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-rw-r--r--Documentation/arch/x86/index.md9
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@@ -49,6 +49,15 @@ At the moment *$n* is 4, which results in identity mapping the lower 4 GiB.
* Add assembly code to return to protected mode - *TODO*
* Implement reference code for mainboard `emulation/qemu-q35` - *TODO*
+## Future work
+
+1. Fine grained page tables for SMM:
+ * Must not have execute and write permissions for the same page.
+ * Must allow only that TSEG pages can be marked executable
+ * Must reside in SMRAM
+2. Support 64bit PCI BARs above 4GiB
+3. Place and run code above 4GiB
+
## Porting other boards
* Fix compilation errors
* Test how well CAR works with x86_64 and paging