CVSROOT: /cvs
Module name: src
Changes by: [email protected] 2024/09/03 11:19:53
Modified files:
sys/arch/amd64/amd64: pmap.c
Log message:
For virtual addresses use fixed page frame without AMD SEV reduction.
When running as a SEV guest, page frame mask is calculated from the
CPUID provided "physical address bit reduction". The amd64 pmap
code uses the variable pg_frame instead of the defined PG_FRAME
0x000ffffffffff000.
There was one instance in pmap code where pg_frame was applied to
virtual address, not physical address. On some machines the address
bit reduction is rather large with six bits. So the calculated
pg_frame is 0x00003fffffe00000. However, on amd64 VM_MAX_ADDRESS
is defined as 0x00007fbfdfeff000. Masking a such large address
with pg_frame caused havoc. Therefore, when masking virtual
addresses, still use PG_FRAME.
from hshoexer@
