On Wed, Jul 07, 2021 at 01:35:40PM -0500, Brijesh Singh wrote: > The memory integrity guarantees of SEV-SNP are enforced through a new > structure called the Reverse Map Table (RMP). The RMP is a single data > structure shared across the system that contains one entry for every 4K > page of DRAM that may be used by SEV-SNP VMs. The goal of RMP is to > track the owner of each page of memory. Pages of memory can be owned by > the hypervisor, owned by a specific VM or owned by the AMD-SP. See APM2 > section 15.36.3 for more detail on RMP. > > The RMP table is used to enforce access control to memory. The table itself > is not directly writable by the software. New CPU instructions (RMPUPDATE, > PVALIDATE, RMPADJUST) are used to manipulate the RMP entries. What's the point of throwing out a set of opcodes, if there's no explanation what they do? BR, Jarkko
