> On Oct 29, 2014, at 11:45 AM, Olivier Martin <[email protected]> wrote: > > I have just noticed I have replied one of your question. > > To answer your question on "how to restrict to use only first memory range". > I know one way to do it, but I am not sure it is the recommended way... > > If you do not want to run UEFI into the upper memory space. You can declare > this memory range without 'EFI_RESOURCE_ATTRIBUTE_TESTED'. > So this DRAM range will be: "EFI_RESOURCE_ATTRIBUTE_PRESENT | > EFI_RESOURCE_ATTRIBUTE_INITIALIZED" but NOT 'EFI_RESOURCE_ATTRIBUTE_TESTED'. > > But I am not sure it is the right approach... The OS kernel might skip this > DRAM range if it does not see the memory as 'EFI_RESOURCE_ATTRIBUTE_TESTED’.
The EFI_RESOURCE_ATTRIBUTE_TESTED is a PI concept, not a UEFI concept. It is not passed up to the OS. The DXE core will pass up untested and tested memory to the OS in the memory map, as it is just memory to UEFI. The DXE Core will only allocate from tested memory, but if the DXE Core runs out of tested memory it will fallback and try to use untested memory (as this is better than crashing). The resource descriptor HOBs that initialized the DXE Core’s view of memory are how this info is passed into the DXE Core. You would need to use ACPI tables to describe the locality of the memory to the OS. Thanks, Andrew Fish > Another approach would be to introduce a PCD (I actually thought there was > one) and change the DXE core to not allocate further than this PCD value. > > >> -----Original Message----- >> From: Ganapatrao Kulkarni [mailto:[email protected]] >> Sent: 14 October 2014 19:51 >> To: [email protected] >> Subject: Re: [edk2] how to manage multiple dram memory ranges >> >> Hi Olivier, >> >> all DXE drivers load happens from second memory range (upper range). >> how to restrict to use only first memory range. >> >> i want add multiple memory ranges so that uefi passes all memory info >> to Linux kernel. >> we dont want to load/run the DXE/drivers on secondary memory ranges, >> since it may be remote memory or memory on other node in numa context. >> >> thanks for your help. >> >> regards >> ganapat >> >> >> On Tue, Oct 14, 2014 at 7:45 PM, Olivier Martin >> <[email protected]> wrote: >>> Do you confirm you are using: >>> - MdeModulePkg/Universal/PCD/Pei/Pcd.inf >>> - MdeModulePkg/Universal/PCD/Dxe/Pcd.inf >>> >>>> -----Original Message----- >>>> From: Ganapatrao Kulkarni [mailto:[email protected]] >>>> Sent: 14 October 2014 14:47 >>>> To: [email protected] >>>> Subject: Re: [edk2] how to manage multiple dram memory ranges >>>> >>>> On Mon, Oct 13, 2014 at 7:14 PM, Olivier Martin >>>> <[email protected]> wrote: >>>>> It is possible to retrieve the memory from FDT. Have a look at the >>>>> ArmVirtualizationPkg for an example: >>>>> >>>> >> https://github.com/tianocore/edk2/blob/master/ArmPlatformPkg/ArmVirtual >>>> izati >>>>> onPkg/Library/ArmVirtualizationPlatformLib/Virt.c >>>> >>>> thanks. >>>> i am trying to enable _PCD_SET_MODE_64_PcdSystemMemorySize for >>>> Variable PcdSystemMemorySize >>>> i have removed the entries from FixedPcd from inf, dev and dsc >> files, >>>> still not working. >>>> any specific settings needs to be taken care? please suggest. >>>>> >>>>> >>>>>> -----Original Message----- >>>>>> From: Ganapatrao Kulkarni [mailto:[email protected]] >>>>>> Sent: 13 October 2014 13:25 >>>>>> To: [email protected] >>>>>> Subject: Re: [edk2] how to manage multiple dram memory ranges >>>>>> >>>>>> On