From: "Michael Kubacki" <mikuback@linux.microsoft.com>
To: Ni, Ray <ray.ni@intel.com>,devel@edk2.groups.io
Subject: Re: [edk2-devel] [edk2-platforms][PATCH v1 1/1] IntelSiliconPkg: Add BaseSmmAccessLibNull
Date: Thu, 12 Aug 2021 19:16:04 -0700 [thread overview]
Message-ID: <28423.1628820964257783330@groups.io> (raw)
In-Reply-To: <CO1PR11MB4930E387CB7F0D49E7D131338CF99@CO1PR11MB4930.namprd11.prod.outlook.com>
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Sure.
Scenario #1:
MinPlatformPkg/PlatformInit/PlatformInitPei/PlatformInitPreMem.inf and MinPlatormPkg/PlatformInit/PlatformInitPei/PlatformInitPostMem.inf both link against an instance of BoardInitLib.
Many boards link against a single BoardInitLib instance. See example - https://github.com/tianocore/edk2-platforms/blob/cd4e6b716c7d1bcde94035e7dce14b53a553e103/Platform/Intel/KabylakeOpenBoardPkg/KabylakeRvp3/OpenBoardPkg.dsc#L203
That BoardInitLib instance may link against SmmAccessLib. PlatformInitPreMem may wish to library class override the SmmAccessLib to the NULL instance while keeping it to non-NULL instance in PlatformInitPostMem.
Scenario #2:
A PEIM is built that checks whether the boot mode is S3. If so, it calls PeiInstallSmmAccessPpi(). A particular platform does not support S3, therefore, it links BaseSmmAccessLibNull as its library instance for SmmAccessLib.
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next prev parent reply other threads:[~2021-08-13 2:16 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-09 14:15 [edk2-platforms][PATCH v1 1/1] IntelSiliconPkg: Add BaseSmmAccessLibNull Michael Kubacki
2021-08-09 22:42 ` Chaganty, Rangasai V
2021-08-10 2:30 ` Ni, Ray
2021-08-10 15:28 ` [edk2-devel] " Michael Kubacki
2021-08-12 5:32 ` Ni, Ray
2021-08-13 2:16 ` Michael Kubacki [this message]
2021-08-18 18:45 ` Michael Kubacki
2021-08-19 9:49 ` Ni, Ray
2021-08-19 16:53 ` Michael Kubacki
2021-08-20 5:33 ` Ni, Ray
2021-08-20 19:34 ` Michael Kubacki
2021-09-09 14:12 ` Michael Kubacki
2021-09-09 14:49 ` Ni, Ray
2021-09-09 14:54 ` Michael Kubacki
2021-09-09 14:58 ` Ni, Ray
2021-09-09 15:23 ` Michael Kubacki
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