[qemu-riscv] Question: RISC-V CoVE (Confidential VM Ex tension) support in QEMU-KVM

Hi all,
We are working on RISC-V CoVE (Confidential VM Extension, defined by the AP-TEE specification) support, and we have prepared patches to launch Trusted VMs (TVMs) via QEMU-KVM on CoVE-capable hardware.
Before we submit the patch series, we have a few questions:

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Has anyone already submitted or is working on CoVE support for QEMU? We want to avoid duplicating effort.

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Our patches are based on the current master branch. Is master the right target, or is there a preferred feature branch or subsystem tree (e.g. riscv-to-apply.next) we should base on?

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Any preferences on how to structure the series? Our changes touch target/riscv KVM code for TVM creation, and vCPU lifecycle management.
For reference, CoVE is the RISC-V equivalent of AMD SEV / Intel TDX, specified at: https://github.com/riscv-non-isa/riscv-ap-tee <https://github.com/riscv-non-isa/riscv-ap-tee >
Thanks for any guidance!
Best regards,
Baolong Duan