Re: [PATCH] Added missing EHB in mtc0 -> mfc0 sequence.

Paul Burton <paul.burton@xxxxxxxx> · Mon, 24 Jun 2019 21:15:49 +0000

Hello,

Dmitry Korotin wrote:
> Added missing EHB (Execution Hazard Barrier) in mtc0 -> mfc0 sequence.
> Without this execution hazard barrier it's possible for the value read
> back from the KScratch register to be the value from before the mtc0.
> 
> Reproduciable on P5600 & P6600.
> 
> Mips documentation Volume III (rev 6.03) table 8.1.
> 
> Signed-off-by: Dmitry Korotin <dkorotin@xxxxxxxxxxxx>

Applied to mips-fixes.

Thanks,
    Paul

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