mirror of
https://github.com/nxp-imx/linux-imx.git
synced 2025-12-24 03:17:50 +01:00
7364d60c26
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 |
||
|---|---|---|
| .. | ||
| alpha | ||
| arc | ||
| arm | ||
| arm64 | ||
| csky | ||
| hexagon | ||
| ia64 | ||
| loongarch | ||
| m68k | ||
| microblaze | ||
| mips | ||
| nios2 | ||
| openrisc | ||
| parisc | ||
| powerpc | ||
| riscv | ||
| s390 | ||
| sh | ||
| sparc | ||
| um | ||
| x86 | ||
| xtensa | ||
| .gitignore | ||
| Kconfig | ||