[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-2026-03-29

for you to fetch changes up to a3e93cac25316aad03bf561e3c205f4ca0b8f452:

Miscellaneous x86 fixes:

 - Fix an early boot crash in AMD SEV-SNP guests, caused by incorrect
   FSGSBASE init ordering. (Nikunj A Dadhania)

 - Remove X86_CR4_FRED from the CR4 pinned bits mask, to fix a race
   window during the bootup of SEV-{ES,SNP} or TDX guests, which
   can crash them if they trigger exceptions in that window.
   (Borislav Petkov)

 - Fix early boot failures on SEV-ES/SNP guests, due to incorrect
   early GHCB access. (Nikunj A Dadhania)

 - Add clarifying comment to the CRn pinning logic, to avoid
   future confusion & bugs. (Peter Zijlstra)

 Thanks,

	Ingo

------------------>
Borislav Petkov (AMD) (1):
      x86/cpu: Remove X86_CR4_FRED from the CR4 pinned bits mask

Nikunj A Dadhania (2):
      x86/cpu: Enable FSGSBASE early in cpu_init_exception_handling()
      x86/fred: Fix early boot failures on SEV-ES/SNP guests

Peter Zijlstra (1):
      x86/cpu: Add comment clarifying CRn pinning


 arch/x86/coco/sev/noinstr.c  |  6 ++++++
 arch/x86/entry/entry_fred.c  | 14 ++++++++++++++
 arch/x86/kernel/cpu/common.c | 33 ++++++++++++++++++++++++++-------
 3 files changed, 46 insertions(+), 7 deletions(-)