Hi Liming,
The current algorithm allocates the bins from the top of the first
memory range given to the DXE Core. This is not guaranteed to be
the top of RAM. The heuristic will use the memory range from the
PHIT HOB if it is considered big enough. If PHIT is not big enough
then a search of the HOBs is made for one that is considered big
enough near the top of memory that is tested.
Additional memory can be added or promoted from untested to tested
after DXE Core init and that added or promoted memory may have
a higher address than the initial memory given to the DXE Core.
With current heuristics, platforms have to carefully construct the
HOBs in PEIM phase to get the behavior where these bins are at the
top of RAM.
With this feature, it provides precise control over where the
bins are placed.
Mike
> -----Original Message-----
> From: Laszlo Ersek <ler...@redhat.com>
> Sent: Wednesday, January 24, 2024 8:17 AM
> To: devel@edk2.groups.io; gaolim...@byosoft.com.cn; Kinney, Michael D
> <michael.d.kin...@intel.com>
> Cc: Li, Aaron <aaron...@intel.com>; Liu, Yun Y <yun.y....@intel.com>;
> 'Andrew Fish' <af...@apple.com>
> Subject: Re: [edk2-devel] 回复: [Patch v2 1/1] MdeModulePkg/Core/Dxe:
> Set MemoryTypeInfo bin range from HOB
>
> On 1/24/24 15:59, gaoliming via groups.io wrote:
> > Mike:
> > Current algorithm tries to reserve the top available memory for
> memory type
> > bin range.
> > If the platform uses new way to describe the memory range, should we
> > suggest the rule to still
> > use the top memory resource hob for the memory type bin range?
>
> How would that work, technically? If the platform specifies a concrete
> address range, how can that be reconciled with using the top of RAM?
>
> Or do you mean documentation? I.e., a note for platform implementors
> that they should point their new HOB to the top of RAM?
>
> Thanks
> Laszlo
>
> >
> > Thanks
> > Liming
> >> -----邮件原件-----
> >> 发件人: Michael D Kinney <michael.d.kin...@intel.com>
> >> 发送时间: 2024年1月24日 4:24
> >> 收件人: devel@edk2.groups.io
> >> 抄送: Liming Gao <gaolim...@byosoft.com.cn>; Aaron Li
> >> <aaron...@intel.com>; Liu Yun <yun.y....@intel.com>; Andrew Fish
> >> <af...@apple.com>
> >> 主题: [Patch v2 1/1] MdeModulePkg/Core/Dxe: Set MemoryTypeInfo bin
> >> range from HOB
> >>
> >> Provide an optional method for PEI to declare a specific address
> >> range to use for the Memory Type Information bins. The current
> >> algorithm uses heuristics that tends to place the Memory Type
> >> Information bins in the same location, but memory configuration
> >> changes across boots or algorithm changes across a firmware
> >> updates could potentially change the Memory Type Information bin
> >> location.
> >>
> >> If the HOB List contains a Resource Descriptor HOB that
> >> describes tested system memory and has an Owner GUID of
> >> gEfiMemoryTypeInformationGuid, then use the address range
> >> described by the Resource Descriptor HOB as the preferred
> >> location of the Memory Type Information bins. If this HOB is
> >> not detected, then the current behavior is preserved.
> >>
> >> The HOB with an Owner GUID of gEfiMemoryTypeInformationGuid
> >> is ignored for the following conditions:
> >> * The HOB with an Owner GUID of gEfiMemoryTypeInformationGuid
> >> is smaller than the Memory Type Information bins.
> >> * The HOB list contains more than one Resource Descriptor HOB
> >> with an owner GUID of gEfiMemoryTypeInformationGuid.
> >> * The Resource Descriptor HOB with an Owner GUID of
> >> gEfiMemoryTypeInformationGuid is the same Resource Descriptor
> >> HOB that that describes the PHIT memory range.
> >>
> >> Update the DxeMain initialization order to initialize GCD
> >> services before any runtime allocations are performed. This
> >> is required to prevent runtime data fragmentation when the
> >> UEFI System Table and UEFI Runtime Service Table is allocated.
