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Add support for gicv2m as a child of gicv3

Description

Add support for gicv2m as a child of gicv3

On some systems, e.g. Parallels set to host a Linux VM under an M1 Mac,
there is a GICv2m as a child of the GICv3. We previously assumed the
GICv2m was always a child of a GICv2. Fix this by adding the needed
support to the GICv3 driver.

PR: 258136
Reported by: trasz
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D31768

Details

Provenance
andrewAuthored on Sep 1 2021, 9:41 AM
Differential Revision
D31768: Add support for gicv2m as a child of gicv3
Parents
R10:c6f3076d4405: Move the GICv2m msi handling to the parent
Branches
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