arm-trusted-firmware

History

Manish V Badarkhe 3b8456bd1c runtime_exceptions: Update AT speculative workaround As per latest mailing communication [1], we decided to update AT speculative workaround implementation in order to disable page table walk for lower ELs(EL1 or EL0) immediately after context switching to EL3 from lower ELs. Previous implementation of AT speculative workaround is available here: `45aecff00` AT speculative workaround is updated as below: 1. Avoid saving and restoring of SCTLR and TCR registers for EL1 in context save and restore routine respectively. 2. On EL3 entry, save SCTLR and TCR registers for EL1. 3. On EL3 entry, update EL1 system registers to disable stage 1 page table walk for lower ELs (EL1 and EL0) and enable EL1 MMU. 4. On EL3 exit, restore SCTLR and TCR registers for EL1 which are saved in step 2. [1]: https://lists.trustedfirmware.org/pipermail/tf-a/2020-July/000586.html Change-Id: Iee8de16f81dc970a8f492726f2ddd57e7bd9ffb5 Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>		4 years ago
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bl31_entrypoint.S	Changes necessary to support SEPARATE_NOBITS_REGION feature	5 years ago
crash_reporting.S	Fix crash dump for lower EL	5 years ago
ea_delegate.S	aarch64: Fix stack pointer maintenance on EA handling path	5 years ago
runtime_exceptions.S	runtime_exceptions: Update AT speculative workaround	4 years ago