> >>
> >> Cc: Liming Gao <gaolim...@byosoft.com.cn>
> >> Cc: Aaron Li <aaron...@intel.com>
> >> Cc: Liu Yun <yun.y....@intel.com>
> >> Cc: Andrew Fish <af...@apple.com>
> >> Signed-off-by: Michael D Kinney <michael.d.kin...@intel.com>
> >> ---
> >> MdeModulePkg/Core/Dxe/DxeMain.h | 6 ++
> >> MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c | 23 +++---
> >> MdeModulePkg/Core/Dxe/Gcd/Gcd.c | 72 ++++++++++++++++-
> >> MdeModulePkg/Core/Dxe/Mem/Page.c | 101
> >> ++++++++++++++++++++++++
> >> 4 files changed, 190 insertions(+), 12 deletions(-)
> >>
> >> diff --git a/MdeModulePkg/Core/Dxe/DxeMain.h
> >> b/MdeModulePkg/Core/Dxe/DxeMain.h
> >> index 86a7be2f5188..53e26703f8c7 100644
> >> --- a/MdeModulePkg/Core/Dxe/DxeMain.h
> >> +++ b/MdeModulePkg/Core/Dxe/DxeMain.h
> >> @@ -277,6 +277,12 @@ CoreInitializePool (
> >> VOID
> >> );
> >>
> >> +VOID
> >> +CoreSetMemoryTypeInformationRange (
> >> + IN EFI_PHYSICAL_ADDRESS Start,
> >> + IN UINT64 Length
> >> + );
> >> +
> >> /**
> >> Called to initialize the memory map and add descriptors to
> >> the current descriptor list.
> >> diff --git a/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c
> >> b/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c
> >> index 0e0f9769b99d..17d510a287e5 100644
> >> --- a/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c
> >> +++ b/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c
> >> @@ -276,6 +276,18 @@ DxeMain (
> >>
> >> MemoryProfileInit (HobStart);
> >>
> >> + //
> >> + // Start the Image Services.
> >> + //
> >> + Status = CoreInitializeImageServices (HobStart);
> >> + ASSERT_EFI_ERROR (Status);
> >> +
> >> + //
> >> + // Initialize the Global Coherency Domain Services
> >> + //
> >> + Status = CoreInitializeGcdServices (&HobStart, MemoryBaseAddress,
> >> MemoryLength);
> >> + ASSERT_EFI_ERROR (Status);
> >> +
> >> //
> >> // Allocate the EFI System Table and EFI Runtime Service Table
> from
> >> EfiRuntimeServicesData
> >> // Use the templates to initialize the contents of the EFI System
> Table
> > and
> >> EFI Runtime Services Table
> >> @@ -289,16 +301,9 @@ DxeMain (
> >> gDxeCoreST->RuntimeServices = gDxeCoreRT;
> >>
> >> //
> >> - // Start the Image Services.
> >> + // Update DXE Core Loaded Image Protocol with allocated UEFI
> System
> >> Table
> >> //
> >> - Status = CoreInitializeImageServices (HobStart);
> >> - ASSERT_EFI_ERROR (Status);
> >> -
> >> - //
> >> - // Initialize the Global Coherency Domain Services
> >> - //
> >> - Status = CoreInitializeGcdServices (&HobStart, MemoryBaseAddress,
> >> MemoryLength);
> >> - ASSERT_EFI_ERROR (Status);
> >> + gDxeCoreLoadedImage->SystemTable = gDxeCoreST;
> >>
> >> //
> >> // Call constructor for all libraries
> >> diff --git a/MdeModulePkg/Core/Dxe/Gcd/Gcd.c
> >> b/MdeModulePkg/Core/Dxe/Gcd/Gcd.c
> >> index 792cd2e0af23..c450d1bf2531 100644
> >> --- a/MdeModulePkg/Core/Dxe/Gcd/Gcd.c
> >> +++ b/MdeModulePkg/Core/Dxe/Gcd/Gcd.c
> >> @@ -2238,6 +2238,8 @@ CoreInitializeMemoryServices (
> >> EFI_HOB_HANDOFF_INFO_TABLE *PhitHob;
