Received-SPF: pass (google.com: domain of linux-kernel+bounces-50608-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:40f1:3f00::1 as permitted sender) client-ip=2604:1380:40f1:3f00::1;
Date: Fri, 2 Feb 2024 13:31:32 -0800
From: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
To: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
	Borislav Petkov <bp@alien8.de>,
	Dave Hansen <dave.hansen@linux.intel.com>, x86@kernel.org,
	"H. Peter Anvin" <hpa@zytor.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Andy Lutomirski <luto@kernel.org>, Jonathan Corbet <corbet@lwn.net>,
	Sean Christopherson <seanjc@google.com>,
	Paolo Bonzini <pbonzini@redhat.com>, tony.luck@intel.com,
	ak@linux.intel.com, tim.c.chen@linux.intel.com,
	Andrew Cooper <andrew.cooper3@citrix.com>,
	Nikolay Borisov <nik.borisov@suse.com>,
	linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
	kvm@vger.kernel.org,
	Alyssa Milburn <alyssa.milburn@linux.intel.com>,
	Daniel Sneddon <daniel.sneddon@linux.intel.com>,
	antonio.gomez.iglesias@linux.intel.com,
	Alyssa Milburn <alyssa.milburn@intel.com>
Subject: Re: [PATCH  v6 1/6] x86/bugs: Add asm helpers for executing VERW
Message-ID: <20240202213132.kvdyz3dqqkzw7gox@desk>
References: <20240123-delay-verw-v6-0-a8206baca7d3@linux.intel.com>
 <20240123-delay-verw-v6-1-a8206baca7d3@linux.intel.com>
 <20240202032909.exegdxpgyndlkn2n@treble>
Precedence: bulk
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20240202032909.exegdxpgyndlkn2n@treble>

On Thu, Feb 01, 2024 at 07:29:09PM -0800, Josh Poimboeuf wrote:
> On Tue, Jan 23, 2024 at 11:41:01PM -0800, Pawan Gupta wrote:
> > index 4af140cf5719..79a7e81b9458 100644
> > --- a/arch/x86/include/asm/cpufeatures.h
> > +++ b/arch/x86/include/asm/cpufeatures.h
> > @@ -308,10 +308,10 @@
> >  #define X86_FEATURE_SMBA		(11*32+21) /* "" Slow Memory Bandwidth Allocation */
> >  #define X86_FEATURE_BMEC		(11*32+22) /* "" Bandwidth Monitoring Event Configuration */
> >  #define X86_FEATURE_USER_SHSTK		(11*32+23) /* Shadow stack support for user mode applications */
> > -
> >  #define X86_FEATURE_SRSO		(11*32+24) /* "" AMD BTB untrain RETs */
> >  #define X86_FEATURE_SRSO_ALIAS		(11*32+25) /* "" AMD BTB untrain RETs through aliasing */
> >  #define X86_FEATURE_IBPB_ON_VMEXIT	(11*32+26) /* "" Issue an IBPB only on VMEXIT */
> > +#define X86_FEATURE_CLEAR_CPU_BUF	(11*32+27) /* "" Clear CPU buffers using VERW */
> 
> This will need to be rebased.  And the "11*32" level is now full in
> Linus' tree, so this will presumably need to go to a different "level".

Yes, will send a new rebased version.