Re: [Xen-devel] Debian Wheezy installer crashes guest when EPT is enabled

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Fri, Apr 18, 2014 at 03:08:04PM +0100, Wei Liu wrote:
> Hi Jan
> 
> I see in the master tree that there are many changes to EPT lately. With
> the current master tree (as of c82fbfe), I cannot install Debian Wheezy
> in HVM mode when EPT is enabled. It used to work at d2b4c27.
> 
> One particular interesting changeset is aa9114ed ("x86/EPT: force
> re-evaluation of memory type as necessary"), because I saw the faulting
> VMEXIT reason to be EXIT_REASON_EPT_MISCONFIG. But I cannot see
> immediate connection.
> 
> The step to reproduce is easy:
> 0. get an Intel EPT capable machine (I have Xeon X3450)
> 1. grab Xen master tree and install
> 2. download debian-7.2.0-amd64-CD-1.iso from any Debian mirror and
>    install it in HVM mode, with HAP enabled
> 3. guest crashes soon after installer runs
> 

... and this guest has 5000MB RAM.  If RAM is set to 768MB guest doesn't
crash.

Wei.

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