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From: Gerd Hoffmann <kraxel@redhat.com>
To: Wei Liu <wei.liu2@citrix.com>
Cc: "Jordan Justen (Intel address)" <jordan.l.justen@intel.com>,
	Igor Mammedov <imammedo@redhat.com>,
	edk2-devel@lists.sourceforge.net,
	Laszlo Ersek <lersek@redhat.com>,
	xen-devel@lists.xen.org
Subject: Re: [edk2] Passing Xen memory map and resource map to OVMF
Date: Thu, 14 Nov 2013 08:58:18 +0100	[thread overview]
Message-ID: <1384415898.15534.15.camel__18890.2029338808$1384416029$gmane$org@nilsson.home.kraxel.org> (raw)
In-Reply-To: <20131113165644.GA16969@zion.uk.xensource.com>

  Hi,

> > > OVMF
> > > should just use whatever it gets.
> > 
> > What would OVMF use them for?
> > 
> 
> To reserve range for MMIO holes, so that later PCI resource allocation
> protocol can only use those ranges.

I'm still not convinced you need that in the first place.

When booting seabios @ xen it is not needed.  pci ressource allocation
is handled by hvmloader.  apci tables (and the ressources declared
therein) are handled by hvmloader.  seabios doesn't touch the pci bars
and passes through the apci tables -> guest os is happy.

So why ovmf should be different?   IMHO it should operate like seabios
and NOT do pci ressource allocation when running on xen.  Ressources are
already handled already by hvmloader.  Doing it again is (a) pointless
and (b) creates problems like the one we are discussion right now.

cheers,
  Gerd

  parent reply	other threads:[~2013-11-14  7:58 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20131112183321.GN13369@zion.uk.xensource.com>
2013-11-12 19:05 ` [edk2] Passing Xen memory map and resource map to OVMF Laszlo Ersek
     [not found] ` <52827C0B.5040901@redhat.com>
2013-11-12 19:20   ` Laszlo Ersek
2013-11-13  7:03   ` Gerd Hoffmann
     [not found]   ` <1384326219.3560.9.camel@nilsson.home.kraxel.org>
2013-11-13 11:58     ` Wei Liu
     [not found]     ` <20131113115811.GC4948@zion.uk.xensource.com>
2013-11-13 13:53       ` Gerd Hoffmann
     [not found]       ` <1384350814.3560.24.camel@nilsson.home.kraxel.org>
2013-11-13 14:06         ` Wei Liu
     [not found]         ` <20131113140654.GF4948@zion.uk.xensource.com>
2013-11-13 14:23           ` Gerd Hoffmann
     [not found]           ` <1384352585.3560.36.camel@nilsson.home.kraxel.org>
2013-11-13 16:56             ` Wei Liu
     [not found]             ` <20131113165644.GA16969@zion.uk.xensource.com>
2013-11-14  7:58               ` Gerd Hoffmann [this message]
     [not found]               ` <1384415898.15534.15.camel@nilsson.home.kraxel.org>
2013-11-14 10:47                 ` Wei Liu
2013-11-14 11:06                 ` Laszlo Ersek
     [not found]                 ` <20131114104738.GB23151@zion.uk.xensource.com>
2013-11-14 11:19                   ` Gerd Hoffmann
     [not found]                 ` <5284AEA4.6090004@redhat.com>
2013-11-14 16:42                   ` Andrew Fish
     [not found]                   ` <746A3CCD-E629-4AD5-9889-3BC89A7814F9@apple.com>
2013-11-15  7:18                     ` Gerd Hoffmann
2013-11-15 14:26                     ` Wei Liu
2013-11-13 16:51         ` Konrad Rzeszutek Wilk
2013-11-13 16:47     ` Konrad Rzeszutek Wilk
2013-11-12 19:22 ` Konrad Rzeszutek Wilk
2013-11-13 10:34   ` Ian Campbell
2013-11-12 19:51 ` Jordan Justen
2013-11-13 10:38 ` Ian Campbell
     [not found] ` <CAFe8ug92_AUd45s3MNA19nz-etSK-aZxKTqdsskFqDX9BBdTjA@mail.gmail.com>
2013-11-13 11:59   ` Wei Liu

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