linux-kernel - [GIT PULL] x86 fixes

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Message-ID: <ZlweciPk77ra9W7H@gmail.com>
Date: Sun, 2 Jun 2024 09:25:38 +0200
From: Ingo Molnar <mingo@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org
Subject: [GIT PULL] x86 fixes

Linus,

Please pull the latest x86/urgent Git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-urgent-2024-06-02

   # HEAD: 0c2f6d04619ec2b53ad4b0b591eafc9389786e86 x86/topology/intel: Unlock CPUID before evaluating anything

Miscellaneous topology parsing fixes:

 - Fix topology parsing regression on older CPUs in the
   new AMD/Hygon parser

 - Fix boot crash on odd Intel Quark and similar CPUs that
   do not fill out cpuinfo_x86::x86_clflush_size and zero out
   cpuinfo_x86::x86_cache_alignment as a result. Provide
   32 bytes as a general fallback value.

 - Fix topology enumeration on certain rare CPUs where the
   BIOS locks certain CPUID leaves and the kernel unlocked
   them late, which broke with the new topology parsing code.
   Factor out this unlocking logic and move it earlier
   in the parsing sequence.

 Thanks,

	Ingo

------------------>
Dave Hansen (1):
      x86/cpu: Provide default cache line size if not enumerated

Thomas Gleixner (2):
      x86/topology/amd: Evaluate SMT in CPUID leaf 0x8000001e only on family 0x17 and greater
      x86/topology/intel: Unlock CPUID before evaluating anything


 arch/x86/kernel/cpu/common.c       |  7 ++++++-
 arch/x86/kernel/cpu/cpu.h          |  2 ++
 arch/x86/kernel/cpu/intel.c        | 25 ++++++++++++++++---------
 arch/x86/kernel/cpu/topology_amd.c |  4 ++--
 4 files changed, 26 insertions(+), 12 deletions(-)