From: Sandipan Das sandipan@linux.ibm.com
[ Upstream commit 22b89ba178dd0a66a26699ead014a3e73ff8e044 ]
Commit 8813ff49607e ("powerpc/sstep: Check instruction validity against ISA version before emulation") introduced a proper way to skip unknown instructions. This makes sure that the same is used for the darn instruction when the range selection bits have a reserved value.
Fixes: a23987ef267a ("powerpc: sstep: Add support for darn instruction") Signed-off-by: Sandipan Das sandipan@linux.ibm.com Signed-off-by: Michael Ellerman mpe@ellerman.id.au Link: https://lore.kernel.org/r/20210204080744.135785-2-sandipan@linux.ibm.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/powerpc/lib/sstep.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c index 0f228ee11ca4..a2e067f68dee 100644 --- a/arch/powerpc/lib/sstep.c +++ b/arch/powerpc/lib/sstep.c @@ -1853,7 +1853,7 @@ int analyse_instr(struct instruction_op *op, const struct pt_regs *regs, goto compute_done; }
- return -1; + goto unknown_opcode; #ifdef __powerpc64__ case 777: /* modsd */ if (!cpu_has_feature(CPU_FTR_ARCH_300))