[GIT PULL] x86 fixes

[Ingo Molnar]

Linus,

Please pull the latest x86/urgent Git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-urgent-2026-03-08

for you to fetch changes up to b5ef09a77d0b5213268300eedd8a7d28b4e92d47:

Miscellaneous x86 fixes:

 - Fix SEV guest boot failures in certain circumstances, due
   to very early code relying on a BSS-zeroed variable that
   isn't actually zeroed yet an may contain non-zero bootup
   values. Move the variable into the .data section go gain
   even earlier zeroing.

 - Expose & allow the IBPB-on-Entry feature on SNP guests,
   which was not properly exposed to guests due to initial
   implementational caution.

 - Fix O= build failure when CONFIG_EFI_SBAT_FILE is using
   relative file paths.

 - 4 commits to fix the various SNC (Sub-NUMA Clustering)
   topology enumeration bugs/artifacts (sched-domain build
   errors mostly). SNC enumeration data got more complicated
   with Granite Rapids X (GNR) and Clearwater Forest X (CWF),
   which exposed these bugs and made their effects more
   serious.

 - Also use the now sane(r) SNC code to fix resctrl SNC
   detection bugs.

 - Work around a historic libgcc unwinder bug in the vdso32
   sigreturn code (again), which regressed during an overly
   aggressive recent cleanup of DWARF annotations.

 Thanks,

	Ingo

------------------>
H. Peter Anvin (1):
      x86/entry/vdso32: Work around libgcc unwinder bug

Jan Stancek (1):
      x86/boot: Handle relative CONFIG_EFI_SBAT_FILE file paths

Kim Phillips (1):
      x86/sev: Allow IBPB-on-Entry feature for SNP guests

Peter Zijlstra (4):
      x86/numa: Store extra copy of numa_nodes_parsed
      x86/topo: Add topology_num_nodes_per_package()
      x86/topo: Replace x86_has_numa_in_package
      x86/topo: Fix SNC topology mess

Tom Lendacky (1):
      x86/boot/sev: Move SEV decompressor variables into the .data section

Tony Luck (1):
      x86/resctrl: Fix SNC detection


 arch/x86/boot/compressed/Makefile      |   1 +
 arch/x86/boot/compressed/sev.c         |   9 +-
 arch/x86/boot/startup/sev-shared.c     |   2 +-
 arch/x86/coco/sev/core.c               |   1 +
 arch/x86/entry/vdso/vdso32/sigreturn.S |  30 +++++
 arch/x86/include/asm/msr-index.h       |   5 +-
 arch/x86/include/asm/numa.h            |   6 +
 arch/x86/include/asm/topology.h        |   6 +
 arch/x86/kernel/cpu/common.c           |   3 +
 arch/x86/kernel/cpu/resctrl/monitor.c  |  36 +-----
 arch/x86/kernel/cpu/topology.c         |  13 ++-
 arch/x86/kernel/smpboot.c              | 201 ++++++++++++++++++++++++---------
 arch/x86/mm/numa.c                     |   8 ++
 arch/x86/mm/srat.c                     |   2 +
 14 files changed, 228 insertions(+), 95 deletions(-)