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Re: [PATCH v7 39/42] target/arm: Enable MTE
From: |
Peter Maydell |
Subject: |
Re: [PATCH v7 39/42] target/arm: Enable MTE |
Date: |
Thu, 18 Jun 2020 17:39:02 +0100 |
On Wed, 3 Jun 2020 at 02:14, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> We now implement all of the components of MTE, without actually
> supporting any tagged memory. All MTE instructions will work,
> trivially, so we can enable support.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> v6: Delay user-only cpu reset bits to the user-only patch set.
> ---
> target/arm/cpu64.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c
> index cbc5c3868f..e4bce55c5f 100644
> --- a/target/arm/cpu64.c
> +++ b/target/arm/cpu64.c
> @@ -655,6 +655,7 @@ static void aarch64_max_initfn(Object *obj)
>
> t = cpu->isar.id_aa64pfr1;
> t = FIELD_DP64(t, ID_AA64PFR1, BT, 1);
> + t = FIELD_DP64(t, ID_AA64PFR1, MTE, 2);
> cpu->isar.id_aa64pfr1 = t;
If we don't actually have tagged memory yet should we really
set the MTE field to 2 rather than 1 ?
thanks
-- PMM
- [PATCH v7 32/42] target/arm: Add mte helpers for sve scalar + int stores, (continued)
- [PATCH v7 32/42] target/arm: Add mte helpers for sve scalar + int stores, Richard Henderson, 2020/06/02
- [PATCH v7 34/42] target/arm: Handle TBI for sve scalar + int memory ops, Richard Henderson, 2020/06/02
- [PATCH v7 33/42] target/arm: Add mte helpers for sve scalar + int ff/nf loads, Richard Henderson, 2020/06/02
- [PATCH v7 36/42] target/arm: Complete TBI clearing for user-only for SVE, Richard Henderson, 2020/06/02
- [PATCH v7 35/42] target/arm: Add mte helpers for sve scatter/gather memory ops, Richard Henderson, 2020/06/02
- [PATCH v7 38/42] target/arm: Set PSTATE.TCO on exception entry, Richard Henderson, 2020/06/02
- [PATCH v7 37/42] target/arm: Implement data cache set allocation tags, Richard Henderson, 2020/06/02
- [PATCH v7 39/42] target/arm: Enable MTE, Richard Henderson, 2020/06/02
- Re: [PATCH v7 39/42] target/arm: Enable MTE,
Peter Maydell <=
- [PATCH v7 40/42] target/arm: Cache the Tagged bit for a page in MemTxAttrs, Richard Henderson, 2020/06/02
- [PATCH v7 41/42] target/arm: Create tagged ram when MTE is enabled, Richard Henderson, 2020/06/02
- [PATCH v7 42/42] target/arm: Add allocation tag storage for system mode, Richard Henderson, 2020/06/02
- Re: [PATCH v7 00/42] target/arm: Implement ARMv8.5-MemTag, system mode, no-reply, 2020/06/02
- Re: [PATCH v7 00/42] target/arm: Implement ARMv8.5-MemTag, system mode, Peter Maydell, 2020/06/19