[PATCH 0/9] x86/mm: CPA robustness fixes and cleanups

["Mike Rapoport (Microsoft)" <rppt@kernel.org>]

These are x86 CPA robustness fixes and cleanups I found while working on
a generic implementation of the set_memory APIs.

The first three patches fix issues that are unlikely to happen in
practice, but are still worth fixing even if only to avoid LLM spam:
* CPA does not flush the TLB when only an alias of the requested range
  changes, and the alias keeps stale TLB entries.
* mark_rodata_ro() ignores a failure to write protect the kernel and
  enables the read-only protections anyway.
* set_memory_encrypted() and set_memory_decrypted() map random physical
  memory at an unmapped address instead of failing.

The rest are smaller robustness changes and cleanups.

---
Mike Rapoport (Microsoft) (9):
      x86/mm/pat: flush the TLB when only an alias mapping changed
      x86/mm: don't set kernel_set_to_readonly when write protecting fails
      x86/mm/pat: don't populate page tables in set_memory_{en,de}crypted()
      x86/mm/pat: don't BUG() on inconsistent page count
      x86/mm/pat: don't warn about W^X violations before mark_rodata_ro()
      x86/mm/pat: remove CPA_ARRAY
      x86/mm/pat: pass the address to CPA by value
      x86/mm/pat: move the collapse of large pages out of cpa_flush()
      x86/mm/pat: use cpa_flush() on CPA errors

 arch/x86/mm/init_32.c        |   8 +-
 arch/x86/mm/init_64.c        |   8 +-
 arch/x86/mm/pat/cpa-test.c   |  15 ++--
 arch/x86/mm/pat/set_memory.c | 203 +++++++++++++++++++------------------------
 4 files changed, 108 insertions(+), 126 deletions(-)
---
base-commit: 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4
change-id: 20261112-fixes-x86-0c15b6adc212

--
Sincerely yours,
Mike.