KVM: arm64: Alloc simple_buffer_page using pKVM hyp allocator

In protected mode, transition the allocation of the simple_ring_buffer
structures from the host to the hypervisor using the new pKVM heap
allocator.

Previously, the host allocated and donated a contiguous backing memory
for these structures. In pKVM the hypervisor can now allocate them
dynamically.

Use the pkvm_call_hyp_req() wrapper in the host to invoke
__tracing_load, which automatically handles any top-up requests if the
hypervisor runs out of heap memory during allocation.

Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
Tested-by: Fuad Tabba <fuad.tabba@linux.dev>
Reviewed-by: Fuad Tabba <fuad.tabba@linux.dev>
Link: https://patch.msgid.link/20261001142849.3367614-19-vdonnefort@google.com
Signed-off-by: Marc Zyngier <maz@kernel.org>

0 files changed, 0 insertions, 0 deletions