[RFC PATCH 0/5] RISC-V: Improve smp functionality & support cpu hotplug

[Atish Patra]

This patch series implements following smp related features.
Some of the work has been inspired from ARM64.

1. Decouple linux logical cpu ids from hardware cpu id
2. Introduce cpu_operations structure for better flexibility &
  extesnability of future smp enablement methods. It also makes it
  easier to implement different booting algorithms later.
3. Support cpu hotplug.

Tested on QEMU & HighFive Unleashed board with/without SMP enabled.

Atish Patra (5):
  RISC-V: Add logical CPU indexing for RISC-V
  RISC-V: Use Linux logical cpu number instead of hartid
  RISC-V: Add cpu_operatios structure
  RISC-V: Move interrupt cause declarations to irq.h
  RISC-V: Support cpu hotplug.

 arch/riscv/Kconfig                |  12 ++-
 arch/riscv/include/asm/irq.h      |   7 ++
 arch/riscv/include/asm/smp.h      |  42 +++++++++-
 arch/riscv/include/asm/tlbflush.h |  17 +++-
 arch/riscv/kernel/cpu.c           |   4 +-
 arch/riscv/kernel/head.S          |  13 +++
 arch/riscv/kernel/irq.c           |   7 --
 arch/riscv/kernel/process.c       |   7 ++
 arch/riscv/kernel/setup.c         |  27 +++++++
 arch/riscv/kernel/smp.c           |  51 +++++++++---
 arch/riscv/kernel/smpboot.c       | 161 +++++++++++++++++++++++++++++++++-----
 arch/riscv/kernel/traps.c         |   6 +-
 drivers/clocksource/riscv_timer.c |  12 ++-
 drivers/irqchip/irq-sifive-plic.c |  11 ++-
 14 files changed, 325 insertions(+), 52 deletions(-)

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2.7.4