[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [XEN PATCH] xen/arm: Relax GIC version check
Julien Grall writes ("Re: [XEN PATCH] xen/arm: Relax GIC version check"): > On 20/01/2021 11:26, Vladimir Murzin wrote: > > Supported values are > > > > 0b0000 GIC CPU interface system registers not implemented. > > > > 0b0001 System register interface to versions 3.0 and 4.0 of the GIC > > CPU interface is supported. > > > > 0b0011 System register interface to version 4.1 of the GIC CPU > > interface is supported. > > > > 4.1 is still backward compatible with 4.0/3.0, moreover ARM ARM > > guarantees that future versions of the GIC CPU interface retain > > backwards compatible. > > > > Signed-off-by: Vladimir Murzin <vladimir.murzin@xxxxxxx> > > Acked-by: Julien Grall <jgrall@xxxxxxxxxx> > > @Ian: I would like your put as the RM for 4.15. > > Technically, it could be consider as a new "feature" because Xen would > fail to boot on such HW. > > However, I think the change is small enough and doesn't introduce risk > on existing supported HW. > > Therefore, I would like to merge it for 4.15. @Ian does it sounds good > to you? Thank you for this analysis. I think it does need a freeze exception. But your argument is convincing, so Release-Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
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