Yu-Ping Wu b4f2a51533 libpayload/arch/arm64/mmu: Fix missing CBMEM in used ranges ... We use mmu_ranges to track the list of memory ranges and their types for MMU initialization. We also keep track of used memory ranges in usedmem_ranges, to avoid them from being re-allocated in mmu_alloc_range(). The problem is, the CBMEM range (CB_MEM_TABLE) is added to mmu_ranges, but is never marked as "used" in usedmem_ranges. This potentially causes any allocation (for example the framebuffer) to overlap with CBMEM. This issue is observed when DMA_DEFAULT_SIZE is reduced from 32MB to 1MB [1]. Prior to that change, because there isn't enough space above the coreboot table (with the 4GB upper limit) to fit the 32MB requested region, the DMA heap is always allocated *below* the coreboot table. And because the coreboot table is usually the lowest within CBMEM, the DMA heap region is allocated *below* the whole CBMEM, which happens the avoid the issue. Fix the bug by adding CB_MEM_TABLE ranges to usedmem_ranges. The ranges in usedmem_ranges don't need to be combined because they are not for MMU initialization (and there's only one CB_MEM_TABLE range). [1] commit aedc177f00 ("libpayload: arm64: Reduce DMA allocator space to 1MB") BUG=b:424107889 TEST=emerge-skywalker libpayload BRANCH=none Change-Id: Ie9ecafc17546e524253c60ab684ec10ff3495998 Signed-off-by: Yu-Ping Wu <yupingso@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/88063 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Bartłomiej Grzesik <bgrzesik@google.com> Reviewed-by: Jakub "Kuba" Czapiga <czapiga@google.com>		2025-06-13 15:23:09 +00:00
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cache.c
coreboot.c
cpu.S	libpayload/arm64: Support FEAT_CCIDX	2024-06-05 11:09:16 +00:00
exception.c
exception_asm.S
gdb.c
head.S
Kconfig	libpayload: Use Kconfig for architecture memcpy, not weak symbols	2025-05-22 19:27:24 +00:00
libpayload.ldscript
main.c
Makefile.mk	libpayload: Unify selfboot() implementations	2025-02-11 20:59:57 +00:00
memcpy.S
memmove.S
memset.S
mmu.c	libpayload/arch/arm64/mmu: Fix missing CBMEM in used ranges	2025-06-13 15:23:09 +00:00
sysinfo.c
timer.c
util.S
virtual.c