Re: Fast-track extension proposal for "Sv32 Svnapot and Svpbmt"


Greg Favor
 

On Mon, Jul 25, 2022 at 12:13 AM Guo Ren <guoren@...> wrote:
> Further the behavior that bit 31 of Sv32x4 PTE becomes ignored
> when menvcfg.PBMTE is 1 is important to call out.
Okay, add the sentence:
The bit 31-29 of any Sv32x4 PTE becomes ignored from address bits when
menvcfg.PBMTE is 1.

Note that in general reserved PTE bits that are non-zero - whether due to the bit still simply being reserved, or it corresponding to an unimplemented extension or to a disabled extension (via *envcfg) - result in a Page Fault exception, i.e. they are not ignored.
 
Greg

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