regions_mm: New memory mapping functions#9114
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kv2019i merged 2 commits intothesofproject:mainfrom May 24, 2024
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A macro was used to statically initialize the vmh_list list head. This allowed to resign from calling a function whose only task was to initialize the list header. This function was removed as no needed anymore. Signed-off-by: Adrian Warecki <adrian.warecki@intel.com>
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lyakh
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May 13, 2024
dabekjakub
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May 13, 2024
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Changes look good I would like more commentary since this is complex code.
lgirdwood
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LGTM, @softwarecki do you think we will need to update the vmh ztests or are the existing ztests providing coverage for this update ?
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@lgirdwood There is no need to extend vmh ztests. This PR does not add any new functionality, it only fixes bugs. Before merge let my apply @lyakh comments. |
The previous memory mapping function did not work properly if the buffer size exceeded the memory page size. In this case the size of the region to be checked passed to the sys_bitarray_is_region_cleared function was zero, causing the function to always return false. As a result, the allocator stated that a page was already mapped for a given address and did not map it. This led to a cpu exception when trying to access the allocated buffer. The function responsible for unmapping memory had a similar problem. Additionally, the size of the freed area was incorrectly determined and an incorrect offset was passed to the sys_bitarray_is_region_cleared function. New functions have been created to map and unmap memory pages for allocated buffers. It don't need allocation of temporary array and manipulation of memblocks bitarray. Signed-off-by: Adrian Warecki <adrian.warecki@intel.com>
lyakh
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May 17, 2024
pjdobrowolski
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May 21, 2024
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SOFCI TEST |
lgirdwood
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May 22, 2024
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@dabekjakub good to go? This seems to be ready for merge now. |
dabekjakub
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May 24, 2024
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The previous memory mapping function did not work properly if the buffer size exceeded the memory page size. In this case the size of the region to be checked passed to the
sys_bitarray_is_region_clearedfunction was zero, causing the function to always return false. As a result, the allocator stated that a page was already mapped for a given address and did not map it. This led to a cpu exception when trying to access the allocated buffer.The function responsible for unmapping memory had a similar problem. Additionally, the size of the freed area was incorrectly determined and an incorrect offset was passed to the
sys_bitarray_is_region_clearedfunction.New functions have been created to map and unmap memory pages for allocated buffers. It don't need allocation of temporary array and manipulation of memblocks bitarray.
Used static initialization of the vmh_list list head using macro.