> >> EFI_HOB_RESOURCE_DESCRIPTOR *ResourceHob;
> >> EFI_HOB_RESOURCE_DESCRIPTOR *PhitResourceHob;
> >> + EFI_HOB_RESOURCE_DESCRIPTOR
> >> *MemoryTypeInformationResourceHob;
> >> + UINTN Count;
> >> EFI_PHYSICAL_ADDRESS BaseAddress;
> >> UINT64 Length;
> >> UINT64 Attributes;
> >> @@ -2289,12 +2291,47 @@ CoreInitializeMemoryServices (
> >> //
> >> // See if a Memory Type Information HOB is available
> >> //
> >> - GuidHob = GetFirstGuidHob (&gEfiMemoryTypeInformationGuid);
> >> + MemoryTypeInformationResourceHob = NULL;
> >> + GuidHob = GetFirstGuidHob
> >> (&gEfiMemoryTypeInformationGuid);
> >> if (GuidHob != NULL) {
> >> EfiMemoryTypeInformation = GET_GUID_HOB_DATA (GuidHob);
> >> DataSize = GET_GUID_HOB_DATA_SIZE (GuidHob);
> >> if ((EfiMemoryTypeInformation != NULL) && (DataSize > 0) &&
> (DataSize
> >> <= (EfiMaxMemoryType + 1) * sizeof (EFI_MEMORY_TYPE_INFORMATION))) {
> >> CopyMem (&gMemoryTypeInformation, EfiMemoryTypeInformation,
> >> DataSize);
> >> +
> >> + //
> >> + // Look for Resource Descriptor HOB with a ResourceType of
> System
> >> Memory
> >> + // and an Owner GUID of gEfiMemoryTypeInformationGuid. If more
> >> than 1 is
> >> + // found, then set MemoryTypeInformationResourceHob to NULL.
> >> + //
> >> + Count = 0;
> >> + for (Hob.Raw = *HobStart; !END_OF_HOB_LIST (Hob); Hob.Raw =
> >> GET_NEXT_HOB (Hob)) {
> >> + if (GET_HOB_TYPE (Hob) !=
> >> EFI_HOB_TYPE_RESOURCE_DESCRIPTOR) {
> >> + continue;
> >> + }
> >> +
> >> + ResourceHob = Hob.ResourceDescriptor;
> >> + if (!CompareGuid (&ResourceHob->Owner,
> >> &gEfiMemoryTypeInformationGuid)) {
> >> + continue;
> >> + }
> >> +
> >> + Count++;
> >> + if (ResourceHob->ResourceType !=
> >> EFI_RESOURCE_SYSTEM_MEMORY) {
> >> + continue;
> >> + }
> >> +
> >> + if ((ResourceHob->ResourceAttribute &
> >> MEMORY_ATTRIBUTE_MASK) != TESTED_MEMORY_ATTRIBUTES) {
> >> + continue;
> >> + }
> >> +
> >> + if (ResourceHob->ResourceLength >=
> >> CalculateTotalMemoryBinSizeNeeded ()) {
> >> + MemoryTypeInformationResourceHob = ResourceHob;
> >> + }
> >> + }
> >> +
> >> + if (Count > 1) {
> >> + MemoryTypeInformationResourceHob = NULL;
> >> + }
> >> }
> >> }
> >>
> >> @@ -2344,6 +2381,15 @@ CoreInitializeMemoryServices (
> >> PhitResourceHob = ResourceHob;
> >> Found = TRUE;
> >>
> >> + //
> >> + // If a Memory Type Information Resource HOB was found and is
> the
> >> same
> >> + // Resource HOB that describes the PHIT HOB, then ignore the
> Memory
> >> Type
> >> + // Information Resource HOB.
> >> + //
> >> + if (MemoryTypeInformationResourceHob == PhitResourceHob) {
> >> + MemoryTypeInformationResourceHob = NULL;
> >> + }
> >> +
> >> //
> >> // Compute range between PHIT EfiMemoryTop and the end of the
> >> Resource Descriptor HOB
> >> //
> >> @@ -2387,8 +2433,9 @@ CoreInitializeMemoryServices (
> >> if (Length < MinimalMemorySizeNeeded) {
> >> //
> >> // Search all the resource descriptor HOBs from the highest
> possible
> >> addresses down for a memory
> >> - // region that is big enough to initialize the DXE core. Always
> skip
> > the
> >> PHIT Resource HOB.
