KVM: arm64: Allow kvm_hyp_memcache usage outside of stage-2

Although currently limited to guest stage-2 page-table allocations,
struct kvm_hyp_memcache is a useful primitive for passing a list of
discontiguous pages between host and hypervisor.

Introduce init_hyp_memcache() to initialise a generic hyp memcache, and
init_hyp_stage2_memcache() for stage-2 specific memcaches. The generic
initialiser will be used to top up the upcoming pKVM heap allocator.

Note that the generic kvm_hyp_memcache does not account for the
allocated memory. This is expected: donations to the heap allocator are
shared and recycled, they cannot be accounted for a specific VM.

Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
Reviewed-by: Fuad Tabba <fuad.tabba@linux.dev>
Tested-by: Fuad Tabba <fuad.tabba@linux.dev>
Link: https://patch.msgid.link/20261001142849.3367614-6-vdonnefort@google.com
Signed-off-by: Marc Zyngier <maz@kernel.org>

0 files changed, 0 insertions, 0 deletions