# Intel Firmware Support Package (FSP)-specific documentation This section contains documentation about Intel-FSP in public domain. ## Bugs As Intel doesn't even list known bugs, they are collected here until those are fixed. If possible a workaround is described here as well. ### BroadwellDEFsp * IA32_FEATURE_CONTROL MSR is locked in FSP-M * Release MR2 * Writing the MSR is required in ramstage for Intel TXT * Workaround: none * Issue on public tracker: [Issue 10] * FSP-S asserts if the thermal PCI device 00:1f.6 is disabled * Release MR2 * FSP expects the PCI device to be enabled * FSP expects BARs to be properly assigned * Workaround: Don't disable this PCI device * Issue on public tracker: [Issue 13] * FSP Notify(EnumInitPhaseAfterPciEnumeration) hangs if 00:02.03/00:02.03 are hidden * Release MR2 * Seems to get stuck on some SKUs only if hidden after MemoryInit * Workaround: Hide before MemoryInit * Issue on public tracker: [Issue 35] ### KabylakeFsp * MfgId and ModulePartNum in the DIMM_INFO struct are empty * Release 3.7.1 * Those values are typically consumed by SMBIOS type 17 * Workaround: none * Issue on public tracker: [Issue 22] * MRC forces memory re-training on cold boot on boards with Intel SPS * Releases 3.7.1, 3.7.6 * Workaround: Flash Intel ME instead of SPS * Issue on public tracker: [Issue 41] ### BraswellFsp * Internal UART can't be disabled using PcdEnableHsuart* * Release MR2 * Workaround: Disable internal UART manually after calling FSP * Issue on public tracker: [Issue 10] ### CoffeeLakeFsp * Disabling the internal graphics causes a crash in FSP-M * 7.0.68.40 and older version * Workaround: Set "tconfig->PanelPowerEnable = 0" * Issue on public tracker: [Issue 49] ## Open Source Intel FSP specification * [About Intel FSP](https://firmware.intel.com/learn/fsp/about-intel-fsp) * [FSP Specification 1.0](https://www.intel.in/content/dam/www/public/us/en/documents/technical-specifications/fsp-architecture-spec.pdf) * [FSP Specification 1.1](https://www.intel.com/content/dam/www/public/us/en/documents/technical-specifications/fsp-architecture-spec-v1-1.pdf) * [FSP Specification 2.0](https://www.intel.com/content/dam/www/public/us/en/documents/technical-specifications/fsp-architecture-spec-v2.pdf) * [FSP Specification 2.1](https://cdrdv2.intel.com/v1/dl/getContent/611786) ## Additional Features in FSP 2.1 specification - [PPI](ppi/ppi.md) ## Official bugtracker - [IntelFSP/FSP](https://github.com/IntelFsp/FSP/issues) [Issue 10]: https://github.com/IntelFsp/FSP/issues/10 [Issue 13]: https://github.com/IntelFsp/FSP/issues/13 [Issue 15]: https://github.com/IntelFsp/FSP/issues/15 [Issue 22]: https://github.com/IntelFsp/FSP/issues/22 [Issue 35]: https://github.com/IntelFsp/FSP/issues/35 [Issue 41]: https://github.com/IntelFsp/FSP/issues/41 [Issue 49]: https://github.com/IntelFsp/FSP/issues/49