Re: [RFC PATCH 03/21] x86/virt/tdx: Add SEAMCALL wrapper tdh_mem_page_demote()

[Binbin Wu]

On 4/24/2025 11:04 AM, Yan Zhao wrote:
> From: Xiaoyao Li <xiaoyao.li@xxxxxxxxx>
>
> Add a wrapper tdh_mem_page_demote() to invoke SEAMCALL TDH_MEM_PAGE_DEMOTE
> to demote a huge leaf entry to a non-leaf entry in S-EPT. Currently, the
> TDX module only supports demotion of a 2M huge leaf entry. After a
> successful demotion, the old 2M huge leaf entry in S-EPT is replaced with a
> non-leaf entry, linking to the newly-added page table page. The newly
> linked page table page then contains 512 leaf entries, pointing to the 2M

2M or 4K?

> guest private pages.
[...]