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

From: Peter Maydell
Subject: Re: [PATCH v5 04/22] target/arm: Add helper_mte_check{1,2,3}
Date: Tue, 3 Dec 2019 16:26:35 +0000

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?


-- PMM

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