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arm/kvm: add support for MTE

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Extend the 'mte' property for the virt machine to cover KVM as
well. For KVM, we don't allocate tag memory, but instead enable the
capability.

If MTE has been enabled, we need to disable migration, as we do not
yet have a way to migrate the tags as well. Therefore, MTE will stay
off with KVM unless requested explicitly.

Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230428095533.21747-2-cohuck@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Cornelia Huck 2023-04-28 11:55:33 +02:00 • committed by Peter Maydell
parent 96e6d25fdd
commit b320e21c48
6 changed files with 109 additions and 36 deletions
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5
target/arm/kvm64.c
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@ -756,6 +756,11 @@ bool kvm_arm_steal_time_supported(void)
return kvm_check_extension(kvm_state, KVM_CAP_STEAL_TIME);
}
bool kvm_arm_mte_supported(void)
{
return kvm_check_extension(kvm_state, KVM_CAP_ARM_MTE);
}
QEMU_BUILD_BUG_ON(KVM_ARM64_SVE_VQ_MIN != 1);
uint32_t kvm_arm_sve_get_vls(CPUState *cs)