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Date: Fri, 17 Dec 2021 07:33:49 +0100
From: "Gerd Hoffmann" <kraxel@redhat.com>
To: Ard Biesheuvel <ardb@kernel.org>
Cc: edk2-devel-groups-io <devel@edk2.groups.io>,
	Pawel Polawski <ppolawsk@redhat.com>,
	Liming Gao <gaoliming@byosoft.com.cn>,
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	Jordan Justen <jordan.l.justen@intel.com>,
	Leif Lindholm <leif@nuviainc.com>
Subject: Re: [edk2-devel] [PATCH 3/6] OvmfPkg/PlatformPei: unfix PcdPciExpressBaseAddress
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On Thu, Dec 16, 2021 at 01:50:18PM +0100, Ard Biesheuvel wrote:
> On Thu, 16 Dec 2021 at 10:50, Gerd Hoffmann <kraxel@redhat.com> wrote:
> >
> > Will be set by FdtPciHostBridgeLib, so it can't be an fixed when we
> > want use that library.
> >
> > Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
> 
> What guarantees that these accesses only ever see the correct, updated value?

For q35 nothing changes (the value is never written).

For microvm the default is set to 0xffffffffffffffff,
simliar to ArmVirt (see patch #6).

take care,
  Gerd