On Fri, Mar 7, 2025, at 23:02, Roman Kisel wrote:

The KVM/arm64 uses SMCCC to detect hypervisor presence. That code is
private, and it follows the SMCCC specification. Other existing and
emerging hypervisor guest implementations can and should use that
standard approach as well.

Factor out a common infrastructure that the guests can use, update KVM
to employ the new API. The cenrtal notion of the SMCCC method is the
UUID of the hypervisor, and the API follows that.

No functional changes. Validated with a KVM/arm64 guest.

Signed-off-by: Roman Kisel <redacted>

Acked-by: Arnd Bergmann <arnd@arndb.de>