diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2020-07-20 10:25:36 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2020-07-20 11:35:15 +0100 |
| commit | 6f4e1405b91da0d0a1084ae3aff2bd308432778f (patch) | |
| tree | 8a719b20945a96a970dea2a10aa4915edb6f3ba7 /target/arm/cpu64.c | |
| parent | 873ec69aeb12e24eec7fb317fd0cd8494e8489dd (diff) | |
hw/arm/virt: Enable MTE via a machine property
Control this cpu feature via a machine property, much as we do
with secure=on, since both require specialized support in the
machine setup to be functional.
Default MTE to off, since this feature implies extra overhead.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200713213341.590275-2-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target/arm/cpu64.c')
| -rw-r--r-- | target/arm/cpu64.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/target/arm/cpu64.c b/target/arm/cpu64.c index 15494002d2..dd696183df 100644 --- a/target/arm/cpu64.c +++ b/target/arm/cpu64.c @@ -646,8 +646,9 @@ 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. + * Begin with full support for MTE. This will be downgraded to MTE=0 + * during realize if the board provides no tag memory, much like + * we do for EL2 with the virtualization=on property. */ t = FIELD_DP64(t, ID_AA64PFR1, MTE, 2); cpu->isar.id_aa64pfr1 = t; |