CVS commit: [netbsd-11] src/sys/uvm/pmap

["Martin Husemann" <martin%netbsd.org@localhost>]

Module Name:    src
Committed By:   martin
Date:           Fri Sep 18 16:41:40 UTC 2026

Modified Files:
        src/sys/uvm/pmap [netbsd-11]: pmap.c

Log Message:
Pull up following revision(s) (requested by skrll in ticket #472):

        sys/uvm/pmap/pmap.c: revision 1.100
        sys/uvm/pmap/pmap.c: revision 1.101
        sys/uvm/pmap/pmap.c: revision 1.98
        sys/uvm/pmap/pmap.c: revision 1.99
        sys/uvm/pmap/pmap.c: revision 1.108
        sys/uvm/pmap/pmap.c: revision 1.87

Fix two EXECness issues
- when creating a WX mapping via pmap_enter mark the page as EXEC
- when pmap_protect adds X then ensure that pmap_page_syncicache is called
  for the page.

Whitespace

Code re-org. Add a comment.
NFCI.

mi pmap: pmap_clear_attribute should check cached value of the attribute

The pmap_clear_attribute implementation used by the MI pmap should
check the cached valued of the attribute as well as any value held
in the PTE(s).

Some emulation implementations require this as some operations, e.g
changing page mappings to RO, can lose PTE attribute information.
mi pmap: capture PTE (HW updated) referenced and modified bits

When removing a page mapping or changing its protection capture any
HW updated referenced and modified bits.

PR/60522: evbppc/RB800 hits MI pmap KASSERT failure

Revert the pmap_protect part of
    Fix two EXECness issues
    - when creating a WX mapping via pmap_enter mark the page as EXEC
    - when pmap_protect adds X then ensure that pmap_page_syncicache is called
      for the page.

It seems that pmap_pte_protect is designed to remove a protection and not
add it.

For the module loading the text is indeed mapped eXecute initially, and
cache maintenance is currently handled by kobj_machdep and not the pmap.


To generate a diff of this commit:
cvs rdiff -u -r1.80.4.2 -r1.80.4.3 src/sys/uvm/pmap/pmap.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.