On Mon, 27 Jul 2020 14:29:08 +0530, Aneesh Kumar K.V wrote:
> This adds a kernel command line option that can be used to disable GTSE
> support.
> Disabling GTSE implies kernel will make hcalls to invalidate TLB entries.
>
> This was done so that we can do VM migration between configs that
> enable/disable
> GTSE support via hypervisor. To migrate a VM from a system that supports
> GTSE to a system that doesn't, we can boot the guest with
> radix_hcall_invalidate=on, thereby forcing the guest to use hcalls for TLB
> invalidates.
>
> [...]
Applied to powerpc/next.
[1/1] powerpc/book3s64/radix: Add kernel command line option to disable radix
GTSE
https://git.kernel.org/powerpc/c/bf6b7661f41615c0815fce0a3f27acb5fc005470
cheers