Mon, Oct 13, 2014 at 2:37 PM, Olivier Martin >>>>>> <[email protected]> wrote: >>>>>>> Hi Ganapat, >>>>>>> Have a look at this page: >>>>>>> >> http://tianocore.sourceforge.net/wiki/ArmPlatformPkg/SparseMemory >>>>>>> Olivier >>>>>> >>>>>> thanks Olivier. >>>>>> Is it feasible to implement fdt memory node (instead of hard >> coding >>>> in >>>>>> the code) based init of memory ranges in function >>>>>> "ArmPlatformInitializeSystemMemory"? >>>>>>> >>>>>>>> -----Original Message----- >>>>>>>> From: Ganapatrao Kulkarni [mailto:[email protected]] >>>>>>>> Sent: 13 October 2014 07:59 >>>>>>>> To: [email protected] >>>>>>>> Subject: [edk2] how to manage multiple dram memory ranges >>>>>>>> >>>>>>>> Hi All, >>>>>>>> >>>>>>>> If my hardware has multiple DDRs with discontiguous address >>>> range. >>>>>>>> then how do add these ranges to uefi. >>>>>>>> >>>>>>>> currently i have added single dram range using >>>> PcdSystemMemoryBase >>>>>> and >>>>>>>> PcdSystemMemorySize in dsc file. >>>>>>>> >>>>>>>> also can i manage the range using DT file? >>>>>>>> >>>>>>>> thanks >>>>>>>> Ganapat >>>>>>>> >>>>>>>> -------------------------------------------------------------- >> --- >>>> --- >>>>>> --- >>>>>>>> ------- >>>>>>>> Meet PCI DSS 3.0 Compliance Requirements with EventLog >> Analyzer >>>>>>>> Achieve PCI DSS 3.0 Compliant Status with Out-of-the-box PCI >> DSS >>>>>>>> Reports >>>>>>>> Are you Audit-Ready for PCI DSS 3.0 Compliance? Download White >>>> paper >>>>>>>> Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog >>>> Analyzer >>>>>>>> http://p.sf.net/sfu/Zoho >>>>>>>> _______________________________________________ >>>>>>>> edk2-devel mailing list >>>>>>>> [email protected] >>>>>>>> https://lists.sourceforge.net/lists/listinfo/edk2-devel >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> --------------------------------------------------------------- >> --- >>>> --- >>>>>> --------- >>>>>>> Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer >>>>>>> Achieve PCI DSS 3.0 Compliant Status with Out-of-the-box PCI >> DSS >>>>>> Reports >>>>>>> Are you Audit-Ready for PCI DSS 3.0 Compliance? Download White >>>> paper >>>>>>> Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog >>>> Analyzer >>>>>>> http://p.sf.net/sfu/Zoho >>>>>>> _______________________________________________ >>>>>>> edk2-devel mailing list >>>>>>> [email protected] >>>>>>> https://lists.sourceforge.net/lists/listinfo/edk2-devel >>>>>> >>>>>> thanks >>>>>> ganapat >>>>>> >>>>>> ----------------------------------------------------------------- >> --- >>>> --- >>>>>> ------- >>>>>> Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer >>>>>> Achieve PCI DSS 3.0 Compliant Status with Out-of-the-box PCI DSS >>>>>> Reports >>>>>> Are you Audit-Ready for PCI DSS 3.0 Compliance? Download White >> paper >>>>>> Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog >> Analyzer >>>>>> http://p.sf.net/sfu/Zoho >>>>>> _______________________________________________ >>>>>> edk2-devel mailing list >>>>>> [email protected] >>>>>> https://lists.sourceforge.net/lists/listinfo/edk2-devel >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> ------------------------------------------------------------------ >> --- >>>> --------- >>>>> Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer >>>>> Achieve PCI DSS 3.0 Compliant Status with Out-of-the-box PCI DSS >>>> Reports >>>>> Are you Audit-Ready for PCI DSS 3.0 Compliance? 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