Jiaxun Yang 7364d60c26 bpf, mips: Implement R4000 workarounds for JIT ... 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 according to workaround suggestion in the document. Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Acked-by: Johan Almbladh <johan.almbladh@anyfinetworks.com> Link: https://lore.kernel.org/bpf/20230228113305.83751-3-jiaxun.yang@flygoat.com		2023-02-28 14:52:55 +01:00
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Makefile	bpf, mips: Clean up config options about JIT	2021-10-11 15:29:37 +02:00
bpf_jit_comp.c	bpf, mips: Implement DADDI workarounds for JIT	2023-02-28 14:52:40 +01:00
bpf_jit_comp.h	mips, bpf: Fix reference to non-existing Kconfig symbol	2021-11-30 17:19:36 +01:00
bpf_jit_comp32.c	bpf, mips: No need to use min() to get MAX_TAIL_CALL_CNT	2022-08-29 15:38:14 +02:00
bpf_jit_comp64.c	bpf, mips: Implement R4000 workarounds for JIT	2023-02-28 14:52:55 +01:00