KVM: arm64: Add FF-A trace event

Define a hypervisor trace event for FF-A smc calls. Log the function
number and the associated arguments when the hypervisor traps the FF-A smc
request coming from the host. Refactor the handling of the FF-A host smc
calls without chaning the intended behaviour.

Change-Id: Ie9993f946db07b312738328a62d53a99d47d5f34
Signed-off-by: Sebastian Ene <sebastianene@google.com>
2 files changed