linux-kernel - [Patch V1 0/7] x86/microcode: Some cleanups and fixes for microcode

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Date:   Tue, 29 Nov 2022 13:08:25 -0800
From:   Ashok Raj <ashok.raj@...el.com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     X86-kernel <x86@...nel.org>,
        LKML Mailing List <linux-kernel@...r.kernel.org>,
        Ashok Raj <ashok.raj@...el.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Tony Luck <tony.luck@...el.com>, alison.schofield@...el.com,
        reinette.chatre@...el.com
Subject: [Patch V1 0/7] x86/microcode: Some cleanups and fixes for microcode

Hi Boris

These are based on tip/x86/microcode after the recent IFS merge. 

As discussed in IRC, feel free to massage/rework/re-organize them in a way
that you intend to see them. 

Patch1: Fixes a minor race in pr_info due to a recent change in
	microcode_init() sequence.

Patch2: Remove microcode apply retries that cause a hang when loading
	fails.

Patch3: Prep patch for patch4, since its only used in core.c make it local
	there.

Patch4: Take a snapshot of x86 features before and after microcode update,
	instead of using the one from boot_cpu already cached.

Patch5: prepare early print to simplify patch 6 and 7.

Patch6: Print old and new rev after early loading. Its useful to know what
	BIOS version of the patchrev was.

Patch7: Print a message when early loading fails. Currently there is no
	message to user.

Ashok Raj (7):
  x86/microcode/intel: Remove redundant microcode rev pr_info()s
  x86/microcode/intel: Remove retries on early microcode load
  x86/microcode/core: Move microcode_check() to cpu/microcode/core.c
  x86/microcode/core: Take a snapshot before and after applying
    microcode
  x86/microcode/intel: Prepare the print_ucode_rev to simply take a rev
    to print
  x86/microcode/intel: Print old and new rev during early boot
  x86/microcode/intel: Print when early microcode loading fails

 arch/x86/include/asm/processor.h      |  3 +-
 arch/x86/kernel/cpu/cpu.h             |  1 -
 arch/x86/kernel/cpu/common.c          | 32 -------------
 arch/x86/kernel/cpu/microcode/core.c  | 49 +++++++++++++++++++-
 arch/x86/kernel/cpu/microcode/intel.c | 67 +++++++++++----------------
 5 files changed, 75 insertions(+), 77 deletions(-)


base-commit: 1a63b58082869273bfbab1b945007193f7bd3a78
-- 
2.34.1