From: Borislav Petkov <bp@alien8.de>
To: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.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
Subject: Re: [Xen-devel] [PATCH v2 3/3] paravirt: rename paravirt_enabled to paravirt_legacy
Date: Mon, 8 Feb 2016 17:45:45 +0100 [thread overview]
Message-ID: <20160208164545.GJ28980@pd.tnic> (raw)
In-Reply-To: <56B8C490.1060004@citrix.com>
On Mon, Feb 08, 2016 at 04:38:40PM +0000, Andrew Cooper wrote:
> Does the early loader have extable support? If so, this is fairly easy
> to fix. If not, we have a problem.
It doesn't and regardless, you want to have this CPUID querying as
simple as possible. No special handling, no special prefixes as it
should be able to run on other hypervisors too.
If one can't execute a simple CPUID(0x4...) on a xen guest and get the
results back, then for early, we will have to do what we've done until
now and simply emulate the MSR accesses.
Later code can use then xen_cpuid() and all is fine. We should still get
rid of paravirt_enabled() though.
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
next prev parent reply other threads:[~2016-02-08 16:45 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 [this message]
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
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=20160208164545.GJ28980@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=cocci@systeme.lip6.fr \
--cc=david.e.box@intel.com \
--cc=hpa@zytor.com \
--cc=jgross@suse.com \
--cc=joro@8bytes.org \
--cc=linux-kernel@vger.kernel.org \
--cc=luto@amacapital.net \
--cc=lv.zheng@intel.com \
--cc=mcb30@ipxe.org \
--cc=mcgrof@kernel.org \
--cc=mcgrof@suse.com \
--cc=mchehab@osg.samsung.com \
--cc=mingo@redhat.com \
--cc=qiuxishi@huawei.com \
--cc=rafael.j.wysocki@intel.com \
--cc=robert.moore@intel.com \
--cc=rusty@rustcorp.com.au \
--cc=ryabinin.a.a@gmail.com \
--cc=tglx@linutronix.de \
--cc=x86@kernel.org \
--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).