linux-kernel - Re: [PATCH v2 04/14] arm64: kvm: Add build rules for separate nVHE object files

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Message-ID: <20200518164254.b26ankme6pb6ijqr@dbrazdil-macbookpro.roam.corp.google.com>
Date:   Mon, 18 May 2020 17:42:54 +0100
From:   David Brazdil <dbrazdil@...gle.com>
To:     Andrew Scull <ascull@...gle.com>
Cc:     David Brazdil <dbrazdil@...gle.com>,
        Catalin Marinas <catalin.marinas@....com>,
        James Morse <james.morse@....com>,
        Julien Thierry <julien.thierry.kdev@...il.com>,
        Marc Zyngier <maz@...nel.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Will Deacon <will@...nel.org>, kvmarm@...ts.cs.columbia.edu,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 04/14] arm64: kvm: Add build rules for separate nVHE
 object files

On Mon, May 18, 2020 at 04:55:53PM +0100, Andrew Scull wrote:
> On Fri, May 15, 2020 at 11:58:31AM +0100, David Brazdil wrote:
> > diff --git a/arch/arm64/kernel/image-vars.h b/arch/arm64/kernel/image-vars.h
> > index 7f06ad93fc95..13850134fc28 100644
> > --- a/arch/arm64/kernel/image-vars.h
> > +++ b/arch/arm64/kernel/image-vars.h
> > @@ -51,4 +51,16 @@ __efistub__ctype		= _ctype;
> >  
> >  #endif
> >  
> > +#ifdef CONFIG_KVM
> > +
> > +/*
> > + * KVM nVHE code has its own symbol namespace prefixed by __hyp_text_, to
> > + * isolate it from the kernel proper. The following symbols are legally
> > + * accessed by it, therefore provide aliases to make them linkable.
> > + * Do not include symbols which may not be safely accessed under hypervisor
> > + * memory mappings.
> > + */
> 
> nit: the prefix is not '__kvm_nvhe_' rather than '__hyp_text_'

Thanks, will fix in v3.