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| author | Oliver Upton <oliver.upton@linux.dev> | 2023-04-04 15:40:46 +0000 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2023-04-05 12:07:41 +0100 |
| commit | 821d935c87bc95253f82deec3cbb457ccf3de003 (patch) | |
| tree | f1c5b3ba2f0d8cd98396d520027f907ea46a7d93 /include/kvm | |
| parent | d824dff1919bbd523d4d5c860437d043c0ad121d (diff) | |
| download | linux-stable-821d935c87bc95253f82deec3cbb457ccf3de003.tar.gz linux-stable-821d935c87bc95253f82deec3cbb457ccf3de003.tar.bz2 linux-stable-821d935c87bc95253f82deec3cbb457ccf3de003.zip | |
KVM: arm64: Introduce support for userspace SMCCC filtering
As the SMCCC (and related specifications) march towards an 'everything
and the kitchen sink' interface for interacting with a system it becomes
less likely that KVM will support every related feature. We could do
better by letting userspace have a crack at it instead.
Allow userspace to define an 'SMCCC filter' that applies to both HVCs
and SMCs initiated by the guest. Supporting both conduits with this
interface is important for a couple of reasons. Guest SMC usage is table
stakes for a nested guest, as HVCs are always taken to the virtual EL2.
Additionally, guests may want to interact with a service on the secure
side which can now be proxied by userspace.
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230404154050.2270077-10-oliver.upton@linux.dev
Diffstat (limited to 'include/kvm')
| -rw-r--r-- | include/kvm/arm_hypercalls.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/kvm/arm_hypercalls.h b/include/kvm/arm_hypercalls.h index fe6c31575b05..2df152207ccd 100644 --- a/include/kvm/arm_hypercalls.h +++ b/include/kvm/arm_hypercalls.h @@ -49,4 +49,7 @@ int kvm_arm_copy_fw_reg_indices(struct kvm_vcpu *vcpu, u64 __user *uindices); int kvm_arm_get_fw_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); int kvm_arm_set_fw_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); +int kvm_vm_smccc_has_attr(struct kvm *kvm, struct kvm_device_attr *attr); +int kvm_vm_smccc_set_attr(struct kvm *kvm, struct kvm_device_attr *attr); + #endif |