxxxxxxxxxxxxxxx> wrote: > This series enables aarch64 with ilp32 mode. > > As supporting work, it introduces ARCH_32BIT_OFF_T configuration > option that is enabled for existing 32-bit architectures but disabled > for new arches (so 64-bit off_t is is used by new userspace). Also it > deprecates getrlimit and setrlimit syscalls prior to prlimit64. > > This version is based on linux-next from 2017-01-09. It works with > glibc-2.25, and tested with LTP, glibc testsuite, trinity, lmbench, > CPUSpec. > > This is not RFC anymore. I believe that all ABI and implementation > issues are resolved now. The way that kernel clears registers top > halves is probably the last question, and because there's no objection > for current approach for more that 6 month, I think, community agrees > with it. > > Patches 1, 2, 3 and 8 are general, and may be applied separately. > > Current version does not introduce ABI changes comparing to RFC3. > Kernel and GLIBC trees: > https://github.com/norov/linux/tree/ilp32-2017-01-09 > https://github.com/norov/glibc/tree/dev9 > > (GLIBC patches are managed by Steve Ellsey, so my tree is only for > reference.) For folks concerned about performance, here is what we get for SPEC CPU 2006 on ThunderX 2 CN99xx. Positive means ILP32 is faster than LP64. This core does not have AARCH32 so I can't compare that. Also my LP64 scores don't change with and without the patches. Options: -Ofast -flto=32 -mcpu=native -fno-aggressive-loop-optimizations -funroll-loops -fprefetch-loop-arrays GCC 7.0.1 r245361 with ilp32 multi-arch patch applied. 4.10rc2 Plus ILP32 patches SPEC CPU 2006 INT ILP32/LP64 400.perlbench 5.23% 401.bzip2 7.83% 403.gcc 6.22% 429.mcf 14.25% 445.gobmk -1.33% 456.hmmer -0.61% 458.sjeng 0.00% 462.libquantum -7.38% 464.h264ref 10.86% 471.omnetpp 13.53% 473.astar 1.38% 483.xalancbmk 3.73% Score 4.29% Rate (32): 400.perlbench 6.10% 401.bzip2 7.10% 403.gcc 6.71% 429.mcf 57.29% 445.gobmk -0.87% 456.hmmer -0.19% 458.sjeng 0.22% 462.libquantum 0.00% 464.h264ref 11.19% 471.omnetpp 11.80% 473.astar -0.29% 483.xalancbmk 8.87% Score 8.12% Thanks, Andrew Pinski > > Changes: > v3: https://lkml.org/lkml/2014/9/3/704 > v4: https://lkml.org/lkml/2015/4/13/691 > v5: https://lkml.org/lkml/2015/9/29/911 > v6: https://lkml.org/lkml/2016/5/23/661 > v7: RFC nowrap: https://lkml.org/lkml/2016/6/17/990 > v7: RFC2 nowrap: https://lkml.org/lkml/2016/8/17/245 > v7: RFC3 nowrap: https://lkml.org/lkml/2016/10/21/883 > v7: - 32-bit off_t deprecation is splitted for compat > and native 32-bit arches, as it was initially > done (patches 1, 2); > - getrlimit() and setrlimit() syscalls deprecated for > aarch64/ilp32 and all new architectures; > - documentation is cleaned up (patch 4); > - compat-related definitions moved from > aarch64/include/elf.h to binfmt_elf32.c (patch 11) > - for ptrace, execution mode detection is performed > at runtime, as it was in v4 (patch 18) > > Andrew Pinski (6): > arm64: rename COMPAT to AARCH32_EL0 in Kconfig > arm64: ensure the