diff options
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/ppc-opcode.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/kernel/traps.c | 16 |
2 files changed, 17 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/ppc-opcode.h b/arch/powerpc/include/asm/ppc-opcode.h index ca5a0da7df4e..ef6972aa33b9 100644 --- a/arch/powerpc/include/asm/ppc-opcode.h +++ b/arch/powerpc/include/asm/ppc-opcode.h @@ -222,6 +222,7 @@ #define OP_31_XOP_STFSX 663 #define OP_31_XOP_STFSUX 695 #define OP_31_XOP_STFDX 727 +#define OP_31_XOP_HASHCHK 754 #define OP_31_XOP_STFDUX 759 #define OP_31_XOP_LHBRX 790 #define OP_31_XOP_LFIWAX 855 diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 9bdd79aa51cf..e59ec6d32d37 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -1516,6 +1516,22 @@ static void do_program_check(struct pt_regs *regs) return; } } + + if (cpu_has_feature(CPU_FTR_DEXCR_NPHIE) && user_mode(regs)) { + ppc_inst_t insn; + + if (get_user_instr(insn, (void __user *)regs->nip)) { + _exception(SIGSEGV, regs, SEGV_MAPERR, regs->nip); + return; + } + + if (ppc_inst_primary_opcode(insn) == 31 && + get_xop(ppc_inst_val(insn)) == OP_31_XOP_HASHCHK) { + _exception(SIGILL, regs, ILL_ILLOPN, regs->nip); + return; + } + } + _exception(SIGTRAP, regs, TRAP_BRKPT, regs->nip); return; } |