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Date: Wed, 19 Jul 2017 15:33:13 -0700
From: "H. Peter Anvin" <hpa@...or.com>
To: Thomas Garnier <thgarnie@...gle.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S . Miller" <davem@...emloft.net>,
        Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>, Arnd Bergmann <arnd@...db.de>,
        Matthias Kaehlcke <mka@...omium.org>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Juergen Gross
 <jgross@...e.com>, Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Joerg Roedel <joro@...tes.org>, Andy Lutomirski <luto@...nel.org>,
        Borislav Petkov <bp@...en8.de>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        Brian Gerst <brgerst@...il.com>, Borislav Petkov <bp@...e.de>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
        Tejun Heo <tj@...nel.org>, Christoph Lameter <cl@...ux.com>,
        Kees Cook <keescook@...omium.org>,
        Paul Gortmaker <paul.gortmaker@...driver.com>,
        Chris Metcalf <cmetcalf@...lanox.com>,
        "Paul E . McKenney" <paulmck@...ux.vnet.ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Christopher Li <sparse@...isli.org>,
        Dou Liyang <douly.fnst@...fujitsu.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Markus Trippelsdorf <markus@...ppelsdorf.de>,
        Peter Foley <pefoley2@...oley.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Matthew Wilcox <mawilcox@...rosoft.com>,
        Michal Hocko <mhocko@...e.com>, Rob Landley <rob@...dley.net>,
        Jiri Kosina <jkosina@...e.cz>, "H . J . Lu" <hjl.tools@...il.com>,
        Paul Bolle <pebolle@...cali.nl>, Baoquan He <bhe@...hat.com>,
        Daniel Micay <danielmicay@...il.com>
Cc: x86@...nel.org, linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        xen-devel@...ts.xenproject.org, kvm@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-arch@...r.kernel.org,
        linux-sparse@...r.kernel.org, kernel-hardening@...ts.openwall.com
Subject: Re: [RFC 20/22] x86/relocs: Add option to generate 64-bit relocations

On 07/18/17 15:33, Thomas Garnier wrote:
> The x86 relocation tool generates a list of 32-bit signed integers. There
> was no need to use 64-bit integers because all addresses where above the 2G
> top of the memory.
> 
> This change add a large-reloc option to generate 64-bit unsigned integers.
> It can be used when the kernel plan to go below the top 2G and 32-bit
> integers are not enough.

Why on Earth?  This would only be necessary if the *kernel itself* was
more than 2G, which isn't going to happen for the forseeable future.

	-hpa

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