Upstream has been working with me to try to determine what is going on here. The conclusion is that we believe that firmware is piggy-backing on the ARM_SMCCC_ARCH_WORKAROUND calls, and is clobbering some of the registers in the x4-x17 range. The patch series mentioned in Comment #9 happens to avoid consuming those registers, hiding the issue. Apparently clobbering those registers was previously OK, but the SMCCCv1.1 update mandates that x4-x17 be preserved, which the firmware authors may have missed.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1931728 Title: [scalingstack bos01] bionic (arm64) instances always fail to boot on eMAGs in this cloud To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1931728/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
