smallsolar/u-boot
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mx7ulp: hab: Add hab_status command for HABv4 M4 boot

Browse Source 
When booting in low power or dual boot modes the M4 binary is
authenticated by the M4 ROM code.

Add an option in hab_status command so users can retrieve M4 HAB
failure and warning events.

=> hab_status m4

   Secure boot disabled

   HAB Configuration: 0xf0, HAB State: 0x66
   No HAB Events Found!

Add command documentation in mx6_mx7_secure_boot.txt guide.

As HAB M4 API cannot be called from A7 core the code is parsing
the M4 HAB persistent memory region. The HAB persistent memory
stores HAB events, public keys and others HAB related information.

The HAB persistent memory region addresses and sizes can be found
in AN12263 "HABv4 RVT Guidelines and Recommendations".

Reviewed-by: Utkarsh Gupta <utkarsh.gupta@nxp.com>
Reviewed-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Breno Lima <breno.lima@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Breno Lima
2021-03-25 17:30:13 +08:00
committed by Stefano Babic
parent f217470b39
commit 58f75efeaf
3 changed files with 139 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
doc/imx/habv4/guides/mx6_mx7_secure_boot.txt
View File

@@ -213,6 +213,30 @@ the example below:
HAB Configuration: 0xf0, HAB State: 0x66
No HAB Events Found!
1.6.1 Verifying HAB events in i.MX7ULP
---------------------------------------
When booting i.MX7ULP in low power or dual boot modes the M4 binary is
authenticated by an independent HAB in M4 ROM code using a
different SRK key set.
The U-Boot provides a M4 option in hab_status command so users can retrieve
M4 HAB failure and warning events.
- Verify HAB M4 events:
=> hab_status m4
Secure boot disabled
HAB Configuration: 0xf0, HAB State: 0x66
No HAB Events Found!
As HAB M4 API cannot be called from A7 core the command is parsing the M4 HAB
persistent memory region, M4 software should not modify this reserved region.
Details about HAB persistent memory region can be found in AN12263[2].
1.7 Closing the device
-----------------------
@@ -400,3 +424,4 @@ If no HAB events were found the zImage is successfully signed.
References:
[1] AN4581: "Secure Boot on i.MX 50, i.MX 53, i.MX 6 and i.MX 7 Series using
HABv4" - Rev 2.
[2] AN12263: "HABv4 RVT Guidelines and Recommendations" - Rev 0.