[PATCH v2 0/3] arm64: Drop support for VPIPT i-cache policy

[Zenghui Yu]

On 2023/11/28 1:26, Marc Zyngier wrote:
> ARMv8.2 introduced support for VPIPT i-caches, the V standing for
> VMID-tagged. Although this looks like a reasonable idea, no
> implementation has ever made it into the wild.
> 
> Linux has supported this for over 6 years (amusingly, just as the
> architecture was dropping support for AVIVT i-caches), but we had no
> way to even test it, and it is likely that this code was just
> bit-rotting.
> 
> However, in a recent breakthrough (XML drop 2023-09, tagged as
> d55f5af8e09052abe92a02adf820deea2eaed717), the architecture has
> finally been purged of this option, making VIPT and PIPT the only two
> valid options.
> 
> This really means this code is just dead code. Nobody will ever come
> up with such an implementation, and we can just get rid of it.
> 
> Most of the impact is on KVM, where we drop a few large comment blocks
> (and a bit of code), while the core arch code loses the detection code
> itself.
> 
> Marc Zyngier (3):
>   KVM: arm64: Remove VPIPT I-cache handling
>   arm64: Kill detection of VPIPT i-cache policy
>   arm64: Rename reserved values for CTR_EL0.L1Ip

Series looks good to me.  With Anshuman's comment addressed,

Reviewed-by: Zenghui Yu <yuzenghui at huawei.com>