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 V3: * Add comments for the LMB_NOOVERWRITE and LMB_NONOTIFY flags * Drop use of is_addr_in_ram() function * Drop use of CONFIG_MEM_MAP_UPDATE_NOTIFY symbol to check if the notification needs to be sent. * s/lmb_notify/lmb_should_notify * Put a check for EFI_LOADER in the lmb_should_notify() function
Some test logs to highlight the issue that is being fixed by the series.
Without patch series --------------------
lmb_dump_all: memory.count = 0x1 memory[0] [0x40000000-0x820fffff], 0x42100000 bytes flags: none reserved.count = 0x3 reserved[0] [0xe100000-0xeffffff], 0x00f00000 bytes flags: no-map reserved[1] [0x42000000-0x421fffff], 0x00200000 bytes flags: no-map reserved[2] [0x7f77da00-0x820fffff], 0x02982600 bytes flags: no-overwrite
=> efidebug memmap -- does not show regions allocated by lmb
Missing TPMv2 device for EFI_TCG_PROTOCOL Type Start End Attributes ================ ================ ================ ========== CONVENTIONAL 0000000040000000-000000007f751000 WB BOOT DATA 000000007f751000-000000007f756000 WB RUNTIME DATA 000000007f756000-000000007f757000 WB|RT BOOT DATA 000000007f757000-000000007f758000 WB RUNTIME DATA 000000007f758000-000000007f77a000 WB|RT BOOT DATA 000000007f77a000-000000007f781000 WB BOOT CODE 000000007f781000-00000000807b5000 WB RUNTIME DATA 00000000807b5000-00000000807b6000 WB|RT BOOT CODE 00000000807b6000-00000000817c0000 WB RUNTIME CODE 00000000817c0000-00000000817d0000 WB|RT BOOT CODE 00000000817d0000-0000000082100000 WB =>
Trying to allocate EFI memory with already allocated region succeeds(should fail) ---------------------------------------------------------------------------------
=> efi_mem alloc 2000 42000000 Address returned 0x42000000
=> efidebug memmap Type Start End Attributes ================ ================ ================ ========== CONVENTIONAL 0000000040000000-0000000042000000 WB BOOT DATA 0000000042000000-0000000042002000 WB CONVENTIONAL 0000000042002000-000000007f751000 WB BOOT DATA 000000007f751000-000000007f756000 WB RUNTIME DATA 000000007f756000-000000007f757000 WB|RT BOOT DATA 000000007f757000-000000007f758000 WB RUNTIME DATA 000000007f758000-000000007f77a000 WB|RT BOOT DATA 000000007f77a000-000000007f781000 WB BOOT CODE 000000007f781000-00000000807b5000 WB RUNTIME DATA 00000000807b5000-00000000807b6000 WB|RT BOOT CODE 00000000807b6000-00000000817c0000 WB RUNTIME CODE 00000000817c0000-00000000817d0000 WB|RT BOOT CODE 00000000817d0000-0000000082100000 WB =>
With patch series -----------------
lmb_dump_all: memory.count = 0x1 memory[0] [0x40000000-0x820fffff], 0x42100000 bytes flags: none reserved.count = 0x4 reserved[0] [0xe100000-0xeffffff], 0x00f00000 bytes flags: no-map reserved[1] [0x42000000-0x421fffff], 0x00200000 bytes flags: no-map reserved[2] [0x7f74f000-0x7f77dfff], 0x0002f000 bytes flags: no-notify, no-overwrite reserved[3] [0x7f77ea00-0x820fffff], 0x02981600 bytes flags: no-overwrite
=> efidebug memmap Type Start End Attributes ================ ================ ================ ========== BOOT DATA 000000000e100000-000000000f000000 WB CONVENTIONAL 0000000040000000-0000000042000000 WB BOOT DATA 0000000042000000-0000000042200000 WB CONVENTIONAL 0000000042200000-000000007f74e000 WB BOOT DATA 000000007f74e000-000000007f753000 WB RUNTIME DATA 000000007f753000-000000007f754000 WB|RT BOOT DATA 000000007f754000-000000007f755000 WB RUNTIME DATA 000000007f755000-000000007f777000 WB|RT BOOT DATA 000000007f777000-00000000807b6000 WB RUNTIME DATA 00000000807b6000-00000000807b7000 WB|RT BOOT DATA 00000000807b7000-00000000817c0000 WB RUNTIME CODE 00000000817c0000-00000000817d0000 WB|RT BOOT DATA 00000000817d0000-0000000082100000 WB
Trying to allocate EFI memory with already allocated region fails -----------------------------------------------------------------
=> efi_mem alloc 2000 42000000 efi_allocate_pages failed 800000000000000e =>
Trying to allocate EFI memory with non-allocated region succeeds ----------------------------------------------------------------
=> efi_mem alloc 2000 42200000 Address returned 0x42200000
=> efidebug memmap Type Start End Attributes ================ ================ ================ ========== BOOT DATA 000000000e100000-000000000f000000 WB CONVENTIONAL 0000000040000000-0000000042000000 WB BOOT DATA 0000000042000000-0000000042202000 WB CONVENTIONAL 0000000042202000-000000007f74d000 WB BOOT DATA 000000007f74d000-000000007f752000 WB RUNTIME DATA 000000007f752000-000000007f753000 WB|RT BOOT DATA 000000007f753000-000000007f754000 WB RUNTIME DATA 000000007f754000-000000007f776000 WB|RT BOOT DATA 000000007f776000-00000000807b5000 WB RUNTIME DATA 00000000807b5000-00000000807b6000 WB|RT BOOT DATA 00000000807b6000-00000000817c0000 WB RUNTIME CODE 00000000817c0000-00000000817d0000 WB|RT BOOT DATA 00000000817d0000-0000000082100000 WB =>
lmb_dump_all: memory.count = 0x1 memory[0] [0x40000000-0x820fffff], 0x42100000 bytes flags: none reserved.count = 0x5 reserved[0] [0xe100000-0xeffffff], 0x00f00000 bytes flags: no-map reserved[1] [0x42000000-0x421fffff], 0x00200000 bytes flags: no-map reserved[2] [0x42200000-0x42201fff], 0x00002000 bytes flags: no-notify, no-overwrite reserved[3] [0x7f74e000-0x7f77cfff], 0x0002f000 bytes flags: no-notify, no-overwrite reserved[4] [0x7f77da00-0x820fffff], 0x02982600 bytes flags: no-overwrite
Sughosh Ganu (15): lmb: add versions of the lmb API with flags lmb: add a flag to allow suppressing memory map change notification lmb: add and reserve memory above ram_top efi: memory: use the lmb API's for allocating and freeing memory lmb: notify of any changes to the LMB memory map efi_memory: do not add U-Boot memory to the 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 lmb: replace the double-underscore with single-underscore for all functions
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 +++-- include/efi_loader.h | 27 ++- include/lmb.h | 63 ++++++ lib/Kconfig | 19 ++ lib/efi_loader/Kconfig | 1 + lib/efi_loader/efi_memory.c | 217 ++++++--------------- lib/lmb.c | 242 ++++++++++++++++++------ 10 files changed, 389 insertions(+), 257 deletions(-)