arch/x86/amd-memory-encryption.rst

186 RMP segment covers a specific range of system physical addresses.
198                 Bits[5:0]  minimum supported RMP segment size
199                 Bits[11:6] maximum supported RMP segment size
202                 Bits[9:0]  number of cacheable RMP segment definitions
211                            segment (expressed as a power of 2)
213 The RMP segment size defined in the RMP_CFG MSR applies to all segments
214 of the RMP. Therefore each RMP segment covers a specific range of system
216 the RMP segment coverage value is 0x24 => 36, meaning the size of memory
217 covered by an RMP segment is 64GB (1 << 36). So the first RMP segment
218 covers physical addresses from 0 to 0xF_FFFF_FFFF, the second RMP segment
224 segment table (RST). Each entry in the RST is 8-bytes in size and represents
225 an RMP segment::
228                     The mapped size can be less than the defined segment size.
230                     of system physical addresses associated with this segment.
231         Bits[51:20] segment physical address
233                     read) to form the physical address of the segment (1MB
236 The RST can hold 512 segment entries but can be limited in size to the number