linux

iv/linux

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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

alpha

Scheduler updates in this cycle are:

2023-02-20 17:41:08 -08:00

arc

arch/idle: Change arch_cpu_idle() behavior: always exit with IRQs disabled

2023-01-13 11:48:15 +01:00

arm

Networking changes for 6.3.

2023-02-21 18:24:12 -08:00

arm64

Networking changes for 6.3.