Hello. On 9/24/2014 1:45 PM, Paul Burton wrote:
Much like for traditional scalar FP exceptions, the cause bits in the MSACSR register need to be cleared following an MSA FP exception. Without doing so the exception will simply be raised again whenever the kernel restores MSACSR from a tasks saved context, leading to undesirable spurious exceptions. Clear the cause bits from the handle_msa_fpe function, mirroring the way handle_fpe clears the cause bits in FCSR.
Signed-off-by: Paul Burton <paul.burton@xxxxxxxxxx> --- arch/mips/kernel/genex.S | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/arch/mips/kernel/genex.S b/arch/mips/kernel/genex.S index ac35e12..ae84496 100644 --- a/arch/mips/kernel/genex.S +++ b/arch/mips/kernel/genex.S @@ -367,6 +367,15 @@ NESTED(nmi_handler, PT_SIZE, sp) STI .endm + .macro __build_clear_msa_fpe + _cfcmsa a1, MSA_CSR + li a2, ~(0x3f << 12) + and a2, a1 + _ctcmsa MSA_CSR, a1
Not a2?
+ TRACE_IRQS_ON + STI + .endm + .macro __build_clear_ade MFC0 t0, CP0_BADVADDR PTR_S t0, PT_BVADDR(sp)
WBR, Sergei
