From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: keir@xen.org, xen-devel@lists.xen.org
Subject: Re: [PATCH for-xen-4.5] x86/pvh/vpmu: Disable VPMU for PVH guests
Date: Tue, 25 Nov 2014 11:19:11 -0500 [thread overview]
Message-ID: <5474ABFF.1030306@oracle.com> (raw)
In-Reply-To: <5474A666020000780004AB9C@mail.emea.novell.com>
On 11/25/2014 09:55 AM, Jan Beulich wrote:
>
>> Regardless, do you think that disabling VPMU for PVH is worth anyway?
> That depends on what (bad) consequences not doing so has.
I haven't seen anything (besides VAPIC accesses) but I think it would be
prudent to prevent any VPMU activity from happening. I can see, for
example MSRs and APIC vector being written. All of which look benign on
the first sight but who knows...
-boris
next prev parent reply other threads:[~2014-11-25 16:19 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-24 19:49 [PATCH for-xen-4.5] x86/pvh/vpmu: Disable VPMU for PVH guests Boris Ostrovsky
2014-11-25 8:45 ` Jan Beulich
2014-11-25 14:38 ` Boris Ostrovsky
2014-11-25 14:55 ` Jan Beulich
2014-11-25 16:19 ` Boris Ostrovsky [this message]
2014-11-25 16:39 ` Jan Beulich
2014-11-25 17:54 ` Konrad Rzeszutek Wilk
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