For R4000 erratas around multiplication and division instructions,
as our use of those instructions are always followed by mflo/mfhi
instructions, the only issue we need care is
"MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0" Errata 28:
"A double-word or a variable shift may give an incorrect result if
executed while an integer multiplication is in progress."
We just emit a mfhi $0 to ensure the operation is completed after
every multiplication instruction accorading to workaround suggestion
in the document.
Signed-off-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
---
arch/mips/Kconfig | 4 +---
arch/mips/net/bpf_jit_comp32.c | 4 ++++
arch/mips/net/bpf_jit_comp64.c | 3 +++
3 files changed, 8 insertions(+), 3 deletions(-)