Re: [PATCH v1 25/40] i386/tdx: Track RAM entries for TDX VM

Gerd Hoffmann
2022-08-26T09:16:13Z

On Tue, Aug 02, 2022 at 03:47:35PM +0800, Xiaoyao Li wrote:
> The RAM of TDX VM can be classified into two types:
>
> - TDX_RAM_UNACCEPTED: default type of TDX memory, which needs to be
> accepted by TDX guest before it can be used and will be all-zeros
> after being accepted.
>
> - TDX_RAM_ADDED: the RAM that is ADD'ed to TD guest before running, and
> can be used directly. E.g., TD HOB and TEMP MEM that needed by TDVF.
>
> Maintain TdxRamEntries[] which grabs the initial RAM info from e820 table
> and mark each RAM range as default type TDX_RAM_UNACCEPTED.
>
> Then turn the range of TD HOB and TEMP MEM to TDX_RAM_ADDED since these
> ranges will be ADD'ed before TD runs and no need to be accepted runtime.
>
> The TdxRamEntries[] are later used to setup the memory TD resource HOB
> that passes memory info from QEMU to TDVF.
>
> Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>

Acked-by: Gerd Hoffmann <kraxel@redhat.com>