From mboxrd@z Thu Jan  1 00:00:00 1970
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: Re: [Xen-devel] [PATCH 4/6] xen/pvh: bootup and setup related
 changes.
Date: Thu, 25 Oct 2012 08:38:46 -0400
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To: Mukesh Rathor <mukesh.rathor@oracle.com>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Ian Campbell <Ian.Campbell@citrix.com>, "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
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> > > > Yes, I think that this version looks better
> > > 
> > > But doesn't boot:
> > > 
> > > (XEN) vmx_hybrid.c:710:d0 Dom:0 EPT violation 0x181 (r--/---), gpa
> > > 0x000000bf421e1c, mfn 0xffffffffffffffff, type 4. (XEN)
> > > p2m-ept.c:642:d0 Walking EPT tables for domain 0 gfn bf421 (XEN)
> > > p2m-ept.c:648:d0  gfn exceeds max_mapped_pfn 4b062 (XEN)
> > > vmx_hybrid.c:717:d0  --- GLA 0xffffffffff477e1c
> > > 
> > > 
> > > I'll have to debug it, or we can go back to the prev version, which
> > > I don't think is that un-pretty :).
> > > 
> > 
> > The reason being:
> > xen_set_identity_and_release_chunk():
> > NEW : > for (pfn = start_pfn; pfn <= max_pfn_mapped && pfn < end_pfn;
> > pfn++) {
> > 
> > xen_pvh_identity_map_chunk():
> > OLD: for (pfn = start_pfn; pfn < end_pfn; pfn++)
> > 
> > IOW, for PVH we need to avoid testing for max_pfn_mapped, as we are
> > mapping the entire IO space. 
> 
> Also, now your counts for released and identity are off. Can we please
> go back to the way it was? 

Lets drop this patch then for right now. Can you post an alpha-RFC of your
Xen hypervisor patches so that I can wrangle the PV and PVH in the E820
code to use same paths as much as possible.