Linaro-open-discussions December 2021

linaro-open-discussions@op-lists.linaro.org

3 participants
3 discussions

[PATCH 00/10] Rebase of DOE patches plus the basic CMA support on top

by Jonathan Cameron

For sharing with Lorenzo. I'm holding off on posting the CMA patches until the open question around DOE / auxiliary bus is resolved. Not clear if we'll end up back where we started. Note that other than the devm_ fix patch I've not tweaked the DOE series for review comments. Base is cxl/next 53989fad1286e652ea3655ae3367ba698da8d2ff (the tree might have moved again in the meantime) Ira Weiny (1): cxl/cdat: Parse out DSMAS data from CDAT table Jonathan Cameron (9): PCI: Add vendor ID for the PCI SIG PCI/DOE: Add Data Object Exchange Aux Driver cxl/pci: Add DOE Auxiliary Devices cxl/mem: Add CDAT table reading from DOE lib/asn1_encoder: Add a function to encode many byte integer values. spdm: Introduce a library for DMTF SPDM PCI/CMA: Initial support for Component Measurement and Authentication ECN cxl/pci: Add really basic CMA authentication support. cxl: Fixes for wrong device in devm_ calls. drivers/cxl/Kconfig | 2 + drivers/cxl/cdat.h | 81 +++ drivers/cxl/core/memdev.c | 157 +++++ drivers/cxl/cxl.h | 10 + drivers/cxl/cxlmem.h | 50 ++ drivers/cxl/pci.c | 231 ++++++- drivers/pci/Kconfig | 19 + drivers/pci/Makefile | 5 + drivers/pci/cma.c | 105 +++ drivers/pci/doe.c | 701 +++++++++++++++++++ include/linux/asn1_encoder.h | 3 + include/linux/pci-cma.h | 19 + include/linux/pci-doe.h | 63 ++ include/linux/pci_ids.h | 1 + include/linux/spdm.h | 104 +++ include/uapi/linux/pci_regs.h | 29 +- lib/Kconfig | 3 + lib/Makefile | 2 + lib/asn1_encoder.c | 54 ++ lib/spdm.c | 1196 +++++++++++++++++++++++++++++++++ 20 files changed, 2833 insertions(+), 2 deletions(-) create mode 100644 drivers/cxl/cdat.h create mode 100644 drivers/pci/cma.c create mode 100644 drivers/pci/doe.c create mode 100644 include/linux/pci-cma.h create mode 100644 include/linux/pci-doe.h create mode 100644 include/linux/spdm.h create mode 100644 lib/spdm.c -- 2.32.0

2 years, 3 months

Linaro OP-TEE Contributions (LOC) monthly meeting - Dec 23 CANCELLED

by Ruchika Gupta

Hi, In light of the holiday season we are not expecting too many joiners on Dec 23. Hence, let's cancel the LOC (Linaro OP-TEE Contribution) monthly meeting scheduled for next week. Wish you all a great holiday and a happy new year. The next scheduled meeting will be on 27th January 2022. Regards, Ruchika (On behalf of OP-TEE team)

2 years, 4 months

SCMI perf-domain protocol for DVFS

by Ulf Hansson

Hi all, This email intends to ask for potential interest in extending the support for the SCMI perf-domain protocol in the Linux kernel and in the firmware. Please, feel free to ignore this, while a short answer like "sounds interesting" would be sufficient information at this point. Some more details below. Today, the current support in the Linux kernel for the SCMI perf-domain protocol, is limited to be used for CPU frequency scaling, through the cpufreq subsystem. However, the SCMI perf-domain protocol isn't really limited to CPUs, but fits well for other generic peripheral devices too. By extending the support, we can avoid the need for SoC specific protocols/interfaces, while scaling performance for non-CPU devices. >From the Linux kernel point of view, we already have generic support for DVFS (Dynamic Voltage Frequency Scaling), through a mixture of subsystems/libraries. Without going into details, we should be able to tap into these existing infrastructures, to add support for the SCMI perf-protocol. In this way, the support would be generic and nicely abstracted from lower layer drivers/subsystems. Thoughts? Kind regards Ulf Hansson, Linaro Kernel Team

2 years, 4 months

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Linaro-open-discussions December 2021