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Date: Wed, 7 Aug 2019 17:50:05 +0200
From: =?UTF-8?B?Um9nZXIgUGF1IE1vbm7DqQ==?= <roger.pau@citrix.com>
To: <devel@edk2.groups.io>, <anthony.perard@citrix.com>
CC: Julien Grall <julien.grall@arm.com>, <xen-devel@lists.xenproject.org>,
	Jordan Justen <jordan.l.justen@intel.com>, Ard Biesheuvel
	<ard.biesheuvel@linaro.org>, Laszlo Ersek <lersek@redhat.com>
Subject: Re: [edk2-devel] [PATCH v4 28/35] OvmfPkg/PlatformBootManagerLib: Handle the absence of PCI bus on Xen PVH
Message-ID: <20190807155005.b5tyxlwjfoo6urko@Air-de-Roger>
References: <20190729153944.24239-1-anthony.perard@citrix.com>
 <20190729153944.24239-29-anthony.perard@citrix.com>
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On Mon, Jul 29, 2019 at 04:39:37PM +0100, Anthony PERARD wrote:
> When running in a Xen PVH guest, there's nothing to do in
> PciAcpiInitialization() because there isn't any PCI bus. When the Host
> Bridge DID isn't recognised, simply continue. (The value of
> PcdOvmfHostBridgePciDevId would be 0 because it isn't set.)

I guess we will need to figure out how to make OVMF happy when
passthrough support is added to PVH. Having to fake a bridge is quite
cumbersome, but I assume OVMF only pokes at some specific bridge
registers which we might be able to emulate without much fuss.

Thanks, Roger.