linux-toradex.git/tools/testing/memblock/asm, branch master Linux kernel for Apalis and Colibri modules memblock tests: model the low allocation limit within dummy memory 2026-09-10T10:10:20+00:00 Tianyi Chen hi@tychen.cc 2026-09-09T23:55:28+00:00 f68c01000a6c3bddbf415b6e50a201196ec78358 The simulator represents physical addresses using the address of its allocated buffer. That buffer can lie above the default ARCH_LOW_ADDRESS_LIMIT, preventing meaningful memblock_alloc_low() tests. Use the architecture override in asm/dma.h to place the limit halfway through the memory registered by setup_memblock(). Resolve the limit after allocating the buffer, leaving registered memory on both sides. Assisted-by: LLM Signed-off-by: Tianyi Chen <hi@tychen.cc> Link: https://patch.msgid.link/f16c272cd52316b83c35d87987b4d8687c4a3182.1788997523.git.hi@tychen.cc Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org> 
The simulator represents physical addresses using the address of its
allocated buffer. That buffer can lie above the default
ARCH_LOW_ADDRESS_LIMIT, preventing meaningful memblock_alloc_low()
tests.

Use the architecture override in asm/dma.h to place the limit halfway
through the memory registered by setup_memblock(). Resolve the limit
after allocating the buffer, leaving registered memory on both sides.

Assisted-by: LLM
Signed-off-by: Tianyi Chen <hi@tychen.cc>
Link: https://patch.msgid.link/f16c272cd52316b83c35d87987b4d8687c4a3182.1788997523.git.hi@tychen.cc
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
memblock tests: Add skeleton of the memblock simulator 2022-02-20T06:44:37+00:00 Karolina Drobnik karolinadrobnik@gmail.com 2022-02-02T11:03:09+00:00 16802e55dea9534c18a30bd8eeefea8a06337916 Add basic project files, together with local stubs of required headers. Update tools/include/slab.h to include definitions used by memblock. Signed-off-by: Karolina Drobnik <karolinadrobnik@gmail.com> Signed-off-by: Mike Rapoport <rppt@kernel.org> Link: https://lore.kernel.org/r/d296fceb023a04b316a31fbff9acf1e76ac684e4.1643796665.git.karolinadrobnik@gmail.com 
Add basic project files, together with local stubs of required headers.
Update tools/include/slab.h to include definitions used by memblock.

Signed-off-by: Karolina Drobnik <karolinadrobnik@gmail.com>
Signed-off-by: Mike Rapoport <rppt@kernel.org>
Link: https://lore.kernel.org/r/d296fceb023a04b316a31fbff9acf1e76ac684e4.1643796665.git.karolinadrobnik@gmail.com