From: David Vrabel <david.vrabel@citrix.com>
To: Andrew Cooper <andrew.cooper3@citrix.com>,
David Vrabel <david.vrabel@citrix.com>,
Jan Beulich <JBeulich@suse.com>
Cc: George Dunlap <george.dunlap@eu.citrix.com>,
Huaitong Han <huaitong.han@intel.com>, Tim Deegan <tim@xen.org>,
Xen-devel List <xen-devel@lists.xen.org>
Subject: Re: Xen PV PTE ABI (or lack thereof)
Date: Thu, 21 Jan 2016 14:53:38 +0000 [thread overview]
Message-ID: <56A0F0F2.6030702@citrix.com> (raw)
In-Reply-To: <56A0ED1F.90603@citrix.com>
On 21/01/16 14:37, Andrew Cooper wrote:
>> I think we should document the PV ABI as-is. i.e., that these two PTE
>> bits are not available for PV guest use.
>
> This is already known to break some guests. It shouldn't stay as it
> currently is.
It's unfortunate that the current ABI is incompatible with some guests
in some situations, but it can't be fixed without adding a mechanism for
the guest to query or negotiate PTE bit availability since existing
guests have to be able to run on older hypervisors.
David
prev parent reply other threads:[~2016-01-21 14:53 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-20 20:10 Xen PV PTE ABI (or lack thereof) Andrew Cooper
2016-01-21 11:07 ` Jan Beulich
2016-01-21 11:16 ` Andrew Cooper
2016-01-21 12:59 ` Jan Beulich
2016-01-21 13:17 ` Andrew Cooper
2016-01-21 13:55 ` Jan Beulich
2016-01-21 15:10 ` Andrew Cooper
2016-01-21 14:29 ` David Vrabel
2016-01-21 14:37 ` Andrew Cooper
2016-01-21 14:53 ` David Vrabel [this message]
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