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From: "Roger Pau Monné" <roger.pau@citrix.com>
To: Manuel Bouyer <bouyer@antioche.eu.org>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>,
	xen-devel@lists.xenproject.org
Subject: Re: IOCTL_PRIVCMD_MMAPBATCH on Xen 4.13.0
Date: Tue, 19 May 2020 11:54:07 +0200	[thread overview]
Message-ID: <20200519095407.GE54375@Air-de-Roger> (raw)
In-Reply-To: <20200517175607.GA8793@antioche.eu.org>

On Sun, May 17, 2020 at 07:56:07PM +0200, Manuel Bouyer wrote:
> On Sun, May 17, 2020 at 07:32:59PM +0200, Manuel Bouyer wrote:
> > I've been looking a bit deeper in the Xen kernel.
> > The mapping is failed in ./arch/x86/mm/p2m.c:p2m_get_page_from_gfn(),
> >         /* Error path: not a suitable GFN at all */
> > 	if ( !p2m_is_ram(*t) && !p2m_is_paging(*t) && !p2m_is_pod(*t) ) {
> > 	    gdprintk(XENLOG_ERR, "p2m_get_page_from_gfn2: %d is_ram %ld is_paging %ld is_pod %ld\n", *t, p2m_is_ram(*t), p2m_is_paging(*t), p2m_is_pod(*t) );
> > 	    return NULL;
> > 	}
> > 
> > *t is 4, which translates to p2m_mmio_dm
> > 
> > it looks like p2m_get_page_from_gfn() is not ready to handle this case
> > for dom0.
> 
> And so it looks like I need to implement osdep_xenforeignmemory_map_resource()
> for NetBSD

FWIW, FreeBSD doesn't have osdep_xenforeignmemory_map_resource
implemented and still works fine with 4.13.0 (is able to create HVM
guests), but that's a PVH dom0, not a PV one.

Regards, Roger.


  parent reply	other threads:[~2020-05-19  9:54 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-15 20:29 IOCTL_PRIVCMD_MMAPBATCH on Xen 4.13.0 Manuel Bouyer
2020-05-15 21:00 ` Andrew Cooper
2020-05-15 21:06   ` Manuel Bouyer
2020-05-15 21:38     ` Andrew Cooper
2020-05-15 21:53       ` Manuel Bouyer
2020-05-16 16:18         ` Andrew Cooper
2020-05-17  9:30           ` Manuel Bouyer
2020-05-17 17:32           ` Manuel Bouyer
2020-05-17 17:56             ` Manuel Bouyer
2020-05-18  7:36               ` Paul Durrant
2020-05-18 17:31                 ` Manuel Bouyer
2020-05-19  7:34                   ` Jan Beulich
2020-05-19  8:46                     ` Manuel Bouyer
2020-05-19  8:51                       ` Jan Beulich
2020-05-19  9:54               ` Roger Pau Monné [this message]
2020-05-19 10:28                 ` Manuel Bouyer

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