From: Tianyu Lan <ltykernel@xxxxxxxxx> Sent: Sunday, April 16, 2023 12:21 AM > > On 4/12/2023 10:39 PM, Michael Kelley (LINUX) wrote: > >> + /* Read processor number and memory layout. */ > >> + processor_count = *(u32 *)__va(EN_SEV_SNP_PROCESSOR_INFO_ADDR); > >> + entry = (struct memory_map_entry *)(__va(EN_SEV_SNP_PROCESSOR_INFO_ADDR) > >> + + sizeof(struct memory_map_entry)); > > Why is the first map entry being skipped? > > The first entry is populated with processor count by Hyper-V. Perhaps add a comment to acknowledge that the behavior is a bit unexpected: The 0th entry in the memory layout array contains just a 32-bit processor count. Read that value and then skip over the reminder of the 0th entry. Start processing memory_map_entry's with array element 1. Michael
