From: Borislav Petkov <bp@suse.de>
To: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>,
x86@kernel.org, gregkh@linuxfoundation.org,
david.vrabel@citrix.com, stable@vger.kernel.org,
rshendershot@mchsi.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3.17 100/141] x86, microcode: Fix accessing dis_ucode_ldr on 32-bit
Date: Thu, 27 Nov 2014 17:36:39 +0100 [thread overview]
Message-ID: <20141127163639.GJ4828@pd.tnic> (raw)
In-Reply-To: <20141127162118.GA24829@konrad-lan.dumpdata.com>
On Thu, Nov 27, 2014 at 11:21:19AM -0500, Konrad Rzeszutek Wilk wrote:
> > Ok, but let's have a clean design: maybe have a weak default stub which
> > returns false when PARAVIRT is not enabled in the .config and then add
> > an override in, say, arch/x86/kernel/paravirt.c which returns true when
> > running as a guest. Something like that, at least.
>
> You are describing 'paravirt_enabled()' :-)
Haha.
Although I have a suspicion this won't work either because we're loading
microcode very early on 32-bit, before paging has been enabled, and
accessing pv_info.paravirt_enabled will probably go boom. AFAICT, from a
quick glance.
--
Regards/Gruss,
Boris.
Sent from a fat crate under my desk. Formatting is fine.
--
next prev parent reply other threads:[~2014-11-27 16:36 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-27 3:13 Boris Ostrovsky
2014-11-27 9:12 ` Borislav Petkov
2014-11-27 16:21 ` Konrad Rzeszutek Wilk
2014-11-27 16:36 ` Borislav Petkov [this message]
-- strict thread matches above, loose matches on Subject: below --
2014-11-27 23:33 Boris Ostrovsky
2014-11-27 17:14 Boris Ostrovsky
2014-11-27 17:20 ` Borislav Petkov
2014-11-19 20:50 [PATCH 3.17 000/141] 3.17.4-stable review Greg Kroah-Hartman
2014-11-19 20:52 ` [PATCH 3.17 100/141] x86, microcode: Fix accessing dis_ucode_ldr on 32-bit Greg Kroah-Hartman
2014-11-25 18:12 ` Boris Ostrovsky
2014-11-25 18:24 ` Borislav Petkov
2014-11-25 18:43 ` Boris Ostrovsky
2014-11-25 18:43 ` Borislav Petkov
2014-11-25 18:55 ` Boris Ostrovsky
2014-11-25 19:03 ` Borislav Petkov
2014-11-25 19:23 ` Boris Ostrovsky
2014-11-25 19:08 ` Borislav Petkov
2014-11-25 19:28 ` Boris Ostrovsky
2014-11-25 20:26 ` Borislav Petkov
2014-11-25 20:36 ` Konrad Rzeszutek Wilk
2014-11-25 21:17 ` Borislav Petkov
2014-11-25 21:59 ` Boris Ostrovsky
2014-11-25 22:18 ` Borislav Petkov
2014-11-26 5:00 ` Boris Ostrovsky
2014-11-26 10:55 ` Borislav Petkov
2014-11-26 12:39 ` boris ostrovsky
2014-11-26 14:44 ` Borislav Petkov
2014-11-25 18:45 ` Greg Kroah-Hartman
2014-11-25 18:47 ` Borislav Petkov
2014-11-25 18:50 ` Boris Ostrovsky
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