[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 2/2] altp2m: Implement p2m_get_mem_access for altp2m views
On Thu, Jan 28, 2016 at 10:04 AM, Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx> wrote: On 01/28/2016 06:40 PM, Lengyel, Tamas wrote: Sure, make sense. Since AFAIK you guys are the only one really using this path I'm cool with keeping it as it is, was really just wondering for the logic behind it. Without a reference implementation using this path it's not exactly trivial trying to figure out why things are the way they are. Jan, with the explanation above by Razvan, when using emulation with altp2m the correct check here is to see if the altp2m permissions are still restricted, otherwise no need to emulate. So this patch actually makes the two systems correctly work together. Without this patch only the hostp2m permissions are checked which may not have the restrictions that actually caused the fault and lead to infinite faults and hanging the VM. Tamas _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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