linux-kernel - Re: [PATCH v9 7/8] x86/cpu: Support AMD Automatic IBRS

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Date:   Fri, 24 Feb 2023 13:35:22 -0800
From:   Josh Poimboeuf <jpoimboe@...nel.org>
To:     Borislav Petkov <bp@...en8.de>
Cc:     Kim Phillips <kim.phillips@....com>, x86@...nel.org,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
        Joao Martins <joao.m.martins@...cle.com>,
        Jonathan Corbet <corbet@....net>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        David Woodhouse <dwmw@...zon.co.uk>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Juergen Gross <jgross@...e.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Tony Luck <tony.luck@...el.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Alexey Kardashevskiy <aik@....com>, kvm@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v9 7/8] x86/cpu: Support AMD Automatic IBRS

On Fri, Feb 24, 2023 at 10:08:32PM +0100, Borislav Petkov wrote:
> On Fri, Feb 24, 2023 at 10:52:57AM -0800, Josh Poimboeuf wrote:
> > Doesn't this only enable it on the boot CPU?
> 
> Whoops, you might be right.
> 
> Lemme fix it.
> 
> Thx!

BTW, I wasn't copied on the patch set, despite having dedicated years of
my life that file ;-)

Can we add bugs.c and friends to MAINTAINERS?

---8<---

From: Josh Poimboeuf <jpoimboe@...nel.org>
Subject: [PATCH] MAINTAINERS: Add x86 hardware vulnerabilities section

Signed-off-by: Josh Poimboeuf <jpoimboe@...nel.org>
---
 MAINTAINERS | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index eb6f650c6c0b..338dc7469f80 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -22553,6 +22553,16 @@ S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/asm
 F:	arch/x86/entry/
 
+X86 HARDWARE VULNERABILITIES
+M:	Thomas Gleixner <tglx@...utronix.de>
+M:	Borislav Petkov <bp@...en8.de>
+M:	Peter Zijlstra <peterz@...radead.org>
+M:	Josh Poimboeuf <jpoimboe@...nel.org>
+S:	Maintained
+F:	Documentation/admin-guide/hw-vuln/
+F:	arch/x86/include/asm/nospec-branch.h
+F:	arch/x86/kernel/cpu/bugs.c
+
 X86 MCE INFRASTRUCTURE
 M:	Tony Luck <tony.luck@...el.com>
 M:	Borislav Petkov <bp@...en8.de>
-- 
2.39.1