[GIT PULL] RISC-V Patches for the 5.2 Merge Window, Part 1

[Palmer Dabbelt]

The following changes since commit 085b7755808aa11f78ab9377257e1dad2e6fa4bb:

  Linux 5.1-rc6 (2019-04-21 10:45:57 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux.git tags/riscv-for-linus-5.2-mw0

for you to fetch changes up to e23fc917f04ffac8c156fdb4ee8b56f3867fa50b:

  RISC-V: Avoid using invalid intermediate translations (2019-05-08 15:06:18 -0700)

----------------------------------------------------------------
RISC-V Patches for the 5.2 Merge Window, Part 1

This patch set contains an assortment of RISC-V related patches that I'd
like to target for the 5.2 merge window.  Most of the patches are
cleanups, but there are a handful of user-visible changes:

* The nosmp and nr_cpus command-line arguments are now supported, which
  work like normal.
* The SBI console no longer installs itself as a preferred console, we
  rely on standard mechanisms (/chosen, command-line, hueristics)
  instead.
* sfence_remove_sfence_vma{,_asid} now pass their arguments along to the
  SBI call.
* Modules now support BUG().
* A missing sfence.vma during boot has been added.  This bug only
  manifests during boot.

I've only tested this on QEMU again, as I didn't have time to get things
running on the Unleashed.  The latest master from this morning merges in
cleanly and passes the tests as well.

----------------------------------------------------------------
Anup Patel (4):
      RISC-V: Use tabs to align macro values in asm/csr.h
      RISC-V: Add interrupt related SCAUSE defines in asm/csr.h
      RISC-V: Access CSRs using CSR numbers
      tty: Don't force RISCV SBI console as preferred console

Atish Patra (4):
      RISC-V: Add RISC-V specific arch_match_cpu_phys_id
      RISC-V: Implement nosmp commandline option.
      RISC-V: Support nr_cpus command line option.
      RISC-V: Fix minor checkpatch issues.

Christoph Hellwig (11):
      riscv: use asm-generic/extable.h
      riscv: turn mm_segment_t into a struct
      riscv: remove unreachable big endian code
      riscv: remove CONFIG_RISCV_ISA_A
      riscv: clear all pending interrupts when booting
      riscv: simplify the stack pointer setup in head.S
      riscv: cleanup the parse_dtb calling conventions
      riscv: remove unreachable !HAVE_FUNCTION_GRAPH_RET_ADDR_PTR code
      riscv: remove duplicate macros from ptrace.h
      riscv: print the unexpected interrupt cause
      riscv: call pm_power_off from machine_halt / machine_power_off

Gary Guo (3):
      riscv: move flush_icache_{all,mm} to cacheflush.c
      riscv: move switch_mm to its own file
      riscv: fix sbi_remote_sfence_vma{,_asid}.

Guo Ren (1):
      riscv/signal: Fixup additional syscall restarting

Nick Desaulniers (1):
      riscv: vdso: drop unnecessary cc-ldoption

Palmer Dabbelt (1):
      RISC-V: Avoid using invalid intermediate translations

Vincent Chen (3):
      riscv: support trap-based WARN()
      riscv: Add the support for c.ebreak check in is_valid_bugaddr()
      riscv: Support BUG() in kernel module

 arch/riscv/Kconfig                   |   6 +-
 arch/riscv/Makefile                  |   5 +-
 arch/riscv/include/asm/Kbuild        |   1 +
 arch/riscv/include/asm/bug.h         |  35 ++++++----
 arch/riscv/include/asm/cacheflush.h  |   2 +-
 arch/riscv/include/asm/csr.h         | 123 ++++++++++++++++++++++-------------
 arch/riscv/include/asm/elf.h         |   6 --
 arch/riscv/include/asm/futex.h       |  13 ----
 arch/riscv/include/asm/irqflags.h    |  10 +--
 arch/riscv/include/asm/mmu_context.h |  59 +----------------
 arch/riscv/include/asm/ptrace.h      |  21 ++----
 arch/riscv/include/asm/sbi.h         |  19 ++++--
 arch/riscv/include/asm/thread_info.h |   4 +-
 arch/riscv/include/asm/uaccess.h     |  28 +++-----
 arch/riscv/kernel/asm-offsets.c      |   3 -
 arch/riscv/kernel/cpu.c              |   3 +-
 arch/riscv/kernel/entry.S            |  22 +++----
 arch/riscv/kernel/head.S             |  33 ++++++----
 arch/riscv/kernel/irq.c              |  19 ++----
 arch/riscv/kernel/perf_event.c       |   4 +-
 arch/riscv/kernel/reset.c            |  15 +++--
 arch/riscv/kernel/setup.c            |   6 +-
 arch/riscv/kernel/signal.c           |   6 ++
 arch/riscv/kernel/smp.c              |  61 +++--------------
 arch/riscv/kernel/smpboot.           |   0
 arch/riscv/kernel/smpboot.c          |  22 ++++++-
 arch/riscv/kernel/stacktrace.c       |  14 ++--
 arch/riscv/kernel/traps.c            |  30 ++++++---
 arch/riscv/kernel/vdso/Makefile      |   2 +-
 arch/riscv/mm/Makefile               |   1 +
 arch/riscv/mm/cacheflush.c           |  61 +++++++++++++++++
 arch/riscv/mm/context.c              |  69 ++++++++++++++++++++
 arch/riscv/mm/fault.c                |   6 +-
 drivers/tty/hvc/hvc_riscv_sbi.c      |   1 -
 34 files changed, 390 insertions(+), 320 deletions(-)
 create mode 100644 arch/riscv/kernel/smpboot.
 create mode 100644 arch/riscv/mm/context.c