Laszlo, That makes sense for virtual platforms. Thanks for the explanation.
Regards, Jian > -----Original Message----- > From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Laszlo Ersek > Sent: Thursday, November 14, 2019 10:51 PM > To: Wang, Jian J <jian.j.w...@intel.com>; devel@edk2.groups.io; Ard > Biesheuvel <ard.biesheu...@linaro.org> > Cc: Justen, Jordan L <jordan.l.jus...@intel.com>; Gao, Liming > <liming....@intel.com>; Ni, Ray <ray...@intel.com> > Subject: Re: [edk2-devel] [PATCH 08/11] OvmfPkg: specify RngLib instances in > dsc files > > On 11/14/19 15:40, Wang, Jian J wrote: > > > I'm curious that you want to do the "degrade" dynamically at boot time not > > build time, right? > > Indeed, that's the whole point. When running on QEMU (considering all of > arm/aarch64/i386/x86_64), the firmware can assume quite little of the > underlying platform hardware; a single firmware binary is expected to > support multiple (virtual) hardware configurations. Therefore several > decisions have to be made dynamically at boot time, in the firmware, > that physical firmware platforms can hard-wire at build time. > > (Of course this approach has its limits -- the most visible "platform > split" that we do implement at build time is "QEMU vs. Xen". ArmVirtPkg > implements this switch only at build time, and OvmfPkg will also fully > adopt that approach in the future.) > > Thanks > Laszlo > > > -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#50674): https://edk2.groups.io/g/devel/message/50674 Mute This Topic: https://groups.io/mt/56714143/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
