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riscv: add hardware error trap handler support #271

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riscv: add hardware error trap handler support #271

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1 change: 1 addition & 0 deletions arch/riscv/include/asm/asm-prototypes.h
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Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,7 @@ asmlinkage void riscv_v_context_nesting_end(struct pt_regs *regs);
#define DECLARE_DO_ERROR_INFO(name) asmlinkage void name(struct pt_regs *regs)

DECLARE_DO_ERROR_INFO(do_trap_unknown);
DECLARE_DO_ERROR_INFO(do_trap_hardware_error);
DECLARE_DO_ERROR_INFO(do_trap_insn_misaligned);
DECLARE_DO_ERROR_INFO(do_trap_insn_fault);
DECLARE_DO_ERROR_INFO(do_trap_insn_illegal);
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4 changes: 4 additions & 0 deletions arch/riscv/kernel/entry.S
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Expand Up @@ -406,6 +406,10 @@ SYM_DATA_START_LOCAL(excp_vect_table)
RISCV_PTR do_page_fault /* load page fault */
RISCV_PTR do_trap_unknown
RISCV_PTR do_page_fault /* store page fault */
RISCV_PTR do_trap_unknown /* double trap */
RISCV_PTR do_trap_unknown
RISCV_PTR do_trap_unknown /* software check error */
RISCV_PTR do_trap_hardware_error /* hardware error (19) */
SYM_DATA_END_LABEL(excp_vect_table, SYM_L_LOCAL, excp_vect_table_end)

#ifndef CONFIG_MMU
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2 changes: 2 additions & 0 deletions arch/riscv/kernel/traps.c
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Expand Up @@ -147,6 +147,8 @@ asmlinkage __visible __trap_section void name(struct pt_regs *regs) \

DO_ERROR_INFO(do_trap_unknown,
SIGILL, ILL_ILLTRP, "unknown exception");
DO_ERROR_INFO(do_trap_hardware_error,
SIGBUS, BUS_MCEERR_AR, "hardware error");
DO_ERROR_INFO(do_trap_insn_misaligned,
SIGBUS, BUS_ADRALN, "instruction address misaligned");
DO_ERROR_INFO(do_trap_insn_fault,
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