linux-kernel - Re: [PATCH] xen: Don't try to call xen_alloc_p2m

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Message-ID: <ed5d658c-ca7e-6d6f-724f-eecba0e2683c@suse.com>
Date:   Thu, 24 Aug 2017 08:11:11 +0200
From:   Juergen Gross <jgross@...e.com>
To:     Boris Ostrovsky <boris.ostrovsky@...cle.com>
Cc:     xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] xen: Don't try to call xen_alloc_p2m_entry() on
 autotranslating guests

On 24/08/17 00:27, Boris Ostrovsky wrote:
> Commit aba831a69632 ("xen: remove tests for pvh mode in pure pv paths")
> removed XENFEAT_auto_translated_physmap test in xen_alloc_p2m_entry()
> since it is assumed that the routine is never called by non-PV guests.
> 
> However, alloc_xenballooned_pages() may make this call on a PVH guest.
> Prevent this from happening by adding XENFEAT_auto_translated_physmap
> check there.
> 
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>
> Fixes: aba831a69632 ("xen: remove tests for pvh mode in pure pv paths")

Reviewed-by: Juergen Gross <jgross@...e.com>


Thanks,

Juergen