linux-kernel - Re: [PATCH v2 1/2] x86/boot/32: Delete cpuinfo_x86::wp_works

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Message-ID: <20170329202026.4t5va6plsepdefpf@pd.tnic>
Date:   Wed, 29 Mar 2017 22:20:27 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Andy Lutomirski <luto@...nel.org>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Juergen Gross <jgross@...e.com>,
        Thomas Garnier <thgarnie@...gle.com>
Subject: Re: [PATCH v2 1/2] x86/boot/32: Delete cpuinfo_x86::wp_works_ok

On Wed, Mar 29, 2017 at 09:48:41AM -0700, Andy Lutomirski wrote:
> Linux refuses to boot if WP doesn't work okay, so tracking whether
> it works serves no purpose.  The only use I can see at all for wp_works_ok
> is that it lets Xen bypass test_wp_bit().  If this is truly needed,
> it could be more cleanly handled using X86_FEATURE_XENPV, but it
> looks like Xen can handle test_wp_bit() correctly without special
> cases at all.
> 
> Signed-off-by: Andy Lutomirski <luto@...nel.org>

https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=6415813bae75feba10b8ca3ed6634a72c2a4d313

What's up?

-- 
Regards/Gruss,
    Boris.

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