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target/arm: Enable MTE

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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.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200626033144.790098-46-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2020-06-25 20:31:43 -07:00 committed by Peter Maydell
parent e4d5bf4fbd
commit c7459633ba
1 changed files with 5 additions and 0 deletions
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target/arm/cpu64.c
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@ -654,6 +654,11 @@ static void aarch64_max_initfn(Object *obj)
t = cpu->isar.id_aa64pfr1;
t = FIELD_DP64(t, ID_AA64PFR1, BT, 1);
/*
* Begin with full support for MTE; will be downgraded to MTE=1
* during realize if the board provides no tag memory.
*/
t = FIELD_DP64(t, ID_AA64PFR1, MTE, 2);
cpu->isar.id_aa64pfr1 = t;
t = cpu->isar.id_aa64mmfr1;