Change in coreboot[master]: docs/mb/supermicro: add SUM tool for flashing with disabled ME

[Michael Niewöhner (Code Review)]

Michael Niewöhner has submitted this change. ( https://review.coreboot.org/c/coreboot/+/49887 )

Change subject: docs/mb/supermicro: add SUM tool for flashing with disabled ME
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docs/mb/supermicro: add SUM tool for flashing with disabled ME

Change-Id: I08543c0908a6cb4ef9fb46d0eb3a7aa481fb95d9
Signed-off-by: Michael Niewöhner 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49887
Reviewed-by: Angel Pons 
Tested-by: build bot (Jenkins) 
---
M Documentation/mainboard/supermicro/flashing_on_vendorbmc.md
1 file changed, 12 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Angel Pons: Looks good to me, approved

diff --git a/Documentation/mainboard/supermicro/flashing_on_vendorbmc.md b/Documentation/mainboard/supermicro/flashing_on_vendorbmc.md
index e02c57b..c831302 100644
--- a/Documentation/mainboard/supermicro/flashing_on_vendorbmc.md
+++ b/Documentation/mainboard/supermicro/flashing_on_vendorbmc.md
@@ -30,3 +30,15 @@

Make sure that the ME isn't in recovery mode, otherwise you get an error
 message on updating the BIOS.
+
+## Flashing with disabled ME
+
+If ME is disabled via `me_cleaner` or the ME recovery jumper, it is still
+possible to flash remotely with the [`Supermicro Update Manager`](SUM) (`SUM`).
+
+```sh
+./sum -i <remote BMC IP> -u <user> -p <password> -c UpdateBios --reboot \
+  --force_update --file build/coreboot.rom
+```
+
+[SUM]: https://www.supermicro.com/SwDownload/SwSelect_Free.aspx?cat=SUM