Re:Writing to the Framebuffer
by vardump on Wednesday April 04, 2018 @06:53PM
(#16760069)
Well, if you're root... and configure IOMMU in such a way, etc.
Otherwise, it simply depends on system hardware architecture and drivers.
If the GPU is in a position to read and write physical memory (bus master DMA), and there's no hardware level protection like IOMMU or it's not properly configured, operating system has very little say in the matter, be it Linux or anything else.
Otherwise, it simply depends on system hardware architecture and drivers.
If the GPU is in a position to read and write physical memory (bus master DMA), and there's no hardware level protection like IOMMU or it's not properly configured, operating system has very little say in the matter, be it Linux or anything else.