ARM Trusted Firmware ARM UEFI SCT update
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- Cornelius Higgins
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1 presented by ARM Trusted Firmware ARM UEFI SCT update UEFI US Fall Plugfest September 20-22, 2016 Presented by Charles García-Tobin (ARM) Updated
2 Agenda ARM Trusted Firmware What and why UEFI SCT update progress UEFI Plugfest September
3 ARM Trusted Firmware (ARM TF) a little history 4 years ago (ish) UEFI Plugfest September
4 Wild west before ARM TF Power management development model UEFI Plugfest September
5 Wild west before ARM TF Power management development model Proprietary HW UEFI Plugfest September
6 Wild west before ARM TF Power management development model Proprietary HW Proprietary SW+FW UEFI Plugfest September
7 Wild west before ARM TF Power management development model Proprietary HW Proprietary SW+FW UEFI Plugfest September
8 Wild west before ARM TF Power management development model Proprietary HW Proprietary SW+FW UEFI Plugfest September
9 Wild west before ARM TF Development model caused a few problems Varied quality Expense Fragmentation Number of PM drivers Number HW vendors Number of vendor SoCs UEFI Plugfest September
10 So we created specs Power State Coordination Interface Powering cores up or down for idle, 2ndary boot, hotplug System reset/shutdown SMC calling convention Helps in supporting multiple vendors in secure firmware Spec available today in ARM infocenter: PSCI: SMC: UEFI Plugfest September
11 But specs are nothing without code So we created the ARM Trusted Firmware project Implements PSCI and SMC calling convention Provides reference early boot Applicable to all segments Open Source at GitHub BSD License Contributions welcome UEFI Plugfest September
12 Things better as a result PSCI is supported by every major OS vendor PSCI is supported by every major Hypervisor vendor ARM TF has been taken as reference by most silicon vendors It is the standard for ARMv8-A UEFI Plugfest September
13 What is ARM Trusted Firmware? Normal World Secure World EL0 Guest A App 1 Guest A App 2 Guest B App 1 Guest B App 2 Trusted App 1 Trusted App 2 Secure EL0 EL1 Guest OS Kernel A Guest OS Kernel B Trusted OS Boot Firmware Secure EL1 EL2 UEFI Hypervisor Key SMC EL3 Execution EL3 EL3 Runtime Firmware (Secure Monitor) PSCI Boot Firmware Secure EL1 / EL0 Execution EL2 Execution EL1 / EL0 Execution UEFI Plugfest September
14 What is ARM Trusted Firmware? Normal World Secure World EL0 Guest A App 1 Guest A App 2 Guest B App 1 Guest B App 2 Trusted App 1 Trusted App 2 Secure EL0 EL1 Guest OS Kernel A ARM Trusted Firmware Guest OS Kernel B Trusted OS Boot Firmware Secure EL1 EL2 UEFI Hypervisor Key SMC EL3 Execution EL3 EL3 Runtime Firmware (Secure Monitor) PSCI Boot Firmware Secure EL1 / EL0 Execution EL2 Execution EL1 / EL0 Execution UEFI Plugfest September
15 What is ARM Trusted Firmware? Normal World Secure World EL0 Guest A App 1 Guest A App 2 Guest B App 1 Guest B App 2 Trusted App 1 Trusted App 2 Secure EL0 EL1 Guest Linux Kernel A ARM Trusted Firmware Guest Linux Kernel B Trusted OS Boot Firmware Secure EL1 EL2 UEFI Hypervisor Key SMC EL3 Execution EL3 EL3 Runtime Firmware (Secure Monitor) PSCI Boot Firmware Secure EL1 / EL0 Execution EL2 Execution EL1 / EL0 Execution Optional UEFI Plugfest September
16 How does it relate to UEFI specs? ACPI core power is intimately tied to PSCI LPI states introduced in 6.0 map directly to PSCI Provides a generic implementation for UEFI reset run time services Trusted boot flow provides SEC on our reference platforms OSPM System reset / off UEFI RT ARM TF + PSCI Hotplug / SMP boot Idle management ACPI LPI+FFH UEFI Plugfest September
17 SCT update UEFI Plugfest September
18 SCT update UEFI 2.5 AArch64 beta version Number of updates and fixes Various fixes in test for network statistics, ExitBootService, simple file system and watchdog Submitted six patches 10,000 warning fixed(guid definitions, incompatible pointers) in the UEFI-SCT Available here: UEFI 2.6 AArch64 alpha version Add support for Ramdisk/NVMe part test have been submitted Available here: UEFI Plugfest September
19 SCT discussions SCT availability and development model Proposed protocols to help with testing partial implementations We have run into issues with robustness of shell over SerialIo It crashes when the SCT framework tries to open the SerialIo protocol in exclusive mode. UEFI Plugfest September
20 Thanks for attending the UEFI US Fall Plugfest 2016 For more information on the Unified EFI Forum and UEFI Specifications, visit presented by UEFI Plugfest September
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