linux-kernel - [PATCH 0/3] x86/bugs: BHI fixes / improvements

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Date: Fri, 12 Apr 2024 11:10:31 -0700
From: Josh Poimboeuf <jpoimboe@...nel.org>
To: x86@...nel.org
Cc: linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Daniel Sneddon <daniel.sneddon@...ux.intel.com>,
	Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Alexandre Chartre <alexandre.chartre@...cle.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Sean Christopherson <seanjc@...gle.com>,
	Andrew Cooper <andrew.cooper3@...rix.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Nikolay Borisov <nik.borisov@...e.com>,
	KP Singh <kpsingh@...nel.org>,
	Waiman Long <longman@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Ingo Molnar <mingo@...nel.org>
Subject: [PATCH 0/3] x86/bugs: BHI fixes / improvements - round 2

BHI fixes round 2:

- An updated version of "Only harden syscalls when needed" with review
  comments addressed

- A BHI retpoline check fix

- Remove the obsolete LFENCE "retpolines"

Josh Poimboeuf (3):
  x86/bugs: Only harden syscalls when needed
  x86/bugs: Fix BHI retpoline check
  x86/bugs: Remove support for Spectre v2 LFENCE "retpolines"

 arch/x86/Makefile                             |  1 -
 arch/x86/entry/common.c                       | 15 +++-
 arch/x86/entry/syscall_32.c                   | 11 +--
 arch/x86/entry/syscall_64.c                   |  6 --
 arch/x86/entry/syscall_x32.c                  |  7 +-
 arch/x86/include/asm/cpufeatures.h            |  2 +-
 arch/x86/include/asm/disabled-features.h      |  3 +-
 arch/x86/include/asm/nospec-branch.h          | 18 +---
 arch/x86/include/asm/syscall.h                |  8 +-
 arch/x86/kernel/alternative.c                 | 17 +---
 arch/x86/kernel/cpu/bugs.c                    | 88 +++++++------------
 arch/x86/kernel/cpu/cpu.h                     |  3 +-
 arch/x86/lib/retpoline.S                      |  5 +-
 arch/x86/net/bpf_jit_comp.c                   |  5 +-
 tools/arch/x86/include/asm/cpufeatures.h      |  1 -
 .../arch/x86/include/asm/disabled-features.h  |  3 +-
 16 files changed, 69 insertions(+), 124 deletions(-)

-- 
2.44.0