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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.

Backports commit c7459633baa71d1781fde4a245d6ec9ce2f008cf from qemu
This commit is contained in:
Richard Henderson 2021-02-25 23:00:21 -05:00 committed by Lioncash
parent a34fda25b0
commit 54e2107bdf
1 changed files with 5 additions and 0 deletions
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5
qemu/target/arm/cpu64.c
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@ -299,6 +299,11 @@ static void aarch64_max_initfn(struct uc_struct *uc, Object *obj, void *opaque)
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;