kernel is compiled for LP64 > arm64:uapi: set __BITS_PER_LONG correctly for ILP32 and LP64 > arm64: ilp32: add sys_ilp32.c and a separate table (in entry.S) to use > it > arm64: ilp32: introduce ilp32-specific handlers for sigframe and > ucontext > arm64:ilp32: add ARM64_ILP32 to Kconfig > > Philipp Tomsich (1): > arm64:ilp32: add vdso-ilp32 and use for signal return > > Yury Norov (13): > compat ABI: use non-compat openat and open_by_handle_at variants > 32-bit ABI: introduce ARCH_32BIT_OFF_T config option > asm-generic: Drop getrlimit and setrlimit syscalls from default list > arm64: ilp32: add documentation on the ILP32 ABI for ARM64 > thread: move thread bits accessors to separated file > arm64: introduce is_a32_task and is_a32_thread (for AArch32 compat) > arm64: ilp32: add is_ilp32_compat_{task,thread} and TIF_32BIT_AARCH64 > arm64: introduce binfmt_elf32.c > arm64: ilp32: introduce binfmt_ilp32.c > arm64: ilp32: share aarch32 syscall handlers > arm64: signal: share lp64 signal routines to ilp32 > arm64: signal32: move ilp32 and aarch32 common code to separated file > arm64: ptrace: handle ptrace_request differently for aarch32 and ilp32 > > Documentation/arm64/ilp32.txt | 45 +++++++ > arch/Kconfig | 4 + > arch/arc/Kconfig | 1 + > arch/arc/include/uapi/asm/unistd.h | 1 + > arch/arm/Kconfig | 1 + > arch/arm64/Kconfig | 19 ++- > arch/arm64/Makefile | 5 + > arch/arm64/include/asm/compat.h | 19 +-- > arch/arm64/include/asm/elf.h | 32 ++--- > arch/arm64/include/asm/fpsimd.h | 2 +- > arch/arm64/include/asm/ftrace.h | 2 +- > arch/arm64/include/asm/hwcap.h | 6 +- > arch/arm64/include/asm/is_compat.h | 90 ++++++++++++++ > arch/arm64/include/asm/memory.h | 5 +- > arch/arm64/include/asm/processor.h | 11 +- > arch/arm64/include/asm/ptrace.h | 2 +- > arch/arm64/include/asm/seccomp.h | 2 +- > arch/arm64/include/asm/signal32.h | 9 +- > arch/arm64/include/asm/signal32_common.h | 27 ++++ > arch/arm64/include/asm/signal_common.h | 33 +++++ > arch/arm64/include/asm/signal_ilp32.h | 38 ++++++ > arch/arm64/include/asm/syscall.h | 2 +- > arch/arm64/include/asm/thread_info.h | 4 +- > arch/arm64/include/asm/unistd.h | 8 +- > arch/arm64/include/asm/vdso.h | 6 + > arch/arm64/include/uapi/asm/bitsperlong.h | 9 +- > arch/arm64/include/uapi/asm/unistd.h | 13 ++ > arch/arm64/kernel/Makefile | 18 ++- > arch/arm64/kernel/asm-offsets.c | 9 +- > arch/arm64/kernel/binfmt_elf32.c | 32 +++++ > arch/arm64/kernel/binfmt_ilp32.c | 98 +++++++++++++++ > arch/arm64/kernel/cpufeature.c | 8 +- > arch/arm64/kernel/cpuinfo.c | 20 +-- > arch/arm64/kernel/entry.S | 34 +++++- > arch/arm64/kernel/entry32.S | 80 ------------ > arch/arm64/kernel/entry32_common.S | 107 ++++++++++++++++ > arch/arm64/kernel/entry_ilp32.S | 22 ++++ > arch/arm64/kernel/head.S | 2 +- > arch/arm64/kernel/hw_breakpoint.c | 8 +- > arch/arm64/kernel/perf_regs.c | 2 +- > arch/arm64/kernel/process.c | 7 +- > arch/arm64/kernel/ptrace.c | 80 ++++++++++-- > arch/arm64/kernel/signal.c | 102 ++++++++++------ > arch/arm64/kernel/signal32.c | 107 ---------------- > arch/arm64/kernel/signal32_common.c | 135 ++++++++++++++++++++ > arch/arm64/kernel/signal_ilp32.c | 170 ++++++++++++++++++++++++++ > arch/arm64/kernel/sys_ilp32.c | 100 +++++++++++++++ > arch/arm64/kernel/traps.c | 5 +- > arch/arm64/kernel/vdso-ilp32/.gitignore | 2 + > arch/arm64/kernel/vdso-ilp32/Makefile | 74 +++++++++++ > arch/arm64/kernel/vdso-ilp32/vdso-ilp32.S | 33 +++++ > arch/arm64/kernel/vdso-ilp32/vdso-ilp32.lds.S | 95 ++++++++++++++ > arch/arm64/kernel/vdso.c | 70 +++++++++-- > arch/arm64/kernel/vdso/gettimeofday.S | 20 ++- > arch/arm64/kernel/vdso/vdso.S | 6 +- > arch/blackfin/Kconfig | 1 + > arch/c6x/include/uapi/asm/unistd.h | 1 + > arch/cris/Kconfig | 1 + > arch/frv/Kconfig | 1 + > arch/h8300/Kconfig | 1 + > arch/h8300/include/uapi/asm/unistd.h | 1 + > arch/hexagon/Kconfig | 1 + > arch/hexagon/include/uapi/asm/unistd.h | 1 + > arch/m32r/Kconfig | 1 + > arch/m68k/Kconfig | 1 + > arch/metag/Kconfig | 1 + > arch/metag/include/uapi/asm/unistd.h | 1 + > arch/microblaze/Kconfig | 1 + > arch/mips/Kconfig | 1 + > arch/mn10300/Kconfig | 1 + > arch/nios2/Kconfig | 1 + > arch/nios2/include/uapi/asm/unistd.h | 1 + > arch/openrisc/Kconfig | 1 + > arch/openrisc/include/uapi/asm/unistd.h | 1 + > arch/parisc/Kconfig | 1 + > arch/powerpc/Kconfig | 1 + > arch/score/Kconfig | 1 + > arch/score/include/uapi/asm/unistd.h | 1 + > arch/sh/Kconfig | 1 + > arch/sparc/Kconfig | 1 + > arch/tile/Kconfig | 1 + > arch/tile/include/uapi/asm/unistd.h | 1 + > arch/tile/kernel/compat.c | 3 + > arch/unicore32/Kconfig | 1 + > arch/unicore32/include/uapi/asm/unistd.h | 1 + > arch/x86/Kconfig | 1 + > arch/x86/um/Kconfig | 1 + > arch/xtensa/Kconfig | 1 + > drivers/clocksource/arm_arch_timer.c | 2 +- > include/linux/fcntl.h | 2 +- > include/linux/thread_bits.h | 63 ++++++++++ > include/linux/thread_info.h | 54 +------- > include/uapi/asm-generic/unistd.h | 10 +- > 93 files changed, 1600 insertions(+), 408 deletions(-) > create mode 100644 Documentation/arm64/ilp32.txt > create mode 100644 arch/arm64/include/asm/is_compat.h > create mode 100644 arch/arm64/include/asm/signal32_common.h > create mode 100644 arch/arm64/include/asm/signal_common.h > create mode 100644 arch/arm64/include/asm/signal_ilp32.h > create mode 100644 arch/arm64/kernel/binfmt_elf32.c > create mode 100644 arch/arm64/kernel/binfmt_ilp32.c > create mode 100644 arch/arm64/kernel/entry32_common.S > create mode 100644 arch/arm64/kernel/entry_ilp32.S > create mode 100644 arch/arm64/kernel/signal32_common.c > create mode 100644 arch/arm64/kernel/signal_ilp32.c > create mode 100644 arch/arm64/kernel/sys_ilp32.c > create mode 100644 arch/arm64/kernel/vdso-ilp32/.gitignore > create mode 100644 arch/arm64/kernel/vdso-ilp32/Makefile > create mode 100644 arch/arm64/kernel/vdso-ilp32/vdso-ilp32.S > create mode 100644 arch/arm64/kernel/vdso-ilp32/vdso-ilp32.lds.S > create mode 100644 include/linux/thread_bits.h > > -- > 2.7.4 > -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
