From mboxrd@z Thu Jan  1 00:00:00 1970
From: Borislav Petkov <bp@alien8.de>
Subject: Re: [Xen-devel] [PATCH v2 3/3] paravirt: rename paravirt_enabled to
 paravirt_legacy
Date: Mon, 8 Feb 2016 17:52:27 +0100
Message-ID: <20160208165227.GL28980@pd.tnic>
References: <CALCETrWSiN+te_0aYH0NH9oBzGALLhKqxkupiGwbAm2GdCNyVQ@mail.gmail.com>
 <20160206220437.GA4435@pd.tnic>
 <56B8B6BF.6030007@oracle.com>
 <20160208155507.GF28980@pd.tnic>
 <56B8BCDB.9040701@citrix.com>
 <56B8BE58.6070003@oracle.com>
 <56B8C1BC.9040603@citrix.com>
 <56B8C2C8.8050406@oracle.com>
 <20160208163526.GI28980@pd.tnic>
 <56B8C52C.1070301@oracle.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Return-path: <linux-kernel-owner@vger.kernel.org>
Content-Disposition: inline
In-Reply-To: <56B8C52C.1070301@oracle.com>
Sender: linux-kernel-owner@vger.kernel.org
To: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>, X86 ML <x86@kernel.org>, david.e.box@intel.com, Andrey Ryabinin <ryabinin.a.a@gmail.com>, Lv Zheng <lv.zheng@intel.com>, Jan Beulich <JBeulich@suse.com>, "H. Peter Anvin" <hpa@zytor.com>, qiuxishi@huawei.com, cocci@systeme.lip6.fr, Xen Devel <xen-devel@lists.xensource.com>, Joerg Roedel <joro@8bytes.org>, "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>, Robert Moore <robert.moore@intel.com>, Ingo Molnar <mingo@redhat.com>, Andrey Ryabinin <aryabinin@virtuozzo.com>, Mauro Carvalho Chehab <mchehab@osg.samsung.com>, "Luis R. Rodriguez" <mcgrof@suse.com>, Rusty Russell <rusty@rustcorp.com.au>, Thomas Gleixner <tglx@linutronix.de>, mcb30@ipxe.org, Juergen Gross <jgross@suse.com>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Andy Lutomirski <luto@amacapital.net>, "Luis R. Rodriguez" <mcgrof@kernel.org>, long.wan
List-Id: xen-devel@lists.xenproject.org

On Mon, Feb 08, 2016 at 11:41:16AM -0500, Boris Ostrovsky wrote:
> Keep in mind that Xen PV doesn't go through startup_32|64(). It starts at
> xen_start_kernel (save for a small stub before that), which sets pvops.  It
> "joins" regular/baremetal code in
> i386_start_kernel/x86_64_start_reservation().

Ah, so one more reason not to do the CPUID thing for the early loader.

So it's up to you how to replace that paravirt_enabled() thing - CPUID
or test static_cpu_has(X86_FEATURE_XENPV)...

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.