[RFC PATCH 0/9] powerpc/64: Build with PC-Relative addressing

[Nicholas Piggin]

This is a more complete change than my earlier hack. Namely fixed the
boot code so it's more unified rather than adding a special case for
Book3S+PCREL. Lots of bug fixes, and adding some of the ftrace and BPF
trampoline/stubs. And added module support, which might be the most
interesting bit.

This won't see a lot of real use until POWER10 is the oldest supported
CPU for distros, but being as we're quite a unique user of toolchain I'd
like to start ironing things out earlier rather than later. I'm making a
list of observations here, https://github.com/linuxppc/issues/issues/455
and will take them to toolchan developers after the kernel work is a bit
further along.

Thanks,
Nick

Nicholas Piggin (9):
  crypto: powerpc - Use address generation helper for asm
  powerpc/64s: Refactor initialisation after prom
  powerpc/64e: Simplify address calculation in secondary hold loop
  powerpc/64: Move initial base and TOC pointer calculation
  powerpc/64s: Run at the kernel virtual address earlier in boot
  powerpc: add CFUNC assembly label annotation
  powerpc/64: Add support to build with prefixed instructions
  powerpc/64: vmlinux support building with PCREL addresing
  powerpc/64: modules support building with PCREL addresing

 arch/powerpc/Kconfig                    |   6 +
 arch/powerpc/Makefile                   |  10 +
 arch/powerpc/crypto/crc32-vpmsum_core.S |  13 +-
 arch/powerpc/include/asm/atomic.h       |  24 +-
 arch/powerpc/include/asm/io.h           |  37 +++
 arch/powerpc/include/asm/module.h       |   9 +-
 arch/powerpc/include/asm/paca.h         |   2 +
 arch/powerpc/include/asm/ppc-opcode.h   |   8 +
 arch/powerpc/include/asm/ppc_asm.h      |  24 ++
 arch/powerpc/include/asm/sections.h     |   5 +
 arch/powerpc/include/asm/uaccess.h      |  28 +-
 arch/powerpc/include/uapi/asm/elf.h     |   4 +
 arch/powerpc/kernel/asm-offsets.c       |   2 +
 arch/powerpc/kernel/exceptions-64s.S    | 112 ++++----
 arch/powerpc/kernel/head_64.S           | 179 +++++++-----
 arch/powerpc/kernel/interrupt_64.S      |  28 +-
 arch/powerpc/kernel/irq.c               |   8 +
 arch/powerpc/kernel/misc_64.S           |   2 +-
 arch/powerpc/kernel/module_64.c         | 344 ++++++++++++++++++++----
 arch/powerpc/kernel/paca.c              |   2 +
 arch/powerpc/kernel/trace/ftrace.c      |  52 +++-
 arch/powerpc/kernel/vdso/gettimeofday.S |   6 +-
 arch/powerpc/kernel/vector.S            |   6 +
 arch/powerpc/kernel/vmlinux.lds.S       |   6 +
 arch/powerpc/kvm/book3s_hv_rmhandlers.S |  16 +-
 arch/powerpc/lib/copypage_64.S          |   4 +-
 arch/powerpc/lib/copypage_power7.S      |   4 +-
 arch/powerpc/lib/copyuser_power7.S      |   8 +-
 arch/powerpc/lib/hweight_64.S           |   8 +-
 arch/powerpc/lib/memcmp_64.S            |   4 +-
 arch/powerpc/lib/memcpy_power7.S        |   6 +-
 arch/powerpc/net/bpf_jit.h              |  10 +-
 arch/powerpc/net/bpf_jit_comp64.c       |  35 ++-
 arch/powerpc/platforms/Kconfig.cputype  |  38 +++
 arch/powerpc/platforms/pseries/hvCall.S |   4 +-
 arch/powerpc/xmon/xmon.c                |   2 +
 36 files changed, 793 insertions(+), 263 deletions(-)

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2.37.2