Re: [PATCH v3 0/6] arm64: Clean up and simplify PA space size handling

[Marc Zyngier <maz@kernel.org>]

On Thu, 12 Dec 2024 08:18:42 +0000,
Ard Biesheuvel <ardb+git@google.com> wrote:
> 
> From: Ard Biesheuvel <ardb@kernel.org>
> 
> This series addresses a number of buglets related to how we handle the
> size of the physical address space when building LPA2 capable kernels:
> 
> - reject 52-bit physical addressess in the mapping routines when LPA2 is
>   configured but not available at runtime
> - ensure that TCR.IPS is not set to 52-bits if LPA2 is not supported
> - ensure that TCR_EL2.PS and DS match the host, regardless of whether
>   LPA2 is available at stage 2
> - don't rely on kvm_get_parange() and invalid physical addresses as
>   control flags in the pKVM page donation APIs
> 
> Finally, the configurable 48-bit physical address space limit is dropped
> entirely, as it doesn't buy us a lot now that all the PARange and {I}PS
> handling is done at runtime.

Acked-by: Marc Zyngier <maz@kernel.org>

	M.

-- 
Without deviation from the norm, progress is not possible.