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Re: [PATCH v3 7/7] target/arm: Honor the HCR_EL2.TTLB bit

From: Peter Maydell
Subject: Re: [PATCH v3 7/7] target/arm: Honor the HCR_EL2.TTLB bit
Date: Tue, 25 Feb 2020 17:49:43 +0000

On Tue, 25 Feb 2020 at 17:46, Richard Henderson
<address@hidden> wrote:
> On 2/25/20 4:01 AM, Peter Maydell wrote:
> > The set of operations this traps differs when ARMv8.4-TLBI is
> > implemented. It looks like you've applied this access fn to
> > the wider with-v8.4-TLBI set? (eg TLBI_VMALLE1 is only trapped
> > with ARMv8.4-TLBI, not without.)
> Um, that's not true.
> ARMv8.4-TLBI adds the *OS and R* insns, and extends this bit to apply there.
> But all of the original v8.0 insns are unchanged.

Oh, the spec has confused me by listing the TLBI operations
in a different order in the "with v8.4-TLBI" section (where
it starts with 'TLBI VMALLE1') and in the "otherwise" section
(where it starts with 'TLBI VMALLE1IS' but 'TLBI VMALLE1'
is still in the list, just later on).

-- PMM

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