[PATCH v5 31/36] KVM: arm64: Add kvm_pgtable_stage2_find_range()

[Will Deacon]

On Mon, Mar 15, 2021 at 02:35:31PM +0000, Quentin Perret wrote:
> Since the host stage 2 will be identity mapped, and since it will own
> most of memory, it would preferable for performance to try and use large
> block mappings whenever that is possible. To ease this, introduce a new
> helper in the KVM page-table code which allows to search for large
> ranges of available IPA space. This will be used in the host memory
> abort path to greedily idmap large portion of the PA space.
> 
> Signed-off-by: Quentin Perret <qperret at google.com>
> ---
>  arch/arm64/include/asm/kvm_pgtable.h | 29 +++++++++
>  arch/arm64/kvm/hyp/pgtable.c         | 89 ++++++++++++++++++++++++++--
>  2 files changed, 114 insertions(+), 4 deletions(-)

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

Will