From: Borislav Petkov <bp@alien8.de>
To: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: "Luis R. Rodriguez" <mcgrof@kernel.org>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
David Vrabel <david.vrabel@citrix.com>,
Andy Lutomirski <luto@amacapital.net>,
Juergen Gross <jgross@suse.com>, Michael Brown <mcb30@ipxe.org>,
Thomas Gleixner <tglx@linutronix.de>,
Andrey Ryabinin <aryabinin@virtuozzo.com>,
Joerg Roedel <joro@8bytes.org>,
Robert Moore <robert.moore@intel.com>,
Mauro Carvalho Chehab <mchehab@osg.samsung.com>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
Xen Devel <xen-devel@lists.xensource.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Rusty Russell <rusty@rustcorp.com.au>,
Jan Beulich <JBeulich@suse.com>, Lv Zheng <lv.zheng@intel.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
long.wanglong@huawei.com, Fengguang Wu <fengguang.wu@intel.com>,
qiuxishi@huawei.comAndrey Ryabinin <ryab>
Subject: Re: [PATCH v2 3/3] paravirt: rename paravirt_enabled to paravirt_legacy
Date: Wed, 17 Feb 2016 23:03:04 +0100 [thread overview]
Message-ID: <20160217220304.GP2023@pd.tnic> (raw)
In-Reply-To: <56C4E474.2070206@oracle.com>
On Wed, Feb 17, 2016 at 04:21:56PM -0500, Boris Ostrovsky wrote:
> That's exactly the point: if something is mapped it's an error for a
> non-PV kernel.
How would something be mapped there? __PAGE_OFFSET is
0xffff880000000000.
Or are you thinking about some insanely b0rked kernel code mapping stuff
in there?
> By removing paravirt_enabled() we may miss those errors. Worse, I think we
> may even crash while doing pagetable walk (although it's probably better to
> crash here than to use an unexpected translation in real code somewhere)
Well, if this is the only site which keeps paravirt_enabled() from being
buried, we need to think about a better way to detect a hypervisor.
Maybe we should look at x86_hyper, use CPUID(0x4...) or something else.
What's your preference?
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
next prev parent reply other threads:[~2016-02-17 22:03 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-06 4:30 [PATCH v2 0/3] paravirt: rebrand paravirt_enabled as paravirt_legacy Luis R. Rodriguez
2016-02-06 4:30 ` [PATCH v2 1/3] paravirt: use bool for paravirt_enabled() and paravirt_has_feature() Luis R. Rodriguez
2016-02-06 4:30 ` [PATCH v2 2/3] paravirt: replace direct access to pv_info.paravirt_enabled Luis R. Rodriguez
2016-02-06 4:30 ` [PATCH v2 3/3] paravirt: rename paravirt_enabled to paravirt_legacy Luis R. Rodriguez
2016-02-06 7:11 ` Andy Lutomirski
2016-02-06 8:59 ` Luis R. Rodriguez
2016-02-06 20:05 ` Andy Lutomirski
2016-02-06 22:04 ` Borislav Petkov
2016-02-08 15:39 ` Boris Ostrovsky
2016-02-08 15:55 ` Borislav Petkov
2016-02-08 16:05 ` [Xen-devel] " Andrew Cooper
2016-02-08 16:12 ` Boris Ostrovsky
2016-02-08 16:26 ` Andrew Cooper
2016-02-08 16:31 ` Boris Ostrovsky
2016-02-08 16:32 ` Andrew Cooper
2016-02-08 16:35 ` Borislav Petkov
2016-02-08 16:38 ` Andrew Cooper
2016-02-08 16:45 ` Borislav Petkov
2016-02-08 16:52 ` Boris Ostrovsky
2016-02-08 20:45 ` Boris Ostrovsky
2016-02-08 21:06 ` Borislav Petkov
2016-02-08 16:53 ` Andrew Cooper
2016-02-08 17:13 ` Borislav Petkov
2016-02-09 6:22 ` Luis R. Rodriguez
2016-02-08 16:41 ` Boris Ostrovsky
2016-02-08 16:52 ` Borislav Petkov
2016-02-08 15:31 ` Boris Ostrovsky
2016-02-08 15:46 ` Borislav Petkov
2016-02-09 6:59 ` Luis R. Rodriguez
2016-02-08 21:04 ` Andy Lutomirski
2016-02-09 7:06 ` Luis R. Rodriguez
2016-02-17 20:07 ` Luis R. Rodriguez
2016-02-17 20:49 ` Borislav Petkov
2016-02-17 21:12 ` Luis R. Rodriguez
2016-02-17 21:21 ` Boris Ostrovsky
2016-02-17 22:03 ` Borislav Petkov [this message]
2016-02-17 22:18 ` Andy Lutomirski
2016-02-17 22:39 ` Boris Ostrovsky
2016-02-17 23:39 ` Borislav Petkov
2016-02-17 22:19 ` Boris Ostrovsky
2016-02-17 22:35 ` Luis R. Rodriguez
2016-02-09 6:41 ` Luis R. Rodriguez
2016-02-08 21:49 ` Boris Ostrovsky
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20160217220304.GP2023@pd.tnic \
--to=bp@alien8.de \
--cc=JBeulich@suse.com \
--cc=andrew.cooper3@citrix.com \
--cc=aryabinin@virtuozzo.com \
--cc=boris.ostrovsky@oracle.com \
--cc=david.vrabel@citrix.com \
--cc=fengguang.wu@intel.com \
--cc=hpa@zytor.com \
--cc=jgross@suse.com \
--cc=joro@8bytes.org \
--cc=konrad.wilk@oracle.com \
--cc=linux-kernel@vger.kernel.org \
--cc=long.wanglong@huawei.com \
--cc=luto@amacapital.net \
--cc=lv.zheng@intel.com \
--cc=mcb30@ipxe.org \
--cc=mcgrof@kernel.org \
--cc=mchehab@osg.samsung.com \
--cc=qiuxishi@huawei.comAndrey \
--cc=rafael.j.wysocki@intel.com \
--cc=robert.moore@intel.com \
--cc=rusty@rustcorp.com.au \
--cc=tglx@linutronix.de \
--cc=xen-devel@lists.xensource.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).