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Diffstat (limited to 'Documentation/arch')
| -rw-r--r-- | Documentation/arch/x86/index.md | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/arch/x86/index.md b/Documentation/arch/x86/index.md index 536dea3951..30dcc10e91 100644 --- a/Documentation/arch/x86/index.md +++ b/Documentation/arch/x86/index.md @@ -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 |