AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
Linux kernel page table walk12/5/2023 ![]() Second Level Address Translation ( SLAT) or nested paging is an extended layer in the paging mechanism used to map hardware-based virtualization virtual addresses into the physical memory.ĪMD implemented SLAT through the Rapid Virtualization Indexing (RVI) technology known as Nested Page Tables (NPT) since the introduction of its third-generation Opteron processors and microarchitecture code name Barcelona. ![]() In part 7, we used the concept we learned here to implement EPT on an already virtualized system. The main implementation of EPT for our hypervisor is explained in part 7. Note: This part tends to give you basic information about EPT. The full source code of this tutorial is available on GitHub :īefore starting, I should give my thanks to Petr Beneš, as this part would never have been completed without his help. Most of this topic is derived from Chapter 28 - ( VMX SUPPORT FOR ADDRESS TRANSLATION) available at Intel 64 and IA-32 architectures software developer’s manual combined volumes 3. A good article is here for paging tables. It would help if you also had a basic understanding of the paging mechanism and how page tables work. ![]() Shadow Page Tableįirst of all, make sure to read the earlier parts before reading this topic, as these parts depend on each other. Hardware-assisted paging (Extended Page Table).Software-assisted paging (Shadow Page Tables).Second Level Address Translation (SLAT).We also see how shadow tables work and basic concepts about EPT. This part primarily involves translating guest addresses through Extended Page Table (EPT) and its implementation. Welcome to the 4th part of the “ Hypervisor From Scratch”.
0 Comments
Read More
Leave a Reply. |