[PATCH][for-stable-v5.11]] arm64: Unconditionally set virtual cpu id registers

[Greg KH]

On Tue, Mar 16, 2021 at 11:25:00AM +0000, Vladimir Murzin wrote:
> Commit 78869f0f0552 ("arm64: Extract parts of el2_setup into a macro")
> reorganized el2 setup in such way that virtual cpu id registers set
> only in nVHE, yet they used (and need) to be set irrespective VHE
> support. Lack of setup causes 32-bit guest stop booting due to MIDR
> stay undefined.
> 
> Fixes: 78869f0f0552 ("arm64: Extract parts of el2_setup into a macro")
> Signed-off-by: Vladimir Murzin <vladimir.murzin at arm.com>
> ---
> 
> There is no upstream fix since issue went away due to code there has
> been reworked in 5.12: nVHE comes first, so virtual cpu id register
> are always set.
> 
> Maintainers, please, Ack.

Why not just use the "rework" patch instead that fixes this issue?


that's always preferred instead of one-off patches.

thanks,

greg k-h