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| author | Steven Price <steven.price@arm.com> | 2021-06-21 12:17:14 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2021-06-22 14:08:06 +0100 |
| commit | 673638f434ee4a00319e254ade338c57618d6f7e (patch) | |
| tree | ab92e5e123706b8fb12e9fb5f4cd26c0dc3ee487 /arch/arm64/kvm/reset.c | |
| parent | e1f358b5046479d2897f23b1d5b092687c6e7a67 (diff) | |
| download | linux-673638f434ee4a00319e254ade338c57618d6f7e.tar.bz2 | |
KVM: arm64: Expose KVM_ARM_CAP_MTE
It's now safe for the VMM to enable MTE in a guest, so expose the
capability to user space.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210621111716.37157-5-steven.price@arm.com
Diffstat (limited to 'arch/arm64/kvm/reset.c')
| -rw-r--r-- | arch/arm64/kvm/reset.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c index d37ebee085cf..cba7872d69a8 100644 --- a/arch/arm64/kvm/reset.c +++ b/arch/arm64/kvm/reset.c @@ -176,6 +176,10 @@ static bool vcpu_allowed_register_width(struct kvm_vcpu *vcpu) if (!cpus_have_const_cap(ARM64_HAS_32BIT_EL1) && is32bit) return false; + /* MTE is incompatible with AArch32 */ + if (kvm_has_mte(vcpu->kvm) && is32bit) + return false; + /* Check that the vcpus are either all 32bit or all 64bit */ kvm_for_each_vcpu(i, tmp, vcpu->kvm) { if (vcpu_has_feature(tmp, KVM_ARM_VCPU_EL1_32BIT) != is32bit) |