Re: [PATCH v3 02/15] KVM: arm64: Provide {get,put}_page() stubs for early hyp allocator

Will Deacon
2021-12-09T10:14:20Z

On Wed, Dec 01, 2021 at 05:03:56PM +0000, Quentin Perret wrote:
> In nVHE protected mode, the EL2 code uses a temporary allocator during
> boot while re-creating its stage-1 page-table. Unfortunately, the
> hyp_vmmemap is not ready to use at this stage, so refcounting pages
> is not possible. That is not currently a problem because hyp stage-1
> mappings are never removed, which implies refcounting of page-table
> pages is unnecessary.
>
> In preparation for allowing hypervisor stage-1 mappings to be removed,
> provide stub implementations for {get,put}_page() in the early allocator.
>
> Signed-off-by: Quentin Perret <qperret@google.com>
> ---
> arch/arm64/kvm/hyp/nvhe/early_alloc.c | 5 +++++
> 1 file changed, 5 insertions(+)

Acked-by: Will Deacon <will@kernel.org>

Will