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  • #311

Closed
Open
Created Jun 19, 2020 by Emily@emily🤖

user/grub: add arm-smmu.disable_bypass=n quirk for Cavium ThunderX

Bugzilla ID 311
Reporter Max Rees (sroracle)
Assignee Max Rees (sroracle)
Reported 2020-06-19 18:50:33 -0500
Modified 2020-06-22 06:03:19 -0500
Status CONFIRMED
Version 1.0-RC1
Hardware Adélie Linux / [Community] ARM (64-bit)
Importance --- / normal
Package(s) user/grub
See also https://bugzilla.redhat.com/show_bug.cgi?id=1734557

Description

Linux >= 5.2 contains the following commit, which breaks boot on Cavium ThunderX machines because the Gigabyte devicetree it uses is broken:

https://github.com/gregkh/linux/commit/954a03be033c7cef80ddc232e7cbdb17df735663

We need arm-smmu.disable_bypass=n on these machines.

The "see also" RH bug mentions that iommu.passthrough=1 may also be necessary, but it did not seem needed in order to boot athena.

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