This is part two of the series to have the EFI and LMB modules have a coherent view of memory. Part one of this goal was to change the LMB module to have a global and persistent memory map. Those patches have now been applied to the next branch.
These patches are changing the EFI memory allocation API's such that they rely on the LMB module to allocate RAM memory. This fixes the current scenario where the EFI memory module has no visibility of the allocations/reservations made by the LMB module. One thing to note here is that this is limited to the RAM memory region, i.e. the EFI_CONVENTIONAL_MEMORY type. Any other memory type that is to be added to the EFI memory map, still gets handled by the EFI memory module.
Changes since V1: * Add comments for the API's added * Add a config for SPL stage * Call the efi_add_memory_map_pg() function directly from the lmb_map_update_notify() instead of doing it through the event framework. * Call the efi_add_memory_map_pg() with overlap_only_ram argument set to false, to allow for overlapping allocation design of LMB. * Use the return value of lmb_map_update_notify() at it's call sites * Do not remove the inclusion of efi_loader.h as it is now needed for the lmb_map_update_notify()
Sughosh Ganu (14): lmb: add versions of the lmb API with flags lmb: add a flag to allow suppressing memory map change notification efi: memory: use the lmb API's for allocating and freeing memory lib: Kconfig: add a config symbol for getting lmb memory map updates add a function to check if an address is in RAM memory lmb: notify of any changes to the LMB memory map ti: k3: remove efi_add_known_memory() function definition stm32mp: remove efi_add_known_memory() function definition lmb: allow for boards to specify memory map layerscape: use the lmb API's to add RAM memory x86: e820: use the lmb API for adding RAM memory efi_memory: do not add RAM memory to the memory map lmb: remove call to efi_lmb_reserve() efi_memory: rename variable to highlight overlap with free memory
arch/arm/cpu/armv8/fsl-layerscape/cpu.c | 8 +- arch/arm/mach-k3/common.c | 11 -- arch/arm/mach-stm32mp/dram_init.c | 11 -- arch/x86/lib/e820.c | 47 +++-- common/board_r.c | 5 + include/efi_loader.h | 27 ++- include/lmb.h | 61 +++++++ lib/Kconfig | 36 ++++ lib/efi_loader/Kconfig | 2 + lib/efi_loader/efi_memory.c | 202 ++++++---------------- lib/lmb.c | 220 +++++++++++++++++++----- 11 files changed, 398 insertions(+), 232 deletions(-)