Tianocore/edk2.git/MdeModulePkg/Core, branch master

MdeModulePkg: DxeIpl: Don't Duplicate Mem Alloc Hob for Stack

2026-09-03T09:00:37+00:00

Currently, DxeIpl will allocate memory for the new DXE stack, which creates a memory allocation HOB for that region. It will then call UpdateStackHob() to find the stack HOB with the old stack info and update the memory address/length to correspond to the new stack. It then creates a new memory allocation HOB for the old stack region as it needs to remain mapped. This ends up creating two memory allocation HOBs for the new stack: a regular memory allocation HOB for the AllocatePages() call and then the stack HOB (which is a memory allocation HOB with a special name). When DXE Core ingests these, it will ignore one of the two HOBs when it goes to allocate memory. However, this is incorrectly describing handoff state. There never should be overlapping memory allocation HOBs. This commit updates DxeIpl behavior to instead find the old stack HOB, convert it to a regular memory allocation HOB, then find the memory allocation HOB for the new stack range and convert it into the stack HOB. Signed-off-by: Oliver Smith-Denny

MdeModulePkg/Core/Dxe: Add interrupt-enable nesting guard

2026-08-25T23:36:26+00:00

Add interrupt-enable recursion depth tracking using mInterruptEnableNestDepth and a bounded assertion in CoreSetInterruptState(). This provides early detection for unintended recursive interrupt-enable loops. Signed-off-by: Michael D Kinney

MdeModulePkg/Core/Dxe: Refactor CoreSetInterruptState enable path

2026-08-25T23:36:26+00:00

Refactor the CoreSetInterruptState(TRUE) flow so EnableInterrupt() is invoked through a single call site. Behavior is unchanged: interrupts remain disabled in SMM and are enabled outside SMM. Signed-off-by: Michael D Kinney

MdeModulePkg: MemoryBins: make GoogleTest page-granularity aware

2026-07-31T15:16:47+00:00

MemoryBinGoogleTest.PopulatesFromValidHob asserted fixed page counts for each memory type. PopulateMemoryTypeInformation, however, rounds the runtime memory types (EfiReservedMemoryType, EfiACPIMemoryNVS, EfiRuntimeServicesCode, EfiRuntimeServicesData) up to RUNTIME_PAGE_ALLOCATION_GRANULARITY. That granularity equals EFI_PAGE_SIZE on IA32/X64, so the hard-coded values happened to match, but it is 64 KiB on AArch64, where the same inputs round up to different page counts and the test failed. Compute the expected page counts with the same granularity rounding the production code uses, so the test passes on all host architectures instead of only x86. Signed-off-by: Jeff Brasen

MdeModulePkg: Dxe Core: Correct gMemoryTypeInformation Definition

2026-07-09T12:46:51+00:00

Commit 43e306806e3c1ed3ad7e9913492732e893cafa0f added support to DXE Core for EfiUnacceptedMemoryType. However, it incorrectly added EFI_GCD_MEMORY_TYPE_UNACCEPTED to gMemoryTypeInformation, which is the GCD memory type that is associated with EfiUnacceptedMemoryType. All other changes from that PR appear correct. This is corrected to the EFI memory type. The Memory Bin Google Test copied this incorrect definition, so it is updated as well. Signed-off-by: Oliver Smith-Denny

MdeModulePkg: MemoryBins: Add GoogleTest and README

2026-06-24T15:53:58+00:00

This commit adds unit tests and documentation for the Memory Bin feature. Signed-off-by: Oliver Smith-Denny

MdeModulePkg: DxeCore: Update Memory Statistics from PEI

2026-06-24T15:53:58+00:00

If memory bins are enabled for PEI, PEI will produce Memory Allocation HOBs marked with gEfiMemoryTypeInformationGuid. If these exist, DXE core will now process the stats from them to have accurate numbers. Signed-off-by: Oliver Smith-Denny

MdeModulePkg: PeiCore: Add Memory Bin Support to Post-Mem PEI

2026-06-24T15:53:58+00:00

This commit adds opt-in support for post-mem PEI memory bins. See the README for full details. MemoryBin.c is duplicated to PeiCore per request. Signed-off-by: Oliver Smith-Denny

MdeModulePkg: Dxe Core: Split Memory Bin Logic Into Separate File

2026-06-24T15:53:58+00:00

This commits splits out logic currently contained in Gcd.c and Page.c to a new file called MemoryBin.c. This is set up in preparation to add support to PEI for memory bins (an S4 resume stability feature). MemoryBin.c takes all global state in as parameters so that DXE core can use globals and PEI core can use HOBs. There is no logic change here, just consolidating the functionality to share with PEI. This was requested not to be a library. Signed-off-by: Oliver Smith-Denny

MdeModulePkg: Dxe Core: Add Resource Desc Hob Generation

2026-06-24T15:53:58+00:00

This commit adds a parameter to the memory bin allocation function to tell it whether it should create the Resource Descriptor HOB owned by gMemoryTypeInformationGuid. This will be used by PEI to tell DXE where the memory bins are. Signed-off-by: Oliver Smith-Denny