[PATCH 0/7] x86/bugs: BHI fixes / improvements

From: Josh Poimboeuf <jpoimboe@kernel.org>
To: x86@kernel.org
Cc: linux-kernel@vger.kernel.org,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Daniel Sneddon <daniel.sneddon@linux.intel.com>,
	Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Alexandre Chartre <alexandre.chartre@oracle.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Sean Christopherson <seanjc@google.com>,
	Andrew Cooper <andrew.cooper3@citrix.com>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Nikolay Borisov <nik.borisov@suse.com>,
	KP Singh <kpsingh@kernel.org>, Waiman Long <longman@redhat.com>,
	Borislav Petkov <bp@alien8.de>
Subject: [PATCH 0/7] x86/bugs: BHI fixes / improvements
Date: Wed, 10 Apr 2024 22:40:44 -0700	[thread overview]
Message-ID: <cover.1712813475.git.jpoimboe@kernel.org> (raw)

An assortment of BHI fixes.

Josh Poimboeuf (7):
  x86/bugs: BHI documentation fixes
  x86/bugs: Cache the value of MSR_IA32_ARCH_CAPABILITIES
  x86/bugs: Fix BHI handling of RRSBA
  x86/bugs: Clarify that syscall hardening isn't a BHI mitigation
  x86/bugs: Only harden syscalls when needed
  x86/bugs: Remove CONFIG_BHI_MITIGATION_AUTO and spectre_bhi=auto
  x86/bugs: Replace CONFIG_SPECTRE_BHI_{ON,OFF} with
    CONFIG_MITIGATION_SPECTRE_BHI

 Documentation/admin-guide/hw-vuln/spectre.rst | 22 ++---
 .../admin-guide/kernel-parameters.txt         | 12 +--
 arch/x86/Kconfig                              | 22 +----
 arch/x86/entry/common.c                       | 30 +++++-
 arch/x86/entry/syscall_32.c                   | 11 +--
 arch/x86/entry/syscall_64.c                   |  8 +-
 arch/x86/entry/syscall_x32.c                  |  7 +-
 arch/x86/include/asm/cpufeatures.h            |  1 +
 arch/x86/include/asm/syscall.h                |  8 +-
 arch/x86/kernel/cpu/bugs.c                    | 98 +++++++++++--------
 10 files changed, 119 insertions(+), 100 deletions(-)

-- 
2.44.0