- 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.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-----BEGIN PGP SIGNATURE-----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=KlDX
-----END PGP SIGNATURE-----
Merge tag 'x86-urgent-2026-03-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
- 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
- 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
* tag 'x86-urgent-2026-03-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/entry/vdso32: Work around libgcc unwinder bug
x86/resctrl: Fix SNC detection
x86/topo: Fix SNC topology mess
x86/topo: Replace x86_has_numa_in_package
x86/topo: Add topology_num_nodes_per_package()
x86/numa: Store extra copy of numa_nodes_parsed
x86/boot: Handle relative CONFIG_EFI_SBAT_FILE file paths
x86/sev: Allow IBPB-on-Entry feature for SNP guests
x86/boot/sev: Move SEV decompressor variables into the .data section
c23719abc3