[PATCH v3 0/6] Intel MAX10 BMC Secure Update Driver

Russ Weight
2020-10-09T01:14:29Z

The Intel MAX10 BMC Secure Update driver instantiates the FPGA
Security Manager class driver and provides the callback functions
required to support secure updates on Intel n3000 PAC devices.
This driver is implemented as a sub-driver of the Intel MAX10 BMC
mfd driver. Future instances of the MAX10 BMC will support other
devices as well (e.g. d5005) and this same MAX10 BMC Secure
Update driver will receive modifications to support that device.

This driver interacts with the HW secure update engine of the
BMC in order to transfer new FPGA and BMC images to FLASH so
that they will be automatically loaded when the FPGA card reboots.
Security is enforced by hardware and firmware. The MAX10 BMC
Secure Update driver interacts with the firmware to initiate
an update, pass in the necessary data, and collect status on
the update.

This driver passes call-back function pointers to the FPGA
Security Manager Class Driver to support the following functions:

(1) Instantiate and monitor a secure update
(2) Display security information including: Root Entry Hashes (REH),
Canceled Code Signing Keys (CSK), and flash update counts for
both BMC and FPGA images.

These patches are dependent on other patches that are under
review. If you want to apply these patches on linux-next,
please apply these patches first, in the following order:

(1 patch) https://marc.info/?l=linux-fpga&m=159782339732362&w=2
(4 patches) https://marc.info/?l=linux-fpga&m=160014074806950&w=2
(7 patches) https://marc.info/?l=linux-fpga&m=160211621032687&w=2

Changelog v2 -> v3:
- Changed "MAX10 BMC Security Engine driver" to "MAX10 BMC Secure
Update driver"
- Changed from "Intel FPGA Security Manager" to FPGA Security Manager"
- Changed: iops -> sops, imgr -> smgr, IFPGA_ -> FPGA_, ifpga_ to fpga_
- Removed wrapper functions (m10bmc_raw_*, m10bmc_sys_*). The
underlying functions are now called directly.
- Changed "_root_entry_hash" to "_reh", with a comment explaining
what reh is.
- Renamed get_csk_vector() to m10bmc_csk_vector()
- Changed calling functions of functions that return "enum fpga_sec_err"
to check for (ret != FPGA_SEC_ERR_NONE) instead of (ret)

Changelog v1 -> v2:
- These patches were previously submitted as part of a larger V1
patch set under the title "Intel FPGA Security Manager Class Driver".
- Grouped all changes to include/linux/mfd/intel-m10-bmc.h into a
single patch: "mfd: intel-m10-bmc: support for MAX10 BMC Security
Engine".
- Removed ifpga_sec_mgr_init() and ifpga_sec_mgr_uinit() functions.
- Adapted to changes in the Intel FPGA Security Manager by splitting
the single call to ifpga_sec_mgr_register() into two function
calls: devm_ifpga_sec_mgr_create() and ifpga_sec_mgr_register().
- Replaced small function-creation macros for explicit function
declarations.
- Bug fix for the get_csk_vector() function to properly apply the
stride variable in calls to m10bmc_raw_bulk_read().
- Added m10bmc_ prefix to functions in m10bmc_iops structure
- Implemented HW_ERRINFO_POISON for m10bmc_sec_hw_errinfo() to
ensure that corresponding bits are set to 1 if we are unable
to read the doorbell or auth_result registers.
- Added comments and additional code cleanup per V1 review.

Russ Weight (6):
mfd: intel-m10-bmc: support for MAX10 BMC Secure Updates
fpga: m10bmc-sec: create max10 bmc secure update driver
fpga: m10bmc-sec: expose max10 flash update counts
fpga: m10bmc-sec: expose max10 canceled keys in sysfs
fpga: m10bmc-sec: add max10 secure update functions
fpga: m10bmc-sec: add max10 get_hw_errinfo callback func

MAINTAINERS | 1 +
drivers/fpga/Kconfig | 11 +
drivers/fpga/Makefile | 3 +
drivers/fpga/intel-m10-bmc-secure.c | 599 ++++++++++++++++++++++++++++
include/linux/mfd/intel-m10-bmc.h | 85 ++++
5 files changed, 699 insertions(+)
create mode 100644 drivers/fpga/intel-m10-bmc-secure.c

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2.17.1