1. 解释/dev/dma_heap/system-uncached-dma32的含义 /dev/dma_heap/system-uncached-dma32是一个特殊的设备文件,在Linux系统中用于访问特定的DMA(Direct Memory Access)内存区域。这里的dma_heap指的是DMA内存堆,而system-uncached-dma32则指定了这个堆的特性:它是系统级的、未缓存的、且地址空间为32位。这样的...
Keep track of the heap device struct. This will be useful for special DMA allocations and actions. Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: Liam Mark <lmark@codeaurora.org> Cc: Laura Abbott <labbott@kernel.org> Cc: Brian Starkey <Brian.Starkey@arm.com> Cc: Hridya Valsaraju <h...
Description:增加renderserivce 访问安全内存属组dev_dma_heapIssue number:https://gitee.com/openharmony/graphi...
usestd::os::unix::io::OwnedFd;usedma_heap::{Heap,HeapKind};letheap =Heap::new(HeapKind::Cma).unwrap();// Buffer will automatically be freed when `buffer` goes out of scope.letbuffer:OwnedFd= heap.allocate(1024).unwrap();
After switching from Kernel 5.15.52 to Kernel 6.6 I recognized that the devices /dev/dma_heap/linux,cma and /dev/dma_heap/linux,cma-uncached were renamed to /dev/dma_heap/reserved and /dev/dma_heap/reserved-uncached Why? Where can I change this back? Labels: i.MX 8M | ...
在安卓系统中,DMA BUF 堆常用于实现图像传输。例如,一个摄像头设备可以将采集到的图像数据存储在 DMA BUF 堆中,然后其他设备(如显示器、图像处理单元)可以直接从该 DMA BUF 堆中读取图像数据,无需复制。 工作原理 1.摄像头设备采集图像数据,并将其存储在 DMA BUF 堆中。 2.图像处理单元从 DMA BUF 堆中读取...
MEM: ERROR: Failed to initialize DMA HEAP [/dev/dma_heap/vision_apps_shared-memories] !!! MEM: Init ... Done !!! APP: ERROR: Memory init failed !!! APP: Init ... Done !!! Did I miss anything ? regards, Victor 4 年多前 ...
申请dma_buf时传入的heap_flags不需要等于0 如何复现该缺陷 申请dma_buf时传入的heap_flags不需要等于0 其他补充信息 版本或分支信息 master Release 4.1 Release 4.0 Release 3.2 周梦杰 创建了任务 1年前 周梦杰 添加了 bug 标签 1年前 展开全部操作日志 openharmony_ci 成员 1年前 感谢提交Issue!关于...
Got a heap-buffer-overflow error when fuzzing the device am53c974. Steps to reproduce Minimized reproducer: cat << EOF | ./qemu-system-x86_64 -display none -machine accel=qtest, -m 512M -device \am53c974,id=scsi -device scsi-hd,drive=disk0 -drive \id=disk0,if=none,file=null-co...
const DMA_HEAP_IOC_MAGIC: u8 = b'H'; const DMA_HEAP_IOC_ALLOC: u8 = 0; #[derive(Default)] #[repr(C)] pub struct dma_heap_allocation_data { pub len: u64, pub fd: u32, pub fd_flags: u32, pub heap_flags: u64, } ioctl_readwrite!( dma_heap_alloc, DMA_HEAP_IOC_MAGIC,...