> >> - // The max address must be within the physically addressible
> range
> > for
> >> the processor.
> >> + // region that is big enough to initialize the DXE core. Always
> skip
> > the
> >> PHIT Resource HOB
> >> + // and the Memory Type Information Resource HOB. The max address
> >> must be within the physically
> >> + // addressable range for the processor.
> >> //
> >> HighAddress = MAX_ALLOC_ADDRESS;
> >> for (Hob.Raw = *HobStart; !END_OF_HOB_LIST (Hob); Hob.Raw =
> >> GET_NEXT_HOB (Hob)) {
> >> @@ -2399,6 +2446,13 @@ CoreInitializeMemoryServices (
> >> continue;
> >> }
> >>
> >> + //
> >> + // Skip the Resource Descriptor HOB that contains Memory Type
> >> Information bins
> >> + //
> >> + if (Hob.ResourceDescriptor ==
> MemoryTypeInformationResourceHob)
> >> {
> >> + continue;
> >> + }
> >> +
> >> //
> >> // Skip all HOBs except Resource Descriptor HOBs
> >> //
> >> @@ -2466,6 +2520,18 @@ CoreInitializeMemoryServices (
> >> Capabilities =
> >> CoreConvertResourceDescriptorHobAttributesToCapabilities
> >> (EfiGcdMemoryTypeSystemMemory, Attributes);
> >> }
> >>
> >> + if (MemoryTypeInformationResourceHob != NULL) {
> >> + //
> >> + // If a Memory Type Information Resource HOB was found, then use
> the
> >> address
> >> + // range of the Memory Type Information Resource HOB as the
> >> preferred
> >> + // address range for the Memory Type Information bins.
> >> + //
> >> + CoreSetMemoryTypeInformationRange (
> >> + MemoryTypeInformationResourceHob->PhysicalStart,
> >> + MemoryTypeInformationResourceHob->ResourceLength
> >> + );
> >> + }
> >> +
> >> //
> >> // Declare the very first memory region, so the EFI Memory
> Services are
> >> available.
> >> //
> >> diff --git a/MdeModulePkg/Core/Dxe/Mem/Page.c
> >> b/MdeModulePkg/Core/Dxe/Mem/Page.c
> >> index 6497af573353..458c62090265 100644
> >> --- a/MdeModulePkg/Core/Dxe/Mem/Page.c
> >> +++ b/MdeModulePkg/Core/Dxe/Mem/Page.c
> >> @@ -532,6 +532,107 @@ CoreLoadingFixedAddressHook (
> >> return;
> >> }
> >>
> >> +/**
> >> + Sets the preferred memory range to use for the Memory Type
> Information
> >> bins.
> >> + This service must be called before fist call to
> > CoreAddMemoryDescriptor().
> >> +
> >> + If the location of the Memory Type Information bins has already
> been
> >> + established or the size of the range provides is smaller than all
> the
> >> + Memory Type Information bins, then the range provides is not used.
> >> +
> >> + @param Start The start address of the Memory Type Information
> >> range.
> >> + @param Length The size, in bytes, of the Memory Type Information
> >> range.
