linux-kernel - Re: [Xen-devel] [PATCH 4/6] xen/pvh: bootup and setup related changes.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20121025123828.GA25640@localhost.localdomain>
Date:	Thu, 25 Oct 2012 08:38:46 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	Mukesh Rathor <mukesh.rathor@...cle.com>
Cc:	Stefano Stabellini <stefano.stabellini@...citrix.com>,
	Ian Campbell <Ian.Campbell@...rix.com>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [Xen-devel] [PATCH 4/6] xen/pvh: bootup and setup related
 changes.

> > > > 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.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/