[PATCH v3 00/10] Improve trap handling for nested traps

[Anup Patel <apatel@ventanamicro.com>]

Nested traps will be a common when dealing with RAS error traps so
this series improves trap handling for nested traps by introducing
a linked-list based trap context chain.

These patches can also be found the trap_handling_imp_v3 branch at
https://github.com/avpatel/opensbi.git

Changes since v2:
 - Addressed comments in PATCH4, PATCH6, PATCH7, PATCH8, and PATCH10.

Changes since v1:
 - Include samuel's patch in the series
 - Embed sbi_trap_regs and sbi_trap_info in the new
   struct sbi_trap_context
 - Drop the mcause parameter of sbi_trap_aia_irq()

Anup Patel (9):
  lib: sbi: Remove sbi_trap_exit() and related code
  include: sbi: Add trap_context pointer in struct sbi_scratch
  lib: sbi: Introduce trap context
  lib: sbi: Simplify parameters of misaligned and access fault handlers
  lib: sbi: Simplify parameters of sbi_illegal_insn_handler()
  lib: sbi: Remove regs paramter of sbi_irqchip_process()
  lib: sbi: Remove regs parameter from trap irq handling functions
  lib: sbi: Pass trap context pointer to sbi_ecall_handler()
  lib: sbi: Extend sbi_trap_error() to dump state in a nested trap

Samuel Holland (1):
  lib: sbi: Remove epc from struct sbi_trap_info

 firmware/fw_base.S             |  76 +++++++++----
 include/sbi/riscv_encoding.h   |   2 +
 include/sbi/sbi_ecall.h        |   4 +-
 include/sbi/sbi_illegal_insn.h |   4 +-
 include/sbi/sbi_irqchip.h      |   5 +-
 include/sbi/sbi_scratch.h      |  14 +--
 include/sbi/sbi_trap.h         |  45 ++++++--
 include/sbi/sbi_trap_ldst.h    |  12 +-
 lib/sbi/sbi_ecall.c            |   3 +-
 lib/sbi/sbi_ecall_legacy.c     |   4 -
 lib/sbi/sbi_expected_trap.S    |   4 -
 lib/sbi/sbi_illegal_insn.c     |   9 +-
 lib/sbi/sbi_irqchip.c          |  10 +-
 lib/sbi/sbi_trap.c             | 196 +++++++++++++++------------------
 lib/sbi/sbi_trap_ldst.c        |  71 ++++++------
 lib/utils/irqchip/imsic.c      |   2 +-
 16 files changed, 239 insertions(+), 222 deletions(-)

-- 
2.34.1