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authorBill XIE <persmule@hardenedlinux.org>2022-07-07 16:18:57 +0800
committerMartin L Roth <gaumless@tutanota.com>2022-07-30 18:39:31 +0000
commit4e43abf9c120b5a9ae4d920a71df1c7993e6a617 (patch)
tree338f77db7b370fd10f57103e467f19892c5d7802 /Documentation/mainboard
parenta955efc190475bc1746c872395729a285c95d95e (diff)
mb/hp/z220_series: Improve the port for z220_sff_workstation
- Move configs for PCIe ports not present on z220_sff_workstation from the devicetree.cb of base board to the overridetree.cb of z220_cmt_workstation. - Add a note for ME/AMT Flash Override jumper, for it is hard to flash from OEM firmware either internally or externally without closing this jumper. - Add a side note for similar HP Compaq Elite 8300 SFF. Signed-off-by: Bill XIE <persmule@hardenedlinux.org> Change-Id: I35d8b97f52a83910a61c12b1f7367ee7a19a9ad7 Reviewed-on: https://review.coreboot.org/c/coreboot/+/65703 Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-by: Paul Menzel <paulepanter@mailbox.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'Documentation/mainboard')
-rw-r--r--Documentation/mainboard/hp/z220_sff.md14
1 files changed, 12 insertions, 2 deletions
diff --git a/Documentation/mainboard/hp/z220_sff.md b/Documentation/mainboard/hp/z220_sff.md
index 0dfa653937..11676208ac 100644
--- a/Documentation/mainboard/hp/z220_sff.md
+++ b/Documentation/mainboard/hp/z220_sff.md
@@ -44,8 +44,17 @@ The SPI flash can be accessed using [flashrom].
External programming with an SPI adapter and [flashrom] does work, but it powers the
whole southbridge complex. You need to supply enough current through the programming adapter.
-If you want to use a SOIC pomona test clip, you have to cut the 2nd DRAM DIMM holder,
-as otherwise there's not enough space near the flash.
+If you want to use a SOIC pomona test clip, you have to cut the 2nd DRAM DIMM holder, as
+otherwise there's not enough space near the flash.
+
+In both case, if ME has not been completely disabled, ME/AMT Flash Override jumper had better
+be temporary closed for flashing to disable the locking of regions, and prevent ME to run and
+interfere.
+
+## Side note
+The mainboard of [HP Compaq Elite 8300 SFF] is very similar to the one of Z220 SFF, except
+that Compaq Elite 8300 uses Q77 instead of C216 for its PCH, and their boot firmwares are
+even interchangeable, so should do coreboot images built for them.
## Technology
@@ -66,5 +75,6 @@ as otherwise there's not enough space near the flash.
```
[HP Z220 SFF Workstation]: https://support.hp.com/za-en/document/c03386950
+[HP Compaq Elite 8300 SFF]: https://support.hp.com/us-en/document/c03345460
[HP]: https://www.hp.com/
[flashrom]: https://flashrom.org/Flashrom