linux-kernel - [PATCH 0/2] x86/bugs: Updates to SSBD support on AMD

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Message-ID: <20180702213543.29202.79104.stgit@tlendack-t1.amdoffice.net>
Date:   Mon, 02 Jul 2018 16:35:43 -0500
From:   Tom Lendacky <thomas.lendacky@....com>
To:     x86@...nel.org, linux-kernel@...r.kernel.org
Cc:     Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bpetkov@...e.de>,
        David Woodhouse <dwmw@...zon.co.uk>
Subject: [PATCH 0/2] x86/bugs: Updates to SSBD support on AMD

These patches update the SSBD support on AMD processors.

The following patches are included in this series:
- In addition to checking the family, the check for the LS_CFG_SSBD
  feature only needs to done if both the AMD_SSBD and VIRT_SSBD features
  are not present.
- Since AMD can support more than one SSBD mitigation method, the check
  for when to use the SPEC_CTRL MSR for SSBD support needs to be more
  specific.  Explicitly check for the features that use the SPEC_CTRL MSR.

This patch series is based on tip:master.

---

Tom Lendacky (2):
      x86/bugs: Update when to check for the LS_CFG SSBD mitigation
      x86/bugs: Fix the AMD SSBD usage of the SPEC_CTRL MSR


 arch/x86/kernel/cpu/amd.c  |    4 +++-
 arch/x86/kernel/cpu/bugs.c |    8 +++++---
 2 files changed, 8 insertions(+), 4 deletions(-)

-- 
Tom Lendacky