Re: [PATCH v5 04/22] target/arm: Add helper_mte_check{1,2,3}

[Peter Maydell]

On Tue, 3 Dec 2019 at 16:06, Richard Henderson
<address@hidden> wrote:
> On 12/3/19 1:42 PM, Peter Maydell wrote:
> > This reads a bit oddly, because (in the final version of the spec)
> > physical and logical tags are identical (AArch64.PhysicalTag()
> > just returns bits [59:56] of the vaddr).
>
> I missed that change between draft and final.
>
> Wow, that's really annoying.  If they were going to drop physical vs logical
> tags, why did they keep the language?

It leaves space for a potential future architecture making
the mapping something other than 1:1.

> Is this really intentional?

Yes.

thanks
-- PMM