On 6/4/23 07:27, Kai Huang wrote: > + /* > + * Loop over TDX memory regions and fill out TDMRs to cover them. > + * To keep it simple, always try to use one TDMR to cover one > + * memory region. > + * > + * In practice TDX1.0 supports 64 TDMRs, which is big enough to > + * cover all memory regions in reality if the admin doesn't use > + * 'memmap' to create a bunch of discrete memory regions. When > + * there's a real problem, enhancement can be done to merge TDMRs > + * to reduce the final number of TDMRs. > + */ Rather than focus in on one specific command-line parameter, let's just say: In practice TDX supports at least 64 TDMRs. A 2-socket system typically only consumes <NUMBER> of those. This code is dumb and simple and may use more TMDRs than is strictly required. Let's also put a pr_warn() in here if we exceed, say 1/2 or maybe 3/4 of the 64. We'll hopefully start to get reports somewhat in advance if systems get close to the limit.
