linux-kernel - Re: [PATCH RFC V2 02/17] x86/fpu: Refactor arch_set_user_pkey

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: <20200720091435.GM10769@hirez.programming.kicks-ass.net>
Date:   Mon, 20 Jul 2020 11:14:35 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Ira Weiny <ira.weiny@...el.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Andy Lutomirski <luto@...nel.org>,
        Fenghua Yu <fenghua.yu@...el.com>, x86@...nel.org,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-nvdimm@...ts.01.org, linux-fsdevel@...r.kernel.org,
        linux-mm@...ck.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH RFC V2 02/17] x86/fpu: Refactor
 arch_set_user_pkey_access() for PKS support

On Fri, Jul 17, 2020 at 01:52:55PM -0700, Ira Weiny wrote:
> On Fri, Jul 17, 2020 at 10:54:42AM +0200, Peter Zijlstra wrote:

> > Then we at least have a little clue wtf the thing does.. Yes I started
> > with a rename and then got annoyed at the implementation too.
> 
> On the code I think this is fair.  I've also updated the calling function to be
> a bit cleaner as well.
> 
> However, I think the name 'update' is a bit misleading.  Here is the new
> calling code:
> 
> ...
>         pkru = read_pkru();
> 	pkru = update_pkey_reg(pkru, pkey, init_val);
> 	write_pkru(pkru);
> ...
> 
> 
> I think it is odd to have a function called update_pkey_reg() called right
> before a write_pkru().  Can we call this update_pkey_value?  or just 'val'?
> Because write_pkru() actually updates the register.

Fair enough, update_pkey_val() works fine for me.