Re: [PATCH v2 1/6] x86/bugs: Add asm helpers for executing VERW

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Subject: Re: [PATCH v2 1/6] x86/bugs: Add asm helpers for executing VERW
From: Pawan Gupta <pawan.kumar.gupta@xxxxxxxxxxxxxxx>
Date: Wed, 25 Oct 2023 08:10:01 -0700
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, x86@xxxxxxxxxx, "H. Peter Anvin" <hpa@xxxxxxxxx>, Josh Poimboeuf <jpoimboe@xxxxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxx>, Jonathan Corbet <corbet@xxxxxxx>, Sean Christopherson <seanjc@xxxxxxxxxx>, Paolo Bonzini <pbonzini@xxxxxxxxxx>, tony.luck@xxxxxxxxx, ak@xxxxxxxxxxxxxxx, tim.c.chen@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-doc@xxxxxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, Alyssa Milburn <alyssa.milburn@xxxxxxxxxxxxxxx>, Daniel Sneddon <daniel.sneddon@xxxxxxxxxxxxxxx>, antonio.gomez.iglesias@xxxxxxxxxxxxxxx, Alyssa Milburn <alyssa.milburn@xxxxxxxxx>
In-reply-to: <20231025065818.GB31201@noisy.programming.kicks-ass.net>
References: <20231024-delay-verw-v2-0-f1881340c807@linux.intel.com> <20231024-delay-verw-v2-1-f1881340c807@linux.intel.com> <20231024103601.GH31411@noisy.programming.kicks-ass.net> <20231025040029.uglv4dwmlnfhcjde@desk> <20231025065818.GB31201@noisy.programming.kicks-ass.net>

On Wed, Oct 25, 2023 at 08:58:18AM +0200, Peter Zijlstra wrote:
> > +.pushsection .rodata
> > +.align 64
> > +mds_verw_sel:
> > +	.word __KERNEL_DS
> > + 	.byte 0xcc
> > +.align 64
> > +.popsection
> 
> This should not be in a header file, you'll get an instance of this per
> translation unit, not what you want.

Agh, sorry I missed it.

References:
- [PATCH v2 0/6] Delay VERW
  - From: Pawan Gupta
- [PATCH v2 1/6] x86/bugs: Add asm helpers for executing VERW
  - From: Pawan Gupta
- Re: [PATCH v2 1/6] x86/bugs: Add asm helpers for executing VERW
  - From: Peter Zijlstra
- Re: [PATCH v2 1/6] x86/bugs: Add asm helpers for executing VERW
  - From: Pawan Gupta
- Re: [PATCH v2 1/6] x86/bugs: Add asm helpers for executing VERW
  - From: Peter Zijlstra

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