[GIT PULL] x86 fixes and updates

[Ingo Molnar <mingo@kernel.org>]

Linus,

Please pull the latest x86/urgent Git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-urgent-2025-03-28

   # HEAD: 31ab12df723543047c3fc19cb8f8c4498ec6267f x86/microcode/AMD: Fix __apply_microcode_amd()'s return value

Merge note, one of the fixes touches core kernel code non-trivially:

  out-of-topic modifications in x86-urgent-2025-03-28:
  ------------------------------------------------------
  include/linux/pgtable.h            # dc84bc2aba85: x86/mm/pat: Fix VM_PAT handl
  mm/memory.c                        # dc84bc2aba85: x86/mm/pat: Fix VM_PAT handl
  kernel/fork.c                      # dc84bc2aba85: x86/mm/pat: Fix VM_PAT handl

Miscellaneous x86 fixes and updates:

 - Fix a large number of x86 Kconfig dependency and help text accuracy
   bugs/problems, by Mateusz Jończyk and David Heideberg.

 - Fix a VM_PAT interaction with fork() crash. This also touches
   core kernel code.

 - Fix an ORC unwinder bug for interrupt entries

 - Fixes and cleanups.

 - Fix an AMD microcode loader bug that can promote verification failures
   into success.

 - Add early-printk support for MMIO based UARTs on an x86 board that
   had no other serial debugging facility and also experienced early
   boot crashes.

 Thanks,

	Ingo

------------------>
Boris Ostrovsky (1):
      x86/microcode/AMD: Fix __apply_microcode_amd()'s return value

Chao Gao (1):
      x86/fpu: Update the outdated comment above fpstate_init_user()

David Hildenbrand (1):
      x86/mm/pat: Fix VM_PAT handling when fork() fails in copy_page_range()

Denis Mukhin (1):
      x86/early_printk: Add support for MMIO-based UARTs

Jann Horn (2):
      x86/entry: Fix ORC unwinder for PUSH_REGS with save_ret=1
      x86/dumpstack: Fix inaccurate unwinding from exception stacks due to misplaced assignment

Mateusz Jończyk (9):
      x86/Kconfig: Enable X86_X2APIC by default and improve help text
      x86/Kconfig: Always enable ARCH_SPARSEMEM_ENABLE
      x86/Kconfig: Move all X86_EXTENDED_PLATFORM options together
      x86/Kconfig: Update lists in X86_EXTENDED_PLATFORM
      x86/Kconfig: Document CONFIG_PCI_MMCONFIG
      x86/Kconfig: Make CONFIG_PCI_CNB20LE_QUIRK depend on X86_32
      x86/Kconfig: Document release year of glibc 2.3.3
      x86/Kconfig: Correct X86_X2APIC help text
      x86/Kconfig: Fix lists in X86_EXTENDED_PLATFORM help text

Pawan Gupta (1):
      x86/speculation: Remove the extra #ifdef around CALL_NOSPEC


 Documentation/admin-guide/kernel-parameters.txt |  9 ++-
 arch/x86/Kconfig                                | 83 +++++++++++++++++--------
 arch/x86/entry/calling.h                        |  2 +
 arch/x86/include/asm/nospec-branch.h            |  4 --
 arch/x86/kernel/cpu/microcode/amd.c             |  2 +-
 arch/x86/kernel/dumpstack.c                     |  5 +-
 arch/x86/kernel/early_printk.c                  | 45 +++++++++++++-
 arch/x86/kernel/fpu/core.c                      |  2 +-
 arch/x86/mm/pat/memtype.c                       | 52 +++++++++-------
 include/linux/pgtable.h                         | 28 +++++++--
 kernel/fork.c                                   |  4 ++
 mm/memory.c                                     | 11 ++--
 12 files changed, 172 insertions(+), 75 deletions(-)