PI spec doesn’t define the clear rule. So, this is not PeiCore compliant issue.
Like Jiewen say, Early PEIM that run before CAR down can consume data from PPI
and publish HOB. It should be platform PEIM, because we can’t assure the
generic PEIM is dispatched before CAR down.
Thanks
Liming
From: Yao, Jiewen [mailto:jiewen....@intel.com]
Sent: Saturday, February 28, 2015 2:34 PM
To: edk2-devel@lists.sourceforge.net
Subject: Re: [edk2] SEC PPI HOBs
I think CPU PEIM need consume data from PPI and publish HOB.
CPU PEIM might also reinstall EFI_SEC_PLATFORM_INFORMATION_PPI to let PPI
consume data from HOB. The Old EFI_SEC_PLATFORM_INFORMATION_PPI might refer
data on CAR, which is not available after CAR teardown.
Thank you
Yao Jiewen
From: Andrew Fish [mailto:af...@apple.com]
Sent: Saturday, February 28, 2015 7:32 AM
To: edk2-devel@lists.sourceforge.net<mailto:edk2-devel@lists.sourceforge.net>
Subject: Re: [edk2] SEC PPI HOBs
On Feb 27, 2015, at 3:02 PM, Tim Lewis
<tim.le...@insyde.com<mailto:tim.le...@insyde.com>> wrote:
Section 8.3.1 of the PI Specification, volume 1, says (of the
EFI_SEC_PLATFORM_INFORMATION_PPI)
This same information will be placed in a GUIDed HOB with the PPI GUID as the
HOB GUID.
This allows agents, such as the DXE multiprocessor (MP) driver, to get health
information for the
boot-strap processor (BSP).
But it isn’t clear who does this. The SEC code? Certainly the PEI Core doesn’t
do it From PeiMain.c (~375) And no sample I’ve looked at tries to do the GUIDed
HOB thing.
Thoughts?
The edk2 PEI Core does not conform to the specification?
I’m guessing some private GUID’ed HOBs existed prior to this PI defined one.
The CPU PEIM pass up data to the CPU DXE driver.
Thanks,
Andrew Fish
Tim
//
// If SEC provided any PPI services to PEI, install them.
//
if (PpiList != NULL) {
Status = PeiServicesInstallPpi (PpiList);
ASSERT_EFI_ERROR (Status);
}
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