tree 404d8bb9f6750c17eb3a81045d1ef51369e26a66
parent 9860fcb74509d7ccea8418f374b522657e245bec
author David Greenaway <dgreenaway@google.com> 1623977161 +0000
committer CQ Bot <commit-bot@chromium.org> 1623977161 +0000

[kernel][hypervisor] Ensure singleton mutex is initialised.

Due to fxbug.dev/78920, singleton mutexes are not thread-safe on their
first use. In the case of the hypervisor, this can lead to the system's
EL2 state incorrectly being initialised multiple times, leading to stack
corruption of EL2.

We temporarily work around the issue until the underlying bug is fixed
by ensuring the mutex is initialised during system boot.

Bug: 78920
Bug: 77932
Change-Id: Ie46cde3ea2e06ae594c26be6470b4a6e0f4d6830
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/544301
Reviewed-by: Abdulla Kamar <abdulla@google.com>
Reviewed-by: Adrian Danis <adanis@google.com>
Commit-Queue: David Greenaway <dgreenaway@google.com>