linux-kernel - Re: [PATCH v4 06/39] x86/fpu: Add helper for modifying xstate

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <Y6Lgcs4PaKLB7eT7@zn.tnic>
Date:   Wed, 21 Dec 2022 11:31:14 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>
Cc:     "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
        "kcc@...gle.com" <kcc@...gle.com>,
        "Lutomirski, Andy" <luto@...nel.org>,
        "nadav.amit@...il.com" <nadav.amit@...il.com>,
        "kirill.shutemov@...ux.intel.com" <kirill.shutemov@...ux.intel.com>,
        "Schimpe, Christina" <christina.schimpe@...el.com>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "corbet@....net" <corbet@....net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "jannh@...gle.com" <jannh@...gle.com>,
        "dethoma@...rosoft.com" <dethoma@...rosoft.com>,
        "x86@...nel.org" <x86@...nel.org>, "pavel@....cz" <pavel@....cz>,
        "rdunlap@...radead.org" <rdunlap@...radead.org>,
        "linux-api@...r.kernel.org" <linux-api@...r.kernel.org>,
        "john.allen@....com" <john.allen@....com>,
        "arnd@...db.de" <arnd@...db.de>,
        "jamorris@...ux.microsoft.com" <jamorris@...ux.microsoft.com>,
        "rppt@...nel.org" <rppt@...nel.org>,
        "bsingharora@...il.com" <bsingharora@...il.com>,
        "mike.kravetz@...cle.com" <mike.kravetz@...cle.com>,
        "oleg@...hat.com" <oleg@...hat.com>,
        "fweimer@...hat.com" <fweimer@...hat.com>,
        "keescook@...omium.org" <keescook@...omium.org>,
        "gorcunov@...il.com" <gorcunov@...il.com>,
        "andrew.cooper3@...rix.com" <andrew.cooper3@...rix.com>,
        "hpa@...or.com" <hpa@...or.com>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "hjl.tools@...il.com" <hjl.tools@...il.com>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "Syromiatnikov, Eugene" <esyr@...hat.com>,
        "Yang, Weijiang" <weijiang.yang@...el.com>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        "Eranian, Stephane" <eranian@...gle.com>
Subject: Re: [PATCH v4 06/39] x86/fpu: Add helper for modifying xstate

On Wed, Dec 21, 2022 at 12:03:39AM +0000, Edgecombe, Rick P wrote:
> Sorry about this and the others. I get spelling errors in checkpatch,
> so I must have dictionary issues or something.

No worries, happens to everyone.

> Yes, the KVM series needed it. Part of the reasoning here was to
> provide some helpers to avoid mistakes in modifying xstate, so the
> general idea was that it should be available. I suppose that series
> could add the export though?

Yeah, you do have a point. Preemptive exposure of functionality is not
really needed, so yeah, let's add it when actually really needed.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette