From: "Laszlo Ersek" <lersek@redhat.com>
To: "Wang, Jian J" <jian.j.wang@intel.com>,
"devel@edk2.groups.io" <devel@edk2.groups.io>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: "Justen, Jordan L" <jordan.l.justen@intel.com>,
"Gao, Liming" <liming.gao@intel.com>,
"Ni, Ray" <ray.ni@intel.com>
Subject: Re: [edk2-devel] [PATCH 08/11] OvmfPkg: specify RngLib instances in dsc files
Date: Thu, 14 Nov 2019 15:51:03 +0100 [thread overview]
Message-ID: <adf55523-1f65-d0f4-cfe3-cfdea8bd2bc4@redhat.com> (raw)
In-Reply-To: <D827630B58408649ACB04F44C5100036259AFF13@SHSMSX107.ccr.corp.intel.com>
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
next prev parent reply other threads:[~2019-11-14 14:51 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-14 2:17 [PATCH 00/11] Use proper entropy sources Wang, Jian J
2019-11-14 2:17 ` [PATCH 01/11] NetworkPkg/NetworkPkg.dsc: specify RngLib instance for build Wang, Jian J
2019-11-14 2:17 ` [PATCH 02/11] SignedCapsulePkg/SignedCapsulePkg.dsc: specify RngLib instances Wang, Jian J
2019-11-14 2:17 ` [PATCH 03/11] FmpDevicePkg/FmpDevicePkg.dsc: specify RngLib instances in dsc files Wang, Jian J
2019-11-14 2:17 ` [PATCH 04/11] MdePkg/BaseLib: add interface to wrap rdseed IA instruction Wang, Jian J
2019-11-14 4:17 ` [edk2-devel] " Michael D Kinney
2019-11-14 4:40 ` Wang, Jian J
2019-11-14 2:17 ` [PATCH 05/11] SecurityPkg/RngLibRdSeed: add an instance of RngLib to make use rdseed Wang, Jian J
2019-11-14 4:24 ` [edk2-devel] " Michael D Kinney
2019-11-14 4:38 ` Wang, Jian J
2019-11-15 13:28 ` Ard Biesheuvel
2019-11-15 17:21 ` Michael D Kinney
2019-11-15 17:35 ` Ard Biesheuvel
2019-11-16 2:17 ` Wang, Jian J
2019-11-15 22:19 ` Laszlo Ersek
2019-11-14 2:17 ` [PATCH 06/11] SecurityPkg/DxeRngLibRngProtocol: add RNG protocol version of RngLib Wang, Jian J
2019-11-14 11:15 ` [edk2-devel] " Laszlo Ersek
2019-11-14 14:52 ` Wang, Jian J
2019-11-14 2:17 ` [PATCH 07/11] SecurityPkg/SecurityPkg.dsc: add new RngLib instances for build Wang, Jian J
2019-11-14 2:17 ` [PATCH 08/11] OvmfPkg: specify RngLib instances in dsc files Wang, Jian J
2019-11-14 11:07 ` [edk2-devel] " Laszlo Ersek
2019-11-14 14:40 ` Wang, Jian J
2019-11-14 14:51 ` Laszlo Ersek [this message]
2019-11-14 14:55 ` Wang, Jian J
2019-11-14 2:17 ` [PATCH 09/11] ArmVirtPkg/ArmVirt.dsc.inc: " Wang, Jian J
2019-11-14 7:41 ` [edk2-devel] " Ard Biesheuvel
2019-11-14 8:03 ` Wang, Jian J
2019-11-14 8:14 ` Ard Biesheuvel
2019-11-14 8:31 ` Wang, Jian J
2019-11-14 10:36 ` Laszlo Ersek
2019-11-14 14:26 ` Wang, Jian J
2019-11-14 2:17 ` [PATCH 10/11] CryptoPkg/OpensslLib: use RngLib to get high quality random entropy Wang, Jian J
2019-11-14 7:42 ` Ard Biesheuvel
2019-11-14 2:17 ` [PATCH 11/11] FmpDevicePkg/FmpDevicePkg.dsc: remove TimerLib instance Wang, Jian J
2019-11-14 4:21 ` [edk2-devel] [PATCH 00/11] Use proper entropy sources Michael D Kinney
2019-11-14 5:15 ` Wang, Jian J
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