> >> +**/
> >> +VOID
> >> +CoreSetMemoryTypeInformationRange (
> >> + IN EFI_PHYSICAL_ADDRESS Start,
> >> + IN UINT64 Length
> >> + )
> >> +{
> >> + EFI_PHYSICAL_ADDRESS Top;
> >> + EFI_MEMORY_TYPE Type;
> >> + UINTN Index;
> >> + UINTN Size;
> >> +
> >> + //
> >> + // Return if Memory Type Information bin locations have already
> been
> > set
> >> + //
> >> + if (mMemoryTypeInformationInitialized) {
> >> + return;
> >> + }
> >> +
> >> + //
> >> + // Return if size of the Memory Type Information bins is greater
> than
> >> Length
> >> + //
> >> + Size = 0;
> >> + for (Index = 0; gMemoryTypeInformation[Index].Type !=
> >> EfiMaxMemoryType; Index++) {
> >> + //
> >> + // Make sure the memory type in the gMemoryTypeInformation[]
> array
> >> is valid
> >> + //
> >> + Type = (EFI_MEMORY_TYPE)(gMemoryTypeInformation[Index].Type);
> >> + if ((UINT32)Type > EfiMaxMemoryType) {
> >> + continue;
> >> + }
> >> +
> >> + Size += EFI_PAGES_TO_SIZE
> >> (gMemoryTypeInformation[Index].NumberOfPages);
> >> + }
> >> +
> >> + if (Size > Length) {
> >> + return;
> >> + }
> >> +
> >> + //
> >> + // Loop through each memory type in the order specified by the
> >> + // gMemoryTypeInformation[] array
> >> + //
> >> + Top = Start + Length;
> >> + for (Index = 0; gMemoryTypeInformation[Index].Type !=
> >> EfiMaxMemoryType; Index++) {
> >> + //
> >> + // Make sure the memory type in the gMemoryTypeInformation[]
> array
> >> is valid
> >> + //
> >> + Type = (EFI_MEMORY_TYPE)(gMemoryTypeInformation[Index].Type);
> >> + if ((UINT32)Type > EfiMaxMemoryType) {
> >> + continue;
> >> + }
> >> +
> >> + if (gMemoryTypeInformation[Index].NumberOfPages != 0) {
> >> + mMemoryTypeStatistics[Type].MaximumAddress = Top - 1;
> >> + Top -=
> >> EFI_PAGES_TO_SIZE (gMemoryTypeInformation[Index].NumberOfPages);
> >> + mMemoryTypeStatistics[Type].BaseAddress = Top;
> >> +
> >> + //
> >> + // If the current base address is the lowest address so far,
> then
> >> update
> >> + // the default maximum address
> >> + //
> >> + if (mMemoryTypeStatistics[Type].BaseAddress <
> >> mDefaultMaximumAddress) {
> >> + mDefaultMaximumAddress =
> >> mMemoryTypeStatistics[Type].BaseAddress - 1;
> >> + }
> >> +
> >> + mMemoryTypeStatistics[Type].NumberOfPages =
> >> gMemoryTypeInformation[Index].NumberOfPages;
> >> + gMemoryTypeInformation[Index].NumberOfPages = 0;
> >> + }
> >> + }
> >> +
> >> + //
> >> + // If the number of pages reserved for a memory type is 0, then
> all
> >> + // allocations for that type should be in the default range.
> >> + //
> >> + for (Type = (EFI_MEMORY_TYPE)0; Type < EfiMaxMemoryType; Type++) {
> >> + for (Index = 0; gMemoryTypeInformation[Index].Type !=
> >> EfiMaxMemoryType; Index++) {
> >> + if (Type ==
> >> (EFI_MEMORY_TYPE)gMemoryTypeInformation[Index].Type) {
> >> + mMemoryTypeStatistics[Type].InformationIndex = Index;
> >> + }
> >> + }
> >> +
> >> + mMemoryTypeStatistics[Type].CurrentNumberOfPages = 0;
> >> + if (mMemoryTypeStatistics[Type].MaximumAddress ==
> >> MAX_ALLOC_ADDRESS) {
> >> + mMemoryTypeStatistics[Type].MaximumAddress =
> >> mDefaultMaximumAddress;
> >> + }
> >> + }
> >> +
> >> + mMemoryTypeInformationInitialized = TRUE;
> >> +}
> >> +
> >> /**
> >> Called to initialize the memory map and add descriptors to
> >> the current descriptor list.
> >> --
> >> 2.40.1.windows.1
> >
> >
> >
> >
> >
> >
> >
> >
-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#114347): https://edk2.groups.io/g/devel/message/114347
Mute This Topic: https://groups.io/mt/103933112/21656
Group Owner: devel+ow...@edk2.groups.io
Unsubscribe:
https://edk2.groups.io/g/devel/leave/9847357/21656/1706620634/xyzzy
[arch...@mail-archive.com]
-=-=-=-=-=-=-=-=-=-